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The business of sustainability
Dam Water and Sediment Assessment
14 Clarke Street, Riverstone NSW 2765
Elite International Investments Pty Ltd
Report Date: 5/06/2018
Project No.: 0462359
S008547
24 November 2017
Elite International Investments Pty Ltd
Document control number: S008547
0462359_S008547_Dam Water and Sediment Assessment_14 Clarke St Riverstone_R1.docx
Elite International Investments Pty Ltd
i
Project name:
Dam Water and Sediment Assessment
Document control number: S008547
Prepared for: Elite International Investments Pty Ltd
© Copyright 2018 by ERM Worldwide Group Ltd and / or its affiliates (“ERM”).
All rights reserved. No part of this work may be reproduced or transmitted in any form,
or by any means, without the prior written permission of ERM
Document history
ERM approval to issue
Version Revision Author Reviewed by Name Date Comments
V1.0 R01 Russell
Jarman
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Table of contents
1 Introduction ................................................................................................... 1
1.1 General ........................................................................................................................... 1
1.2 Objective ......................................................................................................................... 1
1.3 Site Features .................................................................................................................. 1
2 Site Assessment ........................................................................................... 2
2.1 Overview ......................................................................................................................... 2
2.2 Site Assessment Criteria ................................................................................................ 2
2.2.1 Dam Water .............................................................................................................. 2
2.2.2 Sediment ................................................................................................................. 3
2.3 Sampling Strategy .......................................................................................................... 3
3 Water Quality Assessment ............................................................................ 4
4 Sediment Assessment .................................................................................. 6
4.1 Total Recoverable Hydrocarbons and Monocyclic Aromatic Hydrocarbons .................. 6
4.2 Polycyclic Aromatic Hydrocarbons ................................................................................. 6
4.3 Pesticides and Polychlorinated Biphenyls ...................................................................... 6
4.4 Heavy Metals .................................................................................................................. 6
4.5 Faecal Coliforms ............................................................................................................. 7
5 Recommendations ........................................................................................ 8
5.1 Dam Water ..................................................................................................................... 8
5.2 Sediments ....................................................................................................................... 8
6 Conclusion .................................................................................................... 9
List of Figures
Figure 1: Site Location
Figure 2: Site Layout
Appendices
Appendix A: Laboratory Results
Appendix B: Dam Decommissioning Work Method Procedure
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1 Introduction
1.1 General
ERM Services Australia Pty Ltd (ERM) was commissioned by Elite International Investments
Pty Ltd to conduct a water and sediment quality assessment of a water storage dam within
the property located at 14 Clarke Street, Riverstone NSW, and identified as Lot 1 Deposited
Plan 30211 (the site).
Refer to Figure 1 – Site Location.
1.2 Objective
The objective of this report is to assess the suitability of the dam water for future discharge,
and the suitability of dam sediments to be retained or beneficially reused on-site under the
proposed future land use.
In particular, the assessment has been designed to assist with the dewatering and
decommissioning of the dam in an environmentally sensitive manner without unacceptable
risk to human health or the environment.
1.3 Site Features
The Site is located along Riverstone road via unsealed tracks to the north. The Site appears
to have previously been utilised for cattle grazing however at the time of inspection appeared
disused. The Site ranges from 55m elevation to the south east sloping to 42m to the north
west.
For the purpose of this report, the dam subject to assessment is identified as ‘Dam A’.
Dam A is roughly oval in shape and situated within the northern part of the site, fronting
Riverstone Road.
Dam A is approximately 760 m2 in size with a capacity of approximately 2,000 m3, which is
equivalent to 2 ML of water.
Water within the dam appears to be sourced from localised site runoff from the surrounding
land and is a constructed dam, with surplus water flowing to the north west toward Riverstone
road.
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2 Site Assessment
2.1 Overview
The site is planned for a residential subdivision. To facilitate this the existing dam on the Site
is required to be decommissioned.
Sampling and laboratory analysis of water contained within Dam A was requested by the
Client to identify the most appropriate discharge method that will not adversely impact the
receiving environment or nearby water bodies.
Sampling and laboratory analysis of sediment within the base of Dam A was requested by the
Client to assess the suitability of the material for beneficial on-site reuse or to facilitate
appropriate off-site disposal.
Dam A was initially assessed by DLA Environmental Services on 8 June 2017 (Report
DL4140_S007004 issued July 2017). A follow up assessment was conducted by ERM
Services Australia (Formally DLA) on the 22 May 2018 to assess the validity of the previous
recommendations.
2.2 Site Assessment Criteria
2.2.1 Dam Water No stormwater system or creeks were observed in the immediate vicinity of the site to
facilitate discharge of dam water. The closest receiving waters to the site is First Ponds
Creek which is located approximately 150 m to the west.
Based on this, application of the water directly to the site is expected to be the most practical
method of dewatering. As such, water quality results have been compared against the
following:
stormwater reuse criteria (NSW DEC, 2006);
irrigation trigger values (ANZECC, 2000);
recreational secondary contact trigger values (ANZECC, 2000); and
aquatic ecosystem trigger values, specifically the freshwater 95% Trigger Values
(ANZECC, 2000).
These criteria have been adopted in order to minimise the likelihood for dewatering activities
to pollute receiving waters which would constitute an offence under the Protection of the
Environment Operations Act NSW 1997 (NSW). An assessment of the Site groundwater
conditions was beyond the scope of this report. Given the minimal duration of the dewatering
activity it is expected to have minimal impact on surrounding groundwater conditions.
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2.2.2 Sediment Sediment assessment is required to demonstrate the sediments to be excavated from the
base of the dam meet the land use suitability criteria adopted for the site. The intended reuse
of the sediments will be as soil during the site redevelopment works.
Given the reuse of the sediments as soils that are intended redevelopment of the site for low
density residential purposes, chemical laboratory results have been compared against the
health investigation and screening levels applicable to Residential A – Residential with
Garden / Accessible soils (NEPC, 2013).
Microbiological data has been obtained from Environmental Guidelines: Use and Disposal of
Biosolid Products (NSW EPA, 1997).
2.3 Sampling Strategy
Two water samples were collected from two sampling events from the dam using a
decontaminated HDPE 0.5L beaker attached to an extendable aluminium pole. A sampling
density of two samples was selected based on field observations and dam size, with the two
sampling events addressing any potential changes within the dam due to the report being 12
months since the sampling event. The samples were immediately transferred to laboratory
prepared and supplied glass and plastic bottles with appropriate preservation.
Sediment samples were collected from the edge of the dam using a decontaminated trowel.
The samples were immediately transferred to laboratory prepared and supplied glass jars
fitted with Teflon-lined caps.
Job number; sample identification number; sampler’s initials and date of sampling were
recorded on sample labels affixed to the sample containers.
All samples were placed into a chilled cooler to minimise the likelihood for the loss of potential
volatile components during storage and transport. The samples were transported under
standard ERM chain-of-custody protocols to the NATA accredited laboratory – Envirolab
Services Pty Ltd. All samples were stored and transported at temperatures below 4°C.
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3 Water Quality Assessment
The dam was visually inspected and sampled on the 8 June 2017 and 22 May 2018. During
both sampling events the water was observed to be free of scums, odours and films.
The results of the laboratory analysis are summarised in Table 1.
Table 1 – Water Quality Results (µg/L)
SAMPLE ID W5 W6 W1 W2 RE-USE CRITERIA
DISCHARGE CRITERIA
SAMPLE DATE 8 June 2017 22 May 2018
pH 7.4 6.7 7.0 7.1 6.5 – 8.5 6.5 – 8.5
Electrical
Conductivity
(µS/cm)
100 100 220 210 1,000 1,000
TSS (mg/l) - 54 16 58 50a 40b
BOD <5 - 26 66 -- <15b
OC Pesticides <0.1 <0.1 <0.2 <0.2 -- --
OP Pesticides <0.1 <0.1 <0.2 <0.2 -- --
Arsenic 1 1 <1 1 -- 13
Cadmium <0.1 <0.1 <0.1 <0.1 -- 0.2
Chromium 2 1 <1 <1 -- 1
Copper 3 3 <1 <1 -- 1.4
Lead <1 <1 <1 <1 -- 3.4
Mercury <0.05 <0.05 <0.05 <0.05 -- 0.6
Nickel 1 1 <1 <1 -- 11
Zinc 9 10 1 4 -- 8
Faecal Coliform
(MPN/100mL) 2400 2200 230 230 1,000 1,000
a: based on concentrations that may result in blockages or operational issues in irrigation sprays.
b: Protection of aquaculture species (ANZECC, 2000).
Bold denotes exceedance of reuse or discharge criteria.
The results of the laboratory analysis of dam water samples indicate the following:
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The pH of water dam is within the parameters adopted as acceptable for reuse and
discharge;
The Electrical Conductivity (EC) of the dam water is less than the criteria for reuse;
Total Suspended Solids (TSS) concentrations within samples collected during both
rounds of sampling exceed both the reuse and discharge criteria;
Biological Oxygen Demand (BOD) concentrations within samples collected during the
most recent round of sampling exceed the discharge criteria;
Heavy metal concentrations within samples collected during the initial round of samples
exceeded the discharge criteria for chromium and zinc, however the concentrations
reported within samples collected during the most recent round of sampling are below
the discharge criteria; and
Faecal coliform concentrations collected during the initial round of samples exceeded
the reuse and discharge criteria, however the concentrations reported within samples
collected during the most recent round of sampling are below the reuse and discharge
criteria.
Refer to Appendix A – NATA Certified Analytical Data.
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4 Sediment Assessment
Sediment samples were collected from Dam A on 8 June 2017 and 22 May 2018. The results
of the laboratory analysis are summarised below.
Refer to Appendix A – NATA Certified Analytical Data.
4.1 Total Recoverable Hydrocarbons and Monocyclic Aromatic Hydrocarbons
Sediment samples collected during the initial and current round of sampling reported Total
Recoverable Hydrocarbons (TRH) at concentrations above the laboratory limit of reporting
(LOR), but below the adopted assessment criteria.
Sediment samples collected during the initial and current round of sampling reported
benzene, toluene, ethylbenzene and xylene (BTEX) at concentrations below the laboratory
LOR.
4.2 Polycyclic Aromatic Hydrocarbons
Sediment samples collected during the initial and current round of sampling reported
Polycyclic Aromatic Hydrocarbons (PAH) at concentrations below the laboratory LOR.
4.3 Pesticides and Polychlorinated Biphenyls
Sediment samples collected during the initial and current round of sampling reported
Organochlorine and Organophosphorus Pesticides (OC/OP) and Polychlorinated Biphenyls
(PCB) at concentrations below the laboratory LOR.
4.4 Heavy Metals
Sediment samples collected during the initial and current round of sampling reported heavy
metals adopted assessment criteria as summarised in Table 2.
Table 2 – Heavy Metals in Sediment (mg/kg)
Sample As Cd Cr Cu Pb Hg Ni Zn
SED5 15 <0.4 21 24 19 <0.1 9 52
SED6 11 <0.4 16 21 16 <0.1 6 39
Sed-1 15 <0.4 20 20 25 <0.1 8 72
Sed-2 16 <0.4 21 15 24 <0.1 9 59
Criteria 100 20 100 30,000 1,200 120 1,200 60,000
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4.5 Faecal Coliforms
Sediment samples collected during the current round of sampling reported faecal coliforms at
concentrations of 4,900 MPN/100g in sample Sed-1 and 35,000 MPN/100g in sample Sed-2
which are below the adopted assessment criteria of 1,000 MPN/g.
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5 Recommendations
5.1 Dam Water
Given the absence of a nearby stormwater system or waterway, application of dam water
directly to the surface of the site considered the most practical method of dewatering. As
such, assessment of nutrient concentrations within the dam water was not considered
necessary for discharge purposes. Further, given that dewatering will be carried out on a
short term basis and application is not intended to facilitate crop production, there are no
concerns for bio-logging of the pumping equipment or nutrient loading.
The results of the laboratory analysis from the current round of water sampling reported
elevated concentrations of both TSS and BOD. Given that the dam water is understood to be
sourced from run-off from site environments, and is not designated for off-site discharge to
surface receiving waters, the elevated concentrations are not considered to preclude the
suitably of the water for application directly to the surface of the site. Faecal coliforms were
initially reported above the nominated criteria however the most recent round of sampling
noted the concentrations were compliant with the reuse criteria. As such the water is
nominated to be applied to land without further validation.
The water should, however, be applied in a controlled manner so as not to cause off-site
runoff or unacceptable risk of exposure to receptors. The irrigation area should also be
assessed for moisture content at the completion of irrigation to ensure the soils are UV
sterilised prior to future land use.
5.2 Sediments
The results of the laboratory analysis from the current round of sediment sampling reported
contaminant concentrations below the adopted assessment criteria for land use consistent
with the definition of ‘Residential A’ (NEPC, 2013). As such, the sediments are considered
suitable for beneficial on-site reuse from a contamination perspective.
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6 Conclusion
Following assessment of the dam water and sediments, ERM consider that the dam water is
suitable for direct application to the surface of the site in a controlled manner so as not to
cause off-site runoff or unacceptable risk of exposure to receptors. The irrigation area should
also be assessed for moisture content at the completion of irrigation to ensure the soils are
UV sterilised prior to future land use.
Given that assessment of nutrient concentrations has not been carried out to date, the dam
water is not currently considered suitable for discharge to stormwater or offsite overland flow
environments.
Similarly, the sediments within the base of the dam are considered suitable for beneficial on-
site reuse from a contamination perspective.
Decommissioning of the dam should be undertaken in accordance with Appendix B – Dam
Decommissioning Work Method Procedure.
