SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL - NSW ...
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REF: 3750WW
VERSION [1.0]
MAY 7, 2020
SOIL & SITE ASSESSMENT FOR ONSITE
WASTEWATER DISPOSAL
1840 SILVERDALE ROAD, SILVERDALE, NSW
LGA: Wollondilly
Lot 2 DP 549274
CLIENT: Lisa Osborn
HARRIS ENVIRONMENTAL CONSULTING
PO BOX 70, JAMBEROO, 2533, NSW
TEL: (02) 4236 0954
Info@harrisenvironmental.com.au
SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL ON 1840 SILVERDALE ROAD, SILVERDALE, NSW
VERSION CONTROL
Title Soil & Site Assessment for Onsite Wastewater Disposal
Site address 1840 Silverdale Road, Silverdale, NSW
Description Proposed dwellings
Created By Pichamon Sarakan B.Env Engineering (UOW)
Approved by: Sean Harris Msc Env Science (UOW), Grad dip Nat Res (UNE), BscAppSc,
Agriculture (HAC)
Date Created 7/05/2020
Version Modified Modifications Made Date Status
Number By Modified
[1.0] P.S. Issue for client review 7/05/2020 Complete
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SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL ON 1840 SILVERDALE ROAD, SILVERDALE, NSW
TABLE OF CONTENTS
1. INTRODUCTION ............................................................................................................. 4
2. SITE INFORMATION ....................................................................................................... 5
3. SITE ASSESSMENT ....................................................................................................... 5
4. SOIL ASSESSMENT ....................................................................................................... 6
5. SUMMARY OF SOIL AND SITE CONSTRAINTS ........................................................... 7
6. SYSTEM DESIGN ........................................................................................................... 9
6.1 Wastewater Treatment System................................................................................. 9
6.2 Pipes......................................................................................................................... 9
7. REQUIRED IRRIGATION AREA..................................................................................... 11
8. LOCATION AND METHOD OF IRRIGATION ............................................................... 12
10. SUMMARY ................................................................................................................. 12
11. REFERENCES ........................................................................................................... 13
FIGURES
Figure 1 Location ......................................................................................................... 4
TABLES
Table 1 Minimum pipe diameter and grade calculations ......................................... 10
Table 2 Minimum pipe depth for trafficable areas .................................................... 10
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SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL ON 1840 SILVERDALE ROAD, SILVERDALE, NSW
APPENDICES
Appendix i Semi Fixed Spray Irrigation ......................................................................... 14
Appendix ii General recommendations to manage water quality and quantity............... 16
Appendix iii Required buffers .......................................................................................... 17
Appendix iv Standard Drawing 9A - Upslope Diversion Drain......................................... 18
Appendix v Water Balance ............................................................................................. 19
Appendix vi Nitrogen Balance ......................................................................................... 20
Appendix vii Phosphorus Balance.................................................................................... 21
Appendix viii Site Plan- Sheet 1 ........................................................................................ 22
Appendix ix Site Plan- Sheet 2 ........................................................................................ 23
Appendix x Surface Irrigation Standard Drawing............................................................ 24
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SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL ON 1840 SILVERDALE ROAD, SILVERDALE, NSW
1. INTRODUCTION
This Site and Soil Assessment for On-site Wastewater was prepared by Harris Environmental
Consulting at the request of Lisa Osborn. It relates to the construction of a residential dwelling
at 1840 Silverdale Road, Silverdale, NSW.
Fieldwork was undertaken by a representative of Harris Environmental Consulting (HEC) on
1st May 2020. This plan is based on the primary investigation of the soils, topography and
hydrology of the site observed on the day of inspection. Soil samples and photos of the site
were taken for further analysis. This assessment was undertaken for a proposal to install an
Aerated Wastewater Treatment System (AWTS) for wastewater treatment and spray irrigation
for treated wastewater disposal for the proposed dwelling.
Harris Environmental Consulting was commissioned to undertake this Soil and Site
Assessment for On-Site Wastewater Management in accordance with:
Wollondilly Shire Council’s DCP for On-Site Sewage Management and Greywater
Re-Use, (May 2011). Compliant with Category 1 as more than 1500m2 is available
for effluent disposal
Local Government Act 1993;
Australian Standard AS/NZS 3500 Plumbing and Drainage 2018;
Environment and Health Protection Guidelines (1998) On-site Sewage Management;
for Single Households (Department of Local Government);
AS/NZ 1547:2012 On-site wastewater management (Standards Australia, 2012).
