190805 sapt project description · 8/28/2019 · [email protected] project number drawing number...

DEVELOPMENT APPLICATIONPDPLANPMTD-2019/002787

APPLICANT: Dock 4 Architects

PROPOSAL: Public Toilets

LOCATION: 3 Jetty Road, SOUTH ARM

RELEVANT PLANNING SCHEME: Clarence Interim Planning Scheme 2015

ADVERTISING EXPIRY DATE: 28 August 2019

In addition to the Application Form(s), Certificate of Title(s) and any associated consent documents the following information is available on request:

Nil

The relevant plans and documents can be inspected at the Council offices, 38 Bligh Street, Rosny Park, during normal office hours until 28 August 2019.

Any person may make representations about the application to the General Manager, by writing to PO Box 96, Rosny Park, 7018 or by electronic mail to [email protected]. Representations must be received by Council on or before 28 August 2019.

To enable Council to contact you if necessary, would you please also include a day time contact number in any correspondence you may forward.

Any personal information submitted is covered by Council’s privacy policy, available at www.ccc.tas.gov.au or at the Council offices.

mailto:[email protected]

http://www.ccc.tas.gov.au/

MELBOURNE

L1, 673 Bourke Street

Melbourne, VIC, 3000

(03) 8376 6169

HOBART

L1, 100 Collins Street

Hobart, TAS, 7000

(03) 6231 0469

GPO Box 338

ABN: 62 988 287 460

[email protected]

5 August 2019

To whom it may concern,

SOUTH ARM PUBLIC TOILETS

3 JETTY ROAD, SOUTH ARM, TAS 7022

Please find information below in relation to the operation of the proposed new toilet block at 3 Jetty Road: Hours of Operation

• The toilet block will be open (unlocked) 24 hours, 7 days a week.

• Security lighting will be provided, however will not operate in the hours between 11pm & 6am.

Commercial Vehicle Movements

• Commercial vehicle movements will only be permitted between the hours of 6am & 10am.

Onsite Waste Water

• Please refer to the Geo-Environmental Assessment by GES dated June 2019 for information of on-site

wastewater management.

Please contact us on (03) 6231 0469 if you need further clarification in relation to the above. Kind regards,

Jesse French Dock4 Architects

Received 05.08.2019

mailto:[email protected]

GSPublisherVersion 343.3.20.100

ID

1.01

1.02

1.03

SHEET

SITE PLAN

FLOOR PLAN

ELEVATIONS

REV.

L1, 673 BOURKE STREETMELBOURNE, VIC 3000PH: (03) 8376 [email protected]

SOUTH ARM PUBLIC TOILETS

Project Number: 190219

DEVELOPMENT APPLICATIONStatus

CLARENCE CITY COUNCILfor

Date: Monday, 5 August 2019

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L1, 100 COLLINS STREETHOBART, TAS 7000PH: (03) 6231 [email protected]

HOBART

ARCHITECTSwww.dock4architects.com.au

MELBOURNE

Received 05.08.2019


L1, 673 BOURKE STREETMELBOURNE, VIC, 3000PH: (03)8376 [email protected] Project number

Drawing number

Status

DEVELOPMENT APPLICATIONDate generated

5/08/2019Drawn

JFApproved

RL

Drawing titleSOUTH ARM PUBLIC TOILETS

190219

1.01Revision

Status

ARCHITECTURALSITE PLAN

RevIDChIDChange NameDate

3 JETTY ROAD, SOUTH ARMTASMANIA 7022

CLARENCE CITY COUNCIL

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Accredited Designer: Richard Loney CC 6198Y

L1, 100 COLLINS STREETHOBART, TAS, 7000PH: (03) 6231 [email protected]

HOBART


MELBOURNE

7,700 SETBACK

9,70

0 SET

BACK

11,700 SETBACK

CAR PARKING4 x 5400x2700 SPACES

LOCATION OF EXISTING TOILETBLOCK TO BE DEMOLISHED

ACCESSIBLE CAR PARKING1 x 7800x3200 SPACE

TITLE BOUNDARY 39.62m

TITLE BOUNDARY 29.26m

TITL

E BO

UN

DAR

Y 31

.88m

TITLE BO

UN

DARY 32.00m

JETTY ROAD

3 41 2

9

10

11

12

9

10

11

16,5

00 S

ETBACK

INDICITAVE LINE OF BATTERED EARTH

ROOFING:CUSTOM ORB IN 'NIGHT SKY'

