1

Addendum

Quality Assurance Project Plan

Sequim-Dungeness Watershed Water Pollutant Concentration

Pilot Sampling Project

by

Edward Chadd, Clallam County Department of Community Development

Robert Knapp, Clallam County Department of Community Development

Carol Creasey, Clallam County Department of Community Development

Clallam County Department of Community Development

223 East 4th

Street, Suite 5

Port Angeles, Washington 98362-3015

September 2009

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Publication Information

Within a month of publication, this addendum will be available on Clallam County’s website at

http://www.clallam.net/streamkeepers/html/reports.asp. Go to the link labeled “Stormwater

Monitoring.”

The project plan that is amended by this document can be found at

http://www.clallam.net/streamkeepers/assets/applets/QAPP_Approved.pdf

All data gathered under this project will be available by January 2011 from these websites:

• Clallam County: http://www.clallam.net/streamkeepers/html/reports.asp, “Stormwater

Monitoring” link

• WA Dept. of Ecology: http://www.ecy.wa.gov/eim/

• U.S. Environmental Protection Agency: http://www.epa.gov/storet/dw_home.html

The overall project area is depicted in Figure 1 in the text. Specific sites and watercourses

intended for sampling are listed in Table 2 in the text.

For more information contact:

Robert Knapp

Clallam County Department of Community Development

223 E. 4th

St., Suite 5

Port Angeles, WA 98362-3015

streamkeepers@co.clallam.wa.us

360-417-2416

Clallam County Department of Community Development:

http://www.clallam.net/Departments/html/dept_dcd.htm

dcdadmin@co.clallam.wa.us

360-417-2321

Any use of product or firm names in this publication is for descriptive purposes only

and does not imply endorsement by the authors or their employers.

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Summary of Changes

Between December 24, 2008 and May 15, 2009 Clallam County sampled stormwater runoff at

ten sampling locations in the Sequim-Dungeness valley (See Sequim-Dungeness Watershed

Water Pollutant Concentration Pilot Sampling Project approved in December 2008). We plan to

resume sampling in October 2009, following our existing sampling plan with only minor

changes. Due to our late start last year, we were unable to capture the first storm of the rainy

season. This addendum states our plan to sample storm events early this storm season while

maintaining consistency with our data collected last season.

Changes include;

o Adding one new sampling location which is Dungeness Meadows

o Field sampling for turbidity using only a ratio turbidimeter and not a non-ratio meter

o Minor amendments to our lab QA sample such as eliminating analytical duplicates

o Minor amendments to our storm selection and qualification criteria to include snow-melt

o Schedule update to extend the sampling time period through November 2009

These changes are described in the next few paragraphs and highlighted in the text and tables.

New Sampling Location- Dungeness Meadows

Because of the multiplicity of land uses, potential pollution sources, and stormwater conveyances

in the project area, several study areas are involved, each designed to investigate particular

problems. Each study area is to be considered a sub-project. Figure 1 shows the locations of

these study areas/sub-projects: Agnew, Dungeness Meadows, Lotzgesell, East Sequim,

Meadowbrook, Eureka, and Safeway. We have selected the additional sampling location

(Dungeness Meadows) based on input from our sampling advisory committee. This site (Figure

2) will be sampled primarily to look for pesticides and herbicides and is now included in Table 2

*. Last May (2009), we sampled at two locations where pesticides were the parameters of

interest; the addition of this new site provides us three sites that we can compare during a single

storm event. Page ten of this document provides supporting text for the Dungeness Meadows site

selection.

Field Sampling with Ratio Turbidimeter

For this round of sampling, we will be using only a Hach (Model 2100P) ratio meter for all our

field measurements of turbidity and not both ratio and non-ratio (HF-scientific) meters. We have

completed data collection for side-by-side comparison of ratio and non-ratio turbidimeter with

over 340 side-by-side measurements. Provisional data analyses indicate that the non-ratio and

ratio meters provide similar reading through 100 NTU and then diverged at higher turbidity

levels as was predicted. Additionally, we found the Hach meter to be far easier to work with in

the field compared to the HF-Scientific non-ratio meter. The 2100P is the accepted instrument

used by WA Department of Ecology’s Environmental Assessment Program. Revised text is on

page 11.

*Note that table numbers in this document are non-sequential to retain the numbering of the

corresponding table in the original QAPP document for ease of comparison.

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Quality Assurance

Based on discussions with Stuart Magoon of Manchester Environmental Laboratory, we are

planning to have Manchester perform lab samples for quality assurance as specified in Table 6.