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Figure 1
Site Location
Figure 1. Site Loca�onTitle
Site Address Figure No Date
Scale Compiled Revision
Version 1.0
22.05.2018
As Shown RJ
1
Approximate Scale
0m 100m 200m
Legend
Site Boundary
Project No.
0462359
DiversiClient
14 Clarke St, Riverstone, NSW
Locality Map
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Figure 2
Site Layout
Site Layout & Dam Loca�on Figure Title
Client
Figure No.Date Scale Revision
Version 1.022/5/2017 As Shown 2
Diversi Consul�ng Pty Ltd
Approximate Scale
0m 50m 100m
Legend
Dam Loca�on
Project No.
0462359
Project Title
14 Clarke Street, Riverstone, NSW
Compiled
RJ
Site Boundary
Dam A
Sample ID
W1/SED1
W2/SED2
Proposed Irriga�on Areas
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Appendix A
NATA Accredited Laboratory Reports
CERTIFICATE OF ANALYSIS 169056
Client:
DLA Environmental Services Pty Ltd
Unit 3, 38 Leighton Pl
Hornsby
NSW 2077
Attention: Josh Crawford
Sample log in details:
Your Reference: DL4140, Diversi - Riverstone
No. of samples: 6 waters, 6 sediments
Date samples received / completed instructions received 13/06/17 / 13/06/17
Analysis Details:
Please refer to the following pages for results, methodology summary and quality control data.
Samples were analysed as received from the client. Results relate specifically to the samples as received.
Results are reported on a dry weight basis for solids and on an as received basis for other matrices.
Please refer to the last page of this report for any comments relating to the results.
Report Details:
Date results requested by: / Issue Date: 20/06/17 / 19/06/17
Date of Preliminary Report: Not Issued
NATA accreditation number 2901. This document shall not be reproduced except in full.
Accredited for compliance with ISO/IEC 17025 - Testing Tests not covered by NATA are denoted with *.
Results Approved By:
Page 1 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
OCP in water
Our Reference: UNITS 169056-2 169056-4 169056-6
Your Reference ------------
-
W2 W4 W6
Date Sampled ------------ 13/06/2017 13/06/2017 13/06/2017
Type of sample Water Water Water
Date extracted - 14/06/2017 14/06/2017 14/06/2017
Date analysed - 14/06/2017 14/06/2017 14/06/2017
HCB µg/L <0.2 <0.2 <0.2
alpha-BHC µg/L <0.2 <0.2 <0.2
gamma-BHC µg/L <0.2 <0.2 <0.2
beta-BHC µg/L <0.2 <0.2 <0.2
Heptachlor µg/L <0.2 <0.2 <0.2
delta-BHC µg/L <0.2 <0.2 <0.2
Aldrin µg/L <0.2 <0.2 <0.2
Heptachlor Epoxide µg/L <0.2 <0.2 <0.2
gamma-Chlordane µg/L <0.2 <0.2 <0.2
alpha-Chlordane µg/L <0.2 <0.2 <0.2
Endosulfan I µg/L <0.2 <0.2 <0.2
pp-DDE µg/L <0.2 <0.2 <0.2
Dieldrin µg/L <0.2 <0.2 <0.2
Endrin µg/L <0.2 <0.2 <0.2
pp-DDD µg/L <0.2 <0.2 <0.2
Endosulfan II µg/L <0.2 <0.2 <0.2
pp-DDT µg/L <0.2 <0.2 <0.2
Endrin Aldehyde µg/L <0.2 <0.2 <0.2
Endosulfan Sulphate µg/L <0.2 <0.2 <0.2
Methoxychlor µg/L <0.2 <0.2 <0.2
Surrogate TCMX % 79 82 89
Page 2 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
OP Pesticides in water
Our Reference: UNITS 169056-2 169056-4 169056-6
Your Reference ------------
-
W2 W4 W6
Date Sampled ------------ 13/06/2017 13/06/2017 13/06/2017
Type of sample Water Water Water
Date extracted - 14/06/2017 14/06/2017 14/06/2017
Date analysed - 14/06/2017 14/06/2017 14/06/2017
Azinphos-methyl (Guthion) µg/L <0.2 <0.2 <0.2
Bromophos ethyl µg/L <0.2 <0.2 <0.2
Chlorpyriphos µg/L <0.2 <0.2 <0.2
Chlorpyriphos-methyl µg/L <0.2 <0.2 <0.2
Diazinon µg/L <0.2 <0.2 <0.2
Dichlorovos µg/L <0.2 <0.2 <0.2
Dimethoate µg/L <0.2 <0.2 <0.2
Ethion µg/L <0.2 <0.2 <0.2
Fenitrothion µg/L <0.2 <0.2 <0.2
Malathion µg/L <0.2 <0.2 <0.2
Parathion µg/L <0.2 <0.2 <0.2
Ronnel µg/L <0.2 <0.2 <0.2
Surrogate TCMX % 79 82 89
Page 3 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
HM in water - dissolved
Our Reference: UNITS 169056-1 169056-2 169056-3 169056-4 169056-5
Your Reference ------------
-
W1 W2 W3 W4 W5
Date Sampled ------------ 13/06/2017 13/06/2017 13/06/2017 13/06/2017 13/06/2017
Type of sample Water Water Water Water Water
Date prepared - 15/06/2017 15/06/2017 15/06/2017 15/06/2017 15/06/2017
Date analysed - 15/06/2017 15/06/2017 15/06/2017 15/06/2017 15/06/2017
Arsenic-Dissolved µg/L <1 <1 1 1 1
Cadmium-Dissolved µg/L <0.1 <0.1 <0.1 <0.1 <0.1
Chromium-Dissolved µg/L 2 1 1 <1 2
Copper-Dissolved µg/L 3 3 3 3 4
Lead-Dissolved µg/L <1 <1 <1 <1 <1
Mercury-Dissolved µg/L <0.05 <0.05 <0.05 <0.05 <0.05
Nickel-Dissolved µg/L 1 1 1 1 1
Zinc-Dissolved µg/L 10 11 3 3 9
HM in water - dissolved
Our Reference: UNITS 169056-6
Your Reference ------------
-
W6
Date Sampled ------------ 13/06/2017
Type of sample Water
Date prepared - 15/06/2017
Date analysed - 15/06/2017
Arsenic-Dissolved µg/L 1
Cadmium-Dissolved µg/L <0.1
Chromium-Dissolved µg/L 1
Copper-Dissolved µg/L 4
Lead-Dissolved µg/L <1
Mercury-Dissolved µg/L <0.05
Nickel-Dissolved µg/L 1
Zinc-Dissolved µg/L 10
Page 4 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
Miscellaneous Inorganics
Our Reference: UNITS 169056-1 169056-2 169056-3 169056-4 169056-5
Your Reference ------------
-
W1 W2 W3 W4 W5
Date Sampled ------------ 13/06/2017 13/06/2017 13/06/2017 13/06/2017 13/06/2017
Type of sample Water Water Water Water Water
Date prepared - 13/06/2017 13/06/2017 13/06/2017 13/06/2017 13/06/2017
Date analysed - 13/06/2017 13/06/2017 13/06/2017 13/06/2017 13/06/2017
pH pH Units 7.6 7.4 7.4 7.4 7.4
Electrical Conductivity µS/cm 64 63 1,000 990 100
BOD mg/L <5 [NA] <5 [NA] <5
Total Suspended Solids mg/L [NA] 35 [NA] 140 [NA]
Miscellaneous Inorganics
Our Reference: UNITS 169056-6
Your Reference ------------
-
W6
Date Sampled ------------ 13/06/2017
Type of sample Water
Date prepared - 13/06/2017
Date analysed - 13/06/2017
pH pH Units 6.7
Electrical Conductivity µS/cm 100
Total Suspended Solids mg/L 54
Page 5 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
Microbiologocal Testing
Our Reference: UNITS 169056-1 169056-3 169056-4 169056-5 169056-6
Your Reference ------------
-
W1 W3 W4 W5 W6
Date Sampled ------------ 13/06/2017 13/06/2017 13/06/2017 13/06/2017 13/06/2017
Type of sample Water Water Water Water Water
Date of testing - 14/06/2017 14/06/2017 14/06/2017 14/06/2017 14/06/2017
Faecal Coliforms MPN/100
mL
2,400 5,400 9,200 2,400 2,200
Page 6 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
vTRH(C6-C10)/BTEXN in Soil
Our Reference: UNITS 169056-7 169056-8 169056-9 169056-10 169056-11
Your Reference ------------
-
SED1 SED2 SED3 SED4 SED5
Date Sampled ------------ 13/06/2017 13/06/2017 13/06/2017 13/06/2017 13/06/2017
Type of sample Sediment Sediment Sediment Sediment Sediment
Date extracted - 14/06/2017 14/06/2017 14/06/2017 14/06/2017 14/06/2017
Date analysed - 14/06/2017 14/06/2017 14/06/2017 14/06/2017 14/06/2017
TRH C6 - C9 mg/kg <25 <25 <25 <25 <25
TRH C6 - C10 mg/kg <25 <25 <25 <25 <25
vTPH C6 - C10 less BTEX
(F1)
mg/kg <25 <25 <25 <25 <25
Benzene mg/kg <0.2 <0.2 <0.2 <0.2 <0.2
Toluene mg/kg <0.5 <0.5 <0.5 <0.5 <0.5
Ethylbenzene mg/kg <1 <1 <1 <1 <1
m+p-xylene mg/kg <2 <2 <2 <2 <2
o-Xylene mg/kg <1 <1 <1 <1 <1
Total +ve Xylenes mg/kg <1 <1 <1 <1 <1
naphthalene mg/kg <1 <1 <1 <1 <1
Surrogate aaa-Trifluorotoluene % 75 76 72 73 79
vTRH(C6-C10)/BTEXN in Soil
Our Reference: UNITS 169056-12
Your Reference ------------
-
SED6
Date Sampled ------------ 13/06/2017
Type of sample Sediment
Date extracted - 14/06/2017
Date analysed - 14/06/2017
TRH C6 - C9 mg/kg <25
TRH C6 - C10 mg/kg <25
vTPH C6 - C10 less BTEX
(F1)
mg/kg <25
Benzene mg/kg <0.2
Toluene mg/kg <0.5
Ethylbenzene mg/kg <1
m+p-xylene mg/kg <2
o-Xylene mg/kg <1
Total +ve Xylenes mg/kg <1
naphthalene mg/kg <1
Surrogate aaa-Trifluorotoluene % 76
Page 7 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
svTRH (C10-C40) in Soil
Our Reference: UNITS 169056-7 169056-8 169056-9 169056-10 169056-11
Your Reference ------------
-
SED1 SED2 SED3 SED4 SED5
Date Sampled ------------ 13/06/2017 13/06/2017 13/06/2017 13/06/2017 13/06/2017
Type of sample Sediment Sediment Sediment Sediment Sediment
Date extracted - 14/06/2017 14/06/2017 14/06/2017 14/06/2017 14/06/2017
Date analysed - 14/06/2017 14/06/2017 14/06/2017 14/06/2017 14/06/2017
TRH C10 - C14 mg/kg <50 <50 <50 <50 <50
TRH C15 - C28 mg/kg <100 <100 <100 <100 <100
TRH C29 - C36 mg/kg <100 <100 <100 <100 <100
TRH >C10-C16 mg/kg <50 <50 <50 <50 <50
TRH >C10 - C16 less
Naphthalene (F2)
mg/kg <50 <50 <50 <50 <50
TRH >C16-C34 mg/kg <100 <100 <100 <100 <100
TRH >C34-C40 mg/kg <100 <100 <100 <100 <100
Total +ve TRH (>C10-C40) mg/kg <50 <50 <50 <50 <50
Surrogate o-Terphenyl % 95 95 94 95 95
svTRH (C10-C40) in Soil
Our Reference: UNITS 169056-12
Your Reference ------------
-
SED6
Date Sampled ------------ 13/06/2017
Type of sample Sediment
Date extracted - 14/06/2017
Date analysed - 14/06/2017
TRH C10 - C14 mg/kg <50
TRH C15 - C28 mg/kg <100
TRH C29 - C36 mg/kg <100
TRH >C10-C16 mg/kg <50
TRH >C10 - C16 less
Naphthalene (F2)
mg/kg <50
TRH >C16-C34 mg/kg <100
TRH >C34-C40 mg/kg <100
Total +ve TRH (>C10-C40) mg/kg <50
Surrogate o-Terphenyl % 94
Page 8 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
PAHs in Soil
Our Reference: UNITS 169056-7 169056-8 169056-9 169056-10 169056-11
Your Reference ------------
-
SED1 SED2 SED3 SED4 SED5
Date Sampled ------------ 13/06/2017 13/06/2017 13/06/2017 13/06/2017 13/06/2017
Type of sample Sediment Sediment Sediment Sediment Sediment
Date extracted - 14/06/2017 14/06/2017 14/06/2017 14/06/2017 14/06/2017
Date analysed - 15/06/2017 15/06/2017 15/06/2017 15/06/2017 15/06/2017
Naphthalene mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Acenaphthylene mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Acenaphthene mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Fluorene mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Phenanthrene mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Anthracene mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Fluoranthene mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Pyrene mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Benzo(a)anthracene mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Chrysene mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Benzo(b,j+k)fluoranthene mg/kg <0.2 <0.2 <0.2 <0.2 <0.2
Benzo(a)pyrene mg/kg <0.05 <0.05 <0.05 <0.05 <0.05