FIGURE 1 LOCATION
Source: Nearmap
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SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL ON 1840 SILVERDALE ROAD, SILVERDALE, NSW
2. SITE INFORMATION
Owner: Lisa Osborn
Site address: 1840 Silverdale Road, Silverdale, NSW
Legal title: Lot 2 DP 549274
Local Government: Wollondilly Council
Size of property: 28 acres
Water supply: Tank
Wastewater design load and No. of bedrooms in the 3 bedrooms + 1
daily wastewater (L/day): proposed dwelling potential bedroom
Total wastewater load 800L/day
Proposed wastewater treatment: AWTS
Proposed wastewater disposal: Spray irrigation
Date site assessed: May 1, 2020
Date report prepared: May 7, 2020
Report prepared by Pichamon Sarakan
Site assessor:
Msc Env Science (UOW), Grad dip Nat Res (UNE),
BscAppSc, Agriculture (HAC)
Sean Harris
3. SITE ASSESSMENT
Climate - rainfall Warragamba Rainfall Station (median annual 529.6
mm)
Climate - evaporation Badgerys Creek (median 1557mm)
Flood potential Proposed wastewater treatment system is above 1 in
100-year flood level; minor limitation. Proposed
wastewater disposal area above 1 in 20-year flood
level; minor limitation.
Frost potential The site is not known to be subject to severe frosts,
minor limitation
Exposure Northern aspect; minor limitation
Slope 2-3%, minor limitation for spray irrigation
Landform Uniform slope, minor limitation
Run-on and seepage Minor upslope stormwater run on; minor limitation
Erosion potential Minor erosion potential
Site drainage Moderate to well drained soil profile; minor limitation
Evidence of fill No evidence of fill; minor limitation
Domestic groundwater use No groundwater bores within 100m
Surface rock No surface rock; minor limitation
Area available for effluent Area available for effluent disposal within designated
disposal Effluent Management Area (EMA), minor limitation
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SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL ON 1840 SILVERDALE ROAD, SILVERDALE, NSW 4. SOIL ASSESSMENT Method: Hand augur/crowbar/shovel Depth to bedrock (m): 1000mm to restrictive layer; minor limitation Depth to high soil No groundwater or subsoil mottling encountered at a depth of watertable: 1000mm; minor limitation Coarse (%): 0-5% coarse fragments in subsoil, minor limitation pH (soil/water): pH 5.5-6; minor limitation Electrical conductivity:
SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL ON 1840 SILVERDALE ROAD, SILVERDALE, NSW 5. SUMMARY OF SOIL AND SITE CONSTRAINTS There are no significant soil or site constraints that would prevent the installation of an Aerated Wastewater Treatment System (AWTS) for wastewater treatment and spray irrigation for treated wastewater disposal for the proposed dwelling. The location of the proposed spray irrigation is to the west of the proposed dwelling. It is in the location that is compliant with the buffers and setback distances required by Wollondilly Council. This includes being more than 15m from dwellings, 40m from drainage depressions, 100m from permanent watercourses, 3m if the area is down-gradient from property boundaries/driveways and 6m if the area is upgradient from property boundaries and driveways. In accordance with the Wollondilly Shire Council, 1500m2 of land suitable for spray irrigation has been identified. The proposed irrigation is 365m2 which leaves the remaining 1135m2 as a reserve area. The loam to clay loam soil profile has ideal permeability and nutrient absorption properties for this method of treatment and disposal. It is expected the proposed effluent management area will be fully grassed following the completion of the proposed development. Photo 1 On-site soil assessment profile Harrisenvironmental.com.au MAY 7, 2020 Tel: (02) 4236 0954 ref 3750WW E: Info@harrisenvironmental.com.au page | 7
SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL ON 1840 SILVERDALE ROAD, SILVERDALE, NSW Photo 2 Looking downslope over proposed irrigation area Harrisenvironmental.com.au MAY 7, 2020 Tel: (02) 4236 0954 ref 3750WW E: Info@harrisenvironmental.com.au page | 8
SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL ON 1840 SILVERDALE ROAD, SILVERDALE, NSW
6. SYSTEM DESIGN
6.1 WASTEWATER TREATMENT SYSTEM
An Aerated Wastewater Treatment System is proposed for wastewater treatment. The
design wastewater load is 800L/day. The owner is required to provide the Council with
the AWTS manufacturer’s specifications of the proposed treatment system.