ROOFING:LASERLITE ROOFING

PROPOSEDBUILDING

EXISTING

DRIVEW

AY

EXISTING FIRESTATION

EXISTINGRESIDENCE

-SITE PLAN

1:200

Received 05.08.2019



Drawing number

Status


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1.02Revision

Status

ARCHITECTURALFLOOR PLAN




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HOBART


MELBOURNE

200 2,400 200 800 200

200

2,75

020

01,

050

200

9003,80012,300

4,40

01,

000

1,400

290±0,000 FFL+9,400 AHD

011.03

021.03

031.03

041.03

LINE OF ROOF OVER

WATER FILLING STATION

ALUMINIUM BENCH SEATING

CAR PARKING4 x 5400x2700 SPACES

LINE OF CONCRETE SLAB

40x30 FUTUREWOOD ENVIROSLATRECYCLED TIMBER BATTENS IN BLACK,50mm SPACING OVER BLOCKWORK

40x30 FUTUREWOOD ENVIROSLAT RECYCLED TIMBERBATTENS IN BLACK, 50mm SPACING

40x30 FUTUREWOOD ENVIROSLATRECYCLED TIMBER BATTENS IN BLACK,50mm SPACING OVER BLOCKWORK


ACCESSIBLE CAR SPACE7800x3200 ALL ON GRADEPARTLY ON SLAB, PARTLYSEALED BITUMEN

SIGNAGE MOUNTED TOCOLUMN INDICATED

ACCESSABLE PARKING

DOOR CIRCULATIONTO AS1428.1, 13.3

LIGHTING MOUNTED TO ROOF

SIGNAGE TO WALL READING'SOUTH ARM PUBLIC TOILETS',REFER ELEVATION 01

FLOOR WASTE

LINE OF LASERLITE ROOF SHEETINGOVER, INCLUDE SECURITY MESH

3 41 2

LIGHTING MOUNTED TO CEILING

LIGHTING MOUNTED TO CEILING

LIGHTING MOUNTED TO ROOF ABOVE SINK(DOUBLES AS SECURITY LIGHTING)

1400mm CLEAR SPACE INFRONT OF PAN

LINE OF LASERLITE ROOF SHEETINGOVER, INCLUDE SECURITY MESH

TOILET ROLL HOLDER TOAS1428.1 15.2.6

SHARED AREACONCRETE TEXTURED FINISH

A: 54.11m²

SERVICECORE

A: 3.19m²

UNISEX WCA: 2.40m²

UNISEX DDAA: 6.71m²

ACCESSIBLECAR SPACE

-GROUND FLOOR

1:50

Received 05.08.2019



Drawing number

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Status

ARCHITECTURALELEVATIONS




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HOBART


MELBOURNE

±0,000 FFL+9,400 AHD

+4,265 RL+13,665 AHD

4,26

5

2,13

0

CORRUGATED ROOF SHEETINGIN 'NIGHT SKY' COLOUR

ALUMINIUM BENCH SEATING

40x30 FUTUREWOOD ENVIROSLATRECYCLED TIMBER BATTENS IN BLACK,

50mm SPACING



CONCRETE SLAB ON GROUND

SIGNAGE TO WALL READING 'SOUTH ARMPUBLIC TOILETS', CUT BATTENS AROUND

SIGNAGE, OFFSET BATTENS BY 30mm,SIGN APPROX. SIZE 2700mm x 175mm

ELEVATED ACCESSABLEPARKING SIGN

NGL


50mm SPACING OVER BLOCKWORK

±0,000 FFL+9,400 AHD

+4,265 RL+13,665 AHD

CORRUGATED ROOF SHEETING IN'NIGHT SKY' COLOUR

40x30 FUTUREWOOD ENVIROSLATRECYCLED TIMBER BATTENS INBLACK, 50mm SPACING OVERBLOCKWORK


LASERLITE ROOF SHEETING OVER,INCLUDE SECURITY MESH

NGL

1,060 ABO

VE N

GL

±0,000 FFL+9,400 AHD

+4,265 RL+13,665 AHD

3,68

0 ABO

VE

NG

L

2,13

0


INDICITAVE LINE OFBATTERED EARTH

NGL


50mm SPACING

3,68

0 ABO

VE

NG

L


CONCRETE SLAB ON GROUND

INDICITAVE LINE OFBATTERED EARTH

40x30 FUTUREWOODENVIROSLAT RECYCLED TIMBERBATTENS IN BLACK, 50mmSPACING


FILL TO MATCH LEVEL OF SLAB NGL

UNISEXSTANDARDACCESS TOILET

UNISEX DDAUNIVERSALACCESS TOILET

±0,000 FFL+9,400 AHD

+4,265 RL+13,665 AHD

01-

NORTH ELEVATION1:100

02-

EAST ELEVATION1:100

03-

SOUTH ELEVATION1:100

04-

WEST ELEVATION1:100

Received 05.08.2019

Director of Building Control – Date Approved 1 July 2017 Building Act 2016 - Approved Form No. 55

