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TRANSCRIPT
APPENDICES
City of Santa Rosa and County of Sonoma
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TABLE OF CONTENTS
City of Santa Rosa and County of Sonoma
APPENDICES
APPENDIX A: DETERMINATION WORKSHEET A‐1
APPENDIX B: BMP SELECTION TABLE A‐7
APPENDIX C: STORM WATER CALCULATOR A‐12
APPENDIX D: PRELIMINARY SUSMP SUBMITTAL GUIDE A‐18
APPENDIX E: BMP FACT SHEETS, DETAILS AND INSPECTION A‐21 CHECKLISTS
LIVING ROOF A‐21 RAINWATER HARVESTING A‐24 INTERCEPTOR TREES A‐31 VEGETATED BUFFER STRIPS A‐33 BOVINE TERRACE A‐40 IMPERVIOUS AREA DISCONNECTION A‐47 RAIN GARDEN A‐54 BIORETENTION A‐64 CONSTRUCTED WETLAND A‐85 INFILTRATION TRENCH A‐92 POROUS PAVEMENT A‐95 VEGETATED SWALE A‐103 FLOW THROUGH PLANTER A‐112 PROPRIETARY UNITS A‐120
APPENDIX F: PLANT AND TREE LISTS A‐123
APPENDIX G: SAMPLE PERVIOUS CONCRETE SPECIFICATIONS A‐125
APPENDIX H: FINAL SUSMP SUBMITTAL GUIDE A‐127
APPENDIX A
Low Impact Development Technical Design Manual
DETERMINATION WORKSHEET
Grading Permit Building Permit
Other Design Review Use Permit
Subdivision
Phone/EmailCity/State/Zip
Mailing Address
Project Name *Applicant Name
Site Address Mailing Address
City/Zip City/State/Zip
Permit Number(s) if applicable Phone/Email/Fax
Part 1: Information
PURPOSE: Use this form to determine whether or not this project will need to incorporate permanent Storm Water Best ManagementPractices (BMP's) and submit a Standard Urban Storm Water Mitigation Plan (SUSMP).APPLICABILITY: Requred with all entitilement application packages, improvement plans and building permit applications. Informationpresented on this worksheet must reflect the final development condition.
DETERMINATION WORKSHEET
Engineer Name
FOR OFFICE USE ONLY:Does Project require permanentstorm water BMP's?
Y N
Review Fee Paid?Y N
*Applicant is the owner or developer.
Type of Application/Project:
12/7/11 version 6
Print Form
Determination Worksheet
Page 2 of 6
Initial Determination:
Yes No
New Outfall
Disturbance of 1 acre or more of soil
Any new impervious surface
Part 2: Other Regulatory Determinations
2A. if YES, are any of the following a component of this project? (Check all that apply)
2. Does this Project require a section 401 permit? ²
3. Does this Project create or replace 10,000 sq ft or more of impervious surface?
If you checked any of the boxes in section 2A, please be advised that this Project will require NorthCoast Regional Water Quality Control Board review and permanent Storm Water BMP's designedin accordance with the Low Impact Development (LID) Technical Design Manual. Skip to page sixand sign the "acknowledgement signature section."
1. Additions, alterations, repairs and existing structures are not subject to the requirements of CALGreen. For further information on determining buildingpermit requirements, contact the govering agency's building department.2. A 401 permit is required from the North Coast Regional Water Quality Control Board (NCRWQCB) if any part of this project is located within or adjacentto "waters of the State" which can be a creek, drainage ditch, wetland or any seasonal waterway.For further information on determining 401 Permitrequirements, contact the North Coast Regional Water Quality Control Board.
1. Does this Project require a non-residential building permit for a newly constructed building without sleepingaccomodations? ¹
YES: This project may need to implement permanent Storm Water BMP's and be designed in accordancewith the Storm Water Low Impact Development (LID) Technical Design Manual due to CALGreenrequirements. Complete the remainder of this worksheet.
CALGREEN:
Section 401:
YES: Complete the remainder of this worksheet.
NO: This Project does not need to incorporate permanent Storm Water BMPs. Please go to page 6 andcomplete the exemption signature section.
NO: Complete the reminder of this worksheet.
3"Routine Maintenance Activity" This exemption includes activities such as overlays and/or resurfacing of existingroads or parking lots as well as trenching and patching activities and reroofing activities.4 "Emergency Redevelopment" The Regional Water Quality Control Board must agree that the activities areneeded to protect public health and safety to qualify for this exemption. 5"Reconstruction" is defined as work that replaces surfaces down to subgrade. Street width is measured fromface of curb to face of curb. Overlays, resurfacing, trenching, and patching are considered maintenance activitiesand are exempt.6 "Impervious Surface" is defined as an area that has been modified to reduce storm water runoff capture andpercolation into underlying soils. Such surfaces include rooftops, walkways, and parking areas. Permeable pavementsshall be consideredimpervious for this section if they have subdrains to preclude infiltration into underlying soils.
1. Does this development or redevelopment project create or replace a combined total of 1.0 acres or moreof impervious surface ? Yes No
Projects that Trigger Requirements:Please answer the following questions to determine whether this project requires permanent Storm Water BMP'sand the submittal of a SUSMP.
Part 4: Project Triggers
NO: Proceed to Part 4 below to see if this project will need to incorporate permanent StormWater BMP's.
Did you answer "YES" to any of the above questions in Part 3?
YES: Stop. This project is exempt and will not need to incorporate permanent storm waterBest Management Practices. Please go to Page 6 and complete the exemption signature section.
5. Is this a stand alone pedestrian pathway, trail or off street bike lane?Yes No
4. Is this a reconstruction project , undertaken by a public agency, of street or roads remaining within theoriginal footprint and less than 48 feet wide?Yes N o
3. Is this a project undertaken solely to install or reinstall public utilities (such as sewer or water lines) that doesnot include any additional street or road development or development activities?Yes No
2. Is this an emergency redevelopment activity required to protect public health and safety?Yes No
1. Is this a routine maintenance activity ³ that is being conducted to maintain original line and grade, hydrauliccapacity, and original purpose of facility such as resurfacing existing roads and parking lots?Yes No
PART 3: Exemptions
Determination Worksheet
Page 3 of 6
7 "Industrial Park" is defined as industrial facility or building and associated impervious surface on a site zoned or planned to allowindustrial or commercial development (planning for mixed use residential, industrial or commercial development and redevelopmentis included).
8"Commercial Strip Mall" is defined as commercial facility or impervious surface on a site zoned or planned to allow commercial orindustrial use (planning for mixed use residential, industrial or commercial development and redevelopment is included) with streetaccess and onsite parking.
Did you answer "YES" to any of the above questions in Part 4?
9. Is this project an automotive service facility creating or replacing a combined total of 10,000 ft² or more orimpervious surface ? Yes No
8. Is this project a parking lot (not included as part of a project type listed above) creating or replacing acombined total of 10,000 ft² or more or impervious surface or with 25 or more parking spaces?
Yes No
7. Is this project a restaurant creating or replacing a combined total of 10,000 ft² or more of impervious surface ? Yes No
6. Is this project a retail gasoline outlet creating or replacing a combined total of 10,000 ft² of more or impervioussurface ? Yes No
5. Is this project a Commercial strip mall creating or replacing a combined total of 10,000 ft² or more of impervioussurface ? Yes No
4. Is this project an industrial park creating or replacing a combined total of 10,000 ft² or more of impervioussurface ? Yes No
3. Does this project include four or more new homes? Yes No
2. Does this project create or replace a combined total or 10,000 ft² or more of impervious street, roads, highways, orfreeway construction or reconstruction? Yes No
Determination Worksheet
Page 4 of 6
YES: The project must implement permanent Storm Water BMP's and be designed in accordance with the StormWater LID Technical Design Manual. Please complete the remainder of this worksheet. sign under the"Acknowledgment Section" on page 6.
NO: Stop. The project will not need to incorporate permanent Storm Water BMP's. Please continue to Page 6and complete the exemption signature section.
Commercial Industrial Residential Public
3. Existing impervious surface area: square feet or acres.
4. Proposed Land Use (s): (check all that apply)
Commercial Industrial Residential Public
2. Existing land use(s): (check all that apply)
1. Total Project area: Square feet or acres.
Determination Worksheet
Page 5 of 6
Other
Description of buildings, significant site features , etc.:
Other
Part 5: Project Description
Description of buildings, significant site features, etc.:
www.srcity.org/stormwaterLID The Storm Water Calculator and Determination Worksheet are provided in this manual for reference only.
____________________________________________Implementation Requirements: All calculations shall be completed using the "Storm Water Calculator" most updated version available at:
Design Goal: Capture (infiltration and/or reuse) of 100% of the volume of runoff generated by the 85thpercentile 24 hour storm event, as calculated using the "Urban Hydrology for Small Watersheds" TR55Manual. 100% volume capture is the ideal condition and if achieved satisfies all requirements so that noadditional treatment is required and pages 2 and 3 of this calculator do not need to be completed. Thisis a retention requirement.
Design Requirements: If the Design Goal of 100% volume capture is not achieved; then bothRequirement 1 100% Treatment AND Requirement 2 Volume Capture must be achieved.
Requirement 1: Treatment of 100% of the flow generated by the 85th percentile 24 hour storm event, ascalculated using the Rational Method and a know intensity of 0.20 inches per hour.
Requirement 2: Capture (infiltration and/or reuse) of the increase in volume of storm water due todevelopment generated by the 85th percentile 24 hour storm event, as calculated using the "UrbanHydrology for Small Watersheds" TR 55 Manual. This is a retention requirement.
_________________________
DateSignature of Property Owner or Developer
__________________________________
As the property owner or developer, I understand that this project is required to implement permanent StormWater Best Management Practices and the submittal of a SUSMP. Any unknown responses must be resolvedto determine if the project is subject to these requirements.
Acknowledgment Signature Section:
Determination Worksheet
Page 6 of 6
Exemption Signature Section:
__________________________________
Signature of Property Owner or Developer
_________________________
Date
As the property owner or developer, I understand that this project as currently designed does not requirepermanent Storm Water BMP's nor the submital of a SUSMP. I understand that redesign may requiresubmittal of a new Determination Worksheet and may require permananet Storm Water BMP's .
APPENDIX B
City of Santa Rosa and County of Sonoma
BMP SELECTION TABLE
APPENDIX B
BMP Selection Table
Best
Man
agem
ent
Practice (BMP)
Detail She
etDetail Title
Can b
e used
with
…
High G
roun
d Wate
r
Conta
mina
tion
Slope
Cons
traint
s
Achie
ves…
Treatm
ent Vo
lume C
aptur
e
Pollu
tion P
reven
tion
Cred
itBM
P in p
riorit
y sele
cted?
Yes
No
Expla
natio
n of s
electi
on
Othe
r note
s:
Universal LID
Features‐ to be
considered
on
all projects.
Living
Roo
fN/A
N/A
XX
XX
X
Rainwater
Harvestin
gN/A
N/A
XX
XX
Intercep
tor
Trees
N/A
N/A
XX
XX
Vegetated Bu
ffer
Strip
UN‐01
Vegetated
Buffe
r Strip
X
Bovine
Terrace
UN‐02
Bovine
Terrace
XX
Impe
rvious Area
Discon
nection
N/A
N/A
XX
XX
Universal LID
Features‐ to be
considered
on
all projects.
A‐7
APPENDIX B
BMP Selection Table
Best
Man
agem
ent
Practice (BMP)
Detail She
etDetail Title
Can b
e used
with
…
High G
roun
d Wate
r
Conta
mina
tion
Slope
Cons
traint
s
Achie
ves… Tre
atmen
t Volum
e Cap
ture
Pollu
tion P
reven
tion
Cred
itBM
P in t
his pr
iority
selec
ted? Ye
s
No
Expla
natio
n of s
electi
on
Othe
r note
s:Priority 1 an
d 1A
BMPs‐ to be
installed with
no
und
erdrains
or line
rs. M
ust
drain all stading
water with
in 72
hours.
Rain Garde
nP1
‐01
Rain Garde
nX
X
Roadsid
e Bioreten
tion
P1‐02
Roadsid
e Bioreten
tion ‐
no C & G
XX
Vegetated
Swale‐with
Bioreten
tion
P1‐06
Swale with
Bioreten
tion
XX
Constructed
Wetland
sN/A
N/A
XX
Infiltration
Tren
chP1
‐07
Infiltration
Tren
chX
X
Priority 1 an
d 1A
BMPs‐ to be
installed with
no
und
erdrains
or line
rs. M
ust
drain all stading
water with
in 72
hours.
A‐8
APPENDIX B
BMP Selection Table
Best
Man
agem
ent
Practice (BMP)
Detail She
etDetail Title
Can b
e used
with
…
High G
roun
d Wate
r
Conta
mina
tion
Slope
Cons
traint
s
Achie
ves… Tre
atmen
t Volum
e Cap
ture
Pollu
tion P
reven
tion
Cred
itBM
P in t
his pr
iority
selec
ted? Ye
s
No
Expla
natio
n of s
electi
on
Othe
r note
s:
Priority 2
BMPs‐ w
ith
subsurface
drains
installed
above the
capture
volume.
Rain Garde
nP2
‐01
Rain Garde
nX
X
P2‐02
Roadsid
e Bioretinton ‐
Flush De
sign
Roadsid
e
XX
P2‐03
Roadsid
e Bioreten
ion‐
Contiguo
us
SW
XX
P2‐04
Roadsid
e Bioreten
ion‐
Curb Ope
ning
XX
P2‐05
Roadsid
e Bioreten
ion‐
No C & G
XX
Pervious
Pavemen
tP2
‐06
Vegetated
Buffe
r Strip
XX
Constructed
Wetland
sN/A
N/A
XX
Priority 2
BMPs‐ w
ith
subsurface
drains
installed
above the
capture
volume.
Roadsid
e Bioreten
tion
A‐9
APPENDIX B
BMP Selection Table
Best
Man
agem
ent
Practice (BMP)
Detail She
etDetail Title
Can b
e used
with
…
High G
roun
d Wate
r
Conta
mina
tion
Slope
Cons
traint
s
Achie
ves… Tre
atmen
t Volum
e Cap
ture
Pollu
tion P
reven
tion
Cred
itBM
P in t
his pr
iority
selec
ted? Ye
s
No
Expla
natio
n of s
electi
on
Othe
r note
s:
Priority 3
BMPs‐
installed with
subd
rains
and/or
impe
rmeable
liner. D
oes n
ot
achieve
volume
capture and
must b
e used
as part o
f a
treatm
ent
train.
Rain Garde
nP3
‐01
Rain Garde
nX
XX
X
P3‐02
Roadsid
e Bioretinton ‐
Flush De
sign
Roadsid
e
XX
XX
P3‐03
Roadsid
e Bioreten
ion‐
Contiguo
us SW
XX
XX
P3‐04
Roadsid
e Bioreten
ion‐
Curb Ope
ning
XX
XX
P3‐05
Roadsid
e Bioreten
ion‐ No
C & G
XX
XX
X
Flow
Throu
gh
Planters
Pervious
Pavemen
tP1
‐04
Vegetated Bu
ffer
Strip
XX
XX
X
Vegetated
Swale
P3‐07
Vegetated Sw
ale
XX
XX
X
Bioreten
tion
Priority 3
BMPs‐
installed with
subd
rains
and/or
impe
rmeable
liner. D
oes n
ot
achieve
volume
capture and
must b
e used
as part o
f a
treatm
ent
train.
A‐10
APPENDIX B
BMP Selection Table
Best M
anagem
ent
Practice (BMP)
Can b
e used
with
…
High G
roun
d Wate
r
Conta
mina
tion
Slope
Cons
traint
s
Achie
ves… Tre
atmen
t Volum
e Cap
ture
Pollu
tion P
reven
tion
Cred
itBM
P in t
his pr
iority
selec
ted? Ye
s
No
Expla
natio
n of s
electi
on
Othe
r note
s:
Priority 4 BM
Ps‐
does not achieve
volume capture
and must b
e used
as part o
f a
treatm
ent train.
Tree
Filter Unit
XX
XX
Mod
ular Bioretention
XX
XX
Cham
bered Separator
Units
XX
XX
Centrifugal Sep
arator
Units
XX
XX
Trash Exclud
ers
XX
XX
Filte
r Inserts
XX
XX
Offset Program
N/A
N/A
N/A
Detention
X
Priority 6 BM
Ps‐
Other
Priority 4 BM
Ps‐
does not achieve
volume capture
and must b
e used
as part o
f a
treatm
ent train.
Priority 5 BM
Ps‐
does not achieve
volume capture
and must b
e used
as part o
f a
treatm
ent train.
A‐11
APPENDIX C
Low Impact Development Technical Design Manual
STORM WATER CALCULATOR
AP
PE
ND
IX C
ST
OR
M W
AT
ER
CA
LC
UL
AT
OR
Ente
r P
roje
ct
Nam
e
Ente
r A
ddre
ss
Desig
n E
ng
ineer
Ente
r ID
info
rmation
Pro
jec
t:
Ad
dre
ss
/Lo
ca
tio
n:
De
sig
ne
r:
Da
te:
Inle
t N
um
be
r/T
rib
uta
ry A
rea
/BM
P:
Ph
ysic
al T
rib
uta
ry A
rea
th
at
dra
ins t
o I
nle
t/B
MP
=1
0,0
00
ft2
Inp
ut:
Co
nd
itio
n F
acto
r =
0
.25
Me
tho
d 1
:B
ased
on
th
e t
ota
l ro
oft
op
dra
inag
e a
rea -
to b
e u
sed if
rooft
op info
rmation is k
now
n.
Inp
ut:
Ente
r am
ount
of
rooft
op a
rea t
hat
dra
in t
o d
isconnecte
d d
ow
nspouts
=
0ft
2
Ro
oft
op
Are
a F
acto
r =
0.0
0R
ooft
op A
rea F
acto
r= (
Tota
l R
ooft
op D
isconnecte
d A
rea/T
ributa
ry A
rea)
So
luti
on
:
Are
a r
ed
ucti
on
= (
Physic
al T
ributa
ry A
rea x
Conditio
nal F
acto
r x R
ooft
op A
rea F
acto
r)
(10,0
00 x
0.2
5 x
0.0
0)
=
0ft
2R
oo
fto
p D
rain
ag
e A
rea
Re
du
cti
on
Me
tho
d 2
:B
ased
on
den
sit
y (
un
its p
er
acre
) -
to b
e u
sed if
rooft
op info
rmation is u
nknow
n.
Inp
ut:
Ente
r perc
ent
of
rooft
op a
rea t
o b
e d
isconnecte
d f
rom
dow
nspouts
: 0
%
3-4
0.2
So
luti
on
:
Are
a r
ed
ucti
on
= (
Physic
al T
ributa
ry A
rea x
Conditio
nal F
acto
r x P
erc
ent
Dis
connecte
d x
Density F
acto
r)
(10,0
00 x
0.2
5 x
0.0
0 x
0.1
9)
=
0ft
2D
en
sit
y R
ed
uc
tio
n
[1]
See "
Imperv
ious A
rea D
isconnection"
Fact
Sheet
in A
ppendix
E f
or
furt
her
deta
ils.
[2]
See "
Inte
rcepto
r T
rees"
Fact
Sheet
in
Appendix
E f
or
furt
her
deta
ils a
nd s
ee "
Pla
nt
and T
ree L
ist"
in A
ppendix
G f
or
appro
ved
trees.
[3]
See "
Veg
eta
ted B
uff
er
Str
ip"
and "
Bovin
e
Terr
ace"
Fact
Sheets
in A
ppendix
E f
or
furt
her
deta
ils.
[4] T
ota
l are
a r
eductions d
ue t
o p
ollu
tion
Pre
vention M
easure
s c
annot
exceed 5
0%
of
the p
hysic
al T
ributa
ry A
rea.
[6]
Q in f
eet
of
depth
as d
efined b
y t
he "
Urb
an
Hydro
logy F
or
Sm
all
Wate
rsheds"
TR
-55
Manual.
[8]
Hydro
logic
soil
type b
ased o
f in
filtra
tion
rate
of
native s
oil
as d
efined b
y "
Urb
an
Hydro
logy F
or
Sm
all
Wate
rsheds"
TR
-55
Manual.
[5]
Per
the "
Urb
an H
ydro
logy F
or
Sm
all
Wate
rsheds"
TR
-55 m
anual.
Ru
no
ff i
s d
irecte
d a
cro
ss l
an
dscap
e;
Wid
th o
f are
a:
5' to
9'
Eit
her
Meth
od
1 (
roo
fto
p a
rea)
or
Meth
od
2 (
den
sit
y )
can
be u
sed
.
Pro
vid
ing
in
pu
t fo
r b
oth
meth
od
s
wil
l cau
se a
n e
rro
r. I
f ro
oft
op
are
a
info
rmati
on
is a
vail
ab
le,
Meth
od
1
sh
ou
ld b
e u
sed
.
Den
sit
y R
ed
ucti
on
Facto
r=[9
] C
om
posite C
N c
alc
ula
ted p
er
"Work
sheet
2 P
art
1 o
f th
e U
rban H
ydro
logy F
or
Sm
all
Wate
rsheds"
TR
-55 m
anual.