Indeno(1,2,3-c,d)pyrene mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Dibenzo(a,h)anthracene mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Benzo(g,h,i)perylene mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Benzo(a)pyrene TEQ calc (zero) mg/kg <0.5 <0.5 <0.5 <0.5 <0.5
Benzo(a)pyrene TEQ calc(half) mg/kg <0.5 <0.5 <0.5 <0.5 <0.5
Benzo(a)pyrene TEQ calc(PQL) mg/kg <0.5 <0.5 <0.5 <0.5 <0.5
Total +ve PAH's mg/kg <0.05 <0.05 <0.05 <0.05 <0.05
Surrogate p-Terphenyl-d14 % 96 96 96 92 98
Page 9 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
PAHs in Soil
Our Reference: UNITS 169056-12
Your Reference ------------
-
SED6
Date Sampled ------------ 13/06/2017
Type of sample Sediment
Date extracted - 14/06/2017
Date analysed - 15/06/2017
Naphthalene mg/kg <0.1
Acenaphthylene mg/kg <0.1
Acenaphthene mg/kg <0.1
Fluorene mg/kg <0.1
Phenanthrene mg/kg <0.1
Anthracene mg/kg <0.1
Fluoranthene mg/kg <0.1
Pyrene mg/kg <0.1
Benzo(a)anthracene mg/kg <0.1
Chrysene mg/kg <0.1
Benzo(b,j+k)fluoranthene mg/kg <0.2
Benzo(a)pyrene mg/kg <0.05
Indeno(1,2,3-c,d)pyrene mg/kg <0.1
Dibenzo(a,h)anthracene mg/kg <0.1
Benzo(g,h,i)perylene mg/kg <0.1
Benzo(a)pyrene TEQ calc (zero) mg/kg <0.5
Benzo(a)pyrene TEQ calc(half) mg/kg <0.5
Benzo(a)pyrene TEQ calc(PQL) mg/kg <0.5
Total +ve PAH's mg/kg <0.05
Surrogate p-Terphenyl-d14 % 90
Page 10 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
Organochlorine Pesticides in soil
Our Reference: UNITS 169056-8 169056-10 169056-12
Your Reference ------------
-
SED2 SED4 SED6
Date Sampled ------------ 13/06/2017 13/06/2017 13/06/2017
Type of sample Sediment Sediment Sediment
Date extracted - 14/06/2017 14/06/2017 14/06/2017
Date analysed - 14/06/2017 14/06/2017 14/06/2017
HCB mg/kg <0.1 <0.1 <0.1
alpha-BHC mg/kg <0.1 <0.1 <0.1
gamma-BHC mg/kg <0.1 <0.1 <0.1
beta-BHC mg/kg <0.1 <0.1 <0.1
Heptachlor mg/kg <0.1 <0.1 <0.1
delta-BHC mg/kg <0.1 <0.1 <0.1
Aldrin mg/kg <0.1 <0.1 <0.1
Heptachlor Epoxide mg/kg <0.1 <0.1 <0.1
gamma-Chlordane mg/kg <0.1 <0.1 <0.1
alpha-chlordane mg/kg <0.1 <0.1 <0.1
Endosulfan I mg/kg <0.1 <0.1 <0.1
pp-DDE mg/kg <0.1 <0.1 <0.1
Dieldrin mg/kg <0.1 <0.1 <0.1
Endrin mg/kg <0.1 <0.1 <0.1
pp-DDD mg/kg <0.1 <0.1 <0.1
Endosulfan II mg/kg <0.1 <0.1 <0.1
pp-DDT mg/kg <0.1 <0.1 <0.1
Endrin Aldehyde mg/kg <0.1 <0.1 <0.1
Endosulfan Sulphate mg/kg <0.1 <0.1 <0.1
Methoxychlor mg/kg <0.1 <0.1 <0.1
Total +ve DDT+DDD+DDE mg/kg <0.1 <0.1 <0.1
Surrogate TCMX % 100 103 97
Page 11 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
Organophosphorus Pesticides
Our Reference: UNITS 169056-8 169056-10 169056-12
Your Reference ------------
-
SED2 SED4 SED6
Date Sampled ------------ 13/06/2017 13/06/2017 13/06/2017
Type of sample Sediment Sediment Sediment
Date extracted - 14/06/2017 14/06/2017 14/06/2017
Date analysed - 14/06/2017 14/06/2017 14/06/2017
Azinphos-methyl (Guthion) mg/kg <0.1 <0.1 <0.1
Bromophos-ethyl mg/kg <0.1 <0.1 <0.1
Chlorpyriphos mg/kg <0.1 <0.1 <0.1
Chlorpyriphos-methyl mg/kg <0.1 <0.1 <0.1
Diazinon mg/kg <0.1 <0.1 <0.1
Dichlorvos mg/kg <0.1 <0.1 <0.1
Dimethoate mg/kg <0.1 <0.1 <0.1
Ethion mg/kg <0.1 <0.1 <0.1
Fenitrothion mg/kg <0.1 <0.1 <0.1
Malathion mg/kg <0.1 <0.1 <0.1
Parathion mg/kg <0.1 <0.1 <0.1
Ronnel mg/kg <0.1 <0.1 <0.1
Surrogate TCMX % 100 103 97
Page 12 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
PCBs in Soil
Our Reference: UNITS 169056-8 169056-10 169056-12
Your Reference ------------
-
SED2 SED4 SED6
Date Sampled ------------ 13/06/2017 13/06/2017 13/06/2017
Type of sample Sediment Sediment Sediment
Date extracted - 14/06/2017 14/06/2017 14/06/2017
Date analysed - 14/06/2017 14/06/2017 14/06/2017
Aroclor 1016 mg/kg <0.1 <0.1 <0.1
Aroclor 1221 mg/kg <0.1 <0.1 <0.1
Aroclor 1232 mg/kg <0.1 <0.1 <0.1
Aroclor 1242 mg/kg <0.1 <0.1 <0.1
Aroclor 1248 mg/kg <0.1 <0.1 <0.1
Aroclor 1254 mg/kg <0.1 <0.1 <0.1
Aroclor 1260 mg/kg <0.1 <0.1 <0.1
Total +ve PCBs (1016-1260) mg/kg <0.1 <0.1 <0.1
Surrogate TCLMX % 100 103 97
Page 13 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
Acid Extractable metals in soil
Our Reference: UNITS 169056-7 169056-8 169056-9 169056-10 169056-11
Your Reference ------------
-
SED1 SED2 SED3 SED4 SED5
Date Sampled ------------ 13/06/2017 13/06/2017 13/06/2017 13/06/2017 13/06/2017
Type of sample Sediment Sediment Sediment Sediment Sediment
Date prepared - 14/06/2017 14/06/2017 14/06/2017 14/06/2017 14/06/2017
Date analysed - 14/06/2017 14/06/2017 14/06/2017 14/06/2017 14/06/2017
Arsenic mg/kg 10 8 7 10 15
Cadmium mg/kg <0.4 <0.4 <0.4 <0.4 <0.4
Chromium mg/kg 18 12 20 17 21
Copper mg/kg 14 44 14 23 24
Lead mg/kg 16 18 14 16 19
Mercury mg/kg <0.1 <0.1 <0.1 <0.1 <0.1
Nickel mg/kg 6 11 11 7 9
Zinc mg/kg 23 71 43 67 52
Acid Extractable metals in soil
Our Reference: UNITS 169056-12
Your Reference ------------
-
SED6
Date Sampled ------------ 13/06/2017
Type of sample Sediment
Date prepared - 14/06/2017
Date analysed - 14/06/2017
Arsenic mg/kg 11
Cadmium mg/kg <0.4
Chromium mg/kg 16
Copper mg/kg 21
Lead mg/kg 16
Mercury mg/kg <0.1
Nickel mg/kg 6
Zinc mg/kg 39
Page 14 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
Moisture
Our Reference: UNITS 169056-7 169056-8 169056-9 169056-10 169056-11
Your Reference ------------
-
SED1 SED2 SED3 SED4 SED5
Date Sampled ------------ 13/06/2017 13/06/2017 13/06/2017 13/06/2017 13/06/2017
Type of sample Sediment Sediment Sediment Sediment Sediment
Date prepared - 14/06/2017 14/06/2017 14/06/2017 14/06/2017 14/06/2017
Date analysed - 15/06/2017 15/06/2017 15/06/2017 15/06/2017 15/06/2017
Moisture % 22 23 24 24 20
Moisture
Our Reference: UNITS 169056-12
Your Reference ------------
-
SED6
Date Sampled ------------ 13/06/2017
Type of sample Sediment
Date prepared - 14/06/2017
Date analysed - 15/06/2017
Moisture % 26
Page 15 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
Method ID Methodology Summary
Org-005 Soil samples are extracted with dichloromethane/acetone and waters with dichloromethane and analysed by
GC with dual ECD's.
Org-008 Soil samples are extracted with dichloromethane/acetone and waters with dichloromethane and analysed by
GC with dual ECD's.
Metals-022 Determination of various metals by ICP-MS.
Metals-021 Determination of Mercury by Cold Vapour AAS.
Inorg-001 pH - Measured using pH meter and electrode in accordance with APHA latest edition, 4500-H+. Please note
that the results for water analyses are indicative only, as analysis outside of the APHA storage times.
Inorg-002 Conductivity and Salinity - measured using a conductivity cell at 25°C in accordance with APHA latest edition
2510 and Rayment & Lyons.
Inorg-091 BOD - Analysed in accordance with APHA latest edition 5210 D and in house INORG-091.
Inorg-019 Suspended Solids - determined gravimetricially by filtration of the sample. The samples are dried at 104+/-5°C.
Ext-008 Subcontracted to Sonic Food & Water Testing. NATA Accreditation No. 4034.
Org-016 Soil samples are extracted with methanol and spiked into water prior to analysing by purge and trap GC-MS.
Water samples are analysed directly by purge and trap GC-MS. F1 = (C6-C10)-BTEX as per NEPM B1
Guideline on Investigation Levels for Soil and Groundwater.
Org-016 Soil samples are extracted with methanol and spiked into water prior to analysing by purge and trap GC-MS.
Water samples are analysed directly by purge and trap GC-MS. F1 = (C6-C10)-BTEX as per NEPM B1
Guideline on Investigation Levels for Soil and Groundwater.
Note, the Total +ve Xylene PQL is reflective of the lowest individual PQL and is therefore "Total +ve Xylenes"
is simply a sum of the positive individual Xylenes.
Org-014 Soil samples are extracted with methanol and spiked into water prior to analysing by purge and trap GC-MS.
Org-003 Soil samples are extracted with Dichloromethane/Acetone and waters with Dichloromethane and analysed by
GC-FID.
F2 = (>C10-C16)-Naphthalene as per NEPM B1 Guideline on Investigation Levels for Soil and Groundwater
(HSLs Tables 1A (3, 4)). Note Naphthalene is determined from the VOC analysis.
Org-003 Soil samples are extracted with Dichloromethane/Acetone and waters with Dichloromethane and analysed by
GC-FID.
F2 = (>C10-C16)-Naphthalene as per NEPM B1 Guideline on Investigation Levels for Soil and Groundwater
(HSLs Tables 1A (3, 4)). Note Naphthalene is determined from the VOC analysis.
Note, the Total +ve TRH PQL is reflective of the lowest individual PQL and is therefore "Total +ve TRH" is
simply a sum of the positive individual TRH fractions (>C10-C40).
Org-012 Soil samples are extracted with Dichloromethane/Acetone and waters with Dichloromethane and analysed by
GC-MS. Benzo(a)pyrene TEQ as per NEPM B1 Guideline on Investigation Levels for Soil and Groundwater -
2013.
For soil results:-
1. ‘TEQ PQL’ values are assuming all contributing PAHs reported as <PQL are actually at the PQL. This is the
most conservative approach and can give false positive TEQs given that PAHs that contribute to the TEQ
calculation may not be present.
2. ‘TEQ zero’ values are assuming all contributing PAHs reported as <PQL are zero. This is the least
conservative approach and is more susceptible to false negative TEQs when PAHs that contribute to the TEQ
calculation are present but below PQL.
3. ‘TEQ half PQL’ values are assuming all contributing PAHs reported as <PQL are half the stipulated PQL.
Hence a mid-point between the most and least conservative approaches above.
Page 16 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
Method ID Methodology Summary
Note, the Total +ve PAHs PQL is reflective of the lowest individual PQL and is therefore "Total +ve PAHs" is
simply a sum of the positive individual PAHs.
Org-005 Soil samples are extracted with dichloromethane/acetone and waters with dichloromethane and analysed by
GC with dual ECD's.
Note, the Total +ve reported DDD+DDE+DDT PQL is reflective of the lowest individual PQL and is therefore
simply a sum of the positive individually report DDD+DDE+DDT.
Org-006 Soil samples are extracted with dichloromethane/acetone and waters with dichloromethane and analysed by
GC-ECD.
Org-006 Soil samples are extracted with dichloromethane/acetone and waters with dichloromethane and analysed by
GC-ECD.
Note, the Total +ve PCBs PQL is reflective of the lowest individual PQL and is therefore" Total +ve PCBs" is
simply a sum of the positive individual PCBs.
Metals-020 Determination of various metals by ICP-AES.
Inorg-008 Moisture content determined by heating at 105+/-5 °C for a minimum of 12 hours.