CERTIFICATE OF QUALIFIED PERSON – ASSESSABLE ITEM

Section 321

To: Owner /Agent

Address

Suburb/postcode

Qualified person details:

Qualified person: LEIGH SALTMARSH

Address: 10 RYDE STREET Phone No:

NORTH HOBART 7000 Fax No:

Licence No: CC2663J Email address: [email protected]

Qualifications and Insurance details:

CIVIL BROOKLYN UNDERWRITING

Speciality area of expertise:

STRUCTURAL / CIVIL ENGINEER

Details of work:

Address: 3 JETTY ROAD Lot No:

SOUTH ARM Certificate of title No:

The assessable item related to this certificate:

1000 litre wastewater pump pit capacity.

Certificate details:

Certificate type: PLUMBING WORK

This certificate is in relation to the above assessable item, at any stage, as part of - (tick one)

building work, plumbing work or plumbing installation or demolition work: X

or

a building, temporary structure or plumbing installation:

In issuing this certificate the following matters are relevant –

Documents: Design drawings & report by GES Geo-Environmental Solutions dated June 2019.

Relevant calculations:

Form 55

Received 05.08.2019

Director of Building Control – Date Approved 1 July 2017 Building Act 2016 - Approved Form No. 55

References: AS 1547-2012 On-site wastewater management. AS3500 (Parts 0-5)-2015 Plumbing & Drainage set.

Substance of Certificate: (what it is that is being certified)

Hydraulic design of 1000 litre capacity pump pit & 32mm discharge line to meet the sites irrigation requirements.

Scope and/or Limitations The hydraulic design of the above elements is based on Site Assessment report provided by GES. Structural design and certification of pump pit by others. The proposed pump pit is to have a single phase submersible wastewater pump with enough head capacity to suit site levels. S&E recommends that inspections are carried out by the local authority to ensure installation has been carried out in accordance with GES report and pump pit supplier. We must be advised of any proposed alterations to the certified drawings or design discrepancies due to variations of levels or site conditions to those contained in the referenced documents. We have not been engaged to undertake inspections during construction.

I certify the matters described in this certificate.

Qualified person:

Certificate No: 19213-55

Date: 23/06/2019

Received 05.08.2019

Geo-Environmental Solutions P/L 29 Kirksway Place Battery Point 7004. Ph 6223 1839

GEO-ENVIRONMENTAL ASSESSMENT

South Arm Public Toilets

Jetty Rd South Arm

June 2019

Disclaimer: The author does not warrant the information contained in this document is free from errors or

omissions. The author shall not in any way be liable for any loss, damage or injury suffered by the User

consequent upon, or incidental to, the existence of errors in the information.

Received 05.08.2019

Geo-Environmental Solutions– Site Assessment South Arm Public Toilets

2

Introduction

Client: Dock4 Architects

Date of inspection: 16/5/2019

Location: Jetty Rd, South Arm

Land description: Approx. 1060m2

Building type: Existing dwelling amenities building – to be demolished and replaced

Investigation: AMS PowerProbe

Inspected by: A. Plummer

Background information

Map: Mineral Resources Tasmania – Blackmans Bay Sheet 1:25 000

Rock type: Quaternary sediments

Soil depth: Approx. 1.5 – 2.0m +

Planning overlays: None identified

Local meteorology: Annual rainfall approx 550 mm

Local services: Tank with on-site waste water disposal

Site conditions

Slope and aspect: Approx 5 – 10% fall to the Norht

Site drainage: Well drained

Vegetation: Mixed grass and native species

Weather conditions: Fine, approx. <2mm rainfall received in preceding 7 days.

Ground surface: Dry sandy surface

Investigation

A number of auger holes were completed to identify the distribution of, and variation in soil

materials on the site. Representative excavations at the approximate locations indicated on

the site plan were chosen for testing and classification according to AS2870-2011 and

AS1547-2012 (see profile summaries).

Received 05.08.2019


3

Profile summaries

Depth (m) Depth (m) Horizon Description

0 – 0.30 0 – 0.20 A1 Grey SAND (SP), single grain, dry loose

consistency, clear boundary to

0.30 – 0.80 0.20 – 0.70 A2 Light Grey SAND (SP), single grain, dry medium

dense consistency, clear boundary to

0.70 – 2.0+ A3 Pale Brown SAND (SW), single grain, dry medium

dense consistency, TH2 lower boundary undefined

0.80 – 1.50 BC Brownish Yellow CLAYEY SAND (SC), single

grain, slightly moist dense consistency, refusal TH1

on assumed bedrock

Wastewater Classification & Recommendations

According to AS1547-2012 (on-site waste-water management) the natural soil is classified

as SAND (category 1).