ST
OR
M W
AT
ER
C
AL
CU
LA
TO
R*
Units p
er
Acre
Se
lect d
isco
nn
ectio
n c
on
ditio
n:
NO
TE
:
[7]
Fro
m S
onom
a C
ounty
Wate
r A
gency F
lood
Contr
ol D
esig
n C
rite
ria.
NO
TE
: In
ord
er
for
this
ca
lcu
lato
r to
fu
nctio
n p
rop
erly
ma
cro
s m
us
t b
e e
na
ble
d.
Sele
ct
Density:
Dis
co
nn
ec
ted
Ro
of
Dra
ins
[1
]
En
ter
Pro
ject
Na
me
En
ter
Ad
dre
ss
De
sig
n E
ng
ine
er
Da
te
En
ter
ID in
form
atio
n
Th
is p
ort
ion
of
the
Sto
rm w
ate
r C
alc
ula
tor
is d
esig
ne
d to
acco
un
t fo
r p
ollu
tio
n p
reve
ntio
n
me
asu
res im
ple
me
nte
d o
n s
ite
. A
dd
itio
na
l in
form
atio
n a
nd
de
scri
ptio
n o
f th
ese
me
asu
res c
an
be
fou
nd
in
th
e F
act S
he
ets
in
Ap
pe
nd
ix F
an
d in
Ch
ap
ter
4 o
f th
e n
arr
ative
.
[10]
Fro
m "
Usin
g S
ite D
esig
n t
o M
eet
Develo
pm
ent
Sta
ndard
s F
or
Sto
rm w
ate
r
Qualit
y"
by t
he B
ay A
rea S
torm
wate
r
Managem
ent
Agencie
s A
ssocia
tion (
BA
SM
AA
).
*Fo
r exam
ple
on
ly,
go
to
ww
w.s
rcit
y.o
rg/s
torm
wate
rlid
for
the
late
st
vers
ion
of
the
calc
ula
tor
A1
2R
ele
ase 7
Rev.
0
8/1
6/2
012
AP
PE
ND
IX C
ST
OR
M W
AT
ER
CA
LC
UL
AT
OR
Ente
r P
roje
ct
Nam
e
Ente
r A
ddre
ss
Desig
n E
ng
ineer
Ente
r ID
info
rmation
INS
TR
UC
TIO
NS
:
Paved A
rea T
ype (
sele
ct
from
dro
p d
ow
n lis
t):
Mu
ltip
lier
=
1
Ente
r are
a o
f altern
atively
desig
ned p
aved a
rea:
0ft
2
Are
a R
ed
ucti
on
=
0ft
2
INS
TR
UC
TIO
NS
:
Num
ber
of
new
Everg
reen
Tre
es
that
qualif
y a
s inte
rcepto
r tr
ees=
0
New
Everg
reen
Tre
es
Are
a R
ed
ucti
on
du
e t
o n
ew
Everg
reen
Tre
es=
0ft
2(2
00 f
t2/t
ree)
Num
ber
of
new
Decid
uo
us T
rees
that
qualif
y a
s inte
rcepto
r tr
ees=
0N
ew
Decid
uo
us T
rees
Are
a R
ed
ucti
on
du
e t
o n
ew
Decid
uo
us T
rees=
0ft
2(1
00 f
t2/t
ree)
Ente
r sq
uare
foota
ge o
f q
ualif
yin
g e
xis
tin
g t
ree c
an
op
y =
0E
xis
tin
g T
ree C
an
op
y
All
ow
ed
red
ucti
on
cre
dit
fo
r exis
tin
g t
ree c
an
op
y=
0ft
2A
llow
ed c
redit f
or
exis
ting
tre
e c
anopy =
50 %
of
actu
al canopy s
quare
foota
ge
0ft
2=
Su
m o
f a
rea
s m
an
ag
ed
by e
ve
rgre
en
+ d
ecid
uo
us +
exis
tin
g c
an
op
y
INS
TR
UC
TIO
NS
:
Ente
r are
a d
rain
ing
to a
Buff
er
Str
ip o
r B
ovin
e T
err
ace =
0
ft2
Buff
er
Facto
r =
0
.7
So
luti
on
:
Are
a R
eduction =
(A
rea d
rain
ing
to B
uff
er
Str
ip o
r B
ovin
e T
err
ace)
x (
Buff
er
Facto
r) =
Are
a R
ed
ucti
on
=
0ft
2
Bu
ffe
r S
trip
s &
Bo
vin
e T
err
ac
es
[3
]
Ca
lcu
late
s t
he
are
a r
ed
uctio
ns c
red
it
du
e t
o in
terc
ep
tor
tre
es.
Inclu
de
s b
oth
ne
w a
nd
exis
tin
g t
ree
s.
En
ter
the
nu
mb
er
of
ne
w d
ecid
uo
us a
nd
eve
rgre
en
tre
es a
nd
th
e c
an
op
y a
rea
of
exis
tin
g t
ree
s.
Ca
lcu
late
s t
he
are
a r
ed
uctio
n c
red
it f
or
drive
wa
ys d
esig
ne
d t
o m
inim
ize
ru
no
ff.
En
ter
typ
e a
nd
are
a o
f a
lte
rna
te
de
sig
n.
Inte
rce
pto
r T
ree
s [2
]
No
t D
irectl
y-c
on
necte
d P
aved
Are
a
Ca
lcu
late
s t
he
are
a r
ed
uctio
n c
red
it
du
e t
o b
uff
er
str
ips a
nd
/or
bo
vin
e
terr
ace
s.
Ru
no
ff M
ust
be
dire
ct
to
the
se
fe
atu
res a
s s
he
et
flo
w.
En
ter
the
are
a d
rain
ing
to
th
ese
fe
atu
res.
NO
TE
:T
ota
l In
terc
ep
tor
Are
a R
ed
ucti
on
is
lim
ited
to
50%
of
the p
hysic
al
trib
uta
ry a
rea.
Pa
ve
d A
rea
Dis
co
nn
ec
tio
n [
1]
Are
a R
ed
ucti
on
=
A1
3R
ele
ase 7
Rev.
0
8/1
6/2
012
AP
PE
ND
IX C
ST
OR
M W
AT
ER
CA
LC
UL
AT
OR
Ente
r P
roje
ct
Nam
e
Ente
r A
ddre
ss
Desig
n E
ng
ineer
Ente
r ID
info
rmation
Ph
ysic
al
Tri
bu
tary
Are
a =
1
0,0
00
ft2
Tri
bu
tary
Are
a R
ed
ucti
on
du
e t
o P
oll
uti
on
Pre
ven
tio
n M
easu
res [4
] =
0ft
2
Red
uced
Tri
bu
tary
Are
a t
o b
e u
sed
fo
r C
alc
ula
tio
ns =
1
0,0
00
ft2
INS
TR
UC
TIO
NS
:
S =
1000 -
10
Where
:
CN
S
=
Pote
ntial m
axim
um
rete
ntion a
fter
runoff
(in
)[5]
CN
=C
urv
e N
um
ber
[5]
Q
=[(
P*K
)-(0
.2 *
S)]
21ft
W
here
:
[(P
*K)+
(0.8
* S
)]
12"
Q=
Runoff
depth
(ft
) [6
]
P=
0.9
2
K=
Seasonal P
recip
itation F
acto
r [7
]N
OT
E:
V=
(Q)(
Ar)
Where
:
V=
Volu
me o
f S
torm
Wate
r to
be R
eta
ined (
ft3)
Ar=
Reduced T
ributa
ry A
rea inclu
din
g c
redit f
or
Pollu
tion P
revention M
easure
s (
ft2)
Inp
ut:
(Pic
k d
ata
fro
m d
rop d
ow
n lis
ts o
r ente
r calc
ula
ted v
alu
es)
Ar =
1
0,0
00
ft2
K [7
] =
1.0
0
Sele
ct
post
develo
pm
ent
hydro
log
ic s
oil
type w
ithin
tributa
ry a
rea [8
] =
Sele
ct
post
develo
pm
ent
gro
und c
over
description [5
] =
CN
PO
ST
=
90
NO
TE
:
OR
:C
om
posite p
ost
develo
pm
ent
CN
[9] =
So
luti
on
: V
olu
me
of
sto
rm w
ate
r -
Po
st
De
ve
lop
me
nt
SP
OS
T=
in1
00
0W
here
:
90
S
PO
ST=
Post
develo
pm
ent
pote
ntial m
axim
um
rete
ntion a
fter
runoff
(in
).
QP
OS
T=
ft[(
0.9
2 *
1.0
0)-
(0.2
* 1
.11
)]²
1ft
QP
OS
T=
Q in f
eet
of
depth
as d
efined b
y t
he "
Urb
an
[(0
.92
* 1
.00
)+(0
.8 *
1.1
1)]
12
inH
ydro
logy F
or
Sm
all
Wate
rsheds"
TR
-55 M
anual.
VG
OA
L=
ft3
VG
OA
L=
VG
OA
L=
Post
Develo
pm
ent
Volu
me o
f S
torm
Wate
r to
be R
eta
ined (
ft3)
If t
he
De
sig
n G
oa
l o
f 1
00
% C
ap
ture
is
no
t a
ch
ieve
d,
10
0%
Tre
atm
en
t A
ND
Vo
lum
e C
ap
ture
m
ust
be
ach
ieve
d
an
d b
oth
pa
ge
s 4
an
d 5
of
this
ca
lcu
lato
r n
ee
d t
o b
e c
om
ple
ted
.
Th
is D
esig
n G
oa
l o
f 1
00
% C
ap
ture
is
the
id
ea
l co
nd
itio
n a
nd
if
ach
ieve
d
sa
tisfie
s a
ll re
qu
ire
me
nts
so
th
at
no
ad
ditio
na
l tr
ea
tme
nt
is r
eq
uire
d a
nd
pa
ge
s 4
an
d 5
of
this
ca
lcu
lato
r d
o n
ot
ne
ed
to
be
co
mp
lete
d.
QP
OS
T=
0.9
2 i
nch
es i
n t
he S
an
ta
Ro
sa a
rea,
based
on
lo
cal
his
tori
cal
data
.
Th
is w
ork
sh
ee
t ca
lcu
late
s th
e q
ua
ntity
of
sto
rm w
ate
r th
at n
ee
ds to
be
ad
dre
sse
d (
ca
ptu
red
an
d/o
r tr
ea
ted
) to
co
mp
ly w
ith
th
e N
PD
ES
Sto
rm W
ate
r P
erm
it issu
ed
to
th
e C
ity o
f S
an
ta R
osa
an
d C
ou
nty
of
So
no
ma
by th
e N
ort
h C
oa
st R
eg
ion
al W
ate
r Q
ua
lity C
on
tro
l B
oa
rd.
1.1
1
(0.0
22
46
)(1
0,0
00
)
X0
Revis
ed
Tri
bu
tary
Are
a d
ue
to
Po
llu
tio
n P
reve
nti
on
Me
as
ure
s
C:
0.0
5 -
0.1
5 i
n/h
r in
filt
rati
on
(tr
an
sm
issio
n)
rate
Dro
p d
ow
n L
ists
Pre
cip
itation (
in)
=
F
orm
ula
s:
Des
ign
Go
al:
1
00
% V
olu
me
Ca
ptu
re
-10
Ca
ptu
re (
infiltra
tio
n a
nd
/or
reu
se
) o
f 1
00
% o
f th
e v
olu
me
of
run
off
ge
ne
rate
d b
y th
e 8
5th
pe
rce
ntile
24
ho
ur
sto
rm e
ve
nt.
X
Resid
en
tial
- 1/8
acre
or
less (
tow
n h
ou
ses)
22
5
En
teri
ng
a c
alc
ula
ted
co
mp
os
ite
CN
will o
ve
rrid
e s
ele
cti
on
s m
ad
e
fro
m t
he
pu
ll d
ow
n m
en
u a
bo
ve
. C
alc
ula
tio
n w
ork
sh
ee
t s
ho
uld
be
us
ed
fo
r a
ll c
om
po
sit
e c
alc
ula
tio
ns
an
d in
clu
de
d w
ith
su
bm
itta
l.
SP
OS
T=
A1
4R
ele
ase 7
Rev.
0
8/1
6/2
012
AP
PE
ND
IX C
ST
OR
M W
AT
ER
CA
LC
UL
AT
OR
Ente
r P
roje
ct
Nam
e
Ente
r A
ddre
ss
Desig
n E
ng
ineer
Ente
r ID
info
rmation
Req
uir
em
en
t 1
: 1
00
% T
rea
tme
nt
INS
TR
UC
TIO
NS
:
QT
RE
AT
ME
NT=
(0.2
in/h
r)(A
)(C
PO
ST)(
K)
cfs
Where
:
QT
RE
AT
ME
NT=
Desig
n f
low
rate
req
uired t
o b
e t
reate
d (
cfs
)
CP
OS
T =
Rational m
eth
od r
unoff
coeff
icie
nt
for
the d
evelo
ped c
onditio
n [
10]
Ar =
Reduced T
ributa
ry A
rea inclu
din
g c
redit f
or
Pollu
tion P
revention M
easure
s (
ft2)
K =
Seasonal P
recip
itation F
acto
r [7]
Inp
ut:
Ar =
10
,00
0ft
2 =
0A
cre
s
CP
OS
T [1
0] =
0.0
K [7
] =
1.0
So
luti
on
:
QT
RE
AT
ME
NT=
cfs
QT
RE
AT
ME
NT=
(0.2
)(0
.23
)(0
.00
)(1
.00
)
If t
he
De
sig
n G
oa
l o
f 1
00
% C
ap
ture
on
pa
ge
3 o
f th
is c
alc
ula
tor
is n
ot
ach
ieve
d;
the
n R
eq
uire
me
nt
1-1
00
%
Tre
atm
en
t, t
his
pa
ge
of
the
ca
lcu
lato
r,
AN
D R
eq
uire
me
nt
2-
Vo
lum
e C
ap
ture
,
pa
ge
5 o
f th
e c
alc
ula
tor,
mu
st
be
ach
ieve
d.
0
Tre
atm
en
t o
f 1
00
% o
f th
e f
low
ge
ne
rate
d b
y 8
5th
pe
rce
ntile
24
ho
ur
me
an
an
nu
al ra
in e
ve
nt (0
.2 in
/hr)
.
F
orm
ula
:
A1
5R
ele
ase 7
Rev.
0
8/1
6/2
012
AP
PE
ND
IX C
ST
OR
M W
AT
ER
CA
LC
UL
AT
OR
Ente
r P
roje
ct
Nam
e
Ente
r A
ddre
ss
Desig
n E
ng
ineer
Ente
r ID
info
rmation
Req
uir
em
en
t 2
: D
elt
a V
olu
me
Ca
ptu
reIN
ST
RU
CT
ION
S:
S =
Where
:
CN
S
=
Pote
ntial m
axim
um
rete
ntion a
fter
runoff
(in
)[5]
CN
=C
urv
e N
um
ber
[5]
Q=
[(P
*K)-
(0.2
* S
)]2
1ft
W
here
:
[(P
*K)+
(0.8
* S
)]
12in
Q=
Runoff
depth
(ft
) [6
]
P=
0.9
2
K=
Seasonal P
recip
itation F
acto
r [7
]
V=
(Q)(
Ar)
Where
:N
OT
E:
V=
Volu
me o
f S
torm
Wate
r to
be R
eta
ined (
ft3)
Ar=
Reduced T
ributa
ry A
rea inclu
din
g c
redit f
or
Pollu
tion P
revention M
easure
s (
ft2)
Inp
ut:
(Pic
k d
ata
fro
m d
rop d
ow
n lis
ts o
r ente
r calc
ula
ted v
alu
es)
Ar =
1
0,0
00
ft2
K [
7] =
1
.0
Sele
ct
hydro
log
ic s
oil
type w
ithin
tributa
ry a
rea
[8] =
Sele
ct
pre
develo
pm
ent
gro
und c
over
description [5
] =
Sele
ct
post
develo
pm
ent
gro
und c
over
description [5
] =
CN
PR
E =
7
9
CN
PO
ST
=
90
OR
So
luti
on
:
Pre
De
ve
lop
me
nt
Sto
rm W
ate
r R
un
off
Vo
lum
e
SP
RE=
inS
PR
E=
10
00
Where
:
79
S
PR
E=
Pre
develo
pm
ent
pote
ntial m
axim
um
rete
ntion a
fter
runoff
(in
).
QP
RE=
ft1
ft
QP
RE=
Q in f
eet
of
depth
as d
efined b
y t
he "
Urb
an
12
inH
ydro
logy F
or
Sm
all
Wate
rsheds"
TR
-55 M
anual.
VP
RE=
ft3
VP
RE=
VP
RE=
Pre
Develo
pm
ent
Volu
me o
f S
torm
Wate
r G
enera
ted (
ft3)
Po
st
De
ve
lop
me
nt
Sto
rm W
ate
r R
un
off
Vo
lum
e
SP
OS
T=
inS
PO
ST=
10
00
Where
:
90
S
PO
ST=
Post
develo
pm
ent
pote
ntial m
axim
um
rete
ntion a
fter
runoff
(in
).
QP
OS
T=
ftQ
PO
ST=
1ft
QP
OS
T=
Q in f
eet
of
depth
as d
efined b
y t
he "
Urb
an
12
inH
ydro
logy F
or
Sm
all
Wate
rsheds"
TR
-55 M
anual.
VP
OS
T=
ft3
VP
OS
T=
(0.0
22
46
)(1
0,0
00
)V
PO
ST=
Post
Develo
pm
ent
Volu
me o
f S
torm
Wate
r G
enera
ted (
ft3)
So
luti
on
:V
olu
me
Ca
ptu
re R
eq
uir
em
en
t
Incre
ase
in
vo
lum
e o
f sto
rm w
ate
r th
at m
ust b
e r
eta
ine
d o
nsite
(m
ay b
e in
filtra
ted
or
reu
se
d).
(VP
OS
T-V
PR
E)
(22
4.6
0)
- (4
1.2
0)
Where
:
VD
EL
TA=
ft3
The incre
ase in v
olu
me o
f sto
rm w
ate
r g
enera
ted b
y t
he 8
5th
perc
entile
24 h
our
sto
rm e
vent
due t
o d
evelo
pm
ent
that
must
be
reta
ined o
nsite (
may b
e infiltra
ted o
r re
used).
If t
he
De
sig
n G
oa
l o
f 1
00
% C
ap
ture
on
pa
ge
3 o
f th
is c
alc
ula
tor
is n
ot
ach
ieve
d;
the
n R
eq
uire
me
nt
1-1
00
%
Tre
atm
en
t, p
ag
e 4
of
the
ca
lcu
lato
r,
AN
D R
eq
uire
me
nt
2-
Vo
lum
e C
ap
ture
,
this
pa
ge
of
the
ca
lcu
lato
r, m
us
t b
e
ach
ieve
d.
If t
he
am
ou
nt
of
vo
lum
e g
en
era
ted
aft
er
de
ve
lop
me
nt
is le
ss t
ha
n o
r
eq
ua
l to
th
at
ge
ne
rate
d b
efo
re
de
ve
lop
me
nt,
Re
qu
ire
me
nt
2-V
olu
me
Ca
ptu
re is n
ot
req
uire
d.
(C
PO
ST
≤ C
PR
E o
r C
NP
OS
T ≤
CN
PR
E )
41
QP
RE=
-10
C:
0.0
5 -
0.1
5 i
n/h
r in
filt
rati
on
(tr
an
sm
issio
n)
rate
X
X
-10
0
22
5
Com
posite P
ost
develo
pm
ent
CN
[9] =
[(0
.92
*1.0
0)-
(0.2
* 1
.11
)]²
De
lta
Vo
lum
e C
ap
ture
=
0.9
2 inches in t
he S
anta
Rosa
are
a,
based o
n local his
torical
data
.
3
Delta V
olu
me C
aptu
re=
Com
posite P
redevelo
pm
ent
CN
[9] =
[(0
.92
*1.0
0)+
(0.8
* 1
.11
)]X
[(0
.92
*1.0
0)-
(0.2
* 2
.66
)]²
1000 -
10
0 1
(0.0
04
12
)(1
0,0
00
)
18
3
No
in
cre
ase
in
vo
lum
e o
f ru
no
ff le
avin
g th
e s
ite
du
e to
de
ve
lop
me
nt fo
r th
e 8
5th
pe
rce
ntile
24
ho
ur
sto
rm e
ve
nt.
F
orm
ula
s:
De
lta
Vo
lum
e C
ap
ture
=
Pre
cip
itation (
in)
=
Dro
p d
ow
n L
ists
Resid
en
tial
- 1/8
acre
or
less (
tow
n h
ou
ses)
Resid
en
tial
- 1 a
cre
lo
ts
[(0
.92
*1.0
0)+
(0.8
* 2
.66
)]
A1
6R
ele
ase 7
Rev.
0
8/1
6/2
012
AP
PE
ND
IX C
ST
OR
M W
AT
ER
CA
LC
UL
AT
OR
Ente
r P
roje
ct
Nam
e
Ente
r A
ddre
ss
Desig
n E
ng
ineer
Ente
r ID
info
rmation
INS
TR
UC
TIO
NS
:
LID
BM
P S
izin
g T
oo
l: 1
00
% V
olu
me
Ca
ptu
re G
oa
l; V
GO
AL
NO
TE
:
86
4ft
3W
here
:
VLID
GO
AL=
Req
uired v
olu
me o
f soil
in L
ID B
MP
.
