exhibition file - shire of colac otway · 2019-08-15 · out using modified talsma-hallam...
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PP11/2018-1
10 Old Ocean Road SEPARATION CREEK
Lot: 1 TP: 371123 V/F: 6225/845
Construction of Two Dwellings and Two (2)
Lot Subdivision and the construction of 1.8m
high timber paling fence and associated
earthworks
Spiire Australia Pty Ltd
Officer - Helen Evans
EXHIBITION FILE
This document is made available for the sole purpose of enabling its consideration and review as part of a
planning process under the Planning and Environment Act 1987. The document must not be used for any
purpose which may breach any Copyright.
Submissions to this planning application will be accepted until a decision is made on the application.
If you would like to make a submission relating to a planning permit application, you must do so in writing
to the Planning Department
Spiire Australia Pty Ltd ABN 55 050 029 635 T 03 5249 6888
2/10 Moorabool Street PO Box 4032 Geelong VIC 3220
Our Reference 304867 Your Reference P111/2018-1
15 August 2019
Helen Evans – Statutory Planner Colac Otway Shire 2-6 Rae Street COLAC VIC 3250
Dear Helen,
Planning Application PP11/2018-1 10 Old Ocean Road, Separation Creek ‘Construction of Two Dwellings and Two (2) Lot Subdivision and the construction of 1.8m high timber paling fence and associated earthworks’
Spiire Australia Pty Ltd continue to act on behalf of Tony and Marg Batt in relation to current planning application PP11/2018-1.
Following extensive discussions with officers in Councils’ planning and health departments, please find attached an amended addendum to the LCA prepared for the abovementioned property by AGR Geosciences.
As an alternative solution to the previously proposed Wisconsin mound design, AGR has – on the advice of Councils’ Health Department, suggested a pressure compensated subsurface irrigation disposal design with separate irrigation fields be sufficient and suitable in servicing the two dwellings proposed to be constructed at 10 Old Ocean Road, Separation Creek.
In lieu of supplying an additional set of plans identifying minor variations (nominal shortening to the deck at the rear of each dwelling, a shift of approximately 0.5 metres north-west of the boundary line between the lots containing dwelling 1 and 2 and a reduction in the setback of dwelling 1 of 0.5 metres from Old Ocean Road), and to avoid further undue delays to the determination of the abovementioned application, we respectfully request a condition be attached to a future planning permit should Council determine amended plans be required.
We trust information above and within the attached revised addendum to the LCA will be to the satisfaction of Council and respectfully ask that the application be progressed to a determination as soon as possible.
Yours sincerely, Josh O’Connor Planning – Professional. CC - Tony and Marg Batt
AGR Tony Gullone
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 1
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
ADDENDUM TO LAND CAPABILITY ASSESSMENT
FOR
10 OLD OCEAN ROAD, SEPARATION CREEK
Document No. 18305LCAv2
15/8/2019
Introduction
AGR Geosciences Pty Ltd (AGR) completed a Land Capability Assessment (LCA) report for 10 Old Ocean
Road, Separation Creek on behalf of Anthony Batt (the Client) dated 26/9/2018 and revised 9/10/2018.
The report proposed two Wisconsin mounds (effective basal areas of 75m2 and 96m2) with nitrogen
buffers and advanced secondary pre-treatment with nutrient reduction as a means of managing on-
site wastewater as part of the proposed two dwelling development.
This addendum presents an alternate wastewater design option in response to concerns raised by the
Health Protection Unit (HPU) of the Colac-Otway Shire regarding the mound proposal.
Additional Site Investigation
Additional site investigation was undertaken on 27/7/2019 involving additional boreholes and in-situ
hydraulic conductivity testing. Measurement of in-situ saturated hydraulic conductivity was carried
out using modified Talsma-Hallam permeameters applying the constant head method as described in
AS1547:2012. A nest of seven (7) permeameters was installed across the site inserted to a minimum
depth of 150mm into the target layer while maintaining a least 150mm clearance from the bottom of
the hole. Constant head draw down was monitored over a period of up to 90 minutes in order to
calculate saturated hydraulic conductivity for the target soil layer. Recorded test results have been
applied to equation G1 of AS1547:2012 to calculate Ksat for the target soil layer and are presented in
Appendix V.
Additional logs with full profile descriptions are presented in Appendix VI.
Alternate Wastewater Design Option
As an alternate to the proposed Wisconsin mound design, AGR recommends a pressure compensated
subsurface irrigation disposal design with separate irrigation fields to service the two proposed
dwellings.
In order to provide two independent irrigation areas for the respective dwellings within the available
usable area, the daily flow rate for each proposed dwelling has been reduced by a minimum of 50%
from 600L/day down to 300L/day (for House 1) and from 750L/day down to 375L/day (for House 2).