(Information on proposed AWTS can be obtained from the manufacturer or NSW Heath
Register of Accredited Sewage Management Systems at
http://www.health.nsw.gov.au/publichealth/environment/water/waste_water.asp).
The owner will need to lodge an application to install/operate a Sewage Management
System under the Local government act 1993, Section 68. Council will require the
owner to have selected an AWTS manufacturer and provide Council with the
necessary plans and specifications including NSW Health Accreditation, tank
dimensions and capacity, operation and maintenance details, plus Licensed Plumber’s
name, address, phone number and license number.
The AWTS will be installed and maintained in accordance with Section 5 of the
guidelines ‘On-site Sewage Management for Single Households’ (Department of Local
Government, 1998) and AS/NZS 1547-2012 ‘On-site Domestic Wastewater
Management’ (Standards Australia, 2012). Upon approval from Wollondilly
Council, the owner is to enter into a servicing contract with an approved
servicing agent for the life of the system. Copies of the written service reports
should be lodged with Wollondilly Council following each quarterly service.
6.1.1 LOCATION OF PROPOSED AWTS
The location of the AWTS should be decided in conjunction with the licensed
plumber in consultation with the property owner. The AWTS must be positioned
on a stable, level base and be downslope of the building so there is sufficient fall from
drainage outlets in the dwelling. The location of AWTS must be
The exact location of the AWTS is to be decided by the installer in consultation with
the property owner.
It is to be at least 1.5m from any building.
A power supply (and telephone line if telemetry or an automated monitoring/ alarm
is fitted), will be required to deliver power to the treatment unit.
Shall be located above the 1% AEP (1:100) flood contour.
AWTS installation must comply with the manufacturer's recommendations, AS/NZS
3500.2:2018 Plumbing and Drainage Part 2 Sanitary Plumbing and Drainage' and
Council requirements.
6.2 PIPES
The sewer pipes between the plumbing amenities, treatment system and effluent disposal
area must conform with 'AS/NZS 3500(Set):2018 Plumbing and Drainage Set' specifying the
nominal pipe sizes and respective minimum grades. Table 1 contains these specifications.
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In addition, where a sewer carrying untreated wastewater to a treatment system is longer
than 60 metres, the minimum grade should be doubled, and inspection ports should be
installed at least every 30 metres or at an angle or change of grade.
The sewer pipes between the plumbing amenities, AWTS and irrigation area must be buried
at a depth that provides protection against mechanical damage or deformation, in
accordance with 'AS/NZS 3500.2:2018 Plumbing and Drainage Set'. Table 2 shows the
minimum pipe depth for trafficable areas.
TABLE 1 MINIMUM PIPE DIAMETER AND GRADE CALCULATIONS
Nominal pipe size (DN) Minimum grade % Minimum grade ratio
65 2.5 1:40
80 1.65 1:60
100 1.65* 1:60
125 1.25 1:80
150 1.00 1:100
* Except for drains from septic tanks, sewage treatment plants and unvented discharge pipes from
tundishes, which may have a minimum grade of 1%,
Source: ‘AS/NZS 3500.2:2018 Plumbing and drainage Part 2 Sanitary plumbing and drainage’
Table 3.4.1. NB: pipe grades are expressed as a percentage of vertical to horizontal distances.
TABLE 2 MINIMUM PIPE DEPTH FOR TRAFFICABLE AREAS
Location Minimum depth of cover (mm) for all
materials other than cast iron
Where subject to vehicular traffic 500
Elsewhere 300
Source: ‘AS/NZS 3500 (Parts 0-4):2018 Plumbing and drainage Set’. Table 3.7.2 Minimum Cover
for Buried Pipes’
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7. REQUIRED IRRIGATION AREA
The irrigation area needed to manage 800L/day wastewater load was calculated using
monthly water and nutrient balance, following the method described in DLG (1998). Soil
texture classification for Design Irrigation Rate is from ASNZ1547(2012).
The water balance requires a 238m2 irrigation area based on the following variables:
Warragamba median monthly rainfall;
Badgerys Creek monthly average evaporation; and
Application rate of 24.5mm/week or 3.5mm/day for clay loam subsoil found at
a depth of 500mm.