80
0ft
2A
LID
GO
AL =
Footp
rint
of
LID
BM
P a
rea f
or
a g
iven d
epth
(belo
w p
erf
ora
ted p
ipe if
pre
sent)
.
VG
OA
L =
22
5ft
3
Where
:
Pe
rce
nt o
f G
oa
l A
ch
ieve
d =
(D
)(A
LID
GO
AL)
P=
Poro
sity
(
ente
r as a
decim
al)
VLID
GO
AL
D=
Depth
belo
w p
erf
ora
ted p
ipe if
pre
sent
(in d
ecim
al fe
et)
W=
Wid
th
(in d
ecim
al fe
et)
L=
Leng
th
(
in d
ecim
al fe
et)
Inp
ut:
P =
0.3
as a
decim
al
D =
3.5
ftB
elo
w p
erf
ora
ted p
ipe if
pre
sent
W =
8.0
ft
L =
10
0.0
ft
So
luti
on
:
Pe
rce
nt
of
Go
al A
ch
ieve
d =
3
24
%=
[(3
.5 x
80
0)
/ 8
64
] x
10
0
INS
TR
UC
TIO
NS
:
LID
BM
P S
izin
g T
oo
l D
elt
a V
olu
me
Ca
ptu
re R
eq
uir
em
en
t:
VD
EL
TA
NO
TE
:
70
5ft
3W
here
:
VLID
DE
LT
A=
Req
uired v
olu
me o
f soil
in L
ID B
MP
0ft
2A
LID
DE
LT
A =
Footp
rint
of
LID
BM
P a
rea f
or
a g
iven d
epth
(belo
w p
erf
ora
ted p
ipe if
pre
sent)
.
VD
EL
TA=
18
3ft
3
Where
:
(D)(
ALID
DE
LT
A)
P=
Poro
sity
(
ente
r as a
decim
al)
VLID
DE
LT
AD
=D
epth
belo
w p
erf
ora
ted p
ipe if
pre
sent
(in d
ecim
al fe
et)
W=
Wid
th
(in d
ecim
al fe
et)
L=
Leng
th
(
in d
ecim
al fe
et)
Inp
ut:
P =
0.3
as a
decim
al
D =
0.0
ftB
elo
w p
erf
ora
ted p
ipe if
pre
sent
W =
0.0
ft
L =
0.0
ft
So
luti
on
:
Pe
rce
nt
of
Re
qu
ire
me
nt
Ac
hie
ve
d =
0
%=
[(0
.0 x
0)
/ 7
05
] x
10
0
Th
e D
elta
Vo
lum
e C
ap
ture
siz
ing
to
ol
he
lps t
he
de
sig
ne
r a
pp
rop
ria
tely
siz
e a
LID
BM
P t
o a
ch
ieve
th
e d
esig
n
req
uire
me
nt
of
the
de
lta
vo
lum
e
ca
ptu
re.
En
ter
the
pe
rce
nt
of
po
rosity
of
the
sp
ecifie
d s
oil
an
d d
ep
th b
elo
w
pe
rfo
rate
d p
ipe
( if
pre
se
nt)
. T
he
wid
th
an
d le
ng
th e
ntr
ies w
ill n
ee
d t
o b
e
inte
ractive
ly a
dju
ste
d u
ntil "P
erc
en
t o
f
Re
qu
ire
me
nt
ach
ieve
d"
rea
ch
es
10
0%
.
Th
e 1
00
% v
olu
me
ca
ptu
re s
izin
g t
oo
l
he
lps t
he
de
sig
ne
r a
pp
rop
ria
tely
siz
e a
LID
BM
P t
o a
ch
ieve
th
e d
esig
n g
oa
l o
f
10
0%
vo
lum
e c
ap
ture
of
the
po
st
de
ve
lop
me
nt
co
nd
itio
n.
En
ter
the
pe
rce
nt
po
rosity o
f th
e s
pe
cifie
d s
oil
an
d d
ep
th b
elo
w p
erf
ora
ted
pip
e (
if
pre
se
nt)
. T
he
wid
th a
nd
le
ng
th e
ntr
ies
will
ne
ed
to
be
in
tera
ctive
ly a
dju
ste
d
un
til "P
erc
en
t o
f G
oa
l" e
qu
als
10
0%
.
Pe
rce
nt o
f R
eq
uir
em
en
t
Ach
ieve
d=
ALID
DE
LT
A=
(W)(
L)
=
VLID
GO
AL=
((V
GO
AL))
/(P
) =
F
orm
ula
s:
LID
Siz
ing
To
ol
on
ly a
pp
licab
le f
or
vo
lum
e
based
BM
Ps.
No
t re
qu
ired
if
sit
e r
eq
uir
es
treatm
en
t o
nly
.
x 1
00
ALID
GO
AL=
(W)(
L)
=
F
orm
ula
s:
VLID
DE
LT
A=
((V
DE
LT
A))
/(P
) =
x 1
00
LID
Siz
ing
To
ol
on
ly a
pp
licab
le f
or
vo
lum
e
based
BM
Ps.
No
t re
qu
ired
if
sit
e r
eq
uir
es
treatm
en
t o
nly
.
A1
7R
ele
ase 7
Rev.
0
8/1
6/2
012
APPENDIX D
City of Santa Rosa and County of Sonoma
PRELIMINARY SUSMP SUBMITTAL GUIDE
Preliminary SUSMP Submittal Guide
A‐18 City of Santa Rosa and County of Sonoma
Project Information:
Applicant Name (owner or developer)
Mailing Address
City/State/Zip
Phone/Email/Fax
Project Name
Site Address
City/State/Zip
Permit # (s)
Engineer Name
Mailing Address
City/State/Zip
Phone/Email/Fax
Type of Application/Project:
Subdivision Grading Permit Building Permit Design Review Use Permit Other ___________
What your Preliminary Plan must include:
Narrative:
Project Description
□ Description of proposed project type, location, and any specific uses or features. □ Description of any sensitive features (creeks, wetlands, trees, etc) and weather they are going to be preserved,
removed or altered. □ Description of the existing site. □ Description of how this project triggers these requirements (impervious area, CALGreen, 401 Permit, etc).
Preliminary SUSMP Submittal Guide
A‐19 Low Impact Development Technical Design Manual
Pollution Prevention and Credits
□ Description of all proposed pollution prevention measures (street sweeping, covered trash enclosures, indoor uses, etc).
□ Description of all credits utilized (Interceptor Trees, Impervious Area Disconnection, and/or Alternative Driveway Design).
□ Summary of tributary area reduction due to credits.
Type of BMPs proposed
□ Description of the types of BMPs selected including priority group that each is in. □ Description of level of treatment and volume capture achieved (if 100% Capture is achieved treatment is not
required).
Maintenance
□ Description of maintenance for each type of BMP. □ Description of funding mechanism. □ Designation of Responsible Party.
EXHIBITS AND ATTACHMENTS
Completed BMP Selection Table
□ Completed BMP Selection Table for each tributary area including explanation for each Priority not used.
Proposed SUSMP Exhibit
□ Exhibit should include: street names, property lines, storm drainage system, waterways, title block, scale, and north arrow.
□ Tributary areas shown for all inlets (including offsite drainage areas). □ C value for each tributary area. □ Soil Type of existing site. □ New or replaced impervious area. □ All inlets shown (including identifier). □ All interceptor trees shown. □ All proposed BMPs shown.
Preliminary SUSMP Submittal Guide
A‐20 City of Santa Rosa and County of Sonoma
Existing Condition Exhibit
Not necessary if no impervious area existed on the undeveloped site or if the Design Goal of 100% Volume Capture is achieved.
□ Exhibit should include: street names, property lines, proposed storm drainage system, waterways, title block, scale, and north arrow.
□ Soil Type of existing site. □ Proposed tributary areas shown for all proposed inlets (including offsite drainage areas).Existing impervious
areas. □ Existing impervious area.
BMP Details:
□ Preliminary detail for each type of BMP selected‐ provide a preliminary 8.5”x11” detail for each BMP type or include on submitted drawings. These can be taken straight from the Fact Sheets if no significant changes are proposed.
ON PLANS □ Show all applicable elements of the selected BMPs on the appropriate sheets.
CALCULATIONS
□ Preliminary calculations; both volume and treatment, using the “storm water calculator” for each inlet.
APPENDIX E
Low Impact Development Technical Design Manual
BMP FACT SHEETS, DETAILS AND INSPECTION CHECKLISTS
A‐21
Living Also know
DESCRIPT Living roofunction natural pare exem ADVANT
• Li• P• U• U• P• R• P• R
City of Sant
Roof w as: Green
TION
ofs are roofsas a soil andphysical, biolmpt from the
TAGES
iving roofs arovides wat
Used in urbanUsed on sloperovides habeduces buildrovides noiseduces heat
FACT
ta Rosa and C
Roof, Roof G
s that are end plant‐baselogical, and ce Volume Ca
re excludeder quality tren areas wheed sites. itat for birdsding heatingse reductiont island effec
SHEET
County of Son
Garden, and
ntirely or pard filtration fchemical trepture requir
from Volumeatment. re space is li
s and attractg and cooling. ct.
T‐ LIVI
oma
d Vegetated
rtially coverefeature that eatment prorement.
me Capture c
imited.
ts pollinatorg costs.
NG RO
Roof
ed with vegeremoves pocesses. Area
calculations.
s like butter
OOF
etation and sollutants throas treated w
rflies and bee
soils. Living ough a varieith a living r
es.
roofs ety of oof
FACT SHEET‐ LIVING ROOF
A‐22 Low Impact Development Technical Design Manual
LIMITATIONS
• Need to be integrated into the overall building and structural design. • Overflow requirements need to be considered in design. • Building orientation and shading needs to be considered in design. • Plants must be selected for shallow soil layer and fast draining soils. • Can only be installed on relatively flat roofs.
KEY DESIGN FEATURES
• All vegetated roofs are assembled in layers. The top layer includes the engineered soils and the plants. The soil is a lightweight mix that includes some organic material. Under the soil is a drainage layer that includes filter fabric to keep the soil in place and a core material that stores water and allows it to drain off the roof surface. Next is the root barrier, which prevents the roots from puncturing the waterproof membrane that lies below it, and finally there is the roof structure.
• Include plants suited to the unique shallow soil conditions and design to achieve ___% cover.
• Design for high flow as well as the water quality design storm. • Underdrain or drainage system required. • Designed to prevent standing water. All surface water must drain within 72 hours to
prevent mosquito breeding. • Select non‐floatable surface mulching material to prevent clogging of downstream
inlets. • Building must be designed for the added weight of the living roof and all retained storm
water. • Seismic analysis may be necessary due to increased weight. • Irrigation may be necessary for plant establishment and extended dry periods.
SIZING DESIGN‐ GOAL AND REQUIREMENTS
• Water Quality Treatment of 100% of the flow generated by the 85th percentile 24 hour storm event, as calculated using the Rational Method and a known intensity of 0.20 inches per hour.
• Living roofs are excluded from Volume Capture calculations. • All calculations shall be completed using the “Storm Water Calculator” available at
www.srcity.org/stormwaterLID
FACT SHEET‐ LIVING ROOF
A‐23 City of Santa Rosa and County of Sonoma
INSPECTION AND MAINTENANCE REQUIREMENTS
A maintenance plan shall be provided with the Final SUSMP. The maintenance plan shall include; recommended maintenance practices, identify the parties responsible for maintenance and upkeep, specify the funding source for ongoing maintenance with provisions for full replacement when necessary, and provide site specific inspection checklist. At a minimum inspection and maintenance shall include the following: • Drainage features should be inspected and cleaned as necessary to remove any
obstructions. • Irrigation, if present, should be routinely inspected to ensure plant establishment and
survival. • Plants should be pruned, weeds pulled, and dead plants replaced as needed. • Eroded areas should be repaired as needed
FACT SHEET‐ RAINWATER HARVESTING
A‐24 City of Santa Rosa and County of Sonoma
RAINWATER HARVESTING Also know as: Rain Barrel, Cistern, and Rainwater Collection
DESCRIPTION Rainwater harvesting is the practice of collecting and using rainwater from impervious surfaces such as roofs and patios. Rain barrels, or cisterns, are containers or tanks, designed to capture rainwater runoff from roofs later used for irrigation. Rain barrels are inexpensive, easy to install and maintain, and well suited for small‐scale residential sites. Cisterns are larger than rain barrels and can be installed above or below ground depending upon design requirements and site conditions. ADVANTAGES
• Can provide volume capture. • Can be used as part of a treatment train with other BMPs. • Low maintenance requirements (for above ground installations). • Good for sites where infiltration is limited. • Provides another source for irrigation water. • Prioritized as a “Universal LID feature.”
LIMITATIONS
• Limited storage capacity. • Does not provide water quality treatment. • May require infrastructure (pumps or valves) to use stored water. • Inadequate maintenance can result in mosquito breeding and/or algae production. • May require building permits. Contact the governing agency for requirements.
FACT SHEET‐ RAINWATER HARVESTING
A‐25 Low Impact Development Technical Design Manual
KEY DESIGN FEATURES
• Roof surfaces shall not include copper or materials treated with fungicides or herbicides. • Gutters must be fully screened and installed at continuous grade. • Storage containers, tank liners, and tank coatings must be listed as food grade, or be
approved for potable water storage. • Containers must be opaque, water tight, vented, completely covered and screened. • Screen all openings. • For above‐ground systems, spigot and/or hose bib for
drawing water must be at least 2 inches from the bottom and must be labeled “NONPOTABLE”.
• Overflow device must be equal in size to the total of all inlets and must lead to an approved discharge location with approved air gap.
• First flush diverter must be automatic self‐draining with a clean out.
• Safety labels (non‐potable, vector hazard, drowning hazard icons).
• Outdoor spigots must have an atmospheric vacuum breaker attached.
• Prior to installation, roofs must be cleaned, and downspouts disconnected from the storm drain system.
• All municipal water service lines to facilities with rainwater harvesting systems require the installation of an approved backflow prevention device. This condition may be met if the backflow prevention was installed as part of the fire sprinkler system.
• Not permitted within the front yard setback. • Tanks up to 8 feet in height are permitted within the rear and side yard setbacks. • Tanks in excess of 8 feet in height, shall be subject to the same setbacks as a
detached residential accessory structure. • Both rain barrels and above‐ground cisterns must be sited in a stable, flat area. Rain
barrels and cisterns may not block the path of travel for fire safety access. • Overflow locations, which can include rain gardens, additional rain barrels or cisterns, or
a discharge point to the storm drain system, must be designed to both direct outflow away from building foundations and prevent nuisance flows to adjacent properties.
• Overflow may not discharge water across a public right‐of‐way. • Tanks should be placed in a cool or shaded area to avoid algal growth. • Regular use of the water stored in systems between rain events is critical to ensure that
storage is available for the next storm event.
FACT SHEET‐ RAINWATER HARVESTING
A‐26 City of Santa Rosa and County of Sonoma
SIZING DESIGN GOALS AND REQUIREMENTS
• The design goal for rain water harvesting is to capture 100% of the runoff volume
generated by the 85th percentile 24 hour storm event. 100% volume capture has been established as the ideal condition. If achieved, all requirements are satisfied and no additional treatment is required. This is a retention requirement.
• If the design goal is not achievable, then the rain water harvesting sizing requirement is: • Volume Capture of the increase in volume of storm water due to development
generated by the 85th percentile 24 hour storm event. • All calculations shall be completed using the “Storm Water Calculator” available at
www.srcity.org/stormwaterLID. INSPECTION AND MAINTENANCE REQUIREMENTS A maintenance plan shall be provided with the Final SUSMP. The maintenance plan shall include recommended maintenance practices, state the parties responsible for maintenance and upkeep, specify the funding source for ongoing maintenance with provisions for full replacement when necessary and provide site specific inspection checklist. At a minimum maintenance shall include the following:
• Inspect twice annually to confirm that all the parts are operable and not leaking. • Debris and clear all screens to prevent mosquitoes and other vectors from breeding. • Clean tanks annually with a non‐toxic cleaner, such as vinegar and dispose of wash
water in a sink, bathtub or sewer cleanout. • Test all backflow prevention assemblies annually by the system owner using an
approved certified tester. • Regular use of the water stored in systems between rain events is critical to ensure that
storage is available for the next storm event. • Clear roof gutter screens.
RAINWATER HARV
ESTING‐ INSPEC
TION CHEC
KLIST
A‐27
City of Santa Rosa and Co
unty of Son
oma
Rainwater Harvesting
Date of Inspectio
n:
Inspectio
n and Mainten
ance Che
cklist
Inspector(s):
(aka: R
ain Ba
rrel, Cistern, R
ainw
ater Collection)
BMP ID #:
Prop
erty Owne
r:
Locatio
n Descriptio
n:
Type
of Inspe
ction: � Pre‐rainy
Season (PRS) � Rainy
Season (RS) � After‐rainy
Season (ARS)
This Inspectio
n an
d Maintenan
ce Checklist is to be used
in con
junctio
n with
its correspo
nding LID Factsheet and
Maintenan
ce Plan. Please review
these do
cuments before performing the fie
ld inspectio
n
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance
completed
and
if neede
d mainten
ance was
not con
ducted
, note whe
n it will be do
ne)
Drainage
RS
Is th
ere standing
or po
oling of
water after 3 days of dry
weather aroun
d the storage
tank(s) area?
•
Regrade over flow
drainage area.
• Re
positio
n splash block /dissipater.
• Ch
eck for leaks from
storage ta
nk(s).
RS
Is th
ere excessive
splashing/spray from
the
overflo
w outlet?
•
Repo
sitio
n splash block or dissipater
to red
uce or elim
inate splash/spray.
RS
Are th
e ho
use/bu
ilding gutters
overflo
wing du
ring
a rain
even
t?
•
Check gutter dow
n spou
t and
gutter
for ob
structions.
• Ch
eck storage tank(s) inlet screens fo
r blockage.
• Ch
eck storage tank(s) o
utlet(s) fo
r blockage.
RS
Are th
e storage tank(s) o
ver
flowing?
• Ch
eck storage tank(s) o
utlet(s) fo
r blockage.
RAINWATER HARV
ESTING‐ INSPEC
TION CHEC
KLIST
A‐28
Low Im
pact Develop
men
t Techn
ical Design Manual
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Erosion
RS
ARS
Is th
ere eviden
ce of u
nder
cutting or washo
uts arou
nd
storage tank(s)?
• Re
positio
n splash block(s) o
r dissipater(s).
• Fill in erode
d areas and regrade.
• Re
pair any
leaks or overflows from
storage tank(s).
PRS
RS
ARS
Is th
ere accumulation of
sedimen
t, deb
ris in th
e storage
tank(s)?
• Re
move sedimen
t and
che
ck inlet
and gutter screens.
• Ve
rify th
at th
e lid
of the
storage
tank
is secure.
RS
ARS
Is th
ere un
der cutting or
washo
uts arou
nd th
e ou
tlet
splash block(s)?
• Re
positio
n splash block(s) o
r dissipater(s).
• Fill in erode
d areas and regrade.
RAINWATER HARV
ESTING‐ INSPEC
TION CHEC
KLIST
A‐29
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Vegetation
PRS
RS
ARS
Is th
e vegetatio
n clogging
the
outle
t areas?
• Trim
and
/or remove the excess
vegetatio
n arou
nd th
e ou
tlet flow
areas.
PRS
RS
ARS
Is th
e mulch/gravel spread
even
ly th
rougho
ut th
e storage
tank(s) area?
• Re
distribu
te and
add
add
ition
al
mulch/gravel if n
eede
d.
• Re
grade storage area.
PRS
RS
ARS
Are th
ere de
ad or dry
plants/w
eeds?
• Re
move de
ad and
/or dry
vegetatio
n. Rep
lace as ne
eded
. • Re
move or trim
any
vegetation that
is causing
a trip or access hazard.
RAINWATER HARV
ESTING‐ INSPEC
TION CHEC
KLIST
A‐30
Low Im
pact Develop
men
t Techn
ical Design Manual
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
BMP General
PRS
RS
ARS
Is th
ere de
bris/trash in th
e area?
• Re
move all trash/deb
ris.
PRS
RS
ARS
Is th
e surrou
nding area m
arked
with
Graffiti?
• Re
move all graffiti from
the area.
PRS
RS
ARS
Are th
ere missing
or d
isturbed
aesthe
tics features?
• Re
place and/or rep
osition
aesthetics
features to
original placemen
t.
• Placem
ent sho
uld no
t disrupt flow
characteristics/de
sign.
PRS
RS
ARS
Are th
e vector con
trol/prevention
devices in place and
functio
nal?
• Re
place or rep
air all dam
age
compo
nents.
• Co
ntact v
ector con
trol if problem
pe
rsist.
PRS
RS
ARS
Is th
e irrigatio
n system
functio
nal?
• Re
paired
any
broken compo
nents.
PRS
RS
ARS
Is th
e Ba
ckflo
wop
eration/mainten
ance log
curren
t?
(if installed)
• Test all backflo
w prevention
assemblies annu
ally by the system
ow
ner using an
app
roved certified
tester.
PR
S RS
ARS
Is th
ere algae or other growth in
the storage containe
rs?