To achieve this AGR proposes the introduction of a greywater recycling system used to recycle
advanced secondary treated greywater in house to all toilets and the washing machine cold tap as is
allowable under the EPA Code of Practice (891.4, 2016).
The EPA Code of Practice (891.4, 2016) states that 30% of all household water use is associated with
toilet fixtures and that an additional 30% of all household water use is associated with laundry use.
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 2
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
Given the intension is to connect the greywater recycling system to all toilets for toilet flushing and
the washing machine cold tap only, a 50% allowable flow rate reduction is considered a reasonable
reduction figure.
A reassessment of the water balance for sub-surface irrigation for House 1 using 300L/day as a new
daily flow rate provides a minimum irrigation area for zero wet weather storage of 99m2 at an
application rate of 3.0mm/day for a Category 2 Sandy Loam with a design irrigation rate of
5.0mm/day and measured ksat of 0.17m/day. The proposed final application rate is less than the
maximum allowable application rate of 5.0mm/day for Sandy Loam soils.
A reassessment of the water balance for sub-surface irrigation for House 2 using 375L/day as a new
daily flow rate provides a minimum irrigation area for zero wet weather storage of 123m2 at an
application rate of 3.0mm/day for a Category 2 Sandy Loam with a design irrigation rate of
5.0mm/day and measured ksat of 0.17m/day. The proposed final application rate is less than the
maximum allowable application rate of 5.0mm/day for Sandy Loam soils.
A revised land application area plan in provided as Appendix I while water balance calculations are
provided as Appendix II.
The minimum area for irrigation based on hydraulic modelling has been crossed referenced with a
nutrient balance for nitrogen uptake and found to be greater than the minimum area required for total
nitrogen uptake without the need for nitrogen reduction. Phosphorous modelling based on the reduced
daily flow rates and using P Sorption rates published by the Sydney Catchment Authority (2012)
indicates the proposed irrigation systems will satisfactorily maintain the minimum wastewater design
life of 25 years for House 1 and House 2 respectively without the need for phosphorous reduction.
A revised nitrogen and phosphorous balance is provided in Appendix III and Appendix IV respectively.
Description of the Irrigation Option
Pressure compensated subsurface irrigation comprises a network of drip-irrigation lines that is specially
designed for use with wastewater without the requirement of a reserve field. The pipes contain
pressure compensating emitters (drippers) that employ a biocide to prevent build-up of slimes and
inhibit root penetration.
The lateral pipes are usually 1.0m apart for a SANDY LOAM, installed parallel along the contour.
Installation depth is 100mm into a minimum of 150mm of good quality topsoil in accordance with
AS/NZS 1547:2012. It is critical that the irrigation pump be sized properly to ensure adequate
pressure and delivery rate to the irrigation network.
A filter is installed in the main line to remove fine particulates that could block the emitters. This must be cleaned regularly (typically monthly) following manufacturer’s instructions. Vacuum breakers should be installed at the high point/s in the system to prevent air and soil being sucked back into the
drippers when the pump shuts off. Flushing valves are an important component and allow periodic
flushing of the lines, which should be done at six monthly intervals. Flush water should be returned to the treatment system via a return line.
All trenching used to install the pipes must be backfilled properly to prevent preferential subsurface flows along trench lines. Irrigation areas must not be subject to high foot traffic movement, and vehicles and livestock must not have access to the area otherwise compaction around emitters can
lead to premature system failure.
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 3
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
Installation of the Irrigation System
Installation of the irrigation system must be carried out by a suitably qualified, licensed plumber or
drainer experienced with effluent irrigation systems.
To ensure even distribution of effluent, it is essential that the pump capacity is adequate for the size
and configuration of the irrigation system, taking into account head and friction losses due to changes
in elevation, pipes, valves, fittings etc. To achieve even coverage, irrigation areas should be dosed
alternately using an automatic indexing or sequencing valve and line spacing’s should be progressively increased down slope.
The irrigation area and surrounding areas must be vegetated or revegetated immediately following
installation of the system, preferably with turf or dense ground covering shrubs and grasses with high
transpiration rates. The area should be fenced or otherwise isolated (such as by landscaping), to
prevent vehicle and stock access; and signs should be erected to inform householders and visitors of
the extent of the effluent irrigation area and to limit their access and impact on the area.
Stormwater run-on is expected to pose only a slight amount of concern for the proposed disposal
areas. Upslope diversion berms and surface drainage should be constructed during installation of the
disposal system and connected to the site drainage system and diverted to the legal point of discharge.
Stormwater from roofs and other impervious surfaces must not be disposed of into the wastewater
treatment system or onto the effluent management system.
Treatment System
For this site we recommend a minimum of secondary level treatment with advanced secondary level
treatment of greywater for in-house recycling.