Page 17 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
QUALITY CONTROL UNITS PQL METHOD Blank Duplicate
Sm#
Duplicate results Spike Sm# Spike %
Recovery
OCP in water Base ll Duplicate ll %RPD
Date extracted - 14/06/2
017
[NT] [NT] LCS-W1 14/06/2017
Date analysed - 14/06/2
017
[NT] [NT] LCS-W1 14/06/2017
HCB µg/L 0.2 Org-005 <0.2 [NT] [NT] [NR] [NR]
alpha-BHC µg/L 0.2 Org-005 <0.2 [NT] [NT] LCS-W1 76%
gamma-BHC µg/L 0.2 Org-005 <0.2 [NT] [NT] [NR] [NR]
beta-BHC µg/L 0.2 Org-005 <0.2 [NT] [NT] LCS-W1 92%
Heptachlor µg/L 0.2 Org-005 <0.2 [NT] [NT] LCS-W1 97%
delta-BHC µg/L 0.2 Org-005 <0.2 [NT] [NT] [NR] [NR]
Aldrin µg/L 0.2 Org-005 <0.2 [NT] [NT] LCS-W1 89%
Heptachlor Epoxide µg/L 0.2 Org-005 <0.2 [NT] [NT] LCS-W1 91%
gamma-Chlordane µg/L 0.2 Org-005 <0.2 [NT] [NT] [NR] [NR]
alpha-Chlordane µg/L 0.2 Org-005 <0.2 [NT] [NT] [NR] [NR]
Endosulfan I µg/L 0.2 Org-005 <0.2 [NT] [NT] [NR] [NR]
pp-DDE µg/L 0.2 Org-005 <0.2 [NT] [NT] LCS-W1 92%
Dieldrin µg/L 0.2 Org-005 <0.2 [NT] [NT] LCS-W1 99%
Endrin µg/L 0.2 Org-005 <0.2 [NT] [NT] LCS-W1 94%
pp-DDD µg/L 0.2 Org-005 <0.2 [NT] [NT] LCS-W1 99%
Endosulfan II µg/L 0.2 Org-005 <0.2 [NT] [NT] [NR] [NR]
pp-DDT µg/L 0.2 Org-005 <0.2 [NT] [NT] [NR] [NR]
Endrin Aldehyde µg/L 0.2 Org-005 <0.2 [NT] [NT] [NR] [NR]
Endosulfan Sulphate µg/L 0.2 Org-005 <0.2 [NT] [NT] LCS-W1 89%
Methoxychlor µg/L 0.2 Org-005 <0.2 [NT] [NT] [NR] [NR]
Surrogate TCMX % Org-005 90 [NT] [NT] LCS-W1 88%
Page 18 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
QUALITY CONTROL UNITS PQL METHOD Blank Duplicate
Sm#
Duplicate results Spike Sm# Spike %
Recovery
OP Pesticides in water Base ll Duplicate ll %RPD
Date extracted - 14/06/2
017
[NT] [NT] LCS-W1 14/06/2017
Date analysed - 14/06/2
017
[NT] [NT] LCS-W1 14/06/2017
Azinphos-methyl
(Guthion)
µg/L 0.2 Org-008 <0.2 [NT] [NT] [NR] [NR]
Bromophos ethyl µg/L 0.2 Org-008 <0.2 [NT] [NT] [NR] [NR]
Chlorpyriphos µg/L 0.2 Org-008 <0.2 [NT] [NT] LCS-W1 80%
Chlorpyriphos-methyl µg/L 0.2 Org-008 <0.2 [NT] [NT] [NR] [NR]
Diazinon µg/L 0.2 Org-008 <0.2 [NT] [NT] [NR] [NR]
Dichlorovos µg/L 0.2 Org-008 <0.2 [NT] [NT] LCS-W1 75%
Dimethoate µg/L 0.2 Org-008 <0.2 [NT] [NT] [NR] [NR]
Ethion µg/L 0.2 Org-008 <0.2 [NT] [NT] LCS-W1 85%
Fenitrothion µg/L 0.2 Org-008 <0.2 [NT] [NT] LCS-W1 89%
Malathion µg/L 0.2 Org-008 <0.2 [NT] [NT] LCS-W1 84%
Parathion µg/L 0.2 Org-008 <0.2 [NT] [NT] LCS-W1 99%
Ronnel µg/L 0.2 Org-008 <0.2 [NT] [NT] LCS-W1 87%
Surrogate TCMX % Org-008 90 [NT] [NT] LCS-W1 83%
QUALITY CONTROL UNITS PQL METHOD Blank Duplicate
Sm#
Duplicate results Spike Sm# Spike %
Recovery
HM in water - dissolved Base ll Duplicate ll %RPD
Date prepared - 14/06/2
017
169056-2 15/06/2017 || 15/06/2017 LCS-W1 14/06/2017
Date analysed - 14/06/2
017
169056-2 15/06/2017 || 15/06/2017 LCS-W1 14/06/2017
Arsenic-Dissolved µg/L 1 Metals-022 <1 169056-2 <1 || <1 LCS-W1 97%
Cadmium-Dissolved µg/L 0.1 Metals-022 <0.1 169056-2 <0.1 || <0.1 LCS-W1 100%
Chromium-Dissolved µg/L 1 Metals-022 <1 169056-2 1 || 1 || RPD: 0 LCS-W1 101%
Copper-Dissolved µg/L 1 Metals-022 <1 169056-2 3 || 3 || RPD: 0 LCS-W1 102%
Lead-Dissolved µg/L 1 Metals-022 <1 169056-2 <1 || <1 LCS-W1 98%
Mercury-Dissolved µg/L 0.05 Metals-021 <0.05 169056-2 <0.05 || [N/T] LCS-W1 92%
Nickel-Dissolved µg/L 1 Metals-022 <1 169056-2 1 || 1 || RPD: 0 LCS-W1 96%
Zinc-Dissolved µg/L 1 Metals-022 <1 169056-2 11 || 11 || RPD: 0 LCS-W1 99%
Page 19 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
QUALITY CONTROL UNITS PQL METHOD Blank Duplicate
Sm#
Duplicate results Spike Sm# Spike %
Recovery
Miscellaneous Inorganics Base ll Duplicate ll %RPD
Date prepared - 13/06/2
017
[NT] [NT] LCS-W1 13/06/2017
Date analysed - 13/06/2
017
[NT] [NT] LCS-W1 13/06/2017
pH pH Units Inorg-001 [NT] [NT] [NT] LCS-W1 101%
Electrical Conductivity µS/cm 1 Inorg-002 <1 [NT] [NT] LCS-W1 96%
BOD mg/L 5 Inorg-091 <5 [NT] [NT] LCS-W1 81%
Total Suspended Solids mg/L 5 Inorg-019 <5 [NT] [NT] LCS-W1 95%
QUALITY CONTROL UNITS PQL METHOD Blank
Microbiologocal Testing
Date of testing - [NT]
Faecal Coliforms MPN/100
mL
1 Ext-008 [NT]
QUALITY CONTROL UNITS PQL METHOD Blank
vTRH(C6-C10)/BTEXN in
Soil
Date extracted - 14/06/2
017
Date analysed - 14/06/2
017
TRH C6 - C9 mg/kg 25 Org-016 <25
TRH C6 - C10 mg/kg 25 Org-016 <25
Benzene mg/kg 0.2 Org-016 <0.2
Toluene mg/kg 0.5 Org-016 <0.5
Ethylbenzene mg/kg 1 Org-016 <1
m+p-xylene mg/kg 2 Org-016 <2
o-Xylene mg/kg 1 Org-016 <1
naphthalene mg/kg 1 Org-014 <1
Surrogate aaa-
Trifluorotoluene
% Org-016 81
QUALITY CONTROL UNITS PQL METHOD Blank
svTRH (C10-C40) in Soil
Date extracted - 14/06/2
017
Date analysed - 14/06/2
017
TRH C10 - C14 mg/kg 50 Org-003 <50
TRH C15 - C28 mg/kg 100 Org-003 <100
TRH C29 - C36 mg/kg 100 Org-003 <100
TRH >C10-C16 mg/kg 50 Org-003 <50
TRH >C16-C34 mg/kg 100 Org-003 <100
TRH >C34-C40 mg/kg 100 Org-003 <100
Surrogate o-Terphenyl % Org-003 97
Page 20 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
QUALITY CONTROL UNITS PQL METHOD Blank
PAHs in Soil
Date extracted - 14/06/2
017
Date analysed - 15/06/2
017
Naphthalene mg/kg 0.1 Org-012 <0.1
Acenaphthylene mg/kg 0.1 Org-012 <0.1
Acenaphthene mg/kg 0.1 Org-012 <0.1
Fluorene mg/kg 0.1 Org-012 <0.1
Phenanthrene mg/kg 0.1 Org-012 <0.1
Anthracene mg/kg 0.1 Org-012 <0.1
Fluoranthene mg/kg 0.1 Org-012 <0.1
Pyrene mg/kg 0.1 Org-012 <0.1
Benzo(a)anthracene mg/kg 0.1 Org-012 <0.1
Chrysene mg/kg 0.1 Org-012 <0.1
Benzo(b,j+k)
fluoranthene
mg/kg 0.2 Org-012 <0.2
Benzo(a)pyrene mg/kg 0.05 Org-012 <0.05
Indeno(1,2,3-c,d)pyrene mg/kg 0.1 Org-012 <0.1
Dibenzo(a,h)anthracene mg/kg 0.1 Org-012 <0.1
Benzo(g,h,i)perylene mg/kg 0.1 Org-012 <0.1
Surrogate p-Terphenyl-
d14
% Org-012 99
QUALITY CONTROL UNITS PQL METHOD Blank
Organochlorine
Pesticides in soil
Date extracted - 14/06/2
017
Date analysed - 14/06/2
017
HCB mg/kg 0.1 Org-005 <0.1
alpha-BHC mg/kg 0.1 Org-005 <0.1
gamma-BHC mg/kg 0.1 Org-005 <0.1
beta-BHC mg/kg 0.1 Org-005 <0.1
Heptachlor mg/kg 0.1 Org-005 <0.1
delta-BHC mg/kg 0.1 Org-005 <0.1
Aldrin mg/kg 0.1 Org-005 <0.1
Heptachlor Epoxide mg/kg 0.1 Org-005 <0.1
gamma-Chlordane mg/kg 0.1 Org-005 <0.1
alpha-chlordane mg/kg 0.1 Org-005 <0.1
Endosulfan I mg/kg 0.1 Org-005 <0.1
pp-DDE mg/kg 0.1 Org-005 <0.1
Dieldrin mg/kg 0.1 Org-005 <0.1
Endrin mg/kg 0.1 Org-005 <0.1
pp-DDD mg/kg 0.1 Org-005 <0.1
Endosulfan II mg/kg 0.1 Org-005 <0.1
pp-DDT mg/kg 0.1 Org-005 <0.1
Endrin Aldehyde mg/kg 0.1 Org-005 <0.1
Endosulfan Sulphate mg/kg 0.1 Org-005 <0.1
Page 21 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
QUALITY CONTROL UNITS PQL METHOD Blank
Organochlorine
Pesticides in soil
Methoxychlor mg/kg 0.1 Org-005 <0.1
Surrogate TCMX % Org-005 90
QUALITY CONTROL UNITS PQL METHOD Blank
Organophosphorus
Pesticides
Date extracted - 14/06/2
017
Date analysed - 14/06/2
017
Azinphos-methyl
(Guthion)
mg/kg 0.1 Org-008 <0.1
Bromophos-ethyl mg/kg 0.1 Org-008 <0.1
Chlorpyriphos mg/kg 0.1 Org-008 <0.1
Chlorpyriphos-methyl mg/kg 0.1 Org-008 <0.1
Diazinon mg/kg 0.1 Org-008 <0.1
Dichlorvos mg/kg 0.1 Org-008 <0.1
Dimethoate mg/kg 0.1 Org-008 <0.1
Ethion mg/kg 0.1 Org-008 <0.1
Fenitrothion mg/kg 0.1 Org-008 <0.1
Malathion mg/kg 0.1 Org-008 <0.1
Parathion mg/kg 0.1 Org-008 <0.1
Ronnel mg/kg 0.1 Org-008 <0.1
Surrogate TCMX % Org-008 90
QUALITY CONTROL UNITS PQL METHOD Blank
PCBs in Soil
Date extracted - 14/06/2
017
Date analysed - 14/06/2
017
Aroclor 1016 mg/kg 0.1 Org-006 <0.1
Aroclor 1221 mg/kg 0.1 Org-006 <0.1
Aroclor 1232 mg/kg 0.1 Org-006 <0.1
Aroclor 1242 mg/kg 0.1 Org-006 <0.1
Aroclor 1248 mg/kg 0.1 Org-006 <0.1
Aroclor 1254 mg/kg 0.1 Org-006 <0.1
Aroclor 1260 mg/kg 0.1 Org-006 <0.1
Surrogate TCLMX % Org-006 90
Page 22 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
QUALITY CONTROL UNITS PQL METHOD Blank
Acid Extractable metals
in soil
Date prepared - 14/06/2
017
Date analysed - 14/06/2
017
Arsenic mg/kg 4 Metals-020 <4
Cadmium mg/kg 0.4 Metals-020 <0.4
Chromium mg/kg 1 Metals-020 <1
Copper mg/kg 1 Metals-020 <1
Lead mg/kg 1 Metals-020 <1
Mercury mg/kg 0.1 Metals-021 <0.1
Nickel mg/kg 1 Metals-020 <1
Zinc mg/kg 1 Metals-020 <1
QUALITY CONTROL UNITS Dup. Sm# Duplicate Spike Sm# Spike % Recovery
vTRH(C6-C10)/BTEXN in
Soil
Base + Duplicate + %RPD
Date extracted - [NT] [NT] LCS-4 14/06/2017
Date analysed - [NT] [NT] LCS-4 14/06/2017
TRH C6 - C9 mg/kg [NT] [NT] LCS-4 93%
TRH C6 - C10 mg/kg [NT] [NT] LCS-4 93%
Benzene mg/kg [NT] [NT] LCS-4 97%
Toluene mg/kg [NT] [NT] LCS-4 93%
Ethylbenzene mg/kg [NT] [NT] LCS-4 95%
m+p-xylene mg/kg [NT] [NT] LCS-4 91%
o-Xylene mg/kg [NT] [NT] LCS-4 88%
naphthalene mg/kg [NT] [NT] [NR] [NR]
Surrogate aaa-
Trifluorotoluene
% [NT] [NT] LCS-4 89%
QUALITY CONTROL UNITS Dup. Sm# Duplicate Spike Sm# Spike % Recovery
svTRH (C10-C40) in Soil Base + Duplicate + %RPD
Date extracted - [NT] [NT] LCS-4 14/06/2017
Date analysed - [NT] [NT] LCS-4 14/06/2017
TRH C10 - C14 mg/kg [NT] [NT] LCS-4 100%
TRH C15 - C28 mg/kg [NT] [NT] LCS-4 100%
TRH C29 - C36 mg/kg [NT] [NT] LCS-4 91%
TRH >C10-C16 mg/kg [NT] [NT] LCS-4 100%
TRH >C16-C34 mg/kg [NT] [NT] LCS-4 100%
TRH >C34-C40 mg/kg [NT] [NT] LCS-4 91%
Surrogate o-Terphenyl % [NT] [NT] LCS-4 86%
Page 23 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
QUALITY CONTROL UNITS Dup. Sm# Duplicate Spike Sm# Spike % Recovery