• Clean tank(s) w
ith non
‐toxic cleaner.
FACT SHEET‐ INTERCEPTOR TREES
A‐31 City of Santa Rosa and County of Sonoma
INTERCEPTOR TREES Also known as: Tree Credits
DESCRIPTION Interceptor trees are new trees, or existing trees that are located within 25’ of impervious areas. Trees intercept rain water on their leaves and branches, allowing rain water to evaporate or run down the branches and trunk of the tree where it readily infiltrates into the soil. Tree roots also increase infiltration. Trees also provide shade over impervious surfaces which reduce peak flow in streams and provide shade which reduces the “heat island” effects of urban areas. Interceptor tree credits are calculated into the site design by reducing the amount of tributary area that must be used to calculate treatment and volume capture. New deciduous trees provide a credit of 100 ft², new evergreen trees provide 200 ft², and existing trees provide one half of the existing canopy. Only tree that overhang impervious areas or are within 25’ of impervious areas can qualify as interceptor trees. The total area reduction credit due to the use of interceptor trees cannot exceed one half of the total physical tributary area. All interceptor tree credit calculations should be completed with the Credit Calculator in Appendix C.
FACT SHEET‐ INTERCEPTOR TREES
A‐32 Low Impact Development Technical Design Manual
For example, if a project has 10,000 ft2 of impervious area and plants 3 new deciduous interceptor trees and 2 evergreen interceptor trees, the area entered into the Storm Water Calculator to determine treatment and volume capture would be 10,000 ft2 ‐(3*100 ft2)‐(2*200 ft2) = 9,300 ft2. If the project also kept an existing tree with a 100 ft2 canopy, the tributary area could be reduced by an additional 50 ft2. ADVANTAGES
• Reduces the amount of pollutants entering the storm drain system. • Can reduce size of downstream storm water quality treatment measure(s) by reducing
the volume required to be treated. • Provides shade to cool pavement and reduces surface runoff temperatures. • Aids in removal of air pollutants and noise reduction. • Trees required by the permitting agency may be counted as interceptor trees. • Establishes habitat for birds and other pollinators like butterflies and bees.
KEY DESIGN FEATURES
• Appropriate new trees must be selected from the approved tree list. See Appendix G. • Existing trees must be adequately protected during construction. • Only tree that overhang impervious areas or are within 25’ of impervious areas can
qualify as interceptor trees. INSPECTION AND MAINTENANCE REQUIREMENTS A maintenance plan shall be provided with the Final SUSMP. The maintenance plan shall include recommended maintenance practices, state the parties responsible for maintenance and upkeep, specify the funding source for ongoing maintenance with provisions for full replacement when necessary, and provide site specific inspection checklist.
At a minimum inspection and maintenance shall include the following:
• Annual inspection prior to the rainy season. • Annual proper watering and application of mulch. • Routine pruning and weeding as needed. • Replacement of trees as needed.
FACT SHEET‐ VEGETATED BUFFER STRIP
A‐33 City of Santa Rosa and County of Sonoma
VEGETATED BUFFER STRIP Also know as: Filter Strip, Grassed Filter DESCRIPTION
Vegetated buffer strips are sloping planted areas designed to allow storm water to naturally infiltrate sheet flow from adjacent impervious surfaces. Buffer strips slope away from the impervious surface and are most often vegetated with low lying ground cover. Buffer strips function by slowing storm water runoff and allowing sediment and other pollutants to settle and infiltrate. Vegetated buffer strips are well‐suited to addressing runoff from roads and highways, roof downspouts, and parking lots.
ADVANTAGES
• Provides a tributary area reduction. Calculations to be completed using the Pollution Prevention Credit Calculator in Appendix C.
• Enhances water quality of downstream water bodies through natural processes. • Aesthetically pleasing. • Can establish habitat for birds and other pollinators like butterflies and bees. • Require minimal maintenance (typically erosion prevention, mowing, and/or pruning).
FACT SHEET‐ VEGETATED BUFFER STRIP
A‐34 Low Impact Development Technical Design Manual
LIMITATIONS
• Requires sufficient area. • Ultimate storm water collection needs to be considered in design. • May not be appropriate for industrial sites or locations where chemical spills may occur. • A thick vegetative cover is needed for these practices to function properly. • Prohibited in areas of known contamination. If soil and/or groundwater contamination is present on the site or within a 100’ radius of the proposed location, the North Coast Regional Water Quality Control Board review and approval is required. • Not appropriate for sites with a high risk of landslides or other geotechnical concerns. Slope stability shall be determined by a licensed Geotechnical Engineer.
KEY DESIGN FEATURES • Slopes should not exceed 15%. • Slope shall be at least 2%. • Minimum length (in direction of flow) shall be 15 feet. • Strip shall be sized as long as the site will reasonably allow. • Vegetation whose growing season corresponds to the wet season is preferred (see
Appendix A for list of locally suitable plant species). • Strip shall be free of gullies or rills. INSPECTION AND MAINTENANCE REQUIREMENTS A maintenance plan shall be provided with the Final SUSMP. The maintenance plan shall include; recommended maintenance practices, parties responsible for maintenance and upkeep, specify the funding source for ongoing maintenance with provisions for full replacement when necessary, and provide site specific inspection checklist. At a minimum inspection and maintenance shall include the following:
• Mow as needed and irrigate during dry weather to the extent necessary to keep vegetation alive. Remove obstructions and trash from vegetated buffer strip.
• Pesticides and fertilizers shall not be used in the vegetated buffer strip. • Where mowing is required, grass height shall be maintained between 3” and 6”.
Vegetated buffer strips shall be inspected and maintained twice a year to review:
• Condition of vegetation. • Obstructions and trash. • Ponded flow is drained within 72 hours after a rainfall event. • If ponding is observed, grading will be required to restore positive drainage.
VEG
ETATED BUFFER
STR
IP‐ C
HEC
KLIST
A‐35
City of Santa Rosa and Co
unty of Son
oma
Vegetated
Buffer Strip
Date of Inspectio
n:
Inspectio
n and Mainten
ance Che
cklist
Inspector(s):
(aka
: Filter Strip, G
rassed
Filter)
BM
P ID #:
Prop
erty Owne
r:
Locatio
n Descriptio
n:
Type
of Inspe
ction: � Pre‐rainy
Season (PRS) � Rainy
Season (RS) � After‐rainy
Season (ARS)
This Inspectio
n an
d Maintenan
ce Checklist is to be used
in con
junctio
n with
its correspo
nding LID Factsheet and
Maintenan
ce Plan. Please review
these do
cuments before performing the fie
ld inspectio
n.
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance
completed
and
if neede
d mainten
ance was
not con
ducted
, note whe
n it will be do
ne)
Drainage
RS
Is th
ere standing
or po
oling of
water after 3 days of dry
weather?
•
Remove any ob
struction in th
e bu
ffer
strip and/or regrade
to restore
positiv
e drainage.
• Clean and/or rem
ove any ob
structions
in and
aroun
d the storm drain inlet.
PRS
RS
ARS
Is th
ere po
or drainage du
ring
a
high
intensity
storm
event?
•
Clean and/or rem
ove any ob
structions
in and
aroun
d the storm drain inlet.
RS
Is th
e flo
w into th
e bu
ffer strip
even
and
uniform
? •
Remove any ob
struction preven
ting a
unifo
rm flow
into th
e bu
ffer strip.
VEG
ETATED BUFFER
STR
IP‐ C
HEC
KLIST
A‐36
Low Im
pact Develop
men
t Techn
ical Design Manual
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Erosion
RS
ARS
Is th
ere eviden
ce of u
nder
cutting or washo
uts alon
g the
impe
rvious surfaces of th
e bu
ffer strip?
• Fill in erode
d areas and regrade.
RS
ARS
Is th
ere channe
lization (gully)
form
ing alon
g the length of the
bu
ffer strip area?
• Fill in erode
d areas and regrade.
RS
ARS
Is th
ere accumulation of
sedimen
t (sand
, dirt, m
ud) in
the bu
ffer strip?
• Re
move sedimen
t and
che
ck th
e grading. A
dd rep
lacemen
t soil and
or m
ulch.
PRS
RS
ARS
Is th
e mulch une
venly
distribu
ted in th
e bu
ffer strip
area?
• Re
distribu
te and
add
add
ition
al
mulch if neede
d.
• Re
grade bu
ffer strip area.
PRS
RS
ARS
Are th
ere voids and/or holes
arou
nd th
e storm drain inlet?
• Inspect the
storm
drain inlet for
damage. Rep
lace or repair as
necessary.
• Fill in erode
d areas and regrade.
PRS
RS
ARS
Is th
ere eviden
ce of a
nimal
activ
ity such as holes or dirt
mou
nds from
digging
or
borrow
ing?
• Re
pair and
fill in dam
aged
areas.
• Ro
dent con
trol activities m
ust b
e in
accordance with
app
licab
le laws
and do
not affect a
ny protected
species.
VEG
ETATED BUFFER
STR
IP‐ C
HEC
KLIST
A‐37
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Vegetation
PRS
RS
ARS
Is th
e vegetatio
n clogging
or
redirecting the inlet/ou
tlet
flow areas?
• Trim
and
/or remove the excess
vegetatio
n.
PRS
RS
ARS
Is th
e mulch distributed
even
ly th
rougho
ut th
e bu
ffer
strip?
• Re
distribu
te and
add
add
ition
al
mulch if neede
d.
• Re
grade bu
ffer strip area.
PRS
RS
ARS
Are th
ere de
ad or dry
plants/w
eeds?
Is th
e vegetatio
n over grown?
• Re
move de
ad and
/or dry
vegetatio
n. Rep
lace as ne
eded
. • Re
move or trim
any
vegetation that
is causing
a visual barrier, trip, and
or obstructio
n hazards.
• Mow
grass as ne
eded
.
VEG
ETATED BUFFER
STR
IP‐ C
HEC
KLIST
A‐38
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
BMP General
PRS
RS
ARS
Is th
ere de
bris/trash in
the
buffer strip area?
• Re
move all trash and
deb
ris.
PRS
RS
ARS
Is Graffiti present?
• Re
move all graffiti from
the area.
PRS
RS
ARS
Are th
ere missing
or disturbe
d aesthe
tics features?
• Re
place and/or rep
osition
aesthe
tics features to
original
placem
ent.
• Placem
ent sho
uld no
t disrupt flow
characteristics/de
sign.
PRS
RS
ARS
Is th
e vegetatio
n irrigatio
n functio
nal?
• Re
paired
broken missing
spray/drip
emitters.
• Re
positio
n and/or adjust to
elim
inate over spray and
/or over
watering.
PRS
RS
ARS
Are th
e aesthe
tic fe
atures
firmly secured
in place?
• Re
pair and
/or replace loose or
damaged
features.
PRS
RS
ARS
Check for damaged
sidew
alk,
curb, gutter, and
catch basin.
This includ
es uplift and
settling.
• Re
move and replace damaged
areas.
FACT SHEET‐ BOVINE TERRACE
A‐40 City of Santa Rosa and County of Sonoma
BOVINE TERRACE Also know as: Terracing, Cow Terraces, and Infiltration Terraces.
DESCRIPTION Bovine terraces are a low tech option for slowing runoff on slopes and maximizing infiltration potential. Cows (bovine) walk on contour when they graze on hillsides and create ruts, or terraces, where they walk. Intentionally replicating this natural occurrence slows runoff, increases infiltration and prevents erosion. ADVANTAGES
• Provides a tributary area reduction. Calculations to be completed using the Storm Water Calculator in Appendix C.
• Can be used on sloped sites. • Increases infiltration potential. • Increases time of concentration. • Decreases erosion. • Enhances water quality of downstream water bodies through natural processes. • Aesthetically pleasing. • Can establish habitat for birds and other pollinators like butterflies and bees. • Require minimal maintenance.
LIMITATIONS • Requires sufficient area. • Ultimate storm water collection needs to be considered in design.
FACT SHEET‐ BOVINE TERRACE
A‐41 Low Impact Development Technical Design Manual
• Prohibited in areas of known contamination. If soil and/or groundwater contamination is present on the site or within a 100’ radius of the proposed location, the North Coast Regional Water Quality Control Board review and approval is required.
• Not appropriate for sites with a high risk of landslides or other geotechnical concerns. Slope stability shall be determined by a licensed Geotechnical Engineer.
KEY DESIGN FEATURES
• Fill portion of terrace not to exceed 8” high. • Vertical portion of cut not to exceed 2’ high. • Horizontal portion of cut must be at least as wide as vertical portion of cut is high. • For slopes between 4:1 and 2:1 spacing of terraces shall not exceed 15’. • Not to be used on slopes exceeding 2:1. • Terraces must be installed on contour. • Termination of terraces needs to be designed to avoid concentrating flow at edges. • Top portion of each terrace must be adequately constructed to prevent wash out. • Vegetate sufficiently to support slope stability. • Install overflow collection system to accept flow that exceeds design capacity of the
terraces. • Infiltration rate and flow rate must be considered in the design. • Terraces must be designed to eliminate standing water within 72 hours to prevent
mosquito breeding. INSPECTION AND MAINTENANCE REQUIREMENTS A maintenance plan shall be provided with the Final SUSMP. The maintenance plan shall include recommended maintenance practices, designation of parties responsible for maintenance and upkeep, specify the funding source for ongoing maintenance with provisions for full replacement when necessary and provide site specific inspection checklist. At a minimum inspection and maintenance shall include the following:
• Inspect prior to the start and end of the rainy season to repair washouts or remove excess sediment accumulation.
• Pesticides and fertilizers should be avoided in terraced areas.
BOVINE TERR
ACE
‐ CHEC
KLIST
A‐42
City of Santa Rosa and Co
unty of Son
oma
Bovine
Terrace
Date of Inspectio
n:
Inspectio
n and Mainten
ance Che
cklist
Inspector(s):
(aka
: Terracing, Cow
Terrance, Infiltration Terrace)
BM
P ID #:
Prop
erty Owne
r:
Locatio
n Descriptio
n:
Type
of Inspe
ction: � Pre‐rainy
Season (PRS) � Rainy
Season (RS) � After‐rainy
Season (ARS)
This Inspectio
n an
d Maintenan
ce Checklist is to be used
in con
junctio
n with
its correspo
nding LID Factsheet and
Maintenan
ce Plan. Please review
these do
cuments before performing the fie
ld inspectio
n.
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Drainage
RS
Is th
ere standing
or po
oling of
water after 3 days of dry
weather?
•
Fill in and
regrade
terrace section.
BOVINE TERR
ACE
‐ CHEC
KLIST
A‐43
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Erosion
PRS, RS,
ARS
Is th
ere eviden
ce of w
asho
uts
and/or deep channe
ling alon
g the terrace?
• Fill in erode
d areas and regrade.
• Re
pair and
/or add flo
w dissipaters
alon
g the terrace.
• Terrace width m
ay need adjusting
for additio
nal capacity
.
RS, A
RS
Is th
ere channe
lization (gully)
form
ing up
/dow
n slop
e of th
e terrace section?
• Fill in erode
d areas, regrade
, and
replant slope
s.
RS, ARS
Is th
ere accumulation of excess
sedimen
t?
• Re
move sedimen
t and
regrade
section.
PRS, RS,
ARS
Is th
ere eviden
ce of a
nimal
activ
ity such as holes or dirt
mou
nds from
digging
or
borrow
ing?
• Re
pair and
fill in dam
aged
areas.
Regrade if ne
eded
. • Ro
dent/animal con
trol activities
must b
e in accordance with
applicable laws and do
not affect
any protected species.
BOVINE TERR
ACE
‐ CHEC
KLIST
A‐44
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Vegetation
PRS,
RS,ARS
Is th
e vegetatio
n concen
trating the flo
w to
a
portion of th
e terrace?
• Trim
and
/or remove the excess
vegetatio
n to establish a un
iform
flo
w.
PRS, RS,
ARS
Is th
ere excess vegetation in
the terrace area?
• Re
move the excess vegetation.
• Re
grade if ne
eded
.
ARS, PRS
Are th
ere de
ad or dry
plants/w
eeds?
• Re
move or trim
any
vegetation that
is causing
a visual barrier hazard.
• Re
move any nu
ance, dangerous
plant spe
cies.
• Re
move, trim
, mow
all vegetatio
n that m
ay present an un
usually high
fire hazard.
BOVINE TERR
ACE
‐ CHEC
KLIST
A‐45
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
BMP General
PRS, RS,
ARS
Is trash/de
bris present?
• Re
move all trash and
deb
ris.
PRS, RS,
ARS
Is th
e surrou
nding area
marked with
graffiti?
• Re
move all graffiti from
the area.
PRS, RS,
ARS
Are th
ere missing
or disturbe
d aesthe
tics features?
• Re
place and/or rep
osition
aesthe
tics features to
original
placem
ent.
• Placem
ent sho
uld no
t disrupt flow
characteristics/de
sign.
PRS, RS,
ARS
Are th
ere mosqu
itoes present?
• Co
ntact vector control.
PRS, RS,
ARS
Is th
e vegetatio
n irrigatio
n functio
nal?
• Re
paired
broken missing
spray/drip
emitters.
• Re
positio
n to elim
inate over spray
and/or over watering.
PRS, RS,
ARS
Are th
e aesthe
tic fe
atures in
good
con
ditio
n and firmly
secured?
• Re
pair and
/or replace loose or
damaged
features.
PRS, RS,
ARS
Are th
e signage, fe
ncing in
place and in goo
d cond
ition
?
• Re
place/repair signage and
fencing.
• Add
add
ition
al barriers signage to
block access to
hazardo
us areas.
FAC
A‐47
IMPERIncluding
OVERVIE ImperviopavemenImpervioimperviovegetatiowhich maaddresseemitter,
ADVANT
• Cca
• Cain
CT SHEE
City of Sant
RVIOUS Ag: splash bloc
EW
ous area discnt, to be dirous surfaces ous area. Thon and soil. ay contributes these issuand paved a
SPLA Splasdown
TAGES
an be usedapture BMPan reduce tnd volume nfiltration.
ET‐ IMP
ta Rosa and C
REA DISCcks, rain cha
connection arected to pethat drain d
hese areas pImpervious te to peak flues by discoarea disconn
ASH BLOCK D
sh blocks arenspouts can
d as part os. he size of docapture BM
PERVIO
County of Son
CONNECTains, bubble
allows stormervious natudirectly to carevent stormareas also inows and scoonnecting dinection.
DESCRIPTION
e a low tech be retrofitt
of a treatm
ownstream MPs by incre
OUS AR
oma
TION up emitters
m water fromral or landsatch basins om water infincrease the our in downsirect dischar
N
h option to hed using spl
ment train w
water qualiteasing the p
REA DIS
, and pavem
m imperviousscaped areasor storm drailtration intospeed and astream creerges by usin
hard piped dash blocks.
with volume
ty treatmenpotential fo
SCONN
ment disconn
s areas, suchs and infiltraains are a dio the soil or amount of ruks and wateng: splash b
downspout
e
t or
NECTIO
nection.
h as rooftopsate into therectly connefiltering thrunoff from aerways. This locks, bubb
systems. Ex
ON
s and e soil. ected rough a site, BMP le‐up
isting
FAC
A‐48
• C• C
LIMITATI
• A• M
KEY DESI
• Si• R• D• La
e
BUBBLE‐ Bubble‐ufurther fbuilding. ADVANT
• Cvo
• Ctrth
• C• C
LIMITATI
• A• M
KEY DESI
• R• D• 4
CT SHEE
Low Impact
an be used aan be used t
IONS
Adjacent builMay not be a
IGN FEATUR
ites should bain water m
Downspouts andscaped arosion.
‐UP EMITTER
up emitters wfrom the bu
TAGES
an be usedolume captuan reduce treatment anhe potential an be used aan be used t
IONS
Adjacent builMay not be a
IGN FEATUR
ain water mDownspouts ” diameter S
ET‐ IMP
t Developmen
as a retrofit to direct sto
dings and ovppropriate o
RES
be evaluatedmust be direcshould not bareas receiv
R DESCRIPTI
work very muilding and e
d as part ofure BMPs. the size of dnd volume cafor infiltratias a retrofit to direct sto
dings and ovppropriate o
RES
must be direcshould not bSDR‐35 pipe
PERVIO
nt Technical D
BMP. rm water to
verflow requon all sites d
d to ensure tcted away frobe directed ting roof wat
ON
much like splaeven in land
f a treatme
downstream apture BMPsion. BMP. rm water to
verflow requon all sites d
cted away frobe directed trequired as
OUS AR
Design Manua
o other BMPs
uirements ndue to space
that splash bom foundatito paved areter should b
ash blocks, bdscape area
ent train w
water quals by increasi
o other BMPs
uirements ndue to space
om foundatito paved are a minimum
REA DIS
al
s
eed to be co constraints
blocks won’tions and fooeas or acrossbe adequate
but allow foas that are
ith
ity ng
s
eed to be co constraints
ions and fooeas or acrossm.
SCONN
onsidered in .
t have negatotings. s sidewalks. ly sized to p
r storm watenot directly
onsidered in.
otings. s sidewalks.
NECTIO
design.
tive impacts.
prevent runo
er to be releadjacent to
design.