The proposed development includes removal of the existing amenities building and

subsequent replacement with a new building. As such, a new onsite wastewater system will

also be required. Exact usage figures of the proposed facility are uncertain, however a usage

of 100 people per day has been advised by the Clarence City Council.

Using a design hydraulic loading of 6L/person/day for public toilets (Table 4 of the

Director’s Guidelines for On-Site Wastewater Management Systems) the total daily load of

the proposed amenities building has been calculated at 600L/day.

Due to the uncertain usage, a conservative Design Loading Rate (DLR) of 20L/m2/day has

been assigned. Therefore, an absorption area of at least 30m2 will be required to

accommodate the expected wastewater load. This can be installed as one 15m x 2m x 0.6m

absorption trench. It is recommended that the absorption trench be located close to the rear

boundary to avoid any potential issues from the existing toilet block location. It is

recommended that specific design to account for this if the assigned reserve area is required.

A submersible pump (min 9m head) and pumpwell (min 1000L) will be required to transfer

effluent from the septic tank (min 3000L dual-purpose with outlet filter) to the absorption

area.

Received 05.08.2019


4

A cut-off drain will not be required due to highly permeable sandy, however any stormwater

overflow will need to be diverted away from the application area if required.

The following setback distances are required to comply with both E23 of the Clarence

Interim Planning Scheme 2015 and Building Act 2016.

Upslope or level buildings: 2m

Downslope buildings: 9m

Upslope or level boundaries: 1.5m

Downslope boundaries: 10m

Downslope surface water: 100m

Compliance with Building Act 2016 is outlined in the attached table. Compliance with E23

of the Clarence Interim Planning Scheme 2015 is outlined below:

Received 05.08.2019


5

To comply with E23 of the Interim Planning Scheme 2015:

A1 Horizontal separation distance from a building to a land application area must comply

with one of the following:

(a) be no less than 6m; Complies

(b) be no less than;

(i) 2m from an upslope or level building;

(ii) if primary treated effluent be no less than 4m plus 1m for

every degree of average gradient from a downslope building;

(iii) if secondary treated effluent and subsurface application, no

less than 2m plus 0.25m for every degree of average gradient

from a down slope building.

Complies

Complies

(9m required)

A2 Horizontal separation distance from downslope surface water to a land application

area must comply with any of the following:

(a) be no less than 100m;

Complies

(approx. 110m)

(b) if the site is within a high rainfall area or the site soil category is

4, 5 or 6, be no less than the following;

(i) if primary treated effluent standard or surface application,

50m plus 7m for every degree of average gradient from

downslope surface water;

(ii) if secondary treated effluent standard and subsurface

application, 50m plus 2m for every degree of average

gradient from down slope surface water.

(c) if the site is not within a high rainfall area or the site soil

category is not 4, 5 or 6, be no less than the following;

(i) if primary treated effluent 15m plus 7m for every degree of

average gradient from downslope surface water;

(ii) if secondary treated effluent and subsurface application,

15m plus 2m for every degree of average gradient from

down slope surface water.

Received 05.08.2019


6

A3 Horizontal separation distance from a property boundary to a land application area

must comply with either of the following:

(a) be no less than 40m from a property boundary;

Non-compliance

(b) be no less than:

(i) 1.5m from an upslope or level property boundary; and

(ii) if primary treated effluent 2m for every degree of average

gradient from a downslope property boundary; or

(iii) if secondary treated effluent and subsurface application,

1.5m plus 1m for every degree of average gradient from a

downslope property boundary.

Complies

Complies

(10m required)

A4

Horizontal separation distance from a downslope bore, well or

similar water supply to a land application area must be no less than

50m.

Complies

A5

Vertical separation distance between groundwater and a land

application area must be no less than 1.5m.

Complies

A6

Vertical separation distance between a limiting layer and a land

application area must be no less than 1.5m.

Complies

A7 The arrangement of a land application area must comply with both of the following:

(a) not include areas beneath buildings, driveways or other hard

stand areas;

Complies

(b) have a minimum horizontal dimension of 3m. Complies

It is recommended that during construction that GES be notified of any major variation to

the soil conditions or wastewater loading as outlined in this report.

Dr John Paul Cumming B.Agr.Sc (hons) PhD CPSS GAICD

Environmental and Engineering Soil Scientist

Received 05.08.2019


7

Geo-Environmental Solutions

Land suitability and system sizing for on-site wastewater management

Assessment ReportSite assessment for on-site waste water disposal

Assessment for Dock4 Architects Assess. Date

Ref. No.