The minimum “all waste” secondary effluent quality required for irrigation is:
▪ BOD < 20 mg/L
▪ TSS < 30 mg/L
▪ E.Coli < 10 cfu/100mg
The minimum advanced secondary (tertiary) effluent quality required for greywater recycling is:
▪ BOD < 10 mg/L
▪ TSS < 10 mg/L
▪ E.Coli < 10 cfu/100mg
Refer to the EPA website for the list of approved options that are available1. Many of the secondary or
advanced secondary treatment system options are capable of achieving the desired level of
performance. The property owner has the responsibility for the final selection of the secondary
treatment system and will include the details of it in the Septic Tank Permit to Install application form
for Council approval.
Alternative treatment methods which are able to produce high quality wastewater are Membrane
Bioreactor or MBR systems and Trickling Filters. MBR’s combine treatment technologies such as aerated water treatment systems (AWTS) and membrane filtration. They typically use a pre-treatment
settling tank, followed by aerobic bioreactor (AWTS) and finally a filter membrane followed by
disinfection with UV for higher quality waste water. Trickling Filters such as generic sand filters use
aerobic biological processes and mechanical filtration to treat effluent. They incorporate a settling or
septic tank (which may be generic or alternative such as a worm farm) for primary treatment after
which effluent is applied to the filter and then may be disinfected with either by chlorine or UV. Other
1 http://www.epa.vic.gov.au/en/your-environment/water/onsite-wastewater
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 4
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
methods of secondary treatment system such as Aerated Wastewater Treatment System’s (AWTS) are also acceptable utilising disinfection to achieve advanced secondary standard.
Further consideration should be given to selecting a system that includes a suitably sized storage or
balancing tank to moderate flow into the wastewater treatment system or a system that integrally
uses multiple chambers where intermittent or periodic surge flows are expected. Where an AWTS is
to be considered in this situation, selection of a system which includes recirculation or some other
technology to accommodate intermittent flow is recommended.
Conclusions
As a result of the further investigation we conclude that sustainable onsite wastewater management
is feasible for the proposed development at 10 Old Ocean Road Separation Creek.
Specifically, to achieve the desired wastewater footprint we recommend the following:
▪ Secondary treatment of ‘All Waste’ by aerated treatment plant with disinfection and separate advanced secondary treatment of greywater for in-house recycling to toilets and the washing
machine cold tap.
▪ Reduced daily flow rate for House 1 from 600L/day for a 3-bedroom dwelling to 300L/day
(50% reduction).
▪ Reduced daily flow rate for House 2 from 750L/day for a 4-bedroom dwelling to 375L/day
(50% reduction).
• Disposal via pressure compensated subsurface irrigation to 99m2 for House 1 at an application
rate of 3.0mm/day.
• Disposal via pressure compensated subsurface irrigation to 123m2 for House 2 at an
application rate of 3.0mm/day.
▪ Detailed documentation of the as built irrigation design, including the filter, manifold, irrigation
line location and diameter, number and length of dripper lines, number and location of vacuum
breaker(s), sequencing valve(s), location of flush valve(s) and the location of the return line
returning flush water back to the treatment system.
▪ Installation of 3 star or better water saving fixtures and appliances both dwellings to conserve
water and reduce the effluent load;
▪ Operation and management of the treatment and disposal system in accordance with
manufacturer’s recommendations, the EPA Certificate of Approval, the EPA Code of Practice
(2016) and the recommendations made in this report.