ON
.
off or
eased o the
FAC
A‐49
• DG
• Lae
• Laa
• Mfoo
• Ep
PAVED A Paved arnatural atreatmen ADVANT
• Co
• Cap
LIMITATI
• Asi
• M• O• M
KEY DESI
• R• La
e• La
a
CT SHEE
City of Sant
Distance and Geotechnicalandscaped arosion. andscaped and to prevenMay be instaor infiltratiover drain romitter shourevent mosq
AREA DISCON
reas that caarea can incrnt.
TAGES
an be used ther BMPs. an reduce tnd volume otential for
IONS
Areas receiviized and staMay be limitOverflow draMay not be a
IGN FEATUR
ain water mandscaped arosion. andscaped and to preven
ET‐ IMP
ta Rosa and C
location of Engineer. areas receiv
areas receivnt ponding wlled with a bn. Bottom ock to prevenld be equipquito breedi
NNECTION D
n be gradedrease the op
as part of a
he size of docapture BMinfiltration.
ing flow nebilized. ed by site slinage must ppropriate o
RES
must be direcareas receivi
areas receivnt ponding w
PERVIO
County of Son
emitter rela
ing roof wat
ing roof watwater. bottomless of emitter snt sedimentaped with “png.
DESCRIPTION
d so that thpportunity fo
a treatment
ownstream MPs by incre
eed to be a
opes. be providedon all sites.
cted away froing storm wa
ing roof watwater.
OUS AR
oma
ative to the b
ter should b
ter need to
emitter to ahould be plation of pipepop up” cove
N
hey drain onor infiltratio
train with
treatment easing the
adequately
.
om foundatiater should
ter need to
REA DIS
building mus
be adequate
be designed
allow aced e. er to
nto perviouson and minim
ions and foobe adequate
be designed
SCONN
st be approv
ly sized to p
d to ensure
s area, such mize the size
otings. ely sized to p
d to ensure
NECTIO
ved by a Lice
prevent runo
proper drai
as landscape of downst
prevent runo
proper drai
ON
ensed
off or
inage
pe or ream
off or
inage
IMPE
RVIOUS ARE
A DISCO
NNEC
TION‐ C
HEC
KLIST
A‐50
City of Santa Rosa and Co
unty of Son
oma
Impe
rvious Area Disconn
ection
Date of Inspectio
n:
Inspectio
n and Mainten
ance Che
cklist
Inspector(s):
(aka: splash blocks, rain chains, bub
ble up
emitters and pavemen
t disconn
ectio
n)
BMP ID #:
Prop
erty Owne
r:
Locatio
n Descriptio
n:
Type
of Inspe
ction: � Pre‐rainy
Season (PRS) � Rainy
Season (RS) � After‐rainy
Season (ARS)
This Inspectio
n an
d Maintenan
ce Checklist is to be usde
in con
junctio
n with
its correspo
nding LID Factsheet and
Maintenan
ce Plan. Please review
these do
cuments before performing the fie
ld inspectio
n.
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance
completed
and
if neede
d mainten
ance was
not con
ducted
, note whe
n it will be do
ne)
Drainage
RS
Is th
ere standing
or po
oling of
water after 3 days of dry
weather?
•
Regrade drainage area.
• Re
positio
n splash block.
• Clean inlets/outlets of o
bstructio
ns.
RS
Is th
ere excessive
splashing/spray?
•
Repo
sitio
n splash block or dissipater
to red
uce or elim
inate splash/spray.
RS
Are th
e ho
use/bu
ilding gutters
overflo
wing du
ring
a rain
even
t?
•
Flush bu
bble up pipe
to rem
ove any
obstructions.
• Ch
eck gutter dow
n spou
t and
gutter
for ob
structions. Clean
if necessary.
IMPE
RVIOUS ARE
A DISCO
NNEC
TION‐ C
HEC
KLIST
A‐51
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Erosion
RS
ARS
Is th
ere eviden
ce of u
nder
cutting or washo
uts arou
nd
splash block/dissipater?
• Re
positio
n the inlet splash block or
dissipater.
• Fill in erode
d areas and regrade.
RS
ARS
Is th
ere channe
lization (gully)
form
ing arou
nd th
e bu
bble
ups?
• Fill in erode
d areas and regrade.
RS
ARS
Is th
ere accumulation of
sedimen
t (sand
, dirt, m
ud) in
the inlets/outlets areas?
• Re
move sedimen
t and
che
ck th
e grading.
RS
ARS
Are th
ere voids or holes along
the path of the
bub
ble up
pipe
or excess sedimen
t in and
arou
nd th
e bu
bble up ou
tlet?
• Flush and inspect p
ipe for damage.
• Re
place damage pipe
, fill in
voids,
and regrade.
IMPE
RVIOUS ARE
A DISCO
NNEC
TION‐ C
HEC
KLIST
A‐52
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Vegetation
PRS
RS
ARS
Is th
e vegetatio
n clogging
the
Inlet/ou
tlet a
reas?
• Trim
and
/or remove the excess
vegetatio
n arou
nd th
e inlet/ou
tlet
areas.
PRS
RS
ARS
Is th
e mulch spread even
ly
througho
ut th
e vegetatio
n area?
• Re
distribu
te and
add
add
ition
al
mulch if neede
d.
• Re
grade vegetatio
n area.
PRS
RS
ARS
Are th
ere de
ad or dry
plants/w
eeds?
• Re
move de
ad and
/or dry
vegetatio
n. Rep
lace as ne
eded
. • Re
move or trim
any
vegetation that
is causing
a visual barrier hazard.
IMPE
RVIOUS ARE
A DISCO
NNEC
TION‐ C
HEC
KLIST
A‐53
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
BMP General
PRS
RS
ARS
Is th
ere de
bris/trash in
the
area?
• Re
move all trash and
deb
ris.
PRS
RS
ARS
Is th
e surrou
nding area
marked with
graffiti?
• Re
move all graffiti from
the area.
PRS
RS
ARS
Are th
ere missing
or disturbe
d aesthe
tics features?
• Re
place and/or rep
osition
aesthetic
features to
original placemen
t.
• Placem
ent sho
uld no
t disrupt flow
characteristics/de
sign.
PRS
RS
ARS
Check for broken
or damage
drain inlets/outlets, splash
blocks, bub
ble up
s, and
grates.
• Re
place or rep
air all dam
aged
features.
PRS
RS
ARS
Is th
e vegetatio
n irrigatio
n functio
nal?
• Re
paired
broken missing
spray/drip
emitters.
• Re
positio
n to elim
inate over spray
and/or over watering.
PRS
RS
ARS
Are th
e aesthe
tic fe
atures
firmly secured
in placed?
• Re
pair and
/or replace loose or
damaged
features.
FACT SHEET‐ RAIN GARDEN
A‐54 City of Santa Rosa and County of Sonoma
RAIN GARDEN Also know as: Bioretention cell, infiltration planter
DESCRIPTION Rain Gardens function as a soil and plant‐based filtration and infiltration feature that remove pollutants through a variety of natural physical, biological, and chemical treatment processes. Rain gardens are usually installed in yards or common open areas to treat storm water from rooftops and parking lots. ADVANTAGES
• Provides both water quality treatment and volume capture. • Provides storm water treatment that enhances water quality of downstream water
bodies through natural processes. • Vegetation provides shade and wind breaks, absorbs noise, reduces heat island effects
and adds to an area's landscape features. • Establishes habitat for birds and attracts pollinators like butterflies and bees.
LIMITATIONS
• Most effective if installed flat to promote infiltration. • Prohibited in areas of known soil and/or groundwater contamination. If soil and/or
groundwater contamination is present on the site or within a 100’ radius of the proposed location, the North Coast Regional Board review and approval is required.
FACT SHEET‐ RAIN GARDEN
A‐55 Low Impact Development Technical Design Manual
• Should not be used in areas of high ground water. A minimum of 2’ of clearance needs to be provided between the bottom of the BMP and the seasonal high ground water level. If ground water is less than 2’ from the bottom, additional design elements may be necessary (impermeable liner, subdrains, etc).
• Do not use in areas of slope instability where infiltrated storm water may cause failure. Slope stability shall be determined by a licensed Geotechnical Engineer.
• Do not use in locations that can negatively impact building foundation or footings. Location shall be approved by a licensed Geotechnical Engineer.
KEY DESIGN FEATURES
• Native soil shall remain uncompacted to preserve infiltration capacity. Fence off during construction.
• Bottom of rain garden should be unlined to allow infiltration into native soil. • If present, structural soil shall be installed as described in Reference Document E. • For rain garden that adjoin pavement or utility trenches, moisture barrier shall be
installed to protect road sub‐base and any trenches. • Use plants from the approved plant and tree list included in Appendix M. • Devise vegetation that is both wet and dry tolerant is required. • Design to achieve 51% cover. • Install a designated high flow bypass inlet for storms larger than the design storm. See
“Sizing Design” below. • If required, perforated pipe shall be a minimum of SDR 35 plastic and installed in
straight runs. • Volume below the perforated pipe must be sufficient to hold and infiltrate the design
volume. • Surface ponding depth shall range between 6” and 12”. • Must be designed to prevent extended standing water. All surface water must drain
within 72 hours to prevent mosquito breeding. • Select non‐floatable surface mulching material to prevent clogging of downstream
inlets. • Direct downspouts into rain gardens and incorporate splash blocks and/or other
dissipation methods to prevent erosion.
SIZING DESIGN‐ GOAL AND REQUIREMENTS
• The design goal for all rain gardens is to capture (infiltration and/or reuse) 100% of the volume of runoff generated by the 85th percentile 24 hour storm event. This is a retention requirement. If 100% volume capture is achieved than no additional treatment is required.
• If the design goal is not achievable, then the bioretention area sizing requirement is:
FACT SHEET‐ RAIN GARDEN
A‐56 City of Santa Rosa and County of Sonoma
o Water Quality Treatment of 100% of the flow generated by the 85th percentile 24 hour storm event, as calculated using the Rational Method and a known intensity of 0.92 inches per hour, and
o Volume Capture (infiltration and/or reuse) of the increase in volume of storm water due to development generated by the 85th percentile 24 hour storm event. This is a retention requirement.
• All calculations shall be completed using the “Storm Water Calculator” available at www.srcity.org/stormwaterLID.
Inspection and Maintenance Requirements A maintenance plan shall be provided with the Final SUSMP. The maintenance plan shall include recommended maintenance practices, state the parties responsible for maintenance and upkeep, specify the funding source for ongoing maintenance with provisions for full replacement when necessary and provide site specific inspection checklist. At a minimum inspection and maintenance shall include the following:
• Inspect twice annually and prior to rain events for blocked or clogged inlets, eroded areas, sedimentation and trash or debris accumulation.
• Obstructions and trash shall be removed and properly disposed of. • Inspect twice during the rainy season for ponded water. • If ponded water is observed, the first few inches of topsoil should be removed and
replaced. If ponded water is still present, further grading and replacement may be necessary to prevent mosquito breeding.
• Pesticides and fertilizers shall not be used in the rain garden area. Non floatable mulch should be instead.
• Plants should be pruned, weeds pulled and dead plants replaced as needed. • Observe level and condition of mulch. Add to, re‐grade or replace as needed (non‐
floatable mulch required). • Confirm slash blocks, or other dissipation method, exist to direct downspouts into rain
garden. Readjust location if needed. Replace if necessary.
RAIN GARD
EN ‐ CH
ECKLIST
A‐57
City of Santa Rosa and Co
unty of Son
oma
Rain Garde
n
Date of Inspectio
n:
Inspectio
n and Mainten
ance Che
cklist
Inspector(s):
(aka
: Bioretention Ce
ll, Infiltration Planter)
BM
P ID #:
Prop
erty Owne
r:
Locatio
n Descriptio
n:
Type
of Inspe
ction: � Pre‐rainy
Season (PRS) � Rainy
Season (RS) � After‐rainy
Season (ARS)
This Inspectio
n an
d Maintenan
ce Checklist is to be used
in con
junctio
n with
its correspo
nding LID Factsheet and
Maintenan
ce Plan. Please review
these do
cuments before performing the fie
ld inspectio
n.
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance
completed
and
if neede
d mainten
ance was
not con
ducted
, note whe
n it will be do
ne)
Drainage
RS
Is th
ere standing
or p
ooling of
water in
the Ra
in Garde
n area
after 3 days of d
ry weather?
•
Check pe
rforated
pipe ou
tlet for
obstruction or dam
age. *
• Flush pe
rforated
pipe to rem
ove
obstructions/sed
imen
t. *
• Re
move and replace the first fe
w inches of
topsoil.
• Re
move soil and inspect p
erforated pipe
. Re
pair or replace pe
rforated
pipe, rep
lace
with
new
soil and
regrade
.
RS
Is th
ere po
or drainage du
ring
a
high
intensity
storm
event?
•
Clean the high
flow
bypass inlet a
nd pipe.
RS
Is th
e flo
w into th
e Ra
in Garde
n even
and
uniform
?
• Re
move any ob
struction preven
ting a
unifo
rm flow
into th
e sw
ale.
• Re
grade up
slope
if necessary.
• Re
positio
n splash block/dissipater.
* If pe
rforated
pipe is present.
RAIN GARD
EN ‐ CH
ECKLIST
A‐58
Low Im
pact Develop
men
t Techn
ical Design Manual
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Erosion
RS
ARS
Is th
ere un
der cutting or
washo
uts arou
nd th
e splash
blocks or dissipaters?
• Fill in erode
d areas and regrade.
• Re
positio
n splash block/dissipater.
RS
ARS
Is th
ere channe
lization (gully)
form
ing alon
g the length of the
Ra
in Garde
n area?
• Fill in erode
d areas and regrade.
RS
ARS
Is th
ere accumulation of
sedimen
t (sand
, dirt, m
ud) in
the Ra
in Garde
n?
• Re
move sedimen
t and
che
ck th
e grading. A
dd rep
lacemen
t soil
and/or m
ulch.
PRS
RS
ARS
Is th
e mulch une
venly
distribu
ted in th
e Ra
in Garde
n area?
• Re
distribu
te and
add
add
ition
al
mulch if neede
d.
• Re
grade planter a
rea.
PRS
RS
ARS
Are th
ere voids or deep ho
les
presen
t?
Is th
ere sedimen
t present in
the
catch basin and in th
e overflo
w
pipe
?
• Ch
eck pe
rforated
pipe ou
tlet for
damage. *
PRS
RS
ARS
Is th
ere eviden
ce of a
nimal
activ
ity such as holes or dirt
mou
nds from
digging
or
borrow
ing?
• Re
pair and
fill in dam
age areas.
• Ro
dent con
trol activities m
ust b
e in
accordance with
app
licab
le laws
and do
not affect a
ny protected
species.
* If pe
rforated
pipe is present.
RAIN GARD
EN ‐ CH
ECKLIST
A‐59
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Vegetation
PRS
RS
ARS
Is th
e vegetatio
n clogging
or
diverting the inpu
t flow areas?
• Trim
and
/or rem
ove the excess
vegetatio
n.
PRS
RS
ARS
Is th
e mulch evenly
distribu
ted througho
ut th
e area?
• Re
distribu
te and
add
add
ition
al
mulch if neede
d.
• Re
grade planter a
rea.
PRS
RS
ARS
Are th
ere de
ad or dry
plants/w
eeds?
Is th
e vegetatio
n over grown?
• Re
move de
ad and
/or dry
vegetatio
n. Rep
lace as ne
eded
. • Re
move or trim
any
vegetation that
is causing
a visual barrier, trip,
and/or obstructio
n hazard.
RAIN GARD
EN ‐ CH
ECKLIST
A‐60
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
BMP General
PRS
RS
ARS
Is th
ere de
bris/trash in
the
Rain Garde
n area?
• Re
move all trash and
deb
ris.
PRS
RS
ARS
Is Graffiti present?
• Re
move all graffiti from
the area.
PRS
RS
ARS
Are th
ere missing
or disturbe
d aesthe
tic fe
atures?
• Re
place and/or rep
osition
aesthetic
features to
original placemen
t.
• Placem
ent sho
uld no
t disrupt flow
characteristics/de
sign.
PRS
RS
ARS
Is th
e vegetatio
n irrigatio
n functio
nal?
• Re
paired
broken missing
spray/drip
emitters.
• Re
positio
n and/or adjust to
elim
inate over spray and
/or over
watering.
PRS
RS
ARS
Are th
e aesthe
tic fe
atures
firmly secured
in place?
• Re
pair and
/or replace loose or
damaged
features.
FACT SHEET‐ BIORETENTION
A‐64 City of Santa Rosa and County of Sonoma
BIORETENTION Also know as: Street rain garden, roadside bioretention, and bioretention cell
DESCRIPTION The bioretention area best management practice (BMP) functions as a soil and plant‐based filtration and infiltration feature that removes pollutants through a variety of natural physical, biological, and chemical treatment processes. ADVANTAGES
• Achieves both water quality and volume capture objectives. • Bioretention areas provide storm water treatment that enhances the quality of
downstream water bodies by using natural processes. • The vegetation provides shade and wind breaks, absorbs noise, reduces heat island
effects and improves an area's landscape. • Bioretention provides habitat for birds and attracts other pollinators like butterflies and
bees. • Does not interrupt utility installation. • Does not interfere with tree planting.
FACT SHEET‐ BIORETENTION
A‐65 Low Impact Development Technical Design Manual
LIMITATIONS • Bioretention is not recommended for areas where street slopes exceed 10%. • Should not be used in areas of known contamination. If soil and/or groundwater
contamination is present on the site or within a 100’ radius of the proposed BMP location, the North Coast Regional Water Quality Control Board will need to be contacted and the site reviewed.
• Should not be used in areas of high groundwater. In general a minimum of 2’ of clearance should be provided between the bottom of the bioretention cell and seasonal high groundwater.
• Should not be used in areas of slope instability where infiltrated storm water may cause failure. Slope stability should be determined by a licensed geotechnical engineer.
• Do not use in locations that can negatively impact building foundation or footings. Location shall be approved by a licensed Geotechnical Engineer.
KEY DESIGN FEATURES ALL BIORETENTION
• Structural soil should be used within the bioretention area requiring load bearing capacity (adjacent to roadways and/or buildings.)
• Structural soil shall be installed as described in Reference Document E. • Some BMPs may not require the use of structural soil and a more organic type planting
soil and/or treatment media may be used in its place. It may be possible in some cases to use native soil or to amend the native soil so that it is suitable. Use of non‐structural soil will depend on evaluation of the criteria in “Chapter 4‐Site Assessment” as well as consideration of structural needs and may require evaluation by a licensed Geotechnical Engineer.
• Native soil should remain uncompacted to preserve infiltration capacity. Fence off the area during construction to protect it from compaction.
• Bottom of bioretention should be unlined to allow infiltration into native soil. • Moisture barrier must be installed to protect road sub‐base and any trenches adjacent
to the bioretention area. • If used, pervious concrete shall be designed and installed as described in Appendix G. • If used, porous gutter must be protected during construction to prevent sediment
loading. • If the porous gutter design option is used additional trash and sediment capture BMPs
may be required • A curb opening type design may be used in place of a porous gutter if appropriate for
the project. • Bioretention areas shall be planted with plants from the approved plant and tree list
included in Appendix F and shall be planted to achieve 51% cover.
FACT SHEET‐ BIORETENTION
A‐66 City of Santa Rosa and County of Sonoma
• All bioretention areas shall be designed with a designated high flow bypass inlet for storms larger than the design storm.
• 6” perforated pipe to be installed at a depth of 6” below road structural section. • Perforated pipe shall be installed in straight runs. • The volume below the perforated pipe must be sufficient to hold and infiltrate the
design volume. SIZING DESIGN‐ GOAL AND REQUIREMENTS
• The design goal for all bioretention areas is to capture (infiltration and/or reuse) 100%
of the volume of runoff generated by the 85th percentile 24 hour storm event. This is a retention requirement. If 100% volume capture is achieved than no additional treatment is required.
• If the design goal is not achievable, then the bioretention area sizing requirement is: o Water Quality Treatment of 100% of the flow generated by the 85th percentile
24 hour storm event, as calculated using the Rational Method and a known intensity of 0.20 inches per hour, and
o Volume Capture (infiltration and/or reuse) of the increase in volume of storm water due to development generated by the 85th percentile 24 hour storm event. This is a retention requirement.
• All calculations shall be completed using the “Storm Water Calculator” available at www.srcity.org/stormwaterLID.
INSPECTION AND MAINTENANCE REQUIREMENTS A maintenance plan shall be provided with the Final SUSMP. The maintenance plan shall include recommended maintenance practices, state the parties responsible for maintenance and upkeep, specify the funding source for ongoing maintenance with provisions for full replacement when necessary and provide site specific inspection checklist. At a minimum maintenance shall include the following:
• Dry street sweeping upon completion of construction • Dry street sweeping annually, and
o When water is observed flowing in the gutter during a low intensity storm. o Algae is observed in the gutter. o Sediment/debris covers 1/3 of the gutter width or more.
• Inspect twice annually for sedimentation and trash accumulation in the gutter. Obstructions and trash shall be removed and properly disposed of.
• Inspect twice during the rainy season for ponded water. • Pesticides and fertilizers shall not be used in the bioretention area. • Plants should be pruned, weeds pulled and dead plants replaced as needed.
