GTE1544-VENM01 VENM INSPECTION MEMO Client: Hannas Job No: GTE1544 Project: Industrial Subdivision By: J.George Location: Lot 37 Prospect Highway, Pemulwuy Our Ref No: VENM01 Contact: Joel Hewitt Date: 3/04/2018 As requested, Ground Technologies undertook a sampling and testing of the western batter soil material contained within lot 37, Prospect Highway Pemulwuy. The site is being developed as an industrial estate and approximately 40,000m 3 of material will need to be excavated and disposed off site for the proposed development works. 1. Introduction In January 2018, PSM consultants carried out a geotechnical investigation of the QuarryWest Estate (Geotechnical Report-PSM3528-001L REV1). This site was part of the Boral Quarry in the past and their offices were located on the building pad till 2014. As part of the investigation seven (7) trenches were excavated up to a depth of 0.5m on the batters below approximately 101 RL. These trenches were still exposed at the time of our site investigation on 20 th March 2018. An inspection of the exposed trenches was conducted as part of this investigation and one sample was retrieved from each of the trenches. The proposed site location is given in Figure 1 and the areas of the exposed trenches are marked in Figure 2. Figure 1- Site Location 2. Site History Aerial photographs indicate the site was previously part of the Quarry site and an office building/warehouse and two smaller buildings were located on the existing building pad. The site of the excavated trenches (batter) was located to the west of the site structures. From the aerial photographs on the following pages, it is GROUND TECHNOLOGIES Geotechnical . Environmental . Laboratories Ground Technologies Pty Ltd ABN 25 089 213 294 19 Bernera Road, Prestons NSW 2170 PO Box 1121 Green Valley NSW 2168 Ph: (02) 8783 8200 Fax: (02) 8783 8210 Email: [email protected]
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Location: Lot 37 Prospect Highway, Pemulwuy Our Ref No: VENM01
Contact: Joel Hewitt Date: 3/04/2018
As requested, Ground Technologies undertook a sampling and testing of the western batter soil material contained within lot 37, Prospect Highway Pemulwuy. The site is being developed as an industrial estate and approximately 40,000m3 of material will need to be excavated and disposed off site for the proposed development works.
1. Introduction In January 2018, PSM consultants carried out a geotechnical investigation of the QuarryWest Estate (Geotechnical Report-PSM3528-001L REV1). This site was part of the Boral Quarry in the past and their offices were located on the building pad till 2014. As part of the investigation seven (7) trenches were excavated up to a depth of 0.5m on the batters below approximately 101 RL. These trenches were still exposed at the time of our site investigation on 20th March 2018. An inspection of the exposed trenches was conducted as part of this investigation and one sample was retrieved from each of the trenches. The proposed site location is given in Figure 1 and the areas of the exposed trenches are marked in Figure 2.
Figure 1- Site Location
2. Site History Aerial photographs indicate the site was previously part of the Quarry site and an office building/warehouse and two smaller buildings were located on the existing building pad. The site of the excavated trenches (batter) was located to the west of the site structures. From the aerial photographs on the following pages, it is
GROUND TECHNOLOGIES
Geotechnical . Environmental . Laboratories
Ground Technologies Pty Ltd ABN 25 089 213 294 19 Bernera Road, Prestons NSW 2170 PO Box 1121 Green Valley NSW 2168 Ph: (02) 8783 8200 Fax: (02) 8783 8210 Email: [email protected]
GTE1544-VENM01
understood that the buildings on site were demolished sometime in 2014. It is understood that these buildings were on site for a long time as part of the quarry.
Figure 2 – Aerial Photograph of Site (2009)
Figure 3 – Aerial Photograph of Site (2013)
Figure 4 – Aerial Photograph of Site (2015)
GTE1544-VENM01
3. Assessment of Acid Sulphate Soils Data from the Department of Land and Water Conservation indicates that the subject site is situated in a region with no known occurrence of acid sulfate soils. Furthermore, no alluvial soils were encountered during the investigation.
4. Site Observations & Subsurface Investigation The exposed trenches were located on the western batters dipping towards the east. The existing geometry of the western batters are located within the area to the west of the existing building pad with a relatively flat slope above RL101m and a steep cut batter at approximately 45 degrees below this elevation.