DAVID J HORWOOD BAppSc (Geology); AusIMM CP (Geo)
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 5
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
Appendix I – Land Application Area Plan
Recommended cut off drainage
Recommended fugi AWTS and Wastewater Australia grey water treatment system (actual scaled dimensions)
1.5m
3.0m
3.0m
3.0m
1.5m
3.0m
3.0m
1.5m
Recommended cut off drainage
Recommended Fugi AWTS and Wastewater Australia grey water treatment system (actual scaled dimensions)
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 6
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
Appendix II – Irrigation Water Balance: House 1
Project: Job No.:
Comp: DH
Date: 14/08/2019
Client: Attendee: DH
Subject: Review: DH
INPUT DATA
Design Wastewater Flow Q 300 L/day
Design Seepage Rate DSR 5.0 mm/day
Trial Land Application Area LAA 99 m2
Crop Factor C Fescue unitless
Rainfall Runoff Factor RF 0.75 untiless
Effective Void Ratio N 0.3 unitless
Minimum Freeboard Topsoil Layer F 100 mm
Mean Monthly Pan Evaporation Data
Mean Monthly Rainfall Data BoM Station =
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
Evaporation E mm/month 129 106 90 58 39 28 32 44 61 87 102 121 897.0
Rainfall R mm/month 43 45 57 71 99 105 112 128 108 94 65 54 981.0
Crop Factor C unitless 0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80
OUTPUTS
Evapotranspiration ET E x C mm/month 103.2 84.8 72.0 46.4 31.2 22.4 25.6 35.2 48.8 69.6 81.6 96.8 718
Seepage S DSR x D mm/month 155.0 140.0 155.0 150.0 155.0 150.0 155.0 155.0 150.0 155.0 150.0 155.0 1825.0
Total Outputs ET+S mm/month 258.2 224.8 227.0 196.4 186.2 172.4 180.6 190.2 198.8 224.6 231.6 251.8 2542.6
INPUTS
Retained Rainfall RR R x RF mm/month 32.3 33.8 42.8 53.3 74.3 78.8 84.0 96.0 81.0 70.5 48.8 40.5 735.8
Applied Effluent W QxD L/month 9300 8400 9300 9000 9300 9000 9300 9300 9000 9300 9000 9300 109500
Total Inputs RR+W mm/month 41.6 42.2 52.1 62.3 83.6 87.8 93.3 105.3 90.0 79.8 57.8 49.8 845.3
DISPOSAL RATE
Disposal Rate DR (ET+S)-RR mm/month 226.0 191.1 184.3 143.2 112.0 93.7 96.6 94.2 117.8 154.1 182.9 211.3
LAND AREA REQUIRED FOR ZERO STORAGE m2
41 44 50 63 83 96 96 99 76 60 49 44
MINIMUM AREA REQUIRED FOR ZERO STORAGE: 99 m2
ADOPTED LAND APPLICATION AREA: 99 m2
DESIGN APPLICATION RATE: 3.0 mm/day
STORAGE CALCULATION
Application Rate AR Q/LAA mm/month 93.9 84.8 93.9 90.9 93.9 90.9 93.9 93.9 90.9 93.9 90.9 93.9
Storage For The Month ST AR-DR mm/month -132.0 -106.2 -90.3 -52.2 -18.0 -2.7 -2.7 -0.3 -26.9 -60.2 -91.9 -117.4
Increase In Depth Of Stored Effluent ΔH ST/N mm/month -440.0 -354.0 -301.0 -174.1 -60.0 -9.1 -8.9 -0.9 -89.6 -200.5 -306.5 -391.2
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
Cumulative Storage At End Of Month CS 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
Cumulative Storage From Previous Year CS 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
Maximum Storage Depth for Nominated Area MS 0 mm
BoM ave monthly evaporate maps
Tony Batt
Land Application Area Sizing Using Water Balance - House 1 Irrigation (50% flow rate reduction)
WATER BALANCE COMPUTATION SHEET
10 Old Ocean Road 18I305LCA
Separation Creek
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 7
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
Appendix II – Irrigation Water Balance: House 2
Project: Job No.:
Comp: DH
Date: 8/08/2019
Client: Attendee: DH
Subject: Review: DH
INPUT DATA
Design Wastewater Flow Q 375 L/day
Design Seepage Rate DSR 5.0 mm/day
Trial Land Application Area LAA 123 m2
Crop Factor C Fescue unitless
Rainfall Runoff Factor RF 0.75 untiless
Effective Void Ratio N 0.3 unitless
Minimum Freeboard Topsoil Layer F 100 mm
Mean Monthly Pan Evaporation Data
Mean Monthly Rainfall Data BoM Station =