PLANTER STRIP BIORE
TENTION‐ C
HEC
KLIST
A‐67
City of Santa Rosa and Co
unty of Son
oma
Plan
ter Strip Bioreten
tion
Date of Inspectio
n:
Inspectio
n and Mainten
ance Che
cklist
Inspector(s):
(aka
: Street R
ain Garde
n, Roadside Bioreten
tion, Bioretention Ce
ll)
BMP ID #:
Prop
erty Owne
r:
Locatio
n Descriptio
n:
Type
of Inspe
ction: � Pre‐rainy
Season (PRS) � Rainy
Season (RS) � After‐rainy
Season (ARS)
This Inspectio
n an
d Maintenan
ce Checklist is to be used
in con
junctio
n with
its correspo
nding LID Factsheet and
Maintenan
ce Plan. Please review
these do
cuments before performing the fie
ld inspectio
n.
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance
completed
and
if neede
d mainten
ance was
not con
ducted
, note whe
n it will be do
ne)
Drainage
RS
Is th
ere standing
or p
ooling of
water in
the Bioreten
tion area
after 3 days of d
ry weather?
•
Check pe
rforated
pipe ou
tlet for
obstruction or dam
age. *
• Flush pe
rforated
pipe to rem
ove
obstructions/sed
imen
t. *
• Re
move and replace the first fe
w inches of
topsoil.
• Re
move soil and inspect p
erforated pipe
. Re
pair or replace pe
rforated
pipe, rep
lace
with
new
soil and
regrade
.
Is water not draining into catch
basin from
the overflo
w pipe
during
a high intensity
storm
? *
PRS
RS
ARS
Is th
ere sedimen
t visible in
the
gutter?
•
In dry weather, use a m
echanical sweepe
r or a Vactor truck to
clean
gutter pan.
RS
Is th
ere water flow
ing in th
e pe
rvious con
crete gutter sectio
n du
ring
a low intensity
storm
? *
•
In wet weather, use a Vactor truck to
clean gutter pan.
* If pe
rforated
pipe is present.
PLANTER STRIP BIORE
TENTION‐ C
HEC
KLIST
A‐68
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Erosion
RS
ARS
Is th
ere un
der cutting or
washo
uts alon
g the side
walks
and/or curbs abu
tting the
planter strip?
• Fill in erode
d areas and regrade.
RS
ARS
Is th
ere channe
lization (gully)
form
ing alon
g the length of the
planter area?
• Fill in erode
d areas and regrade.
RS
ARS
Is th
ere accumulation of
sedimen
t (sand
, dirt, m
ud) in
the planter?
• Re
move sedimen
t and
che
ck th
e grading. A
dd rep
lacemen
t soil
and/or m
ulch.
PRS
RS
ARS
Is th
e mulch une
venly
distribu
ted in th
e planter a
rea?
• Re
distribu
te and
add
add
ition
al
mulch if neede
d.
• Re
grade planter a
rea.
PRS
RS
ARS
Are th
ere voids or deep ho
les
presen
t?
Is th
ere sedimen
t present in
the
catch basin and in th
e overflo
w
pipe
?
• Ch
eck the pe
rforated
pipe for
damage.*
PRS
RS
ARS
Is th
ere eviden
ce of a
nimal
activ
ity such as holes or dirt
mou
nds from
digging
or
borrow
ing?
• Re
pair and
fill in dam
age areas.
• Ro
dent con
trol activities m
ust b
e in
accordance with
app
licab
le laws
and do
not affect a
ny protected
species.
* If pe
rforated
pipe is present.
PLANTER STRIP BIORE
TENTION‐ C
HEC
KLIST
A‐69
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Vegetation
PRS
RS
ARS
Is th
e vegetatio
n clogging
the
inlet flow areas?
• Trim
and
/or remove the excess
vegetatio
n.
PRS
RS
ARS
Is th
e mulch distributed
even
ly th
rougho
ut th
e planter
area?
• Re
distribu
te and
add
add
ition
al
mulch if neede
d.
• Re
grade planter a
rea.
PRS
RS
ARS
Are th
ere de
ad or dry
plants/w
eeds?
Is th
e vegetatio
n over grown?
• Re
move de
ad and
/or dry
vegetatio
n. Rep
lace as ne
eded
. • Re
move or trim
any
vegetation that
is causing
a visual barrier, trip, and
or obstructio
n hazard.
PLANTER STRIP BIORE
TENTION‐ C
HEC
KLIST
A‐70
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
BMP General
PRS
RS
ARS
Is th
ere de
bris/trash in
the
planter area?
• Re
move all trash and
deb
ris.
PRS
RS
ARS
Is graffiti present?
• Re
move all graffiti from
the area.
PRS
RS
ARS
Are th
ere missing
or disturbe
d aesthe
tics features?
• Re
place and/or rep
osition
aesthe
tics features to
original
placem
ent.
• Placem
ent sho
uld no
t disrupt flow
characteristics/de
sign.
PRS
RS
ARS
Is th
e vegetatio
n irrigatio
n functio
nal?
• Re
paired
broken missing
spray/drip
emitters.
• Re
positio
n and/or adjust to
elim
inate over spray and
/or over
watering.
PRS
RS
ARS
Are th
e aesthe
tic fe
atures
firmly secured
in placed?
• Re
pair and
/or replace loose or
damage features.
PRS
RS
ARS
Check for damage side
walk,
curb, gutter, and
catch basin
includ
ing up
lift a
nd settling.
• Re
move and replace damaged
areas.
FACT SHEET‐ CONSTRUCTED WETLANDS
A‐85 City of Santa Rosa and County of Sonoma
CONSTRUCTED WETLAND Also know as: Artificial Wetlands
DESCRIPTION
Constructed wetlands are designed to mimic natural wetlands with varied depth pools and wetland plants. Constructed wetlands remove pollutants through a variety of natural physical, biological, and chemical treatment processes. They retain storm water and allow it to infiltrate and evapotranspirate while allowing pollutants to settle out and provide habitat.
ADVANTAGES
• Provides both water quality treatment and volume capture. • Provides storm water treatment that enhances water quality of
downstream water bodies through natural processes. • Aesthetically pleasing. • Can provide recreation and educational information to the
public. • Vegetation provides shade and wind breaks, absorbs noise,
reduces heat island effects and adds to an area's landscape features.
• Establishes habitat for birds, amphibians, dragonflies, and pollinators like butterflies and bees.
FACT SHEET‐ CONSTRUCTED WETLANDS
A‐86 Low Impact Development Technical Design Manual
LIMITATIONS • Requires sufficient area. • Prohibited in areas of known contamination. If soil and/or groundwater contamination is
present on the site or within a 100’ radius of the proposed location, the Regional Board review and approval is required.
• Do not use in areas of slope instability where infiltrated storm water may cause failure. Slope stability shall be determined by a licensed Geotechnical Engineer.
KEY DESIGN FEATURES • Compartmentalization and variation in pool size and depth recommended. • 20’ maximum distance across wetland if only accessible from all weather access road on
one side. • Perimeter all weather access road required if wetland is greater than 20’ wide. Roads
should be located as close to the shoreline as possible. • 40’ maximum distance across wetland. • Design for water depth over 1’. Preferably 3’‐4’ with plant free areas over 5’ in depth. • 50% or less overall vegetative cover. • 25% of vegetation should be maintained as isolated islands away from the ponds perimeter. • Raised planting beds to limit and narrow vegetated zones. • 1%‐5% slope recommended along bottom of wetland for dewatering, maintenance, and
mosquito control. • 2.5:1 to 4:1 bank slope recommended to limit vegetation growth and ensure access. • 4:1 max bank slope to allow access for mowing and sampling. • Peripheral vegetation zones should be less than 3’ wide or minimum required for wildlife. • Design to maximize spread and movement of water in wetland. • Design to allow for complete dewatering of wetland for maintenance and mosquito control. • Include an access ramp to basin floor for maintenance equipment. • Concrete liners in shallow areas to discourage vegetation where not necessary. • Design and necessary approvals to drain wetland completely when needed (Salinas – Outlet
structure should be designed to drain the WQv (Water Quality Volume) within a minimum of 48 hours.
FACT SHEET‐ CONSTRUCTED WETLANDS
A‐87 City of Santa Rosa and County of Sonoma
SIZING DESIGN‐ GOAL AND REQUIREMENTS
• The design goal for all constructed wetlands is to capture (infiltration and/or reuse) 100% of the runoff volume generated by the 85th percentile 24 hour storm event. 100% volume capture has been established as the ideal condition. If achieved, all requirements are satisfied and no additional treatment is required. This is a retention requirement.
• If the design goal is not achievable, then the constructed wetland sizing requirement is: o Treatment of 100% of the flow generated by the 85th percentile 24 hour storm
event, as calculated using the Rational Method and a know intensity of 0.20 inches per hour, and
o Volume Capture (infiltration and/or reuse) of the increase in volume of storm water due to development generated by the 85th percentile 24 hour storm event. This is a retention requirement.
• All calculations shall be completed using the “Storm Water Calculator” available at www.srcity.org/stormwaterLID.
INSPECTION AND MAINTENANCE REQUIREMENTS
• A maintenance plan shall be provided with the Final SUSMP. The maintenance plan shall include recommended maintenance practices, state the parties responsible for maintenance and upkeep, specify the funding source for ongoing maintenance with provisions for full replacement when necessary, and provide site specific inspection checklist. Remember; designing for maintenance and to restrict emergent vegetation minimizes maintenance requirements.
At a minimum inspection and maintenance shall include the following:
• If vegetation removal is performed, biomass must be removed • Ability to dewater sections or the entire wetland for mosquito control or maintenance.
Valves, weirs, etc. • Vegetation control – removal, thinning, or mowing
CONSTRU
CTED
WETLA
NDS‐ CHEC
KLIST
A‐88
City of Santa Rosa and Co
unty of Son
oma
Constructed Wetland
s
Date of Inspectio
n:
Inspectio
n and Mainten
ance Che
cklist
Inspector(s):
(aka
: Artificial W
etland
s)
BM
P ID #:
Prop
erty Owne
r:
Locatio
n Descriptio
n:
Type
of Inspe
ction: � Pre‐rainy
Season (PRS) � Rainy
Season (RS) � After‐rainy
Season (ARS)
This Inspectio
n an
d Maintenan
ce Checklist is to be used
in con
junctio
n with
its correspo
nding LID Factsheet and
Maintenan
ce Plan. Please review
these do
cuments before performing the fie
ld inspectio
n
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance
completed
and
if neede
d mainten
ance was
not con
ducted
, note whe
n it will be do
ne)
Drainage
PRS
RS
ARS
Is th
ere a high
drawdo
wn of
water level over a short
period
?
•
Check ou
tlet con
trol value
s and he
ight
of outlet/over flow
chann
el. R
epair
and/or rep
lace com
pone
nts as
necessary.
• Re
view
ope
ratio
nal m
anual.
PRS
RS
ARS
Check the op
eration of th
e drainage system (V
alves, W
eirs,
pipe
s etc.)
•
Cycle the drainage system to
verify
op
eration.
RS
Is water overflowing the side
s of th
e po
nd during major storm
even
ts?
•
Check ou
tlet a
rea for ob
struction or
damage.
• Ch
eck High Flow
Bypass inlet p
ipe/
overflo
w chann
el fo
r ob
struction or
damage.
CONSTRU
CTED
WETLA
NDS‐ CHEC
KLIST
A‐89
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Erosion
RS
ARS
Is th
ere eviden
ce of u
nder
cutting or washo
uts arou
nd
the inlet/ou
tlet o
f the
pon
d?
• Re
‐position
the inlet splash rocks
and/or dissipater(s).
• Fill in erode
d areas and re‐grade
.
RS
ARS
Is th
ere channe
lization (gully)
form
ing alon
g the banks of th
e po
nd?
• Fill in erode
d areas, re‐grade banks,
and replant a
rea.
• Re
move excess sed
imen
t from th
e po
nd.
PRS
RS
ARS
Is th
ere accumulation of
sedimen
t (sand
, dirt, m
ud) in
the po
nd?
• Re
move sedimen
t from th
e po
nd
and re‐grade
the po
nd’s bottom if
need
ed.
PRS
RS
ARS
Is th
ere eviden
ce of a
nimal
activ
ity such as holes or dirt
mou
nds from
digging
or
borrow
ing?
• Re
pair and
fill in dam
aged
areas.
Re‐grade
if neede
d.
• Ro
dent/animal con
trol activities
must b
e in accordance with
applicable laws and do
not affect
any protected species.
CONSTRU
CTED
WETLA
NDS‐ CHEC
KLIST
A‐90
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Vegetation
PRS
RS
ARS
Is th
e vegetatio
n clogging
the
Inlet/ou
tlet a
reas?
• Trim
and
/or remove the excess
vegetatio
n arou
nd th
e inlet/ou
tlet
areas.
PRS
RS
ARS
Is th
ere excess vegetation in
the po
nd?
• Re
move the excess vegetation and
biom
ass.
• Re
‐grade
pon
d bo
ttom
if need.
PRS
RS
ARS
Are th
ere de
ad or dry
plants/w
eeds on the banks of
the po
nd?
• Re
move de
ad and
/or dry
vegetatio
n.
• Re
move or trim
any
vegetation that
is causing
a visual barrier hazard.
• Re
move any nu
ance, dangerous
plant spe
cies.
• Re
move, trim
, mow
all vegetatio
n that m
ay present a fire hazard.
CONSTRU
CTED
WETLA
NDS‐ CHEC
KLIST
A‐91
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
BMP General
PRS
RS
ARS
Is th
ere trash/de
bris in
and
arou
nd th
e po
nd?
• Re
move all trash and
deb
ris.
PRS
RS
ARS
Is th
e surrou
nding area
marked with
graffiti?
• Re
move all graffiti from
the area.
PRS
RS
ARS
Are th
ere missing
or disturbe
d aesthe
tics features?
• Re
place and/or rep
osition
aesthe
tics features to
original
placem
ent.
• Placem
ent sho
uld no
t disrupt flow
characteristics/de
sign.
PRS
RS
ARS
Are th
ere mosqu
itoes present?
• Co
ntact vector control.
PRS
RS
ARS
Is th
e vegetatio
n irrigatio
n functio
nal?
• Re
paired
broken missing
spray/drip
emitters.
• Re
positio
n to elim
inate over spray
and/or over watering.
PRS
RS
ARS
Are th
e aesthe
tic fe
atures in
good
con
ditio
n and firmly
secured?
• Re
pair and
/or replace loose or
damage features.
PR
S RS
ARS
Are th
e signage, fe
ncing in
place and in goo
d cond
ition
?
• Re
place/repair signage and
fencing.
• Add
add
ition
al barriers signage to
block access to
hazardo
us areas.
A‐92
INFILTRAlso know
DESCRIPT Infiltratiostorm wastorm wapart of a to achiev ADVANT
• P• C• C• Si
LIMITATI
• D
FAC
City of Sant
RATION Tw as: Infiltra
TION
on Trenches ater and alloater from lantreatment tve the Volum
TAGES
rovides voluan be used aan be used oimple to inst
IONS
Does not ach
CT SHE
ta Rosa and C
TRENCH ation Gallery
are typicallyow it to infiltndscape or otrain with otme Capture r
ume captureas part of a ton sloped sittall.
ieve treatme
ET‐ INF
County of Son
y, Soakage Tr
y long narrotrate into theopen space bher BMP (surequirement
. treatment trtes.
ent.
FILTRA
oma
rench
w trenches te soil. Infiltrabefore it crouch as Vegett.
rain with tre
ATION T
that are filleation trenchosses onto patated Buffer
eatment BM
TRENCH
ed with gravehes can be usaved area orStrips or Ve
Ps.
H
el that receivsed to intercr can be useegetated Swa
ve cept d as ales)
FACT SHEET‐ INFILTRATION TRENCH
A‐93 Low Impact Development Technical Design Manual
• Impacts to adjacent buildings and overflow requirements need to be considered in design.
• Requires adequate space. KEY DESIGN FEATURES
• Install a designated high flow bypass inlet or route. • Design to prevent standing water. All surface water must drain within 72 hours to
prevent mosquito breeding.
SIZING DESIGN‐ GOAL AND REQUIREMENTS
• The design goal is to capture of 100% of the runoff volume generated by the 85th percentile 24 hour storm event. 100% volume capture has been established as the ideal condition. If achieved, all requirements are satisfied and no additional treatment is required. This is a retention requirement.
• If the design goal is not achievable, then the rain water harvesting sizing requirement is: o Volume Capture of the increase in volume of storm water due to development
generated by the 85th percentile 24 hour storm event, as calculated using the "Urban Hydrology for Small Watersheds" TR‐55 Manual.
• All calculations shall be completed using the “Storm Water Calculator” available at www.srcity.org/stormwaterLID
INSPECTION AND MAINTENANCE REQUIREMENTS
A maintenance plan shall be provided with the Final SUSMP. The maintenance plan shall include recommended maintenance practices, identify the parties responsible for maintenance and upkeep, specify the funding source for ongoing maintenance with provisions for full replacement when necessary and provide site specific inspection checklist. At a minimum inspection and maintenance shall include the following: • Inspect twice annually for ponded water. If ponded water is observed, the top layer of
pea gravel will need to be replaced. • If ponded water remains, further grading and replacement may be necessary to prevent
mosquito breeding. • The high flow inlet should be inspected and cleaned as necessary to remove any
obstructions. • Pesticides and fertilizers shall not be used in vegetated areas draining to the infiltration
trench. • Remove any accumulated sediment and/or trash.
FACT SHEET‐ POROUS PAVEMENT
A‐95 City of Santa Rosa and County of Sonoma
POROUS PAVEMENT Also know as: Unit Pavers, Porous Concrete, and Pervious Pavement
DESCRIPTION Porous Pavement is a system comprised of load‐bearing, durable surface together with an underlying layered structure that temporarily stores water prior to infiltration or drainage to a controlled outlet. The surface can be porous such that water infiltrates across the entire surface of the material (e.g., crushed aggregate, porous concrete and porous asphalt), or it can be constructed of impermeable blocks separated by spaces and joints, through which the water can drain. This latter system is termed ‘permeable’ paving. Pervious paving is used for light vehicle loading in parking areas. For a surface to be considered porous it must allow water to infiltrate in to the soil below. Perforated pipe may be installed high in the section and the volume below the perforated pipe may be counted toward volume capture if no impermeable liner is installed. Sections with perforated pipe or liners at the bottom provide treatment only. ADVANTAGES • Significant flow attenuation and improvement in water quality. • Can remove both the soluble and fine particulate pollutants. • Roof runoff can be piped into the subsurface storage area directly, which would increase
the level of flow attenuation. • Within lined systems, there is the opportunity for stored runoff to be piped out for reuse. • Pervious pavements have a high level of applicability because they are unobtrusive.
FACT SHEET‐ POROUS PAVEMENT
A‐96 Low Impact Development Technical Design Manual
LIMITATIONS • Can become clogged if improperly installed or maintained. However, this problem is
minimized by the ease with which small areas of paving can be cleaned or replaced when blocked or damaged.
• Use should be limited to car parking areas and other lightly trafficked or nontrafficked areas. Pervious surfaces are currently not considered suitable for roadways within the public right‐of‐way.
• Prohibited in areas of known contamination. If soil and/or groundwater contamination is present on the site or within a 100’ radius of the proposed location, the North Coast Regional Board review and approval is required.
• Do not use in areas of slope instability where infiltrated storm water may cause failure. Slope stability shall be determined by a licensed Geotechnical Engineer.
• Do not use in locations that can negatively impact building foundation or footings. Location shall be approved by a licensed Geotechnical Engineer.
KEY DESIGN FEATURES • The subgrade should be able to sustain traffic loading without
excessive deformation. • The granular capping and sub‐base layers should give sufficient load‐
bearing to provide an adequate construction platform and base for the overlying pavement layers.
• Prevent cracking or excessive rutting from the wear of traffic. The horizontal tensile stress at the base of these layers.
• Pervious pavements require a single size grading to create voids for infiltration. The choice of materials is therefore a compromise between stiffness, permeability and storage capacity.
• Because the sub‐base and capping will be in contact with water for extended periods, the strength and durability of the aggregate particles when saturated and subjected to wetting and drying should be assessed.
• A uniformly graded single size material cannot be compacted and is liable to move when construction traffic passes over it. This effect can be reduced by the use of angular crushed rock material with a high surface friction.
• Pervious concrete shall be designed and installed as described in Appendix G.
SIZING DESIGN‐ GOAL AND REQUIREMENTS
• The design goal is to capture (infiltration and/or reuse) 100% of the volume of runoff generated by the 85th percentile 24 hour storm event. This is a retention requirement. If 100% volume capture is achieved than no additional treatment is required.
FACT SHEET‐ POROUS PAVEMENT
A‐97 City of Santa Rosa and County of Sonoma
• If the design goal is not achievable, then the sizing requirement is: o Water Quality Treatment of 100% of the flow generated by the 85th percentile
24 hour storm event, as calculated using the Rational Method and a known intensity of 0.92 inches per hour, and
o Volume Capture (infiltration and/or reuse) of the increase in volume of storm water due to development generated by the 85th percentile 24 hour storm event. This is a retention requirement.
• All calculations shall be completed using the “Storm Water Calculator” available at www.srcity.org/stormwaterLID.