These lab procedures coupled with field replicates and blanks (Table 9 in the QAPP) will

provide us with sufficient QA/QC for a screening-level project.

Inclusion of Snow-melt to Qualification Criteria

Table 1 now includes the affects of snow-melt on runoff and steam stage. Therefore, we have

improved our wording in Table 1 to include snow-melt in the sample collection, selection, and

qualification criteria. Snow-melt induced runoff transports pollutants in a similar manner to

rainfall runoff and so we will treat them similarly.

Update of Schedule

We are extending the sampling period through November 2009 and Table 4 reflects the schedule

for completing field and laboratory work, data entry, and reports.

All other methods, procedures, and tasks shall follow the existing QAPP that was approved in

2008.

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Background/Problem Statement

Figure 1: Study area map.

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Experimental Design

Table 1. Sample collection, selection, and qualification criteria. (“Sampling rotation”

refers to the target interval between sample grabs, beginning with the first sample.)

Site/

basin

hydro-

logic

response

type

Flow

pre-

storm?

Ex-

ample

“Zero-

time”

defined as:

Sam-

pling

rota-

tion

inter-

val

1st

sam-

ple to

sub-

mit to

lab

2nd

sample

to

submit

to lab

3rd

sample

to

submit

to lab

Qualifying

storm **

Fast Y Large-

system

storm

sewer

Observable

flow

increase

30’ Pre-

“Zero-

time”

“Zero-

time” +

30’

“Zero-

time” +

60’

Enough

precipitation

or snow melt

to visibly

increase flow

Fast N Parking

lot

First runoff 30’ “Zero-

time”

+5-30’

1st

sample

+ 30’

Enough rain

or melt to

cause runoff

Medium Y Stream Observable

bank runoff

or stage rise

60’ Pre-

”Zero-

time”

a.s.a.p.

after

“Zero-

time”

Peak

stage

within

1st 12

hr*

0.05” in 12 hr

Medium N Dry

irrigation

ditch

Flow

adequate to

collect

samples

60’ “Zero-

time” +

30-60’

Peak

stage

within

1st 12

hr*

0.05” in 12 hr

Slow Y Pond

outflow

Observable

flow

increase

60’,

then 4

hr.

“Zero-

time” +

60’

Peak

flow

(visit

every 4

hr)

0.1” in 24 hr

Slow N Pond

outflow in

early fall

Observable

outflow

60’,

then 4

hr.

“Zero-

time” +

60’

Peak

flow

(visit

every 4

hr)

0.1” in 24 hr

*Exception—solids samples: collect at/near actual storm peak if possible.

** preceded by 48 hr of no measureable rainfall or melt induced stage rise

Study Areas, Sampling Sites, and Laboratory Parameters

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Table 2. Study areas, sites, and laboratory parameters for analysis. These study area and sites are tentative; see discussion above.

Seasonal timing codes: FF = first flush; LLS = larger, later storms; PLT = post-land-treatment; see “Experimental Design” above.

PAH = Polynuclear aromatic hydrocarbons; Pesticides = PESTMS (Pesticides mass spectrometry) + Herbicides Study area

Sampling site abbrevi-ation

Water-course name

So

urc

e/R

ece

ivin

g w

ate

r NHD Reach Code (if known)

If site is not on a stream, name (if known) of receiving water destination (if known)

NHD Reach Code (if known) of receiving water destination if known (if site is not on a stream)

Ide

al s

ea

so

na

l ti

min

g Hydro-

logic res-ponse time

Flow pre-storm?

Laboratory analytes:

Ba

cte

ria

(fe

ca

l c

oli

form

)

Nu

trie

nts

(N

H3

+

To

tal

P +

NO

2-N

O3

)

So

lid

s (

Su

sp

en

de

d

Se

dim

en

t C

on

c.)

Me

tals

(C

u +

Zn

+

Ha

rdn

es

s)