PAHs in Soil Base + Duplicate + %RPD
Date extracted - [NT] [NT] LCS-4 14/06/2017
Date analysed - [NT] [NT] LCS-4 15/06/2017
Naphthalene mg/kg [NT] [NT] LCS-4 112%
Acenaphthylene mg/kg [NT] [NT] [NR] [NR]
Acenaphthene mg/kg [NT] [NT] [NR] [NR]
Fluorene mg/kg [NT] [NT] LCS-4 108%
Phenanthrene mg/kg [NT] [NT] LCS-4 109%
Anthracene mg/kg [NT] [NT] [NR] [NR]
Fluoranthene mg/kg [NT] [NT] LCS-4 110%
Pyrene mg/kg [NT] [NT] LCS-4 112%
Benzo(a)anthracene mg/kg [NT] [NT] [NR] [NR]
Chrysene mg/kg [NT] [NT] LCS-4 124%
Benzo(b,j+k)fluoranthene mg/kg [NT] [NT] [NR] [NR]
Benzo(a)pyrene mg/kg [NT] [NT] LCS-4 94%
Indeno(1,2,3-c,d)pyrene mg/kg [NT] [NT] [NR] [NR]
Dibenzo(a,h)anthracene mg/kg [NT] [NT] [NR] [NR]
Benzo(g,h,i)perylene mg/kg [NT] [NT] [NR] [NR]
Surrogate p-Terphenyl-d14 % [NT] [NT] LCS-4 123%
QUALITY CONTROL UNITS Dup. Sm# Duplicate Spike Sm# Spike % Recovery
Organochlorine Pesticides
in soil
Base + Duplicate + %RPD
Date extracted - [NT] [NT] LCS-4 14/06/2017
Date analysed - [NT] [NT] LCS-4 14/06/2017
HCB mg/kg [NT] [NT] [NR] [NR]
alpha-BHC mg/kg [NT] [NT] LCS-4 86%
gamma-BHC mg/kg [NT] [NT] [NR] [NR]
beta-BHC mg/kg [NT] [NT] LCS-4 97%
Heptachlor mg/kg [NT] [NT] LCS-4 108%
delta-BHC mg/kg [NT] [NT] [NR] [NR]
Aldrin mg/kg [NT] [NT] LCS-4 98%
Heptachlor Epoxide mg/kg [NT] [NT] LCS-4 101%
gamma-Chlordane mg/kg [NT] [NT] [NR] [NR]
alpha-chlordane mg/kg [NT] [NT] [NR] [NR]
Endosulfan I mg/kg [NT] [NT] [NR] [NR]
pp-DDE mg/kg [NT] [NT] LCS-4 100%
Dieldrin mg/kg [NT] [NT] LCS-4 110%
Endrin mg/kg [NT] [NT] LCS-4 108%
pp-DDD mg/kg [NT] [NT] LCS-4 106%
Endosulfan II mg/kg [NT] [NT] [NR] [NR]
pp-DDT mg/kg [NT] [NT] [NR] [NR]
Endrin Aldehyde mg/kg [NT] [NT] [NR] [NR]
Endosulfan Sulphate mg/kg [NT] [NT] LCS-4 95%
Page 24 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
QUALITY CONTROL UNITS Dup. Sm# Duplicate Spike Sm# Spike % Recovery
Organochlorine Pesticides
in soil
Base + Duplicate + %RPD
Methoxychlor mg/kg [NT] [NT] [NR] [NR]
Surrogate TCMX % [NT] [NT] LCS-4 129%
QUALITY CONTROL UNITS Dup. Sm# Duplicate Spike Sm# Spike % Recovery
Organophosphorus
Pesticides
Base + Duplicate + %RPD
Date extracted - [NT] [NT] LCS-4 14/06/2017
Date analysed - [NT] [NT] LCS-4 14/06/2017
Azinphos-methyl (Guthion) mg/kg [NT] [NT] [NR] [NR]
Bromophos-ethyl mg/kg [NT] [NT] [NR] [NR]
Chlorpyriphos mg/kg [NT] [NT] LCS-4 93%
Chlorpyriphos-methyl mg/kg [NT] [NT] [NR] [NR]
Diazinon mg/kg [NT] [NT] [NR] [NR]
Dichlorvos mg/kg [NT] [NT] LCS-4 86%
Dimethoate mg/kg [NT] [NT] [NR] [NR]
Ethion mg/kg [NT] [NT] LCS-4 114%
Fenitrothion mg/kg [NT] [NT] LCS-4 107%
Malathion mg/kg [NT] [NT] LCS-4 85%
Parathion mg/kg [NT] [NT] LCS-4 97%
Ronnel mg/kg [NT] [NT] LCS-4 104%
Surrogate TCMX % [NT] [NT] LCS-4 104%
QUALITY CONTROL UNITS Dup. Sm# Duplicate Spike Sm# Spike % Recovery
PCBs in Soil Base + Duplicate + %RPD
Date extracted - [NT] [NT] LCS-4 14/06/2017
Date analysed - [NT] [NT] LCS-4 14/06/2017
Aroclor 1016 mg/kg [NT] [NT] [NR] [NR]
Aroclor 1221 mg/kg [NT] [NT] [NR] [NR]
Aroclor 1232 mg/kg [NT] [NT] [NR] [NR]
Aroclor 1242 mg/kg [NT] [NT] [NR] [NR]
Aroclor 1248 mg/kg [NT] [NT] [NR] [NR]
Aroclor 1254 mg/kg [NT] [NT] LCS-4 117%
Aroclor 1260 mg/kg [NT] [NT] [NR] [NR]
Surrogate TCLMX % [NT] [NT] LCS-4 104%
Page 25 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
QUALITY CONTROL UNITS Dup. Sm# Duplicate Spike Sm# Spike % Recovery
Acid Extractable metals in
soil
Base + Duplicate + %RPD
Date prepared - [NT] [NT] LCS-4 14/06/2017
Date analysed - [NT] [NT] LCS-4 14/06/2017
Arsenic mg/kg [NT] [NT] LCS-4 114%
Cadmium mg/kg [NT] [NT] LCS-4 100%
Chromium mg/kg [NT] [NT] LCS-4 109%
Copper mg/kg [NT] [NT] LCS-4 108%
Lead mg/kg [NT] [NT] LCS-4 104%
Mercury mg/kg [NT] [NT] LCS-4 105%
Nickel mg/kg [NT] [NT] LCS-4 100%
Zinc mg/kg [NT] [NT] LCS-4 103%
QUALITY CONTROL UNITS Dup. Sm# Duplicate Spike Sm# Spike % Recovery
HM in water - dissolved Base + Duplicate + %RPD
Date prepared - [NT] [NT] 169056-4 14/06/2017
Date analysed - [NT] [NT] 169056-4 14/06/2017
Arsenic-Dissolved µg/L [NT] [NT] 169056-4 99%
Cadmium-Dissolved µg/L [NT] [NT] 169056-4 99%
Chromium-Dissolved µg/L [NT] [NT] 169056-4 101%
Copper-Dissolved µg/L [NT] [NT] 169056-4 98%
Lead-Dissolved µg/L [NT] [NT] 169056-4 97%
Mercury-Dissolved µg/L [NT] [NT] [NR] [NR]
Nickel-Dissolved µg/L [NT] [NT] 169056-4 94%
Zinc-Dissolved µg/L [NT] [NT] 169056-4 100%
Page 26 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
Report Comments:
Dissolved Metals: The preserved sample provided was not identified as
either total or dissolved, and appears to contain sediment and/or colloids,
therefore the unpreserved sample was filtered through 0.45 µm filter at the lab.
Note: there is a possibility some elements may be underestimated.
Faecal Coliform analysed by Sonic Food & Water Testing. Report No.W1710975.
Asbestos ID was analysed by Approved Identifier: Not applicable for this job
Asbestos ID was authorised by Approved Signatory: Not applicable for this job
INS: Insufficient sample for this test PQL: Practical Quantitation Limit NT: Not tested
NR: Test not required RPD: Relative Percent Difference NA: Test not required
<: Less than >: Greater than LCS: Laboratory Control Sample
Page 27 of 28Envirolab Reference: 169056
Revision No: R 00
Client Reference: DL4140, Diversi - Riverstone
Quality Control Definitions
Blank: This is the component of the analytical signal which is not derived from the sample but from reagents,
glassware etc, can be determined by processing solvents and reagents in exactly the same manner as for samples.
Duplicate : This is the complete duplicate analysis of a sample from the process batch. If possible, the sample
selected should be one where the analyte concentration is easily measurable.
Matrix Spike : A portion of the sample is spiked with a known concentration of target analyte. The purpose of the matrix
spike is to monitor the performance of the analytical method used and to determine whether matrix interferences exist.
LCS (Laboratory Control Sample) : This comprises either a standard reference material or a control matrix (such as a blank
sand or water) fortified with analytes representative of the analyte class. It is simply a check sample.
Surrogate Spike: Surrogates are known additions to each sample, blank, matrix spike and LCS in a batch, of compounds
which are similar to the analyte of interest, however are not expected to be found in real samples.
Laboratory Acceptance Criteria
Duplicate sample and matrix spike recoveries may not be reported on smaller jobs, however, were analysed at a frequency
to meet or exceed NEPM requirements. All samples are tested in batches of 20. The duplicate sample RPD and matrix
spike recoveries for the batch were within the laboratory acceptance criteria.
Filters, swabs, wipes, tubes and badges will not have duplicate data as the whole sample is generally extracted
during sample extraction.
Spikes for Physical and Aggregate Tests are not applicable.
For VOCs in water samples, three vials are required for duplicate or spike analysis.
Duplicates: <5xPQL - any RPD is acceptable; >5xPQL - 0-50% RPD is acceptable.
Matrix Spikes, LCS and Surrogate recoveries: Generally 70-130% for inorganics/metals; 60-140%
for organics (+/-50% surrogates) and 10-140% for labile SVOCs (including labile surrogates), ultra trace organics
and speciated phenols is acceptable.
In circumstances where no duplicate and/or sample spike has been reported at 1 in 10 and/or 1 in 20 samples
respectively, the sample volume submitted was insufficient in order to satisfy laboratory QA/QC protocols.
When samples are received where certain analytes are outside of recommended technical holding times (THTs),
the analysis has proceeded. Where analytes are on the verge of breaching THTs, every effort will be made to analyse
within the THT or as soon as practicable.
Where sampling dates are not provided, Envirolab are not in a position to comment on the validity
of the analysis where recommended technical holding times may have been breached.
Measurement Uncertainty estimates are available for most tests upon request.
Page 28 of 28Envirolab Reference: 169056
Revision No: R 00
Envirolab Services Pty Ltd
ABN 37 112 535 645
12 Ashley St Chatswood NSW 2067
ph 02 9910 6200 fax 02 9910 6201
www.envirolab.com.au
CERTIFICATE OF ANALYSIS 192254
Unit 11 Macquarie Link, 277 Lane Cove Rd, Macquarie Park, NSW, 2113Address
Russell JarmanAttention
DLA Environmental Services Pty LtdClient
Client Details
22/05/2018Date completed instructions received
22/05/2018Date samples received
2 Soil, 2 WaterNumber of Samples
DL0462359Your Reference
Sample Details
Please refer to the last page of this report for any comments relating to the results.
Results are reported on a dry weight basis for solids and on an as received basis for other matrices.
Samples were analysed as received from the client. Results relate specifically to the samples as received.
Please refer to the following pages for results, methodology summary and quality control data.
Analysis Details
Tests not covered by NATA are denoted with *Accredited for compliance with ISO/IEC 17025 - Testing.
NATA Accreditation Number 2901. This document shall not be reproduced except in full.