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
Evaporation E mm/month 129 106 90 58 39 28 32 44 61 87 102 121 897.0
Rainfall R mm/month 43 45 57 71 99 105 112 128 108 94 65 54 981.0
Crop Factor C unitless 0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80 0.80
OUTPUTS
Evapotranspiration ET E x C mm/month 103.2 84.8 72.0 46.4 31.2 22.4 25.6 35.2 48.8 69.6 81.6 96.8 718
Seepage S DSR x D mm/month 155.0 140.0 155.0 150.0 155.0 150.0 155.0 155.0 150.0 155.0 150.0 155.0 1825.0
Total Outputs ET+S mm/month 258.2 224.8 227.0 196.4 186.2 172.4 180.6 190.2 198.8 224.6 231.6 251.8 2542.6
INPUTS
Retained Rainfall RR R x RF mm/month 32.3 33.8 42.8 53.3 74.3 78.8 84.0 96.0 81.0 70.5 48.8 40.5 735.8
Applied Effluent W QxD L/month 11625 10500 11625 11250 11625 11250 11625 11625 11250 11625 11250 11625 136875
Total Inputs RR+W mm/month 43.9 44.3 54.4 64.5 85.9 90.0 95.6 107.6 92.3 82.1 60.0 52.1 872.6
DISPOSAL RATE
Disposal Rate DR (ET+S)-RR mm/month 226.0 191.1 184.3 143.2 112.0 93.7 96.6 94.2 117.8 154.1 182.9 211.3
LAND AREA REQUIRED FOR ZERO STORAGE m2
51 55 63 79 104 120 120 123 96 75 62 55
MINIMUM AREA REQUIRED FOR ZERO STORAGE: 123 m2
ADOPTED LAND APPLICATION AREA: 123 m2
DESIGN APPLICATION RATE: 3.0 mm/day
STORAGE CALCULATION
Application Rate AR Q/LAA mm/month 94.5 85.4 94.5 91.5 94.5 91.5 94.5 94.5 91.5 94.5 91.5 94.5
Storage For The Month ST AR-DR mm/month -131.4 -105.7 -89.7 -51.7 -17.4 -2.2 -2.1 0.3 -26.3 -59.6 -91.4 -116.8
Increase In Depth Of Stored Effluent ΔH ST/N mm/month -438.1 -352.3 -299.1 -172.3 -58.1 -7.3 -7.0 1.0 -87.8 -198.6 -304.6 -389.3
Storage Remaining From Previous Month mm/month 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 0.0 0.0 0.0
Cumulative Storage At End Of Month CS mm 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 0.0 0.0 0.0 0.0
Cumulative Storage From Previous Year CS mm 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 0.0 0.0 0.0 0.0
Maximum Storage Depth for Nominated Area MS 1 mm
BoM ave monthly evaporate maps
Land Application Area Sizing Using Water Balance - House 2 Irrigation (50% flow rate reduction)
WATER BALANCE COMPUTATION SHEET
18I305LCA
Tony Batt
10 Old Ocean Road
Separation Creek
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 8
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
Appendix III – Nitrogen Balance: House 1
Site Address:100 m2
Hydraulic Load 300 L/day Crop N Uptake 220 kg/ha/yr which equals 60.27 mg/m2/day
Effluent N Concentration 25 mg/L
0.2 Decimal
1500 mg/day
6000 mg/day
Minimum Area required with zero buffer
Nitrogen 100 m2 99 m2
0.012 kg/year 0.545455
0.545455 m2
CELLS
Please enter data in blue cells
XX Red cells are automatically populated by the spreadsheet
XX Data in yellow cells is calculated by the spreadsheet, DO NOT ALTER THESE CELLS
NOTES1 Model sensitivity to input parameters will affect the accuracy of the result obtained. Where possible site specific data should be used. Otherwise
data should be obtained from a reliable source such as:
- EPA Guidelines for Effluent Irrigation
- Appropriate Peer Reviewed Papers
- Environment and Health Protection Guidelines: Onsite Sewage Management for Single Households
- USEPA Onsite Systems Manual
% N Lost to Soil Processes (Geary & Gardner 1996)
Total N Loss to Soil
Remaining N Load after soil loss
NITROGEN BALANCE BASED ON ANNUAL CROP UPTAKE RATESDetermination of Buffer Zone Size for a Nominated Land Application Area (LAA)
Nominated LAA Size
INPUT DATA1
Wastewater Loading Nutrient Crop Uptake
Predicted N Export from LAA
Minimum Buffer Required for excess nutrient
Nitrogen Balance
10 Old Ocean Road Separation Creek - House 2SUMMARY - LAND APPLICATION AREA REQUIRED BASED NITROGEN BALANCE
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 9
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