Assessed site(s) South Arm Public Toilets Site(s) inspected

Local authority Clarence City Council Assessed by

B.Agr.Sc(hons) PhD

Wastewater CharacteristicsWastewater volume (L/day) used for this assessment = (using a method independent of the no. of bedrooms)

Septic tank wastewater volume (L/day) = Sullage volume (L/day) =

Total nitrogen (kg/year) generated by wastewater = Total phosphorus (kg/year) generated by wastewater =

Climatic assumptions for site (Evapotranspiration calculated using the crop factor method)

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Mean rainfall (mm) 41 36 36 45 36 29 46 47 40 48 44 56Adopted rainfall (R, mm) 41 36 36 45 36 29 46 47 40 48 44 56

Retained rain (Rr, mm) 37 32 32 41 32 26 41 42 36 43 40 50Max. daily temp. (deg. C)

Evapotrans (ET, mm) 130 110 91 63 42 29 32 42 63 84 105 126Evapotr. less rain (mm) 93 78 59 23 10 3 -10 0 27 41 65 76

Annual evapotranspiration less retained rain (mm) = 463

Soil characterisitics

Texture = Category = 1 Thick. (m) = 2.5

Adopted permeability (m/day) = Adopted LTAR (L/sq m/day) = 20 Min depth (m) to water = 5

Proposed disposal and treatment methods

Proportion of wastewater to be retained on site: All wastewater will be disposed of on the siteThe preferred method of on-site primary treatment: In dual purpose septic tank(s)

The preferred method of on-site secondary treatment: In-groundThe preferred type of in-ground secondary treatment: Trench(es)

The preferred type of above-ground secondary treatment: NoneSite modifications or specific designs: Not needed

Suggested dimensions for on-site secondary treatment system

Total length (m) = Width (m) = 2Depth (m) = 0.6

Total disposal area (sq m) required = comprising a Primary Area (sq m) of:

and a Secondary (backup) Area (sq m) of: Sufficient area is available on site

15

60

600

3030

3.3

3

SAND

6000

1.5

16-May-19

John Paul Cumming

17-Jun-19

This report summarises wastewater volumes, climatic inputs for the site, soil characteristics and sustem sizing and design issues. SiteCapability and Environmental sensitivity issues are reported separately, where 'Alert' columns flag factors w ith high (A) or very high (AA)

limitations w hich probably require special consideration for system design(s). Blank spaces on this page indicate data have not been enteredinto TRENCH.

To enter comments, click on the line below 'Comments'. (This yellow-shaded box and the buttons on this page will not be printed.)

CommentsUsing a conservative DLR of 20L/sq m/day, the expected wastewater output of 600L/day will require an absorption area of 30sq m. Therefore the system should have the capacity to cope with predicted climatic and loading events.

Received 05.08.2019


8



Site Capability ReportSite assessment for on-site waste water disposal


Ref. No.



B.Agr.Sc(hons) PhD

Expected design area sq m V. high Very high Moderate

A Density of disposal systems /sq km Mod. High

Slope angle degrees High Very low

Slope form Straight simple High Low

Surface drainage Good High Very low

Flood potential Site floods <1:100 yrs High Very low

Heavy rain events Infrequent High Moderate

Aspect (Southern hemi.) Faces N V. high Very low

Frequency of strong winds Common High Low

Wastewater volume L/day High Moderate No change

SAR of septic tank effluent High Low

SAR of sullage High Moderate

Soil thickness m V. high Very low

Depth to bedrock m V. high Very low

Surface rock outcrop % V. high Very low

Cobbles in soil % V. high Very low

Soil pH High Low

Soil bulk density gm/cub. cm High Very low

Soil dispersion Emerson No. V. high Very low

Adopted permeability m/day Mod. Very high Moderate

Long Term Accept. Rate L/day/sq m High Low Moderate

Other factors lessen impact

Limitation

John Paul Cumming

200

40

5

5.5

2.5

20

3 Other factors lessen impact

600

0

0

1.4

1.7

2.5

8

2.6

17-Jun-19

16-May-19

To enter comments, click on the line below 'Comments' . (This yellow-shaded box and the buttons on this page will not be printed.)

This report summarises data relating to the physical capability of the assessed site(s) to accept wastewater. Environmental sensitivity andsystem design issues are reported separately. The 'Alert' column flags factors w ith high (A) or very high (AA) site limitations w hich probably

require special consideration in site acceptability or for systemdesign(s). Blankspaces indicate data have not been entered into TRENCH.