Figure 5 – Location of excavated trenches
An inspection of the existing trenches exposed the following main soil profiles;
Geological units observed in the subsurface profile are listed in Table 1; the trenches are marked the same as given in the PSM report to keep it uniform. There are three main soil profiles which are given below;
Table 1 – Geological Units
Unit Soil Profile TP0(RL)
TP1(RL) TP2(RL) TP2A(RL) TP3(RL) TP4(RL) TS5(RL) A Natural Clayey
Sand, orange/brown,
101.20 101.16 101.36 101.36 101.36 98.81 95.80
B Extremely to slightly weathered Dolerite,(boulders), brown;
96.49 96.74 96.91 96.46 98.53 95.80 93.88
C Dolerite, grey to dark grey and green
92.83 93.4 - - - - -
End of Trench(Toe of the batter)
91.20 91.20 91.40 91.40 91.40 91.20 91.20
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5. Laboratory Analysis - Contamination Whilst the potential for site contamination was low, limited laboratory screening testing was undertaken as a part of this investigation. The Assessment criteria used in this investigation have been obtained from the National Environment Protection (Assessment of Site Contamination) Measure (NEPM, 2013). This document presents risk-based Health Investigation Levels based on a variety of exposure settings for a number of organic and inorganic contaminants. To assess the risk to human health the results of the laboratory analysis are compared against the Health Investigation Levels (HIL) for the exposure setting; ‘standard residential with garden/accessible soil’ (‘A’). Test results are tabulated and presented below (Table 1) along with the relevant assessment criteria. Laboratory test certificates (ES1808431) are located in Appendix A.
Table 1: Laboratory Test Results – VENM Material
Chemicals and other attributes
Sample Number NEPM Health Investigation Level HILs (D)
6. Laboratory Analysis – Salinity / Aggressivity Seven (7) screening tests were collected as a part of this assessment in order to gain a view on the risk of saline soils. This assessments is based on the booklet “Site Investigations for Urban Salinity” published by Department of Land and Water Conservation 2002, AS2870 Residential Slabs and Footings and AS2159:2009 Piling – Design and Installation Guidelines
Table 2: Analysis of the Soil Samples (Salinity) Sample EC
µS/cm Texture Factor ECe Salinity Class
E1 17 10 0.17 Non Saline
E2 17 10 0.17 Non Saline
E3 20 10 0.20 Non Saline
E4 18 10 0.18 Non Saline
E5 24 10 0.24 Non Saline
E6 30 10 0.30 Non Saline
E7 41 10 0.41 Non Saline
Table 11: Analysis of the Soil Samples (Aggressiveness)
Sample pH Chloride Sulphate Resistivity Aggressivity to Concrete
Aggressivity to Steel pH Units mg/kg mg/kg Ohm.cm
E1 7.2 <10 <10 58800 Non Aggressive Non Aggressive E2 7.4 <10 <10 58800 Non Aggressive Non Aggressive E3 7.7 <10 <10 50000 Non Aggressive Non Aggressive E4 7.7 <10 <10 55600 Non Aggressive Non Aggressive E5 7.6 10 <10 41700 Non Aggressive Non Aggressive E6 7.6 10 <10 33300 Non Aggressive Non Aggressive E7 7.5 10 <10 24400 Non Aggressive Non Aggressive
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7. Conclusion
Based on visual observations and laboratory analysis, the material from the exposed trenches appears to be naturally occurring and free from foreign material as no suspicious odours or obvious signs of contamination were observed. Hence the material on the above site is classified as virgin excavated natural material (VENM) for future use; since it is in accordance with the definition of VENM given under the Protection of the Environments Operations Act 1997 as outlined below: ‘Natural material (such as clay, gravel, sand, soil or rock fines):
• That has been excavated or quarried from areas that are not contaminated with manufactured chemicals or process residues, as a result of industrial, commercial, mining or agricultural activities, and
• That does not contain any sulfidic ores or soils or any other waste.’ The electrical conductivity results indicate that the soil salinity is non saline. The laboratory test values of sulphates, chlorides and pH indicate that the soil is non aggressive to both steel and concrete. For and on behalf of Ground Technologies Pty Ltd
Reviewed By
J.George A.Bennett Environmental Engineer Principal Geotechnical Engineer
Attachment: Certificate of Analysis ES1808431
GTE1544-VENM01
APPENDIX A LABORATORY TEST RESULTS
0 0.00 True
Environmental
CERTIFICATE OF ANALYSISWork Order : Page : 1 of 9ES1808431
:: LaboratoryClient GROUND TECHNOLOGIES Environmental Division Sydney
: :ContactContact MR ANTHONY BENNETT Customer Services ES
:: AddressAddress 16 Weld Street
PRESTONS NSW, AUSTRALIA 2170
277-289 Woodpark Road Smithfield NSW Australia 2164
:Project GTE1544, Greystanes Date Samples Received : 20-Mar-2018 11:45
:Order number Date Analysis Commenced : 22-Mar-2018
:C-O-C number ---- Issue Date : 29-Mar-2018 10:55
Sampler : JASMINE GEORGE
Site : ----
Quote number : EN/222/17
7:No. of samples received
7:No. of samples analysed
This report supersedes any previous report(s) with this reference. Results apply to the sample(s) as submitted. This document shall not be reproduced, except in full.