The nitrogen balance requires a 365m2 irrigation area based on the following variables:
AWTS will reduce Total Nitrogen to 30mg/L; and
Vegetative rate for managed pastures is assumed to be 240kg/N/ha/year
The phosphorus balance requires a 292m2 irrigation area based on the following variables:
AWTS will reduce Total Phosphorus to 12mg/L;
P-sorption of 300mg/kg for clay loam subsoil;
Bulk density of 1.5g/cm2 for intermediate soils;
Soil depth of 1m. Crop uptake is assumed to be 30kg/ha/annum; and
50-year design life of system.
The largest of the three methods (most limiting) is required. For this site, the largest area of
the three methods is 365m2.
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8. LOCATION AND METHOD OF IRRIGATION
365m2 of spray irrigation is proposed for the proposed dwelling.
Two quick coupling turf valves are connected to the buried distribution line so fixed
access points are available for the connection of a moveable hose and sprinkler. See
Appendix- Site Plan Sheet 1-3 for further information.
10. SUMMARY
This assessment recommends the following:
Installation of a domestic AWTS for wastewater treatment for the proposed dwelling;
1500m2 of the land area is available for the spray irrigation;
Installation of 365m2 spray irrigation for treated wastewater disposal at the location
shown on the site plan and installed in accordance with this report; and
Retain the remaining 1135m2 as a reserve area.
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E: Info@harrisenvironmental.com.au page | 12SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL ON 1840 SILVERDALE ROAD, SILVERDALE, NSW 11. REFERENCES Department of Local Government (1998) On-site Sewage Management for Single Households. NSW Government. Standards Australia (2012) Australian/New Zealand Standard 1547:2012 On-site domestic wastewater management. Standards Australia. NSW Health Septic Tank Accreditation Guidelines (2001). Hazelton, P.A and Murphy, B.W ed. (1992) What Do All the Numbers Mean? A Guide for the Interpretation of Soil Test Results. Department of Conservation and Land Management (incorporating the Soil Conservation Service of NSW), Sydney. Wollondilly Shire Council’s Development Control Plan. Harrisenvironmental.com.au MAY 7, 2020 Tel: (02) 4236 0954 ref 3750WW E: Info@harrisenvironmental.com.au page | 13
SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL ON 1840 SILVERDALE ROAD, SILVERDALE, NSW
APPENDIX I SEMI FIXED SPRAY IRRIGATION
a) The irrigation area is to be split into manageable areas using turf valves;
b) Within each moveable hose on the turf valve, 2 or 3 low plume wobbler/butterfly/ rose
sprinklers are to be mounted along the length of a 5m length of 19mm purple wastewater
irrigation pipe;
c) The low plume sprinklers should not be capable of producing aerosols;
d) All distribution lines shall be buried to a minimum depth of 300mm below finished surface
level or, where this is not possible, covered with 150mm of concrete;
e) The throw on the sprinklers shall not exceed beyond the designated disposal area.
f) The treated wastewater flows to each zone should be automated or manually on a regular
basis.
Management of irrigation area
g) The grass within the irrigation should be mown on a regular basis to ensure sprinklers
can be seen through the grass and any breakage or leaks can be seen and repaired;
h) The effluent disposal area shall be clearly identified within the property.
i) All stormwater and seepage from higher levels shall be diverted away from the effluent
disposal area using an upslope diversion bank or similar.
j) Fruit or salad vegetables should not be irrigated with effluent from the wastewater
treatment system.
k) The irrigation area should not be used for recreational purposes or used for parking areas.
l) Horse and cattle should not be kept within the effluent disposal area.
m) Buffer distances are 6m if area up gradient and 3m if area down gradient of swimming
pools, property boundaries and driveways; 15m buffer to buildings.
n) Two warning sign complying with AS1319:1994 – Safety signs for the occupational
environment should be located at the boundary of the designated area in one or two
places, clearly visible to property uses, with wording such as, RECYCLED WATER,
AVOID CONTACT, DO NOT DRINK’.
o) Stormwater Run-on stormwater is to be diverted around the subsurface irrigation area by
means of an earthy bank or diversion drain. Guidance on the installation of an appropriate
earth bank and diversion drain as shown in Appendix IV.
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SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL ON 1840 SILVERDALE ROAD, SILVERDALE, NSW
APPENDIX II GENERAL RECOMMENDATIONS TO MANAGE WATER QUALITY AND QUANTITY
Insinkerator style kitchen garbage disposal units should be avoided as they increase water
consumption and raise the nutrient and BOD concentrations of household effluent.