Appendix III – Nitrogen Balance: House 2
Site Address:149 m2
Hydraulic Load 450 L/day Crop N Uptake 220 kg/ha/yr which equals 60.27 mg/m2/day
Effluent N Concentration 25 mg/L
0.2 Decimal
2250 mg/day
9000 mg/day
Minimum Area required with zero buffer
Nitrogen 149 m2 123 m2
0.579 kg/year 26.31818
26.31818 m2
CELLS
Please enter data in blue cells
XX Red cells are automatically populated by the spreadsheet
XX Data in yellow cells is calculated by the spreadsheet, DO NOT ALTER THESE CELLS
NOTES1 Model sensitivity to input parameters will affect the accuracy of the result obtained. Where possible site specific data should be used. Otherwise
data should be obtained from a reliable source such as:
- EPA Guidelines for Effluent Irrigation
- Appropriate Peer Reviewed Papers
- Environment and Health Protection Guidelines: Onsite Sewage Management for Single Households
- USEPA Onsite Systems Manual
% N Lost to Soil Processes (Geary & Gardner 1996)
Total N Loss to Soil
Remaining N Load after soil loss
NITROGEN BALANCE BASED ON ANNUAL CROP UPTAKE RATESDetermination of Buffer Zone Size for a Nominated Land Application Area (LAA)
Nominated LAA Size
INPUT DATA1
Wastewater Loading Nutrient Crop Uptake
Predicted N Export from LAA
Minimum Buffer Required for excess nutrient
Nitrogen Balance
10 Old Ocean Road Separation Creek - House 2SUMMARY - LAND APPLICATION AREA REQUIRED BASED NITROGEN BALANCE
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 10
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
Appendix IV – Phosphorus Balance: House 1
Project:
Client:
Subject:
Formula Symbol Units
B
(B x p) p EPA 891.4
qp L EPA 891.4
(p x qp) Q L/day EPA 891.4
P conc 10 mg/L AS1547:2012 or system certification
(P conc x Q) P day mg/day
P ann g/yr
LAA 99 m2
from water balance or mound design
PSI 75 mg/kg SCA
1.8 g/cm3
measured
kg/m3
d m measured
(LAA x d) V m3
( V x D) M kg
(M x PSI) TP sorp g
kg/ha Myers et al (1999); EPA 168
g/yr
(P ann - P up) g/yr
25.1 Yr
Net annual P 798
Life of system
Vegetation Grass
P annual uptake by vegetation(LAA x P up)
P up30
297
Volume of soil 148.5
Mass of soil 267300
Total P sorption of soil 20047.5
Soil depth 1.5
Land application area
P sorption rate of soil
Bulk density of soil D1800
Daily P load 3000
Annual P load 1095
Influent TP conc
Parameter Value
No. Bedrooms 3
No. Occupants 4
Daily flow rate/occupant 150
Design total daily flow rate 300
Life of System - House 1 Review: DH
PHOSPHOROUS BALANCE COMPUTATION SHEET
10 Old Ocean Road Job No.: 18I305LCA
Separation Creek Comp: DH
Date: 14/08/2019
Tony Batt Attendee: DH
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 11
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
Appendix IV – Phosphorus Balance: House 2
Project:
Client:
Subject:
Formula Symbol Units
B
(B x p) p EPA 891.4
qp L EPA 891.4
(p x qp) Q L/day EPA 891.4
P conc 10 mg/L AS1547:2012 or system certification
(P conc x Q) P day mg/day
P ann g/yr
LAA 123 m2
from water balance or mound design
PSI 75 mg/kg SCA
1.8 g/cm3
measured
kg/m3
d m measured
(LAA x d) V m3
( V x D) M kg
(M x PSI) TP sorp g
kg/ha Myers et al (1999); EPA 168
g/yr
(P ann - P up) g/yr
24.9 Yr
Net annual P 999.75
Life of system
Vegetation Grass
P annual uptake by vegetation(LAA x P up)
P up30
369
Volume of soil 184.5
Mass of soil 332100
Total P sorption of soil 24907.5
Soil depth 1.5
Land application area
P sorption rate of soil
Bulk density of soil D1800
Daily P load 3750
Annual P load 1368.75
Influent TP conc
Parameter Value
No. Bedrooms 3
No. Occupants 4
Daily flow rate/occupant 150
Design total daily flow rate 375
Life of System - House 2 Review: DH
PHOSPHOROUS BALANCE COMPUTATION SHEET
10 Old Ocean Road Job No.: 18I305LCA
Separation Creek Comp: DH
Date: 14/08/2019