This Certificate of Analysis contains the following information:
l General Comments
l Analytical Results
l Surrogate Control Limits
Additional information pertinent to this report will be found in the following separate attachments: Quality Control Report, QA/QC Compliance Assessment to assist with
Quality Review and Sample Receipt Notification.
SignatoriesThis document has been electronically signed by the authorized signatories below. Electronic signing is carried out in compliance with procedures specified in 21 CFR Part 11.
Signatories Accreditation CategoryPosition
Ankit Joshi Inorganic Chemist Sydney Inorganics, Smithfield, NSW
Edwandy Fadjar Organic Coordinator Sydney Inorganics, Smithfield, NSW
Edwandy Fadjar Organic Coordinator Sydney Organics, Smithfield, NSW
Raymond Commodore Instrument Chemist Sydney Inorganics, Smithfield, NSW
R I G H T S O L U T I O N S | R I G H T P A R T N E R
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General Comments
The analytical procedures used by the Environmental Division have been developed from established internationally recognized procedures such as those published by the USEPA, APHA, AS and NEPM. In house
developed procedures are employed in the absence of documented standards or by client request.
Where moisture determination has been performed, results are reported on a dry weight basis.
Where a reported less than (<) result is higher than the LOR, this may be due to primary sample extract/digestate dilution and/or insufficient sample for analysis.
Where the LOR of a reported result differs from standard LOR, this may be due to high moisture content, insufficient sample (reduced weight employed) or matrix interference.
When sampling time information is not provided by the client, sampling dates are shown without a time component. In these instances, the time component has been assumed by the laboratory for processing
purposes.
Where a result is required to meet compliance limits the associated uncertainty must be considered. Refer to the ALS Contact for details.
CAS Number = CAS registry number from database maintained by Chemical Abstracts Services. The Chemical Abstracts Service is a division of the American Chemical Society.
LOR = Limit of reporting
^ = This result is computed from individual analyte detections at or above the level of reporting
ø = ALS is not NATA accredited for these tests.
~ = Indicates an estimated value.
Key :
Benzo(a)pyrene Toxicity Equivalent Quotient (TEQ) is the sum total of the concentration of the eight carcinogenic PAHs multiplied by their Toxicity Equivalence Factor (TEF) relative to Benzo(a)pyrene. TEF values
are provided in brackets as follows: Benz(a)anthracene (0.1), Chrysene (0.01), Benzo(b+j) & Benzo(k)fluoranthene (0.1), Benzo(a)pyrene (1.0), Indeno(1.2.3.cd)pyrene (0.1), Dibenz(a.h)anthracene (1.0),
Benzo(g.h.i)perylene (0.01). Less than LOR results for 'TEQ Zero' are treated as zero, for 'TEQ 1/2LOR' are treated as half the reported LOR, and for 'TEQ LOR' are treated as being equal to the reported LOR.
Note: TEQ 1/2LOR and TEQ LOR will calculate as 0.6mg/Kg and 1.2mg/Kg respectively for samples with non-detects for all of the eight TEQ PAHs.
l
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Analytical Results
E5E4E3E2E1Client sample IDSub-Matrix: SOIL
(Matrix: SOIL)
20-Mar-2018 00:0020-Mar-2018 00:0020-Mar-2018 00:0020-Mar-2018 00:0020-Mar-2018 00:00Client sampling date / time