Water conservation can reduce the volume of wastewater that needs to be treated and
discharged on site. The residence should include appliances that are rated under the Water
Efficiency Labelling and Standards (WELS) Scheme that includes:
i. 4-star dual-flush toilets;
ii. 3-star showerheads;
iii. 4-star taps (for all taps other than bath outlets and garden taps);
iv. 3-star urinals; and
v. Water-efficient washing machines and dishwashers are to be specified and
used wherever possible.
Chemical cleaning compounds and other chemicals that enter the treatment system should
be low in phosphate and salt.
Anti bacterial chemical cleaning compounds and other chemicals that enter the treatment
system should be avoided. This includes chlorine, disinfectants, bleaches etc.
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APPENDIX III REQUIRED BUFFERS
The following buffers must be applied when installing all onsite sewage management
systems in accordance with the Wollondilly Council Development Control Plan
SYSTEM BUFFER DISTANCES
All Onsite Sewage 100 metres to domestic groundwater well
Management Systems 100 metres to permanent surface waters (e.g. rivers, creeks,
streams, lakes etc.)
150m to SCA named rivers
40 metres to other waters (e.g. dams, intermittent water courses,
overland flow paths etc.)
15metres from in-ground water tank
1 metre from the drip line of native trees and shrubs
Surface spray 6 metres if area up-slope and 3 metres if area down-slope of
irrigation buildings, driveways and property boundaries
15m to dwellings
3m to paths and walkways
6m to swimming pools
Subsurface irrigation 6 metres if area up-slope and 3 metres if area down-slope of
buildings, driveways and property boundaries
Absorption system 12m if area up-slope and 6m if area down-slope of property
boundary
6 metres if area up-slope and 3 metres if area down-slope of
buildings, driveways and property boundaries
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SOIL & SITE ASSESSMENT FOR ONSITE WASTEWATER DISPOSAL ON 1840 SILVERDALE ROAD, SILVERDALE, NSW
APPENDIX V WATER BALANCE
Nominated Area Water Balance for Zero Storage
Site Address: 1840 Silverdale Rd, Silverdale
INPUT DATA
Design Wastewater Flow Q 800 L/day
Design DIR (from AS/NZ 1547,2012) DIR 24.5 mm/week
Daily DIR 3.5 mm/day
Nominated Land Application Area L 238 m sq
Rainfall Data Warragamba median
Evaporation Data Badgerys Creek
Parameter Symbol Formula Units Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Total
Days in month D \ days 31 28 31 30 31 30 31 31 30 31 30 31 365
Rainfall P \ mm/month 55 81.8 22.8 19 9.9 41.6 9.2 11.4 13.2 23.5 31.5 38.5 357.4
Evaporation E \ mm/month 202 157 136 105 81 63 81 96 120 152 183 220 1557
Crop Factor C 0.80 0.75 0.70 0.65 0.60 0.60 0.60 0.60 0.65 0.70 0.75 0.80
INPUTS
Precipitation (P) mm/month 55 81.8 22.8 19 9.9 41.6 9.2 11.4 13.2 23.5 31.5 38.5 357.4
Effluent Irrigation (W) (Q x D) / L mm/month 104.2 94.1 104.2 100.8 104.2 100.8 104.2 104.2 100.8 104.2 100.8 104.2 1226.9
Inputs (P+W) mm/month 159.2 175.9 127.0 119.8 114.1 142.4 113.4 115.6 114.0 127.7 132.3 142.7 1584.3
OUTPUTS
Evapotranspiration ET ExC mm/month 162 118 95 68 49 38 49 58 78 106 137 176 1133.05
Percolation B (DIR/7)xD mm/month 108.5 98 108.5 105.0 108.5 105.0 108.5 108.5 105.0 108.5 105.0 108.5 1277.5