Tony Batt Attendee: DH
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 12
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
Appendix V – Ksat Computations
COMPUTATION SHEET
Project: Job No.: 18I305LCA
Comp: DH
Date: 8/08/2019
Client: Attendee: DH
Subject: Review: DH
SOIL PERMEABILITY CALCULATIONS
Refer Site Investigation Plan for locations of test sites
Refer Borehole Profiles for soil types and depths encountered
Test Number: 1 2 3 4 5 6 7 8
Time Step (min): 5 5 5 5 5 5 5
Hole Depth(mm): 350 400 350 300 400 350 400
Hole Dia. (mm) 75 75 75 75 75 75 75
Tube Inside Dia. (mm): 40 40 40 40 40 40 40
Lim. Layer Depth(mm): 100 100 100 100 100 100 100
Lim. Layer Material: CSS CSS CSS CSS CSS CSS CSS
Tube Insert. Depth: 150 150 150 150 150 150 150
Tube Number:
Test Liquid: Tap Water Tap Water Tap Water Tap Water Tap Water Tap Water Tap Water
Soil Moisture: moist moist moist moist moist moist moist
Time
Time 0 80 110 40 147 52 131 175
Reading: 5 84 194 45 172 240 220 202
Drop: 4 84 5 25 188 89 27
Reading: 10 97 277 45 200 330 280 255
Drop: 13 83 0 28 90 60 53
Reading: 15 130 385 45 230 430 345 310
Drop: 33 108 0 30 100 65 55
Reading: 20 145 450 45 270 545 412 375
Drop: 15 65 0 40 115 67 65
Reading: 25 180 540 45 305 655 475 430
Drop: 35 90 0 35 110 63 55
Reading: 30 195 620 45 325 770 545 490
Drop: 15 80 0 20 115 70 60
Reading: 35 220 705 45 340 880 600 535
Drop: 25 85 0 15 110 55 45
Reading: 40 255 790 45 365 660 590
Drop: 35 85 0 25 60 55
Reading: 45 275 870 45 400 715 640
Drop: 20 80 0 35 55 50
Reading: 50 300 45 435 780 705
Drop: 25 0 35 65 65
Reading: 55 320 45 475 830 750
Drop: 20 0 40 50 45
Reading: 60 330 60 500 780
Drop: 10 15 25 30
Reading: 65 345 80 530 815
Drop: 15 20 30 35
Reading: 70 370 95 570
Drop: 25 15 40
Reading: 75 385 605
Drop: 15 35
Reading: 80 425
Drop: 5 40
Reading: 85
Drop:
Reading: 90
Drop:
10 Old Ocean Road
Separation Creek
Soil Permeability Calculations
Tony Batt
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 13
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
1 2 3 4 5 6 7 8
Starts uniform drop 35 10 45 10 5 10
Stops uniform drop 55 40 75 35 45 50
Time elapsed(min) 20 30 30 25 40 40
Total Drop (cm) 10.0 51.3 20.5 55.0 49.5 45.0
z 2.7 3.3 2.0 3.3 2.7 3.3
Flow, Q (cm3/min) 6.3 21.5 8.6 27.6 15.6 14.1
Ksat (cm/min) 0.0056 0.0141 0.0110 0.0182 0.0138 0.0093
Ksat (m/day) 0.080 0.204 0.159 0.262 0.199 0.134
Average Ksat (m/day) 0.1730
0
20
40
60
80
100
120
140
160
180
200
0 10 20 30 40 50 60 70 80 90
ΔH
eig
ht
(pe
r 5 m
in in
cre
me
nt)
, m
m
Time Elapsed, min
Test No. 1
Test No. 2
Test No. 3
Test No. 4
Test No. 5
Test No. 6
Test No. 7
Test No. 8
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 14
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
Appendix VI – Additional Borelogs
Ex
cav
ato
in M
eth
od
Gra
ph
ic L
og
Ho
rizo
n
Te
xtu
re
Str
uct
ure
Sh
ad
e
Mo
istu
re
Co
ars
e F
rag
me
nts
Bo
un
da
ry T
yp
e
Sa
mp
le
100 Topsoil Topsoil clayey, sandy SILT FSL Dk Br M <10%
200 Topsoil Category 2 Sandy loams
300 Topsoil
400 Topsoil
500 Topsoil
600 Topsoil
700 Topsoil
800 Topsoil
900 Topsoil Topsoil sandy, clayey SILT SCL Lt Gy / Br M <10%
1000 Topsoil Category 4 Clay loams
1100 Topsoil
1200 Topsoil
1300 Topsoil With Gravel
1400 Topsoil
1500 Topsoil
1600 Topsoil
1700 Topsoil
1800 Topsoil
1900 Refusal Gravels
2000
2100
2200
2300
2400
2500
Comment:
Texture: Moisture: Structure:
S Sand ZL Silty Loam SiC Silty Clay D Dry Gr (Single) Grained
LS Loamy Sand SCL Sandy Clay Loam LC Light Clay SM Slightly Moist Mas Massive
CS Clayey Sand CL Clay Loam LMC light Med Clay M Moist Wk Weakly Structured
SL Sandy Loam ZCL Silty Clay Loam MC Medium Clay VM Very Moist Md Mod Structured
FSL Fine Sandy Loam FSCL Fine Sandy Clay Loam HC Heavy Clay W Wet St Strongly Structured