CommentsThe site has the capabilityto accept onsite wastewater

Received 05.08.2019


9



Environmental Sensitivity ReportSite assessment for on-site waste water disposal


Ref. No.



B.Agr.Sc(hons) PhD

AA Cation exchange capacity mmol/100g High Very high

A Phos. adsorp. capacity kg/cub m High High

Annual rainfall excess mm High Very low

Min. depth to water table m High Very low

Annual nutrient load kg High Very low

G'water environ. value Agric non-sensit V. high Low

Min. separation dist. required m High Very low

Risk to adjacent bores Very low V. high Very low

A Surf. water env. value Recreational V. high High

A Dist. to nearest surface water m V. high High

Dist. to nearest other feature m V. high Moderate No change

Risk of slope instability Very low V. high Very low

Distance to landslip m V. high Very low

17-Jun-19

16-May-19

0.2

-463

500

Limitation

110

50

4.8

5

15

5

John Paul Cumming

To enter comments, click on the line below 'Comments'. (This yellow-shaded box and the buttons on this page will not be printed.)

This report summarises data relating to the environmental sensitivity of the assessed site(s) in relation to applied w astewater. Physicalcapability and system design issues are reported separately. The 'Alert' column flags factors with high (A) or very high (AA) limitations w hich

probably require special consideration in site acceptability or for system design(s). Blank spaces indicate data have not been entered intoTRENCH.

CommentsDistance to surface water (110m) complies with the minimum setback distance required under Clarence Interim PlanningScheme 2015 (100m). A conservative DLR has been utilised to minimise risk associated with the low CEC and phosphorusadsorption capacity.

Received 05.08.2019

Demonstration of wastewater system compliance to Building Act 2016 Guidelines for On-site Wastewater Disposal

Acceptable Solutions Performance Criteria Compliance

A1

Horizontal separation distance from a building to a

land application area must comply with one of the

following:

a) be no less than 6m; or

b) be no less than:

(i) 3m from an upslope building or level

building;

(ii) If primary treated effluent to be no less than 4m plus 1m for every degree of average

gradient from a downslope building;

(iii) If secondary treated effluent and subsurface application, no less than 2m plus 0.25m for every degree of average gradient from a

downslope building.

P1

a) The land application area is located so that

(i) the risk of wastewater reducing the

bearing capacity of a building’s

foundations is acceptably low.; and

(ii) is setback a sufficient distance from a

downslope excavation around or

under a building to prevent

inadequately treated wastewater

seeping out of that excavation

Complies with A1 (a) Land application area will be located with minimum separation distance to proposed building of 6m.

A2 P2 Complies with A2 (a) Land application area located > 100m from downslope surface water

Horizontal separation distance from downslope Horizontal separation distance from downslope surface water to a land application area must comply surface water to a land application area must with (a) or (b) comply with all of the following:

(a) be no less than 100m; or a) Setbacks must be consistent with AS/NZS

(b) be no less than the following: 1547 Appendix R;

(i) if primary treated effluent 15m plus 7m for

every degree of average gradient to

downslope surface water; or

b) A risk assessment in accordance with Appendix A of AS/NZS 1547 has been

completed that demonstrates that the risk is

acceptable. (ii) if secondary treated effluent and subsurface

application, 15m plus 2m for every degree of average gradient to down slope surface water.

Received 05.08.2019

A3 P3

Complies with A3 (b) (i) Land application area will be located with a minimum separation distance of 1.5m from an upslope or level property boundary

Complies with A3 (b) (ii) Land application area will be located with a minimum separation distance of 20m of downslope property boundary (10m required)

Horizontal separation distance from a property Horizontal separation distance from a property boundary to a land application area must comply with boundary to a land application area must comply either of the following: with all of the following:

(a) be no less than 40m from a property boundary; (a) Setback must be consistent with AS/NZS or 1547 Appendix R; and

(b) be no less than: (b) A risk assessment in accordance with

(i) 1 .5m from an upslope or level property

boundary; and

(ii) If primary treated effluent 2m for every

degree of average gradient from a

downslope property boundary; or

(iii) If secondary treated effluent and subsurface application, 1.5m plus 1m for every degree of average gradient from a downslope property boundary.

Appendix A of AS/NZS 1547 has been

completed that demonstrates that the risk is

acceptable.

A4

Horizontal separation distance from a downslope

bore, well or similar water supply to a land

application area must be no less than 50m and not be

within the zone of influence of the bore whether up or

down gradient.