29/05/2018Date of Issue
29/05/2018Date results requested by
Report Details
Jacinta Hurst, Laboratory Manager
Authorised By
Steven Luong, Senior Chemist
Nick Sarlamis, Inorganics Supervisor
Nancy Zhang, Assistant Lab Manager
Long Pham, Team Leader, Metals
Jeremy Faircloth, Organics Supervisor
Jaimie Loa-Kum-Cheung, Senior Chemist
Dragana Tomas, Senior Chemist
Results Approved By
Revision No: R00
192254Envirolab Reference: Page | 1 of 29
Client Reference: DL0462359
9694%Surrogate aaa-Trifluorotoluene
<1<1mg/kgTotal +ve Xylenes
<1<1mg/kgnaphthalene
<1<1mg/kgo-Xylene
<2<2mg/kgm+p-xylene
<1<1mg/kgEthylbenzene
<0.5<0.5mg/kgToluene
<0.2<0.2mg/kgBenzene
<25<25mg/kgvTPH C6 - C10 less BTEX (F1)
<25<25mg/kgTRH C6 - C10
<25<25mg/kgTRH C6 - C9
24/05/201824/05/2018-Date analysed
23/05/201823/05/2018-Date extracted
SoilSoilType of sample
22/05/201822/05/2018Date Sampled
Sed-2Sed-1UNITSYour Reference
192254-2192254-1Our Reference
vTRH(C6-C10)/BTEXN in Soil
Envirolab Reference: 192254
R00Revision No:
Page | 2 of 29
Client Reference: DL0462359
109112%Surrogate o-Terphenyl
440500mg/kgTotal +ve TRH (>C10-C40)
140160mg/kgTRH >C34 -C40
300340mg/kgTRH >C16 -C34
<50<50mg/kgTRH >C10 - C16 less Naphthalene (F2)
<50<50mg/kgTRH >C10 -C16
250280mg/kgTRH C29 - C36
140160mg/kgTRH C15 - C28
<50<50mg/kgTRH C10 - C14
25/05/201825/05/2018-Date analysed
23/05/201823/05/2018-Date extracted
SoilSoilType of sample
22/05/201822/05/2018Date Sampled
Sed-2Sed-1UNITSYour Reference
192254-2192254-1Our Reference
svTRH (C10-C40) in Soil
Envirolab Reference: 192254
R00Revision No:
Page | 3 of 29
Client Reference: DL0462359
100103%Surrogate p-Terphenyl-d14
<0.5<0.5mg/kgBenzo(a)pyrene TEQ calc(PQL)
<0.5<0.5mg/kgBenzo(a)pyrene TEQ calc(half)
<0.5<0.5mg/kgBenzo(a)pyrene TEQ calc (zero)
<0.05<0.05mg/kgTotal +ve PAH's
<0.1<0.1mg/kgBenzo(g,h,i)perylene
<0.1<0.1mg/kgDibenzo(a,h)anthracene
<0.1<0.1mg/kgIndeno(1,2,3-c,d)pyrene
<0.05<0.05mg/kgBenzo(a)pyrene
<0.2<0.2mg/kgBenzo(b,j+k)fluoranthene
<0.1<0.1mg/kgChrysene
<0.1<0.1mg/kgBenzo(a)anthracene
<0.1<0.1mg/kgPyrene
<0.1<0.1mg/kgFluoranthene
<0.1<0.1mg/kgAnthracene
<0.1<0.1mg/kgPhenanthrene
<0.1<0.1mg/kgFluorene
<0.1<0.1mg/kgAcenaphthene
<0.1<0.1mg/kgAcenaphthylene
<0.1<0.1mg/kgNaphthalene
24/05/201824/05/2018-Date analysed
23/05/201823/05/2018-Date extracted
SoilSoilType of sample
22/05/201822/05/2018Date Sampled
Sed-2Sed-1UNITSYour Reference
192254-2192254-1Our Reference
PAHs in Soil
Envirolab Reference: 192254
R00Revision No:
Page | 4 of 29
Client Reference: DL0462359
109112%Surrogate TCMX
<0.1<0.1mg/kgTotal +ve DDT+DDD+DDE
<0.1<0.1mg/kgMethoxychlor
<0.1<0.1mg/kgEndosulfan Sulphate
<0.1<0.1mg/kgEndrin Aldehyde
<0.1<0.1mg/kgpp-DDT
<0.1<0.1mg/kgEndosulfan II
<0.1<0.1mg/kgpp-DDD
<0.1<0.1mg/kgEndrin
<0.1<0.1mg/kgDieldrin
<0.1<0.1mg/kgpp-DDE
<0.1<0.1mg/kgEndosulfan I
<0.1<0.1mg/kgalpha-chlordane
<0.1<0.1mg/kggamma-Chlordane
<0.1<0.1mg/kgHeptachlor Epoxide
<0.1<0.1mg/kgAldrin
<0.1<0.1mg/kgdelta-BHC
<0.1<0.1mg/kgHeptachlor
<0.1<0.1mg/kgbeta-BHC
<0.1<0.1mg/kggamma-BHC
<0.1<0.1mg/kgalpha-BHC
<0.1<0.1mg/kgHCB
24/05/201824/05/2018-Date analysed
23/05/201823/05/2018-Date extracted
SoilSoilType of sample
22/05/201822/05/2018Date Sampled
Sed-2Sed-1UNITSYour Reference
192254-2192254-1Our Reference
Organochlorine Pesticides in soil
Envirolab Reference: 192254
R00Revision No:
Page | 5 of 29
Client Reference: DL0462359
109112%Surrogate TCMX
<0.1<0.1mg/kgRonnel
<0.1<0.1mg/kgParathion
<0.1<0.1mg/kgMalathion
<0.1<0.1mg/kgFenitrothion
<0.1<0.1mg/kgEthion
<0.1<0.1mg/kgDimethoate
<0.1<0.1mg/kgDichlorvos
<0.1<0.1mg/kgDiazinon
<0.1<0.1mg/kgChlorpyriphos-methyl
<0.1<0.1mg/kgChlorpyriphos
<0.1<0.1mg/kgBromophos-ethyl
<0.1<0.1mg/kgAzinphos-methyl (Guthion)
24/05/201824/05/2018-Date analysed
23/05/201823/05/2018-Date extracted
SoilSoilType of sample
22/05/201822/05/2018Date Sampled
Sed-2Sed-1UNITSYour Reference
192254-2192254-1Our Reference
Organophosphorus Pesticides
Envirolab Reference: 192254
R00Revision No:
Page | 6 of 29
Client Reference: DL0462359
5972mg/kgZinc
98mg/kgNickel
<0.1<0.1mg/kgMercury
2425mg/kgLead
1520mg/kgCopper
2120mg/kgChromium
<0.4<0.4mg/kgCadmium
1615mg/kgArsenic
23/05/201823/05/2018-Date analysed
23/05/201823/05/2018-Date prepared
SoilSoilType of sample
22/05/201822/05/2018Date Sampled
Sed-2Sed-1UNITSYour Reference
192254-2192254-1Our Reference
Acid Extractable metals in soil
Envirolab Reference: 192254
R00Revision No:
Page | 7 of 29
Client Reference: DL0462359
35,0004,900MPN/100gFaecal Coliforms in soil
23/05/201823/05/2018-Date testing completed
23/05/201823/05/2018-Date testing started
SoilSoilType of sample
22/05/201822/05/2018Date Sampled
Sed-2Sed-1UNITSYour Reference
192254-2192254-1Our Reference
Micro testing in soil
Envirolab Reference: 192254
R00Revision No:
Page | 8 of 29
Client Reference: DL0462359
3447%Moisture
24/05/201824/05/2018-Date analysed
23/05/201823/05/2018-Date prepared
SoilSoilType of sample
22/05/201822/05/2018Date Sampled
Sed-2Sed-1UNITSYour Reference
192254-2192254-1Our Reference
Moisture
Envirolab Reference: 192254
R00Revision No:
Page | 9 of 29
Client Reference: DL0462359
8981%Surrogate TCMX
<0.2<0.2µg/LMethoxychlor
<0.2<0.2µg/LEndosulfan Sulphate
<0.2<0.2µg/LEndrin Aldehyde
<0.2<0.2µg/Lpp-DDT
<0.2<0.2µg/LEndosulfan II
<0.2<0.2µg/Lpp-DDD
<0.2<0.2µg/LEndrin
<0.2<0.2µg/LDieldrin
<0.2<0.2µg/Lpp-DDE
<0.2<0.2µg/LEndosulfan I
<0.2<0.2µg/Lalpha-Chlordane
<0.2<0.2µg/Lgamma-Chlordane
<0.2<0.2µg/LHeptachlor Epoxide
<0.2<0.2µg/LAldrin
<0.2<0.2µg/Ldelta-BHC
<0.2<0.2µg/LHeptachlor
<0.2<0.2µg/Lbeta-BHC
<0.2<0.2µg/Lgamma-BHC
<0.2<0.2µg/Lalpha-BHC
<0.2<0.2µg/LHCB
23/05/201823/05/2018-Date analysed
23/05/201823/05/2018-Date extracted
WaterWaterType of sample
22/05/201822/05/2018Date Sampled
W2W1UNITSYour Reference
192254-4192254-3Our Reference
OCP in water
Envirolab Reference: 192254
R00Revision No:
Page | 10 of 29
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8981%Surrogate TCMX
<0.2<0.2µg/LRonnel
<0.2<0.2µg/LParathion
<0.2<0.2µg/LMalathion
<0.2<0.2µg/LFenitrothion
<0.2<0.2µg/LEthion
<0.2<0.2µg/LDimethoate
<0.2<0.2µg/LDichlorovos
<0.2<0.2µg/LDiazinon
<0.2<0.2µg/LChlorpyriphos-methyl
<0.2<0.2µg/LChlorpyriphos
<0.2<0.2µg/LBromophos ethyl
<0.2<0.2µg/LAzinphos-methyl (Guthion)
23/05/201823/05/2018-Date analysed
23/05/201823/05/2018-Date extracted
WaterWaterType of sample
22/05/201822/05/2018Date Sampled
W2W1UNITSYour Reference
192254-4192254-3Our Reference
OP Pesticides in water
Envirolab Reference: 192254
R00Revision No:
Page | 11 of 29
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6626mg/LBOD
5816mg/LTotal Suspended Solids
210220µS/cmElectrical Conductivity
7.17.0pH UnitspH
22/05/201522/05/2015-Date analysed
22/05/201822/05/2018-Date prepared
WaterWaterType of sample
22/05/201822/05/2018Date Sampled
W2W1UNITSYour Reference
192254-4192254-3Our Reference
Miscellaneous Inorganics
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41µg/LZinc-Total
<1<1µg/LNickel-Total
<0.05<0.05µg/LMercury-Total
<1<1µg/LLead-Total
<1<1µg/LCopper-Total
<1<1µg/LChromium-Total
<0.1<0.1µg/LCadmium-Total
1<1µg/LArsenic-Total
24/05/201824/05/2018-Date analysed
23/05/201823/05/2018-Date prepared
WaterWaterType of sample
22/05/201822/05/2018Date Sampled
W2W1UNITSYour Reference
192254-4192254-3Our Reference
HM in water - total
Envirolab Reference: 192254
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230 NBO230 NBOcfu/100mLFaecal Coliforms
23/05/201823/05/2018-Date of testing
WaterWaterType of sample
22/05/201822/05/2018Date Sampled
W2W1UNITSYour Reference
192254-4192254-3Our Reference
Microbiologocal Testing
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Soil samples are extracted with dichloromethane/acetone and waters with dichloromethane and analysed by GC with dual ECD's.
Org-008
Soil samples are extracted with dichloromethane/acetone and waters with dichloromethane and analysed by GC with dual ECD's. Note, the Total +ve reported DDD+DDE+DDT PQL is reflective of the lowest individual PQL and is therefore simply a sum of the positive individually report DDD+DDE+DDT.
Org-005
Soil samples are extracted with dichloromethane/acetone and waters with dichloromethane and analysed by GC with dual ECD's.
Org-005
Soil samples are extracted with Dichloromethane/Acetone and waters with Dichloromethane and analysed by GC-FID. F2 = (>C10-C16)-Naphthalene as per NEPM B1 Guideline on Investigation Levels for Soil and Groundwater (HSLs Tables 1A (3, 4)). Note Naphthalene is determined from the VOC analysis. Note, the Total +ve TRH PQL is reflective of the lowest individual PQL and is therefore "Total +ve TRH" is simply a sum of the positive individual TRH fractions (>C10-C40).
Org-003
Soil samples are extracted with Dichloromethane/Acetone and waters with Dichloromethane and analysed by GC-FID. F2 = (>C10-C16)-Naphthalene as per NEPM B1 Guideline on Investigation Levels for Soil and Groundwater (HSLs Tables 1A (3, 4)). Note Naphthalene is determined from the VOC analysis.
Org-003
Determination of various metals by ICP-MS. Metals-022
Determination of Mercury by Cold Vapour AAS. Metals-021
Determination of various metals by ICP-AES. Metals-020
BOD - Analysed in accordance with APHA latest edition 5210 D and in house INORG-091.Inorg-091
Suspended Solids - determined gravimetricially by filtration of the sample. The samples are dried at 104+/-5°C.Inorg-019
Moisture content determined by heating at 105+/-5 °C for a minimum of 12 hours.
Inorg-008
Conductivity and Salinity - measured using a conductivity cell at 25°C in accordance with APHA latest edition 2510 and Rayment & Lyons.
Inorg-002
pH - Measured using pH meter and electrode in accordance with APHA latest edition, 4500-H+. Please note that the results for water analyses are indicative only, as analysis outside of the APHA storage times.
Inorg-001
Subcontracted to Sonic Food & Water Testing. NATA Accreditation No. 4034.Ext-008
Methodology SummaryMethod ID
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Soil samples are extracted with methanol and spiked into water prior to analysing by purge and trap GC-MS. Water samples are analysed directly by purge and trap GC-MS. F1 = (C6-C10)-BTEX as per NEPM B1 Guideline on Investigation Levels for Soil and Groundwater. Note, the Total +ve Xylene PQL is reflective of the lowest individual PQL and is therefore "Total +ve Xylenes" is simply a sum of the positive individual Xylenes.
Org-016
Soil samples are extracted with methanol and spiked into water prior to analysing by purge and trap GC-MS. Water samples are analysed directly by purge and trap GC-MS. F1 = (C6-C10)-BTEX as per NEPM B1 Guideline on Investigation Levels for Soil and Groundwater.