INSPECTION AND MAINTENANCE REQUIREMENTS A maintenance plan shall be provided with the Final SUSMP. The maintenance plan shall include recommended maintenance practices, state the parties responsible for maintenance and upkeep, specify the funding source for ongoing maintenance with provisions for full replacement when necessary and provide site specific inspection checklist. At a minimum inspection and maintenance shall include the following:
• Keep landscaped areas well maintained • Prevent soil from washing onto pavement
Pervious Pavement shall be inspected and maintained 2‐3 times per year: a) Vacuum clean surface using commercial sweeping machines at the following times:
• End of winter (April) • Mid‐summer (July / August) • After autumn leaf‐fall (November) • Inspect outlets annually
b) As needed maintenance:
• If routine cleaning does not restore infiltration rates, then reconstruction of part of the pervious surface may be required.
• The surface area affected by hydraulic failure should be lifted for inspection of the internal materials to identify the location and extent of the blockage.
• Surface materials should be lifted and replaced after brush cleaning. Geotextiles may need complete replacement.
• Sub‐surface layers may need cleaning and replacing. • Due to the accumulation of pollutants, removed silts may need to be disposed of as
controlled waste.
PORO
US PA
VEM
ENT‐ CHEC
KLIST
A‐98
City of Santa Rosa and Co
unty of Son
oma
Porous Pavem
ent
Date of Inspectio
n:
Inspectio
n and Mainten
ance Che
cklist
Inspector(s):
(aka
: Unit P
avers, Porou
s Co
ncrete)
BM
P ID #:
Prop
erty Owne
r:
Locatio
n Descriptio
n:
Type
of Inspe
ction: � Pre‐rainy
Season (PRS) � Rainy
Season (RS) � After‐rainy
Season (ARS)
This Inspectio
n an
d Maintenan
ce Checklist is to be used
in con
junctio
n with
its correspo
nding LID Factsheet and
Maintenan
ce Plan. Please review
these do
cuments before performing the fie
ld inspectio
n.
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance
completed
and
if neede
d mainten
ance was
not con
ducted
, note whe
n it will be do
ne)
Drainage
RS
Is th
ere standing
or po
oling of
water?
•
Check pe
rforated
pipe ou
tlet for
obstruction or dam
age. *
• Flush pe
rforated
pipe to rem
ove
obstructions/sed
imen
t. *
• Re
pair or replace pe
rforated
pipe,
replace with
new
soil and
regrade
. •
Subsurface layers m
ay need cleaning
and/or rep
lacing.
• In dry weather, use a m
echanical
sweepe
r or a vactor truck to vacuu
m
clean surface area.
• In wet weather, use a vactor truck to
vacuum
clean
surface area.
Is th
ere visible water flow
ing
over th
e surface of th
e pe
rvious con
crete/pavers
during
a low intensity
storm
?
PRS
RS
ARS
Is th
ere sedimen
t visible on the
surface of th
e pe
rvious
concrete/pavers?
•
In dry weather, use a m
echanical
sweepe
r or a vactor truck to vacuu
m
clean surface area.
* If pe
rforated
pipe is present.
PORO
US PA
VEM
ENT‐ CHEC
KLIST
A‐99
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Erosion
RS
ARS
Is th
ere un
der cutting or
washo
uts alon
g the side
walks
and/or curbs abu
tting a
planter strip?
• Fill in erode
d areas and regrade.
PRS
RS
ARS
Are th
ere cracks, uplifts,
slum
ps, m
issing
pavers, and
/or
pot h
oles present?
Is th
ere sedimen
t present in
the
catch basin and in th
e overflo
w
pipe
?
• Ch
eck pe
rforated
pipe ou
tlet for
damage. *
• Re
pair or replace pe
rforated
pipe,
replace with
new
soil and
regrade
.*
• Subsurface layers m
ay need
cleaning
and
/or replacing.
• Re
place or rep
air damaged
areas.
* If pe
rforated
pipe is present.
PORO
US PA
VEM
ENT‐ CHEC
KLIST
A‐100
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Vegetation
PRS
RS
ARS
Is th
e vegetatio
n clogging
the
inlet flow areas?
• Trim
and
/or remove the excess
vegetatio
n.
PRS
RS
ARS
Is th
ere vegetatio
n grow
ing in
the cracks, stress lines, and
/or
abutmen
t areas?
• Re
move vegetatio
n.
• In
dry weather, use a m
echanical
sweepe
r or a vactor truck to
vacuum
clean
surface area.
• In wet weather, use a vactor truck
to vacuu
m clean
surface area.
PRS
RS
ARS
Is algae
present?
• In dry weather, use a m
echanical
sweepe
r or a vactor truck to
vacuum
clean
surface area.
• In wet weather, use a vactor truck
to vacuu
m clean
surface area.
PORO
US PA
VEM
ENT‐ CHEC
KLIST
A‐101
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
BMP General
PRS
RS
ARS
Is th
ere de
bris/trash area?
• Re
move all trash and
deb
ris.
PRS
RS
ARS
Is th
ere gum or othe
r material
stuck to th
e pe
rvious surface?
• In dry weather, use a m
echanical
sweepe
r or a vactor truck to
vacuum
clean
surface area.
• In wet weather, use a vactor truck
to vacuu
m clean
surface area.
PRS
RS
ARS
Is graffiti present?
• Re
move all graffiti from
the area.
PRS
RS
ARS
Are th
ere missing
or disturbe
d aesthe
tics features?
• Re
place and/or rep
osition
aesthe
tics features to
original
placem
ent.
• Placem
ent sho
uld no
t disrupt flow
characteristics/de
sign.
PRS
RS
ARS
Are th
e aesthe
tic fe
atures
firmly secured
in placed?
• Re
pair and
/or replace loose or
damaged
features.
PRS
RS
ARS
Check for damage side
walk,
curb, gutter, and
catch basin
includ
ing up
lift a
nd settling.
• Re
move and replace damaged
areas.
FACT SHEET‐ VEGETATED SWALE
A‐103 City of Santa Rosa and County of Sonoma
VEGETATED SWALE Also know as: Bioretention Swale, Treatment Swale, and Grassy Swale
DESCRIPTION The swale best management practice (BMP) functions as a soil and plant‐based filtration and infiltration feature that removes pollutants through a variety of natural physical, biological, and chemical treatment processes. Vegetated swales are open, shallow channels with vegetation covering the side slopes and bottom that collect and slowly convey runoff flow to downstream discharge points. They are designed to treat runoff through filtering by the vegetation in the channel, filtering through a subsoil matrix, and/or infiltration into the underlying soils. They trap particulate pollutants (suspended solids and trace metals), promote infiltration, and reduce the flow velocity of storm water runoff. Vegetated swales can serve as part of a storm water drainage system and can replace curbs, gutters and storm sewer systems. ADVANTAGES
• Can achieve both water quality and volume capture objectives.
FACT SHEET‐ VEGETATED SWALE
A‐104 Low Impact Development Technical Design Manual
• Vegetated swales provide storm water treatment that enhances the quality of downstream water bodies by using natural processes.
• The vegetation reduces heat island effects and improves an area's landscape. • Vegetated swales can be designed to convey high flow as well as water quality flow.
LIMITATIONS • Can be difficult to avoid channelization, which may cause erosion and limit infiltration
potential. • May not be appropriate for industrial sites or locations where spills may occur. • Grassed swales cannot treat a very large drainage area. Large areas may be divided and
treated using multiple swales. • A thick vegetative cover is needed for these practices to function properly. • Not effective and may even erode when flow velocities are high, if the grass cover is not
properly maintained. • Swales are more susceptible to failure if not properly maintained than other treatment
BMPs. • Should not be used in areas of know contamination. If soil and/or groundwater
contamination is present on the site or within a 100’ radius of the proposed BMP location, the North Coast Regional Water Quality Control Board will need to be contacted and the site reviewed.
• Should not be used in areas of slope instability where infiltrated storm water may cause failure. Slope stability should be determined by a licensed geotechnical engineer.
• Do not use in locations that can negatively impact building foundation or footings. Location shall be approved by a licensed Geotechnical Engineer.
KEY DESIGN FEATURES • The longest flow path for the swale shall have a minimum retention time of 12 minutes for
conditions when the treatment flows enter the Vegetated Swale uniformly along the swale length. The longest flow path for the swale shall have a minimum retention time of 5 minutes if 90 percent or more of the treatment flow enters the swale at the upstream end.
• Swale should be designed so that the water level does not exceed 2/3rds the height of the grass or 4 inches, whichever is less, at the design treatment rate.
• Longitudinal slopes between 1% and 2.5% are recommended. • Maximum allowable slope is 8% slope. In steep areas, check dams up to 24‐inches high and
at least 25 feet apart are allowed. • Trapezoidal channels are normally recommended but other configurations, such as
parabolic, can also provide substantial water quality improvement and may be easier to mow than designs with sharp breaks in slope.
• Swales constructed in cut are preferred, or in fill areas that are far enough from an adjacent slope to minimize the potential for gopher damage. Do not use side slopes constructed of fill, which are prone to structural damage by gophers and other burrowing animals.
A‐105
• A divthe sbe spcorretoleraswalearea.
• Vegeof 10wide great
• The bswale
• If veggeofaof the
• Vege• The s
Adjaccurb
• If theperm
• If usebed u
SIZING D
• Tvoretr
• If
• Aw
FA
City of Sant
erse selectiopecific site, pecified. Vegesponds to thant vegetaties that are n tated swales0 feet. The veand no morter width is nbed of the swe. Side slopegetation is noabric shall bee year, sod stated swale swale shall ccent to streeelevation. (Ie 10 or 100‐ymanent geofaed, the perfounderneath
DESIGN‐ GOA
he design goolume of runetention reqreatment is f the design g
o Wate24 hointens
o Volumwaterevent
All calculationwww.srcity.o
ACT SH
ta Rosa and C
on of low groclimatic, andgetation whohe wet seasoon should bnot part of a
s shall have egetated swre than 7‐feeneeded. wale flow ares shall be noot establishee placed on shall be placshall be sizeonvey the 1ets, the 100‐nclude flowyear storm eabric liner shorated pipe tand 6‐inch c
AL AND REQ
oal for vegetnoff generatquirement. Ifrequired. goal is not ar Quality Treur storm evesity of 0.20 ime Capture (r due to deve. This is a rens shall be corg/stormwa
HEET‐ V
County of Son
owing, plantd watering cose growing on are prefee consideredregularly irr
a maximumale bed shalet wide. Para
ea shall slopo greater thaed by Octobswale surfaced over loosed using the 0‐year stormyear storm e in the gutteevent flow vehall be used trench shall cover.
QUIREMENTS
tated swale ted by the 85f 100% volum
achievable, teatment of ent, as calcunches per ho(infiltration elopment getention requompleted usaterLID
VEGETA
oma
ts that thriveconditions shseason erred. Drougd especially rigated lands
treatment wll be at least allel swales m
pe at about 2an a 2 to 1 ser 1st, a 1‐yce. If vegetatse soils. spreadshee
m event withevent shall ber in the calcelocity is grethat is ratedbe backfilled
S
is to capture5th percentilme capture i
hen the veg100% of theulated using our, and and/or reusenerated by uirement. sing the “Sto
ATED Se under hould
ght for scaped
width 2‐feet may be used
2% from toelope. ear biodegration is not e
et provided bh flows contabe conveyedculation.) eater than 4 d for the calcd with ¾” cr
e (infiltrationle 24 hour stis achieved t
getated swale flow generathe Rationa
e) of the incthe 85th pe
orm Water C
WALE
d if calculatio
of side slop
adable loosestablished b
by the local aained withind with flows
feet per secculated flowushed rock w
n and/or reutorm event. than no add
e sizing requated by the 8l Method an
crease in volercentile 24 h
Calculator” a
ons show
pe to center
e weave by October 1
agency. n the swale. below the to
cond, a velocity. with a 2‐inch
use) 100% ofThis is a itional
uirement is:85th percennd a known
ume of stormhour storm
available at
of
15th
op of
h
f the
ntile
m
FACT SHEET‐ VEGETATED SWALE
A‐106 Low Impact Development Technical Design Manual
INSPECTION AND MAINTENANCE REQUIREMENTS A maintenance plan shall be provided with the Final SUSMP. The maintenance plan shall include recommended maintenance practices, state the parties responsible for maintenance and upkeep, specify the funding source for ongoing maintenance with provisions for full replacement when necessary and provide site specific inspection checklist. At a minimum maintenance shall include the following:
• Mow and irrigate during dry weather to the extent necessary to keep vegetation alive. Where 6‐inch high grasses are used, the grass height shall be at least 3 inches after mowing. Where mowed grasses are shown, the grass height shall be mowed when the height exceeds 3 inches.
• Remove obstructions and trash from vegetated swale. • Pesticides and fertilizers shall not be used in the swale.
Vegetated Swales shall be inspected and maintained monthly during the rainy season to review:
• Obstructions and trash. • Ponded flow is drained within 72 hours after a rainfall event. • Condition of grasses. • If ponding is observed, grading will be required to restore positive drainage.
VEG
ETATED SWALE ‐ CH
ECKLIST
A‐107
City of Santa Rosa and Co
unty of Son
oma
Vegetated
Swale
Date of Inspectio
n:
Inspectio
n and Mainten
ance Che
cklist
Inspector(s):
(aka
: Bioretention Sw
ale, Treatmen
t Swale, Grassy Sw
ale)
BMP ID #:
Prop
erty Owne
r:
Locatio
n Descriptio
n:
Type
of Inspe
ction: � Pre‐rainy
Season (PRS) � Rainy
Season (RS) � After‐rainy
Season (ARS)
This Inspectio
n an
d Maintenan
ce Checklist is to be used
in con
junctio
n with
its correspo
nding LID Factsheet and
Maintenan
ce Plan. Please review
these do
cuments before performing the fie
ld inspectio
n.
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance
completed
and
if neede
d mainten
ance was
not con
ducted
, note whe
n it will be do
ne)
Drainage
RS
Is th
ere standing
or po
oling of
water after 3 days of dry
weather?
•
Remove any ob
struction in th
e sw
ale
and/or regrade
to restore positive
drainage.
RS
Is th
ere po
or drainage du
ring
a
high
intensity
storm
event?
•
Clean the High Flow
Bypass Inlet.
• Ch
eck pipe
for damage and/or
blockage. R
epair if requ
ired
.
RS
Is th
e flo
w into th
e vegetativ
e sw
ale even
and
uniform
? •
Remove any ob
struction preven
ting a
unifo
rm flow
into th
e sw
ale.
VEG
ETATED SWALE ‐ CH
ECKLIST
A‐108
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Erosion
RS
ARS
Is th
ere un
der cutting or
washo
uts alon
g the
impe
rvious surfaces abuttin
g the Vegetative Sw
ale?
• Fill in erode
d areas and regrade.
RS
ARS
Is th
ere channe
lization (gully)
form
ing alon
g the length of the
sw
ale area?
• Fill in erode
d areas and regrade.
RS
ARS
Is th
ere accumulation of
sedimen
t (sand
, dirt, m
ud) in
the sw
ale?
• Re
move sedimen
t and
che
ck th
e grading. A
dd rep
lacemen
t soil
and/or m
ulch.
PRS
RS
ARS
Is th
e mulch une
venly
distribu
ted in th
e Ve
getativ
e Sw
ale area?
• Re
distribu
te and
add
add
ition
al
mulch if neede
d.
• Re
grade area.
PRS
RS
ARS
Are th
ere voids and/or holes
arou
nd th
e High Flow
Bypass
Inlet?
• Inspect the
High Flow
Bypass pipe
and Inlet b
ox fo
r damage. Rep
lace
or rep
air as necessary.
PRS
RS
ARS
Is th
ere eviden
ce of a
nimal
activ
ity such as holes or dirt
mou
nds from
digging
or
borrow
ing?
• Re
pair and
fill in dam
aged
areas.
• Ro
dent con
trol activities m
ust b
e in
accordance with
app
licab
le laws
and do
not affect a
ny protected
species.
VEG
ETATED SWALE ‐ CH
ECKLIST
A‐109
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Vegetation
PRS
RS
ARS
Is th
e vegetatio
n clogging
or
redirecting the inlet/ou
tlet
flow areas?
• Trim
and
/or remove the excess
vegetatio
n.
PRS
RS
ARS
Is th
e mulch distributed
even
ly th
rougho
ut th
e sw
ale
area?
• Re
distribu
te and
add
add
ition
al
mulch if neede
d.
• Re
grade planter a
rea.
PRS
RS
ARS
Are th
ere de
ad or dry
plants/w
eeds?
Is th
e vegetatio
n over grown?
• Re
move de
ad and
/or dry
vegetatio
n. Rep
lace as ne
eded
. • Re
move or trim
any
vegetation that
is causing
a visual barrier, trip, and
or obstructio
n hazards.
• Mow
grass as ne
eded
.
VEG
ETATED SWALE ‐ CH
ECKLIST
A‐110
City of Santa Rosa and Co
unty of Son
oma
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
BMP General
PRS
RS
ARS
Is th
ere de
bris/trash in
the
planter/sw
ale area?
• Re
move all trash and
deb
ris.
PRS
RS
ARS
Is Graffiti present?
• Re
move all graffiti from
the area.
PRS
RS
ARS
Are th
ere missing
or disturbe
d aesthe
tics features?
• Re
place and/or rep
osition
aesthe
tics features to
original
placem
ent.
• Placem
ent sho
uld no
t disrupt flow
characteristics/de
sign.
PRS
RS
ARS
Is th
e vegetatio
n irrigatio
n functio
nal?
• Re
paired
broken missing
spray/drip
emitters.
• Re
positio
n and/or adjust to
elim
inate over spray and
/or over
watering.
PRS
RS
ARS
Are th
e aesthe
tic fe
atures
firmly secured
in placed?
• Re
pair and
/or replace loose or
damaged
features.
PRS
RS
ARS
Check for damaged
sidew
alk,
curb, gutter, and
catch basin.
This includ
es uplift and
settling.
• Re
move and replace damaged
areas.
A‐112
FLOW Also know
DESCRIPT Flow ThrpollutantFlow Thrstorm wa ADVANT
• P• C• U• U• P
FACT
City of Sant
THROUGw as: Above
TION
ough Plantets through a ough Planteater from ro
TAGES
rovides watan be used a
Used in urbanUsed on sloperovides hab
T SHEET
ta Rosa and C
GH PLANT Ground Bio
ers function avariety of n
ers are usualoftops.
er quality treas part of a tn areas wheed sites. itat for birds
T‐ FLOW
County of Son
TER oretention, F
as a soil andatural physily installed n
eatment. treatment trre space is li
s and attract
W THRO
oma
Filter Planter
plant‐basedcal, biologicnext to build
rain with volimited.
ts pollinator
OUGH
r, and Water
d filtration fecal, and chemdings or com
lume captur
s like butter
PLANT
r Quality Pla
eature that mical treatmmmon open a
re BMPs.
rflies and bee
TER
nter
removes ment processareas to trea
es.
es. at
FACT SHEET‐ FLOW THROUGH PLANTER
A‐113 Low Impact Development Technical Design Manual
LIMITATIONS
• Do not achieve volume capture/infiltration requirements. • Impacts to adjacent buildings and overflow requirements need to be considered in
design. • Plant selection needs to consider effects of fast draining soils.
KEY DESIGN FEATURES
• Bottom shall be impervious to protect adjacent structures and slope stability, unless otherwise approved by a licensed Geotechnical Engineer. If designed to allow infiltration, the underlying soil will need to be tested to determine the infiltration rate and should not be compacted.
• Include plants suited to the unique conditions in the planter and design to achieve 51% cover.
• Install a designated high flow bypass inlet or route. • Underdrain required. • Designed to prevent standing water. All surface water must drain within 72 hours to
prevent mosquito breeding. • Select non‐floatable surface mulching material to prevent clogging of downstream
inlets. • Downspouts to incorporate splash blocks and/or other dissipation methods to prevent
erosion.
SIZING DESIGN‐ GOAL AND REQUIREMENTS (Applies to all tributary areas with impervious surfaces)
• Water Quality Treatment of 100% of the flow generated by the 85th percentile 24 hour storm event, as calculated using the Rational Method and a known intensity of 0.20 inches per hour.
• All calculations shall be completed using the “Storm Water Calculator” available at www.srcity.org/stormwaterLID.
INSPECTION AND MAINTENANCE REQUIREMENTS
A maintenance plan shall be provided with the Final SUSMP. The maintenance plan shall include recommended maintenance practices, identify the parties responsible for maintenance and upkeep, specify the funding source for ongoing maintenance with provisions for full replacement when necessary and provide site specific inspection checklist. At a minimum inspection and maintenance shall include the following: • Inspect twice annually for ponded water. If ponded water is observed, the perforated
pipe shall be cleaned.
FACT SHEET‐ FLOW THROUGH PLANTER
A‐114 City of Santa Rosa and County of Sonoma
• If ponded water remains, further grading and replacement may be necessary to prevent mosquito breeding.
• The high flow inlet should be inspected and cleaned as necessary to remove any obstructions.
• Pesticides and fertilizers shall not be used in the rain garden area. • Plants should be pruned, weeds pulled and dead plants replaced as needed. • Check downspout splash blocks for proper location and fill/regard any washouts. • Evaluate mulching around plants. Add/replace as needed.