P4

Horizontal separation distance from a downslope

bore, well or similar water supply to a land

application area must comply with all of the

following:

(a) Setback must be consistent with AS/NZS

1547 Appendix R; and

(b) A risk assessment completed in accordance

with Appendix A of AS/NZS 1547

demonstrates that the risk is acceptable

Complies with A4 No bore or well identified within 50m

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A5

Vertical separation distance between groundwater

and a land application area must be no less than:

(a) 1.5m if primary treated effluent; or

(b) 0.6m if secondary treated effluent

P5

Vertical separation distance between

groundwater and a land application area must

comply with the following:

(a) Setback must be consistent with AS/NZS

1547 Appendix R; and

(b) A risk assessment completed in accordance

with Appendix A of AS/NZS 1547 that

demonstrates that the risk is acceptable

Complies with A5 (a) No groundwater encountered

A6

Vertical separation distance between a limiting layer

and a land application area must be no less than:

(a) 1.5m if primary treated effluent; or

(b) 0.5m if secondary treated effluent

P6

Vertical setback must be consistent with

AS/NZS1547 Appendix R.

Complies with A6 (a)

A7 P7

nil A wastewater treatment unit must be located a

sufficient distance from buildings or neighbouring

properties so that emissions (odour, noise or

aerosols) from the unit do not create an

environmental nuisance to the residents of those

properties

Complies

Received 05.08.2019

AS1547:2012 – Loading Certificate – Septic System Design

This loading certificate sets out the design criteria and the limitations associated with use of the

system.

Site Address: South Arm Public Toilets, Jetty Rd South Arm

System Capacity: 100 people @ 6L/person/day

Summary of Design Criteria

DLR: 20L/m2/day.

Absorption area: 30m2

Reserve area location /use: Assigned – more than 100% available

Water saving features fitted: Standard fixtures

Allowable variation from design flows: 1 event @ 200% daily loading per quarter

Typical loading change consequences: Expected to be minimal due to capacity of system and site

area (provided loading changes within 25% of design)

Overloading consequences: Continued overloading may cause hydraulic failure of the absorption

area and require upgrading/extension of the area. Risk considered acceptable due to visible signs of

overloading and owner monitoring.

Underloading consequences: Lower than expected flows will have minimal consequences on

system operation unless the house has long periods of non occupation. Under such circumstances

additional maintenance of the system may be required. Risk considered acceptable.

Lack of maintenance / monitoring consequences: Issues of underloading/overloading and

condition of the absorption area require monitoring and maintenance, if not completed system failure

may result in unacceptable health and environmental risks. Septic tank de-sludging must also be

monitored to prevent excessive sludge and scum accumulation. Monitoring and regulation by the

property owner required to ensure compliance.

Other operational considerations: Owners/occupiers must be aware of the operational

requirements and limitations of the system, including the following; the absorption area must not be

subject to traffic by vehicles or heavy stock and should be fenced if required. The absorption area

must be kept with adequate grass cover to assist in evapotranspiration of treated effluent in the

absorption trenches. The septic tank must be desludged at least every 3 years, and any other

infrastructure such as septic tank outlet filters must also be cleaned regularly (approx. every 6

months depending upon usage). Foreign materials such as rubbish and solid waste must be kept out

of the system.

Received 05.08.2019

Director of Building Control - date approved: 2 August 2017 Building Act 2016 - Approved Form No 35

CERTIFICATE OF THE RESPONSIBLE DESIGNER

Section 94 Section 106 Section 129 Section 155

To: Dock 4 Architects Owner name

GPO Box 338 Address

Hobart 7001 Suburb/postcode

Designer details:

Name: John-Paul Cumming

Category: Bld. Srvcs. Dsgnr. - Hydraulic

Business name: Geo-Environmental Solutions Phone No: 03 6223 1839

Business address:

29 Kirksway Place

Battery Point 7004 Fax No: N/A

Licence No: CC774A Email address: [email protected]

Details of the proposed work:

Owner/Applicant Dock 4 Architects Designer’s project reference No.

04554

Address: South Arm Public Toilets Lot No: 77328/3

South Arm 7022

(X all applicable)

Description of work:

Type of work: Building work Plumbing work X

On-site wastewater management system - design

(new building / alteration / addition / repair / removal / re-erection water / sewerage / stormwater / on-site wastewater management system / backflow prevention / other)

Description of the Design Work (Scope, limitations or exclusions): (X all applicable certificates)

Certificate Type: Certificate Responsible Practitioner

Building design Architect or Building Designer

Structural design Engineer or Civil Designer

Fire Safety design Fire Engineer

Civil design Civil Engineer or Civil Designer

Hydraulic design Building Services Designer

Fire service design Building Services Designer

Electrical design Building Services Designer

Mechanical design Building Service Designer

Plumbing design Plumber-Certifier; Architect, Building Designer or Engineer

Other (specify)