Org-016
Soil samples are extracted with methanol and spiked into water prior to analysing by purge and trap GC-MS. Org-014
Soil samples are extracted with Dichloromethane/Acetone and waters with Dichloromethane and analysed by GC-MS. Benzo(a)pyrene TEQ as per NEPM B1 Guideline on Investigation Levels for Soil and Groundwater - 2013. For soil results:- 1. ‘EQ PQL’values are assuming all contributing PAHs reported as <PQL are actually at the PQL. This is the most conservative approach and can give false positive TEQs given that PAHs that contribute to the TEQ calculation may not be present. 2. ‘EQ zero’values are assuming all contributing PAHs reported as <PQL are zero. This is the least conservative approach and is more susceptible to false negative TEQs when PAHs that contribute to the TEQ calculation are present but below PQL. 3. ‘EQ half PQL’values are assuming all contributing PAHs reported as <PQL are half the stipulated PQL. Hence a mid-point between the most and least conservative approaches above. Note, the Total +ve PAHs PQL is reflective of the lowest individual PQL and is therefore "Total +ve PAHs" is simply a sum of the positive individual PAHs.
Org-012
Methodology SummaryMethod ID
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[NT]118[NT][NT][NT][NT]117Org-016%Surrogate aaa-Trifluorotoluene
[NT][NT][NT][NT][NT][NT]<1Org-0141mg/kgnaphthalene
[NT]131[NT][NT][NT][NT]<1Org-0161mg/kgo-Xylene
[NT]126[NT][NT][NT][NT]<2Org-0162mg/kgm+p-xylene
[NT]125[NT][NT][NT][NT]<1Org-0161mg/kgEthylbenzene
[NT]123[NT][NT][NT][NT]<0.5Org-0160.5mg/kgToluene
[NT]119[NT][NT][NT][NT]<0.2Org-0160.2mg/kgBenzene
[NT]124[NT][NT][NT][NT]<25Org-01625mg/kgTRH C6 - C10
[NT]124[NT][NT][NT][NT]<25Org-01625mg/kgTRH C6 - C9
[NT]24/05/2018[NT][NT][NT][NT]24/05/2018-Date analysed
[NT]23/05/2018[NT][NT][NT][NT]23/05/2018-Date extracted
[NT]LCS-3RPDDup.Base#BlankMethodPQLUnitsTest Description
Spike Recovery %DuplicateQUALITY CONTROL: vTRH(C6-C10)/BTEXN in Soil
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[NT]113[NT][NT][NT][NT]96Org-003%Surrogate o-Terphenyl
[NT]92[NT][NT][NT][NT]<100Org-003100mg/kgTRH >C34 -C40
[NT]94[NT][NT][NT][NT]<100Org-003100mg/kgTRH >C16 -C34
[NT]114[NT][NT][NT][NT]<50Org-00350mg/kgTRH >C10 -C16
[NT]92[NT][NT][NT][NT]<100Org-003100mg/kgTRH C29 - C36
[NT]94[NT][NT][NT][NT]<100Org-003100mg/kgTRH C15 - C28
[NT]114[NT][NT][NT][NT]<50Org-00350mg/kgTRH C10 - C14
[NT]24/05/2018[NT][NT][NT][NT]24/05/2018-Date analysed
[NT]23/05/2018[NT][NT][NT][NT]23/05/2018-Date extracted
[NT]LCS-3RPDDup.Base#BlankMethodPQLUnitsTest Description
Spike Recovery %DuplicateQUALITY CONTROL: svTRH (C10-C40) in Soil
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[NT]115[NT][NT][NT][NT]98Org-012%Surrogate p-Terphenyl-d14
[NT][NT][NT][NT][NT][NT]<0.1Org-0120.1mg/kgBenzo(g,h,i)perylene
[NT][NT][NT][NT][NT][NT]<0.1Org-0120.1mg/kgDibenzo(a,h)anthracene
[NT][NT][NT][NT][NT][NT]<0.1Org-0120.1mg/kgIndeno(1,2,3-c,d)pyrene
[NT]95[NT][NT][NT][NT]<0.05Org-0120.05mg/kgBenzo(a)pyrene
[NT][NT][NT][NT][NT][NT]<0.2Org-0120.2mg/kgBenzo(b,j+k)fluoranthene
[NT]95[NT][NT][NT][NT]<0.1Org-0120.1mg/kgChrysene
[NT][NT][NT][NT][NT][NT]<0.1Org-0120.1mg/kgBenzo(a)anthracene
[NT]98[NT][NT][NT][NT]<0.1Org-0120.1mg/kgPyrene
[NT]98[NT][NT][NT][NT]<0.1Org-0120.1mg/kgFluoranthene
[NT][NT][NT][NT][NT][NT]<0.1Org-0120.1mg/kgAnthracene
[NT]96[NT][NT][NT][NT]<0.1Org-0120.1mg/kgPhenanthrene
[NT]97[NT][NT][NT][NT]<0.1Org-0120.1mg/kgFluorene
[NT][NT][NT][NT][NT][NT]<0.1Org-0120.1mg/kgAcenaphthene
[NT][NT][NT][NT][NT][NT]<0.1Org-0120.1mg/kgAcenaphthylene
[NT]96[NT][NT][NT][NT]<0.1Org-0120.1mg/kgNaphthalene
[NT]24/05/2018[NT][NT][NT][NT]24/05/2018-Date analysed
[NT]23/05/2018[NT][NT][NT][NT]23/05/2018-Date extracted
[NT]LCS-3RPDDup.Base#BlankMethodPQLUnitsTest Description
Spike Recovery %DuplicateQUALITY CONTROL: PAHs in Soil
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[NT]108[NT][NT][NT][NT]88Org-005%Surrogate TCMX
[NT][NT][NT][NT][NT][NT]<0.1Org-0050.1mg/kgMethoxychlor
[NT]86[NT][NT][NT][NT]<0.1Org-0050.1mg/kgEndosulfan Sulphate
[NT][NT][NT][NT][NT][NT]<0.1Org-0050.1mg/kgEndrin Aldehyde
[NT][NT][NT][NT][NT][NT]<0.1Org-0050.1mg/kgpp-DDT
[NT][NT][NT][NT][NT][NT]<0.1Org-0050.1mg/kgEndosulfan II
[NT]79[NT][NT][NT][NT]<0.1Org-0050.1mg/kgpp-DDD
[NT]91[NT][NT][NT][NT]<0.1Org-0050.1mg/kgEndrin
[NT]97[NT][NT][NT][NT]<0.1Org-0050.1mg/kgDieldrin
[NT]94[NT][NT][NT][NT]<0.1Org-0050.1mg/kgpp-DDE
[NT][NT][NT][NT][NT][NT]<0.1Org-0050.1mg/kgEndosulfan I
[NT][NT][NT][NT][NT][NT]<0.1Org-0050.1mg/kgalpha-chlordane
[NT][NT][NT][NT][NT][NT]<0.1Org-0050.1mg/kggamma-Chlordane
[NT]78[NT][NT][NT][NT]<0.1Org-0050.1mg/kgHeptachlor Epoxide
[NT][NT][NT][NT][NT][NT]<0.1Org-0050.1mg/kgAldrin
[NT][NT][NT][NT][NT][NT]<0.1Org-0050.1mg/kgdelta-BHC
[NT]78[NT][NT][NT][NT]<0.1Org-0050.1mg/kgHeptachlor
[NT]90[NT][NT][NT][NT]<0.1Org-0050.1mg/kgbeta-BHC
[NT][NT][NT][NT][NT][NT]<0.1Org-0050.1mg/kggamma-BHC
[NT]76[NT][NT][NT][NT]<0.1Org-0050.1mg/kgalpha-BHC
[NT][NT][NT][NT][NT][NT]<0.1Org-0050.1mg/kgHCB
[NT]24/05/2018[NT][NT][NT][NT]24/05/2018-Date analysed
[NT]23/05/2018[NT][NT][NT][NT]23/05/2018-Date extracted
[NT]LCS-3RPDDup.Base#BlankMethodPQLUnitsTest Description
Spike Recovery %DuplicateQUALITY CONTROL: Organochlorine Pesticides in soil
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[NT]87[NT][NT][NT][NT]88Org-008%Surrogate TCMX
[NT]101[NT][NT][NT][NT]<0.1Org-0080.1mg/kgRonnel
[NT]82[NT][NT][NT][NT]<0.1Org-0080.1mg/kgParathion
[NT]71[NT][NT][NT][NT]<0.1Org-0080.1mg/kgMalathion
[NT]82[NT][NT][NT][NT]<0.1Org-0080.1mg/kgFenitrothion
[NT]114[NT][NT][NT][NT]<0.1Org-0080.1mg/kgEthion
[NT][NT][NT][NT][NT][NT]<0.1Org-0080.1mg/kgDimethoate
[NT]94[NT][NT][NT][NT]<0.1Org-0080.1mg/kgDichlorvos
[NT][NT][NT][NT][NT][NT]<0.1Org-0080.1mg/kgDiazinon
[NT][NT][NT][NT][NT][NT]<0.1Org-0080.1mg/kgChlorpyriphos-methyl
[NT]99[NT][NT][NT][NT]<0.1Org-0080.1mg/kgChlorpyriphos
[NT][NT][NT][NT][NT][NT]<0.1Org-0080.1mg/kgBromophos-ethyl
[NT][NT][NT][NT][NT][NT]<0.1Org-0080.1mg/kgAzinphos-methyl (Guthion)
[NT]24/05/2018[NT][NT][NT][NT]24/05/2018-Date analysed
[NT]23/05/2018[NT][NT][NT][NT]23/05/2018-Date extracted
[NT]LCS-3RPDDup.Base#BlankMethodPQLUnitsTest Description
Spike Recovery %DuplicateQUALITY CONTROL: Organophosphorus Pesticides
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98101374721<1Metals-0201mg/kgZinc
849812981<1Metals-0201mg/kgNickel
1021130<0.1<0.11<0.1Metals-0210.1mg/kgMercury
83100424251<1Metals-0201mg/kgLead
98103020201<1Metals-0201mg/kgCopper
88105519201<1Metals-0201mg/kgChromium
891020<0.4<0.41<0.4Metals-0200.4mg/kgCadmium
85107616151<4Metals-0204mg/kgArsenic
23/05/201823/05/201823/05/201823/05/2018123/05/2018-Date analysed
23/05/201823/05/201823/05/201823/05/2018123/05/2018-Date prepared
192254-2LCS-3RPDDup.Base#BlankMethodPQLUnitsTest Description
Spike Recovery %DuplicateQUALITY CONTROL: Acid Extractable metals in soil
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[NT]107[NT][NT][NT][NT]93Org-005%Surrogate TCMX
[NT][NT][NT][NT][NT][NT]<0.2Org-0050.2µg/LMethoxychlor
[NT]85[NT][NT][NT][NT]<0.2Org-0050.2µg/LEndosulfan Sulphate
[NT][NT][NT][NT][NT][NT]<0.2Org-0050.2µg/LEndrin Aldehyde
[NT][NT][NT][NT][NT][NT]<0.2Org-0050.2µg/Lpp-DDT
[NT][NT][NT][NT][NT][NT]<0.2Org-0050.2µg/LEndosulfan II
[NT]86[NT][NT][NT][NT]<0.2Org-0050.2µg/Lpp-DDD
[NT]85[NT][NT][NT][NT]<0.2Org-0050.2µg/LEndrin
[NT]94[NT][NT][NT][NT]<0.2Org-0050.2µg/LDieldrin
[NT]91[NT][NT][NT][NT]<0.2Org-0050.2µg/Lpp-DDE
[NT][NT][NT][NT][NT][NT]<0.2Org-0050.2µg/LEndosulfan I
[NT][NT][NT][NT][NT][NT]<0.2Org-0050.2µg/Lalpha-Chlordane
[NT][NT][NT][NT][NT][NT]<0.2Org-0050.2µg/Lgamma-Chlordane
[NT]82[NT][NT][NT][NT]<0.2Org-0050.2µg/LHeptachlor Epoxide
[NT]85[NT][NT][NT][NT]<0.2Org-0050.2µg/LAldrin
[NT][NT][NT][NT][NT][NT]<0.2Org-0050.2µg/Ldelta-BHC
[NT]85[NT][NT][NT][NT]<0.2Org-0050.2µg/LHeptachlor
[NT]77[NT][NT][NT][NT]<0.2Org-0050.2µg/Lbeta-BHC
[NT][NT][NT][NT][NT][NT]<0.2Org-0050.2µg/Lgamma-BHC
[NT]86[NT][NT][NT][NT]<0.2Org-0050.2µg/Lalpha-BHC
[NT][NT][NT][NT][NT][NT]<0.2Org-0050.2µg/LHCB
[NT]23/05/2018[NT][NT][NT][NT]23/05/2018-Date analysed
[NT]23/05/2018[NT][NT][NT][NT]23/05/2018-Date extracted
[NT]LCS-W1RPDDup.Base#BlankMethodPQLUnitsTest Description
Spike Recovery %DuplicateQUALITY CONTROL: OCP in water
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[NT]102[NT][NT][NT][NT]93Org-008%Surrogate TCMX
[NT]86[NT][NT][NT][NT]<0.2Org-0080.2µg/LRonnel
[NT]98[NT][NT][NT][NT]<0.2Org-0080.2µg/LParathion
[NT]96[NT][NT][NT][NT]<0.2Org-0080.2µg/LMalathion
[NT]96[NT][NT][NT][NT]<0.2Org-0080.2µg/LFenitrothion
[NT]84[NT][NT][NT][NT]<0.2Org-0080.2µg/LEthion
[NT][NT][NT][NT][NT][NT]<0.2Org-0080.2µg/LDimethoate
[NT]88[NT][NT][NT][NT]<0.2Org-0080.2µg/LDichlorovos
[NT][NT][NT][NT][NT][NT]<0.2Org-0080.2µg/LDiazinon
[NT][NT][NT][NT][NT][NT]<0.2Org-0080.2µg/LChlorpyriphos-methyl
[NT]82[NT][NT][NT][NT]<0.2Org-0080.2µg/LChlorpyriphos
[NT][NT][NT][NT][NT][NT]<0.2Org-0080.2µg/LBromophos ethyl
[NT][NT][NT][NT][NT][NT]<0.2Org-0080.2µg/LAzinphos-methyl (Guthion)
[NT]23/05/2018[NT][NT][NT][NT]23/05/2018-Date analysed
[NT]23/05/2018[NT][NT][NT][NT]23/05/2018-Date extracted
[NT]LCS-W1RPDDup.Base#BlankMethodPQLUnitsTest Description
Spike Recovery %DuplicateQUALITY CONTROL: OP Pesticides in water
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[NT]82[NT][NT][NT][NT]<5Inorg-0915mg/LBOD
[NT]102[NT][NT][NT][NT]<5Inorg-0195mg/LTotal Suspended Solids
[NT]100[NT][NT][NT][NT]<1Inorg-0021µS/cmElectrical Conductivity
[NT]102[NT][NT][NT][NT][NT]Inorg-001pH UnitspH
[NT]22/05/2018[NT][NT][NT][NT]22/05/2018-Date analysed
[NT]22/05/2018[NT][NT][NT][NT]22/05/2018-Date prepared
[NT]LCS-W1RPDDup.Base#BlankMethodPQLUnitsTest Description
Spike Recovery %DuplicateQUALITY CONTROL: Miscellaneous Inorganics
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[NT]91[NT]13<1Metals-0221µg/LZinc-Total
[NT]92[NT]<13<1Metals-0221µg/LNickel-Total
961000<0.05<0.053<0.05Metals-0210.05µg/LMercury-Total
[NT]99[NT]<13<1Metals-0221µg/LLead-Total
[NT]96[NT]<13<1Metals-0221µg/LCopper-Total
[NT]97[NT]<13<1Metals-0221µg/LChromium-Total
[NT]97[NT]<0.13<0.1Metals-0220.1µg/LCadmium-Total
[NT]95[NT]<13<1Metals-0221µg/LArsenic-Total
24/05/201824/05/201824/05/201824/05/2018324/05/2018-Date analysed
23/05/201823/05/201823/05/201823/05/2018323/05/2018-Date prepared
192254-4LCS-W2RPDDup.Base#BlankMethodPQLUnitsTest Description
Spike Recovery %DuplicateQUALITY CONTROL: HM in water - total
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Not ReportedNR
National Environmental Protection MeasureNEPM
Not specifiedNS
Laboratory Control SampleLCS
Relative Percent DifferenceRPD
Greater than>
Less than<
Practical Quantitation LimitPQL
Insufficient sample for this testINS
Test not requiredNA
Not testedNT
Result Definitions
Australian Drinking Water Guidelines recommend that Thermotolerant Coliform, Faecal Enterococci, & E.Coli levels are less than1cfu/100mL. The recommended maximums are taken from "Australian Drinking Water Guidelines", published by NHMRC & ARMC2011.