PA

H s

tan

da

rd lis

t

Pe

sti

cid

es

Pri

ori

ty P

oll

uta

nt

Me

tals

Agnew AgFnHall Agnew Ditch

S Strait of Juan de Fuca

PLT medium N Y Y Y N N Y N

D_Mead-ows

DngMead Spring Creek

R Dungeness River

PLT medium N Y Y Y N N Y N

Lotzgesell LotzWdck Lotzgesell Creek

R 17110020000636 PLT slow N N Y N N N Y N

E_Sequim HldWash Highland Ditch

S 17110020003288 Bell Creek 17110020002095 FF medium Y Y Y Y N N N N

E_Sequim BelBlake Bell Creek R 17110020002095 FF medium N Y Y Y Y* Y N Y

E_Sequim HldHpyVly Highland Ditch

S Johnson Creek 17110020000354 LLS medium Y Y Y Y N N N N

E_Sequim SqBayRd Highland Ditch

S FF fast N Y Y Y Y Y N N

Meadow-brook

MdwCr Meadow-brook Creek

R 17110020000832 LLS medium Y Y Y Y N N N N

Meadow-brook

MdwDtch Highland Ditch

S 17110020005418 Meadow-brook Creek

17110020000832 LLS medium N Y Y Y N N N N

Eureka EurWash Eureka Ditch

S LLS medium Y Y Y Y N N N N

Safeway SfwyCB Storm drain

S FF fast N Y Y Y Y Y N N

*At E_Sequim/BelBlake, the Priority Pollutant Metals suite (As, Ag, Sb, Be, Cd, Cr, Cu, Hg, Pb, Ni, Se, Tl, Zn) will also be analyzed, but only with one

sample per event, with timing described in Table 1 as “A.S.A.P after zero time.” (Budgetary considerations do not allow additional samples.)

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Figure 2 Dungeness Meadows study area

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Study Area: Dungeness Meadows (“D_Meadows”)

This study area focuses on the area surrounding the Dungeness Meadows residential

development. The development is composed of residential dwellings surrounding a private golf

course. Irrigation ditches and landscape water features convey Dungeness River water through

the development. The surrounding land uses include residences, roads, and the golf course. This

site was selected because of suspected pesticide application on the golf course and potential for

runoff transported pollutants.

Objectives of this study include:

• Characterizing storm-event concentrations of pollutants presumed most likely to be found in

Spring Creek, based on upslope land uses (see above).

• Comparing pollutant concentrations in this creek with those draining agricultural lands (see

Agnew study area in QAPP).

• Comparing pollutant concentrations in this creek with those of another site that drains a golf

course (see Lotzgesell study area in QAPP).

• Examining how pollutant levels differ during the course of a storm event, between the

beginning of stage rise and peak flow.

Site location and laboratory parameters to be analyzed (see Figure 2 for orthophoto view):

• DngMead: This site is on Spring Creek just downstream of Dungeness Meadows and just

before the outtake point for Sequim Prairie-Tri Irrigation Association. Water not drawn for

irrigation flows to the Dungeness River. Contributing land uses include residences, roads,

and the golf course.

o Bacteria; Nutrients; Solids; Pesticides

Scheduling

Table 4. Schedule for completing field and laboratory work, data entry, and reports.

Field and laboratory work

Field work completed November 2009

Laboratory analyses completed December 2009

Data review completed December 2010

Database entry

Personnel responsible for Entry into EPA

STORET, ECY Environmental

Information Management, and Clallam

County Water Resources databases

Edward Chadd/Lori DeLorm

Data uploaded to databases December 2010

Final report

Author lead Edward Chadd

Schedule

Draft due to advisory committee November 2010

Final report due on web December 2010

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Quality Objectives

Decision Quality Objectives

Table 6 shows the number and kind of laboratory QA samples for the project. These laboratory

analyses form the basis for quality assessment of project data.

Table 6. Number and Kind of Samples for Laboratory QA.

Parameter Laboratory

Control Sample

Standard Ref-

erence Material

Method

Blank

Matrix Spikes

& Spike

Duplicates

TR* PP metals 1/batch 1/batch 1/batch

1 each/batch Dissolved Copper

and Zinc 1/batch 1/batch 1/batch

Hardness 1/batch 1/batch

Nutrients 1/batch

Herbicides 1/batch 1/batch 1 each/batch

Pesticides 1/batch 1/batch 1 each/batch

PAH (std) 1/batch 1/batch 1/batch 1 each/batch

Fecal Coliform --- --- --- ---

SSC 1/batch 1/batch N/A

*Total Recoverable

Measurement Quality Objectives (MQOs) will be determined from data acceptance limits set by

the WA Dept. of Ecology’s Manchester Laboratory, as well as from laboratory case narratives.

Standard QC samples will be analyzed for metals, nutrients, pesticides, herbicides, PAH and

SSC. These will include field blanks to show background levels associated with the sampling

process, and replicates to indicate field variability. Laboratory QC sample including laboratory

control samples, standard reference material, method blanks, spike and spike duplicates will be

analyzed to show interference of the sample matrix.

Field-parameter measurement procedures

Turbidity will be measured with a ratio turbidimeter. Samples will be analyzed within 48 hours

of collection.

• Hach Model 2100P— Streamkeepers of Clallam County