Deemed-to-Satisfy: Performance Solution: (X the appropriate box)

Other details: Dual-purpose septic tank with pumpwell

Design documents provided:

Form 35

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The following documents are provided with this Certificate – Document description:

Drawing numbers: Prepared by: Geo-Environmental Solutions Date: Jun-19

Schedules: Prepared by: Date:

Specifications: Prepared by: Geo-Environmental Solutions Date: Jun-19

Computations: Prepared by: Date:

Performance solution proposals: Prepared by: Geo-Environmental Solutions Date: Jun-19

Test reports: Prepared by: Geo-Environmental Solutions Date: Jun-19

Standards, codes or guidelines relied on in design process:

AS1547-2012 On-site domestic wastewater management.

AS3500 (Parts 0-5)-2013 Plumbing and drainage set.

Any other relevant documentation:

Onsite Wastewater Assessment – South Arm Public Toilets – June 2019 – GES

Form 55 for performance solution (pumpwell)

Attribution as designer:

I John-Paul Cumming, am responsible for the design of that part of the work as described in this certificate;

The documentation relating to the design includes sufficient information for the assessment of the work in accordance with the Building Act 2016 and sufficient detail for the builder or plumber to carry out the work in accordance with the documents and the Act;

This certificate confirms compliance and is evidence of suitability of this design with the requirements of the National Construction Code.

Name: (print) Signed Date

Designer: John-Paul Cumming

17/06/2019

Licence No: CC774A

Received 05.08.2019


Assessment of Certifiable Works: (TasWater)

Note: single residential dwellings and outbuildings on a lot with an existing sewer connection are not considered to increase demand and are not certifiable.

If you cannot check ALL of these boxes, LEAVE THIS SECTION BLANK.

TasWater must then be contacted to determine if the proposed works are Certifiable Works.

I confirm that the proposed works are not Certifiable Works, in accordance with the Guidelines for TasWater CCW Assessments, by virtue that all of the following are satisfied:

x The works will not increase the demand for water supplied by TasWater

x The works will not increase or decrease the amount of sewage or toxins that is to be removed by,

or discharged into, TasWater’s sewerage infrastructure

x The works will not require a new connection, or a modification to an existing connection, to be

made to TasWater’s infrastructure

x The works will not damage or interfere with TasWater’s works

x The works will not adversely affect TasWater’s operations

x The work are not within 2m of TasWater’s infrastructure and are outside any TasWater easement

x I have checked the LISTMap to confirm the location of TasWater infrastructure

x If the property is connected to TasWater’s water system, a water meter is in place, or has been applied for to TasWater.

Certification:

I ................ John-Paul Cumming...................... being responsible for the proposed work, am satisfied

that the works described above are not Certifiable Works, as defined within the Water and Sewerage

Industry Act 2008, that I have answered the above questions with all due diligence and have read and

understood the Guidelines for TasWater CCW Assessments.

Note: the Guidelines for TasWater Certification of Certifiable Works Assessments are available at: www.taswater.com.au

Name: (print) Signed Date

Designer: John-Paul Cumming

17/06/2019

Received 05.08.2019

http://www.taswater.com.au/

Figure 1 – absorption trench

Design notes:

1. Absorption trench dimensions of up to 20m long by 0.55m deep by 2.0m wide.

2. Base of trenches to be excavated level and smearing and compaction avoided.

3. Lower 350mm of bed to be filled with 20-40mm drainage aggregate and

slotted 90-100mm distribution pipes packed into upper 100mm of aggregate.

4. Geotextile or filter cloth to be placed over the distribution pipes to prevent

clogging of the pipes and aggregate –category 1 – SAND the sides should also

be lined.

5. Final finished surface with sandy loam from on site to be 75 mm above natural

surface to allow for settlement.

6. Construction on slopes up to 15% to allow trench depth range 600mm upslope

edge to 400mm on down slope edge.

7. On slopes over 10% the sandy loam cover should be 75-100mm above natural

with a downslope batter no less than 500mm in length to avoid surface water

accumulation (up slope ag drain also recommended to divert surface water

flows).

8. All works on site to comply with AS3500 and Tasmanian Plumbing code.

Trench width 2000mm

Nominal trench

depth 550mm

Geotextile or filter cloth

Inspection opening

20-40 mm aggregate

(approx 400 mm deep)

Ground surface

Slotted 90-100 mm distribution

pipes - Spacing @ 700mm centres

Finished surface 100 mm above natural

Topsoil (min depth 150mm)

600mm

0.60m

Received 05.08.2019

Received 05.08.2019