L Loam SC Sandy Clay
Colour: Dk Dark Lt Light Bk Black Br Brown Gy Grey Or Orange Yl Yellow Re Red Bl Blue Gn Green
Groundwater q Boundary Type: Sharp <5mm Abrut 5-20mm Clear 20-50mm
Sample: 1 Gradual 50-100mm Diffues >100mm
Co
nti
nu
ou
s F
ligh
t A
ug
er
De
pth
Bore Hole
29.7.2019
Field work Completed By:
Field Work Date:
AGR GeoSciences
Material Description
No. 1
Reference No:
Mo
ttle
s
10 Old Ocean Rd Sep. Creek
Client:
David Horwood
Tony Batt
Co
lou
r
Project Address:
18L305LCA
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 15
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
Ex
cav
ato
in M
eth
od
Gra
ph
ic L
og
Ho
rizo
n
Te
xtu
re
Str
uct
ure
Sh
ad
e
Mo
istu
re
Co
ars
e F
rag
me
nts
Bo
un
da
ry t
yp
e
Sa
mp
le
100 Topsoil Topsoil clayey, sandy SILT FSL Dk Br M <10%
200 Topsoil Category 2 Sandy loams
300 Topsoil 1
400 Topsoil
500 Topsoil
600 Topsoil
700 Topsoil Topsoil gravelly, sandy SILT SL Dk Gy / Br SM >20%
800 Topsoil Category 2 Sandy loams
900 Topsoil
1000 Topsoil
1100 Topsoil Topsoil sandy, clayey SILT SCL Lt Gy / Br SM <10% 2
1200 Topsoil Category 4 Clay loams
1300 Topsoil
1400 Topsoil
1500 Topsoil
1600 Topsoil
1700 Topsoil
1800 Topsoil
1900 Topsoil
2000 Topsoil
2100 EOH
2200
2300
2400
2500
Comment:
Texture: Moisture: Structure:
S Sand ZL Silty Loam SiC Silty Clay D Dry Gr (Single) Grained
LS Loamy Sand SCL Sandy Clay Loam LC Light Clay SM Slightly Moist Mas Massive
CS Clayey Sand CL Clay Loam LMC light Med Clay M Moist Wk Weakly Structured
SL Sandy Loam ZCL Silty Clay Loam MC Medium Clay VM Very Moist Md Mod Structured
FSL Fine Sandy Loam FSCL Fine Sandy Clay Loam HC Heavy Clay W Wet St Strongly Structured
L Loam SC Sandy Clay
Colour: Dk Dark Lt Light Bk Black Br Brown Gy Grey Or Orange Yl Yellow Re Red Bl Blue Gn Green
Groundwater q Boundary Type: Sharp <5mm Abrut 5-20mm Clear 20-50mm
Sample: 1 Gradual 50-100mm Diffues >100mm
Co
nti
nu
ou
s F
ligh
t A
ug
er
De
pth
Bore Hole
29.7.2019Field Work Date:
10 Old Ocean Rd Sep. Creek
AGR GeoSciences
Material Description
No. 2
18L305LCA
Mo
ttle
s
Project Address:
Client:
David Horwood
Reference No:
Tony Batt
Co
lou
r
Field work Completed By:
AGR GEOSCIENCES PTY LTD
AGR GeoSciences Pty Ltd
ABN: 32 601 372 632
ACN: 601 372 632 16
P PO Box 178 Mount Clear VIC 3350 Ph 03 5332 2917 E [email protected] W agrgeo.com.au
Ex
cav
ato
in M
eth
od
Gra
ph
ic L
og
Ho
rizo
n
Te
xtu
re
Str
uct
ure
Sh
ad
e
Mo
istu
re
Co
ars
e F
rag
me
nts
Bo
un
da
ry t
yp
e
Sa
mp
le
100 Topsoil Topsoil clayey, sandy SILT FSL Dk Br SM <10%
200 Topsoil Category 2 Sandy loams
300 Topsoil
400 Topsoil
500 Topsoil
600 Topsoil Trace Gravel
700 Topsoil 3
800 Topsoil
900 Topsoil
1000 Topsoil
1100 Topsoil Topsoil gravelly, sandy SILT SL Dk Gy / Br SM >20%
1200 Topsoil Category 2 Sandy loams
1300 Topsoil
1400 Refusal Gravels
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
Comment:
Texture: Moisture: Structure:
S Sand ZL Silty Loam SiC Silty Clay D Dry Gr (Single) Grained
LS Loamy Sand SCL Sandy Clay Loam LC Light Clay SM Slightly Moist Mas Massive
CS Clayey Sand CL Clay Loam LMC light Med Clay M Moist Wk Weakly Structured
SL Sandy Loam ZCL Silty Clay Loam MC Medium Clay VM Very Moist Md Mod Structured
FSL Fine Sandy Loam FSCL Fine Sandy Clay Loam HC Heavy Clay W Wet St Strongly Structured
L Loam SC Sandy Clay
Colour: Dk Dark Lt Light Bk Black Br Brown Gy Grey Or Orange Yl Yellow Re Red Bl Blue Gn Green
Groundwater q Boundary Type: Sharp <5mm Abrut 5-20mm Clear 20-50mm
Sample: 1 Gradual 50-100mm Diffues >100mm
AGR GeoSciences
29.7.2019
10 Old Ocean Rd Sep. Creek Field work Completed By:
Client:
David HorwoodProject Address:
Bore Hole No. 3
Co
nti
nu
ou
s F
ligh
t A
ug
er
Field Work Date:
Tony Batt
Reference No:
Material Description
De
pth
18L305LCA
Mo
ttle
s
Co
lou
r