Surrogates are known additions to each sample, blank, matrix spike and LCS in a batch, of compounds whichare similar to the analyte of interest, however are not expected to be found in real samples.
Surrogate Spike
This comprises either a standard reference material or a control matrix (such as a blank sand or water) fortifiedwith analytes representative of the analyte class. It is simply a check sample.
LCS (LaboratoryControl Sample)
A portion of the sample is spiked with a known concentration of target analyte. The purpose of the matrix spikeis to monitor the performance of the analytical method used and to determine whether matrix interferencesexist.
Matrix Spike
This is the complete duplicate analysis of a sample from the process batch. If possible, the sample selectedshould be one where the analyte concentration is easily measurable.
Duplicate
This is the component of the analytical signal which is not derived from the sample but from reagents,glassware etc, can be determined by processing solvents and reagents in exactly the same manner as forsamples.
Blank
Quality Control Definitions
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Measurement Uncertainty estimates are available for most tests upon request.
Where sampling dates are not provided, Envirolab are not in a position to comment on the validity of the analysis whererecommended technical holding times may have been breached.
When samples are received where certain analytes are outside of recommended technical holding times (THTs), the analysis hasproceeded. Where analytes are on the verge of breaching THTs, every effort will be made to analyse within the THT or as soon aspracticable.
In circumstances where no duplicate and/or sample spike has been reported at 1 in 10 and/or 1 in 20 samples respectively, thesample volume submitted was insufficient in order to satisfy laboratory QA/QC protocols.
Matrix Spikes, LCS and Surrogate recoveries: Generally 70-130% for inorganics/metals; 60-140% for organics (+/-50% surrogates)and 10-140% for labile SVOCs (including labile surrogates), ultra trace organics and speciated phenols is acceptable.
Duplicates: <5xPQL - any RPD is acceptable; >5xPQL - 0-50% RPD is acceptable.
For VOCs in water samples, three vials are required for duplicate or spike analysis.
Spikes for Physical and Aggregate Tests are not applicable.
Filters, swabs, wipes, tubes and badges will not have duplicate data as the whole sample is generally extracted during sampleextraction.
Duplicate sample and matrix spike recoveries may not be reported on smaller jobs, however, were analysed at a frequency to meetor exceed NEPM requirements. All samples are tested in batches of 20. The duplicate sample RPD and matrix spike recoveries forthe batch were within the laboratory acceptance criteria.
Laboratory Acceptance Criteria
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Faecal Coliform in water analysed by Sonic Food & Water Testing. Report No.W1809590. NBO:The presence of competing background organisms may have reduced the count. Faecal Coliform in soil analysed by Sonic Food & Water Testing. Report No.W1809600.
Report Comments
Envirolab Reference: 192254
R00Revision No:
Page | 29 of 29
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Appendix B
Dam Decommissioning Work Method
Procedure
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1 Dam Decommissioning Work Method Procedure
1.1 Scope of Works
Decommissioning Works at the site will consist of the following stages:
Inflow diversion;
Erosion controls;
Dewatering system installation;
Monitoring;
Sediment testing and removal; and
Wall removal and surface contouring.
1.2 Inflow Diversion
If required, an earthen bund can be developed at the dam entry points to prevent runoff
entering the dam once dewatering has commenced. The bund will divert water from the
potential entry points of the dams into a channel to be established prior to the installation of
the bund. The diversions are to be established prior to the dewatering of the dams which will
carry runoff to the grassed or open areas adjacent to the dams.
1.3 Dewatering
The dam will be dewatered by way of application to land using on-site irrigation networks. Due
to the relatively low volume of water currently contained within the dam, the most appropriate
method of dewatering will be via application to land. Water will be pumped into a sprinkler
system using the pumping units to be installed on-site, with the sprinklers positioned so that
water is applied to land within the property boundary. The total area onsite suitable for the
application of irrigation water is variable according to property size.
The most suitable option for the dewatering project has been determined following
consideration of public amenity, environmental impact, flow capacities and monitoring
outcomes among other factors. No water runoff will be permitted, with irrigation intensity
monitored so that runoff does not occur through either pumping or runoff from the sprinkler
system into any off-site receiving environment.
During dewatering activities, the following points should be observed when installing and
operating the dewatering system:
The inlet should be floated to avoid sediment pickup;
Dewatering must cease as directed, to allow for removal of ecology by an ecological
consultant (if required);
Flow rate may need to decrease at low water levels to account for sediments and fauna;
and,
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Action must be taken immediately if the infiltration rates of water to land are exceeded
resulting in the generation of runoff from the site.
1.4 Erosion Controls
As water will be gradually applied to land and not discharged into nearby creeks, no erosion
of the natural environment is expected to occur. Current and existing sedimentation controls
in place around the dams should be continued during all dewatering works. If
construction/demolition works are to be undertaken during or at the time of dewatering,
additional sedimentation controls should be implemented in accordance with Managing Urban
Stormwater Soils and Construction (Landcom, 2004).
Extraction from the dam will take place from high in the water column, which will avoid erosion
of the sediments within the dam. When the water level drops to the extent that sediments are
affected, additional protection should be added to the inlet of the pipes. This may consist of
water being drawn from within a crate wrapped in silt mesh or Geo-fabric. Disturbance will
need to be minimised and the output of the system must be monitored more stringently at this
stage to gauge sediment transport potential.
Once dewatered, sediments will be removed from the base of the dams and stockpiled. All
stockpiles must be protected by silt fencing, which is to be inspected daily and kept in good
working order. Backfilling the dam will be undertaken as part of civil works at the site and
erosion controls should be implemented in accordance with Managing Urban Stormwater
Soils and Construction (Landcom, 2004) and any development conditions.
1.5 Monitoring
1.5.1 Water Levels Water levels should be monitored to ensure adequate water is retained prior to the removal of
fauna (if required) and so that excess sediments are not entrained.
1.5.2 Water Quality No ongoing water testing is required after the initial screening due to the closed system of the
dam and the less sensitive nature of the water application to land.
1.5.3 Ecology There were no signs of significant ecology in the dam when assessed as given the high
bacterial loads within the water it is not anticipated that further ecological assessments or
controls will be required during the dewatering process.
If required, a nominated ecological consultant will monitor all stages of the decommissioning.
This will include approving the inflow mesh cover on the de-watering pipe and all other
aspects of the project that could impact on the local ecology. When the deepest portion of the
dam water is lowered to a nominal depth of one meter, the ecological consultant can begin
the relocation of aquatic fauna. As the remaining water is drained from the dam, the
ecological consultant will continue to relocate the fauna from the dam as required.
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1.5.4 Visual Inspection Visual inspections should be undertaken of the implemented dewatering system on a daily
basis to ensure all aspects are in good working order. Regular inspection of the irrigation area
where dam water is being applied to land should be undertaken to ensure no runoff is being
generated.
1.6 Contingencies
In the event that inspections or monitoring note that key indicators are not compliant, some
action will be required; examples may include:
Blockage or inadequate distribution of irrigation water to land:
1) Check excessive sediments are not being extracted at intake, if so take measures to
rectify.
2) Reassess pumping techniques to ensure adequate equipment is being used; e.g. is the
sprinkler device appropriate for the area of application?
Notable ponding / runoff of applied water:
1. Immediately stop irrigation / land application;
2. Reduce flow rate;
3. Potentially relocate to another area of land for irrigation onsite; or,
4. Cease irrigation until such time as water has infiltrated, prior to continued irrigation.
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2 Soils
2.1 Sediment Reuse
Once dewatered, saturated sediments will be removed from the dam, placed into stockpiles
and drained. Previous assessments of the sediments have confirmed they are suitable for
beneficial land use onsite and do not require further assessment.
The stockpiles should be inspected for evidence of filling or foreign materials. Should
contamination of the sediments be suspected due to the presence of fill or foreign materials,
the material should be tested for all potential contaminants of concern including:
Heavy Metals;
BTEX;
OC/OP Pesticides;
Polycyclic Aromatic Hydrocarbons (PAHS); and
Hydrocarbons.
Sampling should be at the frequency of at least one sample for every 100m3 of sediment.
Where results demonstrate that sediments are compliant with the Health Investigation Levels
provided by the National Environment Protection (Assessment of Site Contamination)
Amendment Measure (NEPM) 2013 for ‘Residential A - Residential with Garden / Accessible
soils’, the sediments are considered suitable for beneficial reuse on the site without
restriction.
2.2 Wall Removal and Surface Contouring
Decommissioning and rehabilitation of the dam structures will be undertaken in accordance
the Development Application consent for civil work at the site. Backfill will be compacted to a
suitable level and final contours will allow overland flow to align with the surrounding
environment. These measures will avoid any future inflow which may cause instability from
tunnelling or erosion.
2.3 Design Irrigation Rate
Local soils have been assessed for the absorption capacity according to the Design Irrigation
Rate in the Australian Standards 1547:2012. The soil description of sandy loams with weak
structure, providing an indicative permeability of >3.0 m/d, indicating the nominated spray
irrigation is suitable for 5mm/day application.
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3 Schedule
With the requirements for the dewatering of the dam water on-site, the predicted schedule will
likely be weather dependant as increased warm, dry climatic conditions are more conducive
to dewatering by application to land than in wet, cold climates.
Water application to land would only be conducted under supervision assuming the
operational hours are 7am – 5pm weekdays. It is expected that pumping would only be
undertaken for a few hours each day to allow for soil infiltration, evaporation and UV
exposure.
It has been calculated on the recommended design irrigation rate and irrigation area is
suitable to receive 0.35ML per day. It is therefore estimated the entire dewatering process for
the combined 2.66ML of water will take approximately 8 days to complete. It is important to
note these calculations are based on estimates and modifications to the irrigation area and
actual water volume will impact the actual dewatering process.
It is acknowledged that the application rates during dam dewatering processes will be varied
on-site on a regular basis depending on current climatic conditions and observed rates of
infiltration rather than the design rates. Daily inspection of the irrigation process will be key in
ensuring appropriate application rates are obtained.
Key milestones in the dewatering process are:
Approval of the Dam Dewater and Sediment Assessment Rpeort;
Commencement of application of dam water to land;
Ongoing assessment of water quality being discharged;
Final water removal from dam; and
Excavation and inspection of dam sediments with sampling of materials for beneficial
reuse on-site if contamination is suspected.