FLOW THRO
UGH PLA
NTER ‐ C
HEC
KLIST
A‐115
City of Santa Rosa and Co
unty of Son
oma
Flow
Throu
gh Planter
Date of Inspectio
n:
Inspectio
n and Mainten
ance Che
cklist
Inspector(s):
(aka
: Abo
ve Groun
d Bioreten
tion, Filter Planter, W
ater Quality Planter)
BM
P ID #:
Prop
erty Owne
r:
Locatio
n Descriptio
n:
Type
of Inspe
ction: � Pre‐rainy
Season (PRS) � Rainy
Season (RS) � After‐rainy
Season (ARS)
This Inspectio
n an
d Maintenan
ce Checklist is to be used
in con
junctio
n with
its correspo
nding LID Factsheet and
Maintenan
ce Plan. Please review
these do
cuments before performing the fie
ld inspectio
n.
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance
completed
and
if neede
d mainten
ance was
not con
ducted
, note whe
n it will be do
ne)
Drainage
RS
Is th
ere standing
or po
oling of
water after 3 days of dry
weather?
•
Check pe
rforated
pipe ou
tlet for
obstruction or dam
age.
• Flush pe
rforated
pipe to rem
ove
obstructions.
• Re
move and replace the first fe
w
inches of top
soil.
• Re
move all the
soil and
inspect
perforated
pipe. Rep
air or rep
lace
perforated
pipe, rep
lace with
new
soil
and re‐grade
.
RS
Is th
ere overflo
w due
to
excessive splashing/spray?
•
Repo
sitio
n splash block or dissipater
to red
uce or elim
inate splash/spray
overflo
w.
RS
Is water overflowing the side
s of th
e planter u
nit d
uring major
storm events?
•
Check ou
tlet a
rea for ob
struction or
damage.
• Ch
eck High Flow
Bypass inlet p
ipe for
obstruction or dam
age.
FLOW THRO
UGH PLA
NTER ‐ C
HEC
KLIST
A‐116
Low Im
pact Develop
men
t Techn
ical Design Manual
Inspection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Erosion
RS
ARS
Is th
ere un
der cutting or
washo
uts arou
nd th
e inlet
splash block(s)?
• Re
‐position
the inlet splash block(s)
or dissipater(s).
• Fill in erode
d areas and re‐grade
.
RS
ARS
Is th
ere channe
lization (gully)
form
ing alon
g the length of the
planter area?
• Re
‐position
the inlet splash block or
dissipater. R
e‐grade planter area.
RS
ARS
Is th
ere accumulation of
sedimen
t (sand
, dirt, m
ud) in
the planter?
• Re
move sedimen
t and
che
ck th
e grading. A
dd rep
lacemen
t soil and
or m
ulch.
PRS
RS
ARS
Is th
e mulch une
venly
distribu
ted in th
e planter a
rea?
• Re
‐distribute and add additio
nal
mulch if neede
d.
• Re
‐grade
planter area.
FLOW THRO
UGH PLA
NTER ‐ C
HEC
KLIST
A‐117
City of Santa Rosa and Co
unty of Son
oma
In
spection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
Vegetation
PRS
RS
ARS
Is th
e vegetatio
n clogging
the
Inlet/ou
tlet a
reas?
• Trim
and
/or remove the excess
vegetatio
n arou
nd th
e inlet/ou
tlet
areas.
PRS
RS
ARS
Is th
e mulch spread even
ly
througho
ut th
e planter area?
• Re
‐distribute and add additio
nal
mulch if neede
d.
• Re
‐grade
planter area.
PRS
ARS
Are th
ere de
ad or dry
plants/w
eeds?
• Re
move de
ad and
/or dry
vegetatio
n. Rep
lace as ne
eded
. • Re
move or trim
any
vegetation that
is causing
a visual barrier hazard.
FLOW THRO
UGH PLA
NTER ‐ C
HEC
KLIST
A‐118
City of Santa Rosa and Co
unty of Son
oma
In
spection
Ca
tegory
Whe
n to
Inspect
Mainten
ance Issue
Is th
e Issue
Presen
t?
Requ
ire Mainten
ance
Commen
ts (D
escribe mainten
ance com
pleted
and if ne
eded
mainten
ance was not con
ducted
, no
te whe
n it will be do
ne)
BMP General
PRS
RS
ARS
Is th
ere de
bris/trash in
the
planter area?
• Re
move all trash and
deb
ris.
PRS
RS
ARS
Is th
e planter and/or
surrou
nding area
marked with
graffiti?
• Re
move all graffiti from
the area.
PRS
RS
ARS
Are th
ere missing
or disturbe
d aesthe
tics features?
• Re
place and/or rep
osition
aesthe
tics features to
original
placem
ent.
• Placem
ent sho
uld no
t disrupt flow
characteristics/de
sign.
PRS
RS
ARS
Check for broken
or damaged
drain inlets/outlets, splash
blocks, and
grates.
• Re
place or rep
air all dam
age
features.
PRS
RS
ARS
S
Is th
e vegetatio
n irrigatio
n functio
nal?
• Re
paired
broken missing
spray/drip
emitters.
• Re
positio
n to elim
inate over spray
and/or over watering.
PRS
RS
ARS
Are th
ere cracks, holes, and
/or
damage side
s, to
p of th
e planter un
it?
• Re
pair or replace un
it. Rep
airs m
ust
be watertig
ht.
PRS
RS
ARS
Are th
e aesthe
tic fe
atures
firmly secured
in placed?
• Re
pair and
/or replace loose or
damage features.
A‐120
PROPRAlso knowUnits.
GENERAL Proprietawater qudesignedpollutantremovedProprieta
FA
City of Sant
RIETARY Uw as: Structu
L DESCRIPTI
ary units, or uality needs.d to target a ts. Proprietad as part of pary typically
ACT SH
ta Rosa and C
UNITS ural Units, P
ON
manufactur They are geparticular pary units canpretreatmenprovide trea
EET‐ PR
County of Son
Physical Sepa
red units, veenerally consollutant, suc be very usent or where satment, but
ROPRIE
oma
arators, Pref
ry in design structed offsch as hydroceful when a pspace is limitnot volume
GM
Awprdmfwwin
ETARY
fabricated U
and use to ssite and are carbons, whiparticular poted as part o capture.
GENERAL INSMAINTENAN
A maintenanwith the Finaplan shall incecommendedesignation omaintenanceunding sourwith provisiowhen necessnspection ch
UNITS
nits, and Ma
serve a wideinstalled as ile others reollutant needof a treatme
SPECTION ANCE REQUIRE
nce plan shalal SUSMP. Thclude the maed maintenaof parties ree and upkeerce for ongoions for full resary and prohecklist.
S
anufactured
e variety of sa unit. Somemove multipds to be nt train.
AND EMENTS
ll be providehe maintenaanufacturersance practicesponsible fop, specify thing maintenaeplacement vide site spe
storm e are ple
ed ance s es, or he ance
ecific
FACT SHEET‐ PROPRIETARY UNITS
A‐121 Low Impact Development Technical Design Manual
CHAMBERED SEPERATOR UNITS Use the properties of different pollutants to remove each in a separate chamber. As such, these units tend to be larger. They can either be inline with the storm drain system, or offline. An access point must be provided to each chamber for maintenance purposes. These units must be maintained with a vacuum truck.
TRASH EXCLUDERS Use screens or other physical filtration to prevent trash from entering the storm drain system. The collected trash can either be stored in a portion of the inlet or in the curb. High flow bypass must be provided to prevent clogging and backup. These units must be maintained with a vacuum truck.
FILTER INSERTS Use bags and/or fabric or other physical filtration to filter out trash, sediment, and/or hydrocarbons. Some filter inserts are designed to remove particular pollutants. High flow bypass must be provided to prevent backup.
FACT SHEET‐ PROPRIETARY UNITS
A‐122 City of Santa Rosa and County of Sonoma
CENTRIFUGAL SEPERATOR UNITS Use curved baffles to direct storm water so that centrifugal force drops sediment and debris out and usually use screens to collect floatable material. These units can be either inline with the storm drain system or offline. These units must be maintained with a vacuum truck.
TREE FILTER UNITS Are combination units that use both structural and biological elements to clean storm water. They generally consist of a concrete vault filled with a special soil mix that a tree or shrub is planted in. Storm water is directed into the unit, filtered through the soil, and collected in a perforated pipe and conveyed to the storm drain system. High flow bypass must be provided for high intensity rain events.
APPENDIX F
City of Santa Rosa and County of Sonoma
PLANT AND TREE LISTS
APPENDIX F
Botanical Name Common Name Low
Zone
Mid Z
one
High Z
one
Vege
tated
Swale
s
Bioret
entio
nEx
tende
d Dete
ntion
Basin
Vege
tated
Buffe
r
Cons
tructe
d Wetl
and
Toler
ates S
aturat
ion
Drou
ght T
oleran
t
WUCO
LSLik
ely W
UCOL
S if n
ot
rated Other Notes
Grasses and Grass‐like PlantsAgrostis exarata spike bentgrass X X Yes Yes Yes NR MAlopecurus aequalis short awn foxtail X X Yes Yes NR M `Alopecurus saccatus Pacific foxtail X X Yes Yes NR MBromus carinatus California brome X X Yes Yes Yes NR LCarex barbarae Santa Barbara sedge X X Yes Yes Yes Yes Yes Yes Yes M Not for full sunCarex brevicaulis short stem sedge X X Yes Yes Yes Yes Yes M Short turf‐like growth habit Carex densa dense sedge X X Yes Yes Yes Yes Yes Yes MCarex deweyanna Dewey sedge X X Yes Yes Yes Yes Yes Yes MCarex divulsa Berkeley sedge X X Yes Yes Yes Yes Yes Yes M Not a native. Mistakenly sold as the native C. tumulicolaCarex obnupta slough sedge X X Yes Yes Yes Yes Yes Yes MCarex pansa California meadow sedge X X Yes Yes Yes Yes Yes Yes Yes MCarex rupestris curly sedge X X Yes Yes Yes Yes Yes Yes MCarex stipata sawbeak sedge X X Yes Yes Yes Yes Yes Yes MCarex subfusca rusty sedge X X Yes Yes Yes Yes Yes Yes MCarex testacea New Zealand orange sedge X X Yes Yes Yes Yes Yes Yes MCarex tumulicola foothill sedge X X X Yes Yes Yes Yes Yes Yes Yes MCarex vesicaria inflated sedge X X Yes Yes Yes Yes Yes Yes MDanthonia californica California oatgrass X X Yes Yes Yes NR LDeschampsia danthonoides annual hairgrass X X Yes Yes Yes Yes Yes Yes NR L Can tolerate saturation if top soil layer drainsDeschampsia cespitosa tufted hairgrass X X Yes Yes Yes Yes Yes NR L Can tolerate saturation if top soil layer drainsDistichlis spicata salt grass X X Yes Yes Yes Yes NR MEleocharis acicularis needle spike rush X X Yes Yes Yes Yes Yes Yes NR MEleocharis macrostachya creeping spike rush X X Yes Yes Yes Yes Yes Yes NR MEleocharis ovata ovate spike rush Yes Yes Yes Yes Yes Yes NR MEleocharis palustris creeping spike rush Yes Yes Yes Yes Yes Yes NR MElymus glaucus blue wild rye X X Yes Yes Yes Yes Yes Yes Yes LFestuca californica California fescue X Yes Yes Yes Yes Yes L Can tolerate saturation if top soil layer drainsFestuca idahoensis blue bunchgrass X Yes Yes Yes Yes Yes Yes VL Can tolerate saturation if top soil layer drainsFestuca rubra red fescue X Yes Yes Yes Yes Yes Yes L Can be mowed as turf alternative. Can tolerate saturation if top soil layer drainsGlyceria occidentalis western mannagrass X X Yes Yes Yes Yes Yes Yes Yes NR HHordeum brachyantherum meadow barley X X Yes Yes Yes Yes Yes NR M Can tolerate saturation if top soil layer drainsJuncus balticus Baltic rush X X Yes Yes Yes Yes Yes HJuncus bufonis toad rush X X Yes Yes Yes Yes Yes Yes HJuncus effusus Pacific rush X X Yes Yes Yes Yes Yes Yes HJuncus ensofolius dagger leaf rush X X Yes Yes Yes Yes Yes Yes HJuncus patens blue rush X X X Yes Yes Yes Yes Yes Yes Yes H L May not need summer irrigation after establishmentJuncus tenuis slender rush X X Yes Yes Yes Yes Yes Yes Yes HJuncus xiphiodes iris‐leaved rush X X Yes Yes Yes Yes Yes Yes HLeymus triticoides creeping wild rye X X Yes Yes Yes Yes Yes Yes Yes VL Can be mowed. Ideal plant for many uses.Melica californica California melic X Yes Yes Yes Yes Yes Yes NR L Can tolerate saturation if top soil layer drainsMelica imperfecta small flowered melic X Yes Yes Yes Yes Yes Yes NR L Can tolerate saturation if top soil layer drainsMuhlenbergia rigens deergrass X Yes Yes Yes Yes Yes LNassella lepida foothill needlegrass X Yes Yes Yes Yes VLNassella pulchra purple needlegrass X Yes Yes Yes Yes VLPhalaris californica California canary grass X X X Yes Yes Yes Yes Yes Yes MPleuropogon californicus semaphore grass Yes Yes NR HScirpus americanus three square X Yes Yes Yes NR HScirpus californicus California bulrush X Yes Yes Yes NR HTypha angustifolia narrowleaf cattail X Yes Yes Yes NR HTypha latifolia cattail X Yes Yes Yes NR H
Grasses and Grass‐like Plants
A‐123
APPENDIX F
Botanical Name Common Name Low
Zone
Mid Z
one
High Z
one
Vege
tated
Swale
sBio
reten
tion
Exten
ded D
etenti
on Ba
sin
Vege
tated
Buffe
rCo
nstru
cted W
etlan
dTo
lerate
s Satu
ration
Drou
ght T
oleran
tWU
COLS
Likely
Wuc
ols
Other Notes
Herbaceous PlantsAchilea millefolium common yarrow X Yes Yes Yes LAster sp. aster X X Yes Yes Yes MAthyrium filix‐femina lady fern X X Yes Yes Yes MBlechnum spicant deer fern X X Yes Yes Yes Yes Yes LCamassia leichtilinii camas lily X X Yes Yes Yes NR HCamassia quamash common camas X X Yes Yes Yes NR HEpilobium canum California fuschia X Yes Yes Yes* Yes LEriogonum fasciculatum flattop buckwheat X Yes Yes Yes LEschscholzia californica California poppy X Yes Yes Yes VLFragaria chiloensis beach strawberry X Yes Yes Yes Yes Yes M L This species is adapted to low water conditionsIris douglasiana Douglas iris X X Yes Yes Yes Yes Yes LLupinus bicolor miniature lupine X Yes Yes Yes Yes Yes NR L Tolerates saturation in winter onlyLupinus polyphyllus large leaf lupine X X Yes Yes Yes Yes NR M similar to Russell hybridsMimulus guttatus X Yes Yes Yes Yes HPolypodium californicum California polypody X X Yes Yes Yes Yes VLPolypodium glycrrhiza licorice fern X X Yes Yes Yes Yes VLPolystichum californicum California sword fern X X X Yes Yes Yes Yes Yes Yes Yes LPolystichum munitum western sword fern X X X Yes Yes Yes Yes Yes Yes MPteridiumn aquilinum bracken fern X X Yes Yes Yes Yes MSisyrinchium bellum blue‐eyed grass X Yes Yes Yes Yes Yes VLSisyrinchium californicum yellow‐eyed grass X X Yes Yes Yes Yes MVeronica liwanensis speedwell X Yes Yes Yes M
Herbaceous Plants
A‐124
APPENDIX G
Low Impact Development Technical Design Manual
SAMPLE PERVIOUS CONCRETE SPECIFICATIONS
APPENDIX G
A‐125 City of Santa Rosa and County of Sonoma
PERVIOUS CONCRETE‐ SAMPLE SPECIFICATION
DESCRIPTION
Pervious concrete surfaces shall conform to the requirements of the May 2006 Standard Specifications of the State of California, Department of Transportation. Pervious concrete shall be truck‐mixed, ready‐mixed concrete consisting of a mixture of Type II Portland Cement complying with ASTM C150, aggregate, and water. The proportions of the water and aggregate shall be regulated so as to produce a plastic, workable, and cohesive mixture. The pervious concrete shall be placed by the Contractor within one hour of initial mixing unless otherwise approved by the Engineer.
PLACEMENT AND CONSOLIDATION
Pervious concrete shall be installed by Contractors certified at Craftsman level per “Pervious Concrete Contractor Certification, NRMCA Publication #2 PPECT.”
Placement shall be a continuous operation and shall be completed as quickly as possible. Concrete shall be deposited as close to its final position as practicable. The practice of discharging onto subgrade and pulling or shoveling to final placement is not allowed. Contractor shall submit a proposed placement and consolidation method to the Engineer one week prior to placement. Placement shall not proceed without approval of placement method by the Engineer. Placement and consolidation shall conform to publication “Pervious Concrete Pavements”, 2004, Portland Cement Association and National Ready Mix Concrete Association.
CEMENT
Pervious concrete shall contain at least 658 pounds of Portland Cement per cubic yard and shall have a minimum 28‐day compressive strength of 3000 pounds per square inch.
AGGREGATE
The aggregate shall meet the requirements of ASTM C33 and the following grading:
Sieve Size Percent Passing ½” 100 3/8” 85‐10 #4 10‐30 #8 0‐10 #16 0‐5
APPENDIX G
A‐126 Low Impact Development Technical Design Manual
METHOD OF CURING
Curing procedures shall begin within 20 minutes after final placement operations. The pavement surface shall be covered with a minimum six (6) mil think polyethylene sheet or other approved covering material. Prior to covering, a fog or light mist shall be sprayed above the surface when required due to ambient conditions (temperature, wind, humidity). The cover shall overlap all exposed edges and shall be secured (without using dirt or stone) to prevent dislocation due to winds or adjacent traffic conditions. Pervious concrete shall be cured for seven (7) days minimum. No traffic shall be allowed for 10 days.
APPENDIX H
City of Santa Rosa and County of Sonoma
FINAL SUSMP SUBMITTAL GUIDE
APPENDIX H
Final SUSMP Submittal Guide
A‐127 City of Santa Rosa and County of Sonoma
PROJECT INFORMATION
Applicant Name (owner or developer)
Mailing Address
City/State/Zip
Phone/Email/Fax
Project Name
Site Address
City/State/Zip
Permit # (s)
Engineer Name
Mailing Address
City/State/Zip
Phone/Email/Fax
TYPE OF APPLICATION/PROJECT
Subdivision Grading Permit Building Permit Design Review Use Permit Other
WHAT YOUR FINAL PLAN MUST INCLUDE
NARRATIVE
Project Description
□ Description of proposed project type, location, and any specific uses or features. □ Description of any sensitive features (creeks, wetlands, trees, etc) and weather they are going to be preserved,
removed or altered. □ Description of the existing site. □ Description of how this project triggers these requirements (impervious area, CALGreen, 401 Permit*, etc).
APPENDIX H
Final SUSMP Submittal Guide
A‐128 Low Impact Development Technical Design Manual
Pollution Prevention and Credits
□ Description of all proposed pollution prevention measures (street sweeping, covered trash enclosures, indoor uses, etc).
□ Description of all credits utilized (Interceptor Trees, Impervious Area Disconnection, and/or Alternative Driveway Design).
□ Summary of tributary area reduction due to credits.
Type of BMPs proposed
□ Description of the types of BMPs selected including priority group that each is in. □ Description of level of treatment and volume capture achieved (if 100% Capture is achieved treatment is not
required).
Maintenance
□ Description of maintenance for each type of BMP. □ Description of funding mechanism. □ Designation of Responsible Party. □ Copy of signed Maintenance Agreement (appropriate for private BMPs on private land), CC&R language (for
common BMPs on common land), or Special Tax District (for BMPs in the public right‐of‐way).
EXHIBITS AND ATTACHMENTS
Completed BMP Selection Table
□ Completed BMP Selection Table for each tributary area including explanation for each Priority not used.
Proposed SUSMP Exhibit
□ Exhibit should include: street names, property lines, storm drainage system, waterways, title block, scale, and north arrow.
□ Tributary areas shown for all inlets (including offsite drainage areas). □ C value for each tributary area. □ Soil Type of existing site. □ New or replaced impervious area. □ All inlets shown (including identifier). □ All interceptor trees shown. □ All proposed BMPs shown.
APPENDIX H
Final SUSMP Submittal Guide
A‐129 City of Santa Rosa and County of Sonoma
Existing Condition Exhibit
Not necessary if no impervious area existed on the undeveloped site or if the Design Goal of 100% Volume Capture is achieved.
□ Exhibit should include: street names, property lines, proposed storm drainage system, waterways, title block, scale, and north arrow.
□ Soil Type of existing site. □ Proposed tributary areas shown for all proposed inlets (including offsite drainage areas).Existing impervious
areas. ON PLANS
□ All applicable elements appear on the appropriate plan sheets
CALCULATIONS □ Storm Water Calculator