Outputs ET+B mm/month 270.1 215.75 203.7 173.3 157.1 142.8 157.1 166.1 183.0 214.9 242.3 284.5 2410.6
Storage remaining from previous month mm/month 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
Storage S (P+I)-(ET+B) mm/month -110.9 -39.8 -76.7 -53.4 -43.0 -0.4 -43.7 -50.5 -69.0 -87.2 -109.9 -141.8
Cumulative Storage M mm 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.00
Largest M (V) mm 0.00
(V x L)/1000 m3 0.0
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APPENDIX VI NITROGEN BALANCE
NITROGEN BALANCE
SITE ADDRESS 1840 Silverdale Rd, Silverdale
Daily volume 800 L/day
TN effluent conc 30.0 mg/L
TN 0.024 kg/d
8.76 kg/yr
Irrigation Area 365 m2 0.0365 ha
TN annual application rate 0.024 kg/m2/yr
240.0 kg/ha/yr
Denitrification 20%
TN Uptake (managed land) 240 kg/ha/yr
TN available for leaching 0 kg/ha/yr
Or for site 0.00 kg/yr
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APPENDIX VII PHOSPHORUS BALANCE
PHOSPHORUS BALANCE
SITE ADDRESS 1840 Silverdale Rd, Silverdale
Daily hydraulic load 800 L/day
TP effluent conc 12 mg/L
TP effluent conc per day 9600 mg/day
3504 g/year
P sorption rate of soil 300 mg/kg
Bulk density of soil 1.5 g/cm3
1500 kg/m3
Land application area 292.0 m2
Soil depth 1 m
Volume of soil 292.000 m3
Mass of soil 438000 kg
Total P sorption capacity 131400 g
Vegetation Grass
P annual uptake by vegetation 30 kg/ha/yr
876 g/yr
Net annual P (in soil) 2628 g/yr
Life of system 50.0 years
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PROPERTY BOUNDARY
HARRIS
S
100mm PVC PIPE
S
25mm (ID) POLY PIPE
DRAINAGE DEPRESSION
PROPOSED IRRIGATION AREA
PROPOSED RESERVE IRRIGATION
AREA
PROPOSED DWELLING
PROPOSED POOL
PROPOSED AWTS 25.6m
WATER TANK
156.7m
S S
S S
S
S
S
S
S
S
S
S
15.9m S
S
S
S
CREEK
Client Harris Environmental Consulting Project Drawing Title:
Issue: Description: Date Drawn Approved North PO Box 70 PROPOSED RESIDENTIAL ON-SITE WASTEWATER
Jamberoo, NSW, 2533
A HEC Standard Drawing 6/05/20 PS SH
LISA OSBORN T: 02 4236 0954
DWELLING MANAGEMENT SHEET 1
Drawn: Date: Scale: Q.A. Check: Date:
E: info@hec.eco LOT 2 DP 549274 Y:/Dropbox/STORMWATER DISPOSAL/Technical Drawing/tick 2.jpg
PS 6/05/2020 1:800 6/05/2020
ABN: 541 287 40 549 1840 SILVERDALE ROAD, SILVERDALE, NSW Designed: Our reference: Dwg. No. Issue:
Wastewater | Bushfire | Stormwater LGA: WOLLONDILLY PS 3750ww #1 ASITE PLAN: KEY
HARRIS
PROPERTY BOUNDARY 6.0m
S
100mm PVC PIPE
S
25mm (ID) POLY PIPE 13.5m
PROPOSED IRRIGATION AREA 22.8m
PROPOSED RESERVE IRRIGATION S S S S S S S S
AREA S S S S S S
S
S
S
S
S
S
S
PROPOSED DWELLING S
S
S
S
S
S
S
S
PROPOSED POOL S
S
S
S
S
S
WATER TANK 22.1m S
S
S
S
S
TURF VALVE S
S
S
S
FLEXIBLE HOSE
9.2m S
S
45.4m
2.1m
15.1m
6.0m 13.9m
26.7m
22.1m
Client Harris Environmental Consulting Project Drawing Title:
Issue: Description: Date Drawn Approved North PO Box 70 PROPOSED RESIDENTIAL ON-SITE WASTEWATER
Jamberoo, NSW, 2533
A HEC Standard Drawing 6/05/20 PS SH
LISA OSBORN T: 02 4236 0954
DWELLING MANAGEMENT SHEET 2
Drawn: Date: Scale: Q.A. Check: Date:
E: info@hec.eco LOT 2 DP 549274 Y:/Dropbox/STORMWATER DISPOSAL/Technical Drawing/tick 2.jpg
PS 6/05/2020 1:300 6/05/2020
ABN: 541 287 40 549 1840 SILVERDALE ROAD, SILVERDALE, NSW Designed: Our reference: Dwg. No. Issue:
Wastewater | Bushfire | Stormwater LGA: WOLLONDILLY PS 3750ww #2 AYou can also read
