soil contamination risk stage 2 detailed site investigation report … · 2020. 9. 23. · this...

Malloch Environmental Ltd 801 East Maddisons Road, Rolleston 7614

021 132 0321

[email protected]

Asbestos Surveys • Soil Contamination Investigations • Environmental Planning

Soil Contamination Risk Stage 2 – Detailed Site Investigation Report

17 Branthwaite Drive Rolleston

March 2017

DSI – 17 Branthwaite Dr, Rolleston

Malloch Environmental Ltd

CONTENTS

1 Executive Summary ......................................................................................................................... 3

2 Objectives of the Investigation ....................................................................................................... 3

3 Scope of Work Undertaken ............................................................................................................. 3

4 Site Identification ............................................................................................................................ 4

5 Summary of Site Description, History and PSI ................................................................................ 5

6 Geology and Hydrology ................................................................................................................... 5

7 Basis for Soil Guideline Values (SGV) .............................................................................................. 6

7.1 Activity Description ............................................................................................................. 6

7.2 Zoning .................................................................................................................................. 6

7.3 Soil Guideline Values ........................................................................................................... 6

8 Sampling and Analysis Plan and Sampling Methodology ............................................................... 7

9 Field Quality Assurance and Quality Control .................................................................................. 7

10 Laboratory Quality Assurance and Quality Control ........................................................................ 7

11 XRF Quality Assurance Measures .................................................................................................... 7

12 Results Analysis and Summary ........................................................................................................ 8

13 Site Characterisation and Recommendation .................................................................................. 8

14 NES Planning Status ........................................................................................................................ 9

15 Conclusion ....................................................................................................................................... 9

16 Limitations..................................................................................................................................... 10

APPENDICES

A Sample Location Plans B Table of XRF Results C Table of Laboratory Results D Laboratory Reports



1 Executive Summary

The subject site involves a single lot with the street address 17 Branthwaite Drive, Rolleston, Canterbury. It is proposed to subdivide the site, as part of a larger subdivision, into residential lots. This will result in a change of use and disturbance of soils. The Resource Management (National Environmental Standard for Assessing and Managing Contaminants in Soil to Protect Health) Regulations 2011 (NES) require an assessment of the likelihood of soil contamination being present. This report details the work undertaken to assess that risk. A Preliminary Site Investigation (PSI) was produced by Malloch Environmental Ltd in October 2016 for the 58Ha proposed subdivision. An additional 3 lots were added in Revision 1 of the PSI produced in March 2017. The PSI revealed that that the majority of the combined total site had been used for general pastoral use and was unlikely to have been used in a manner that would have resulted in soil contamination. However, the area around the original former homestead and associated outbuildings, on 17 Branthwaite Dr, is likely to have had lead-based paint products used on the older and former buildings, and potentially hazardous substances may have been used and stored in and around the sheds associated with the general historic working yard area associated with the dwelling. These are confirmed HAIL activities and could pose a risk to human health if used for a residential use. It was recommended that a Detailed Site Investigation, in terms of the Ministry for the Environments Contaminated Land Management Guidelines, be undertaken on the identified risk area before development of the site for a residential use, which forms the basis of this report. The investigations have shown that the subject site has some minor cadmium, copper, lead and zinc contamination across the former farm working yard area, however this contamination is below the residential 10% produce SGVs. There is an isolated cadmium exceedance at 300mm depth at sample location SS7, but this is small, isolated and not considered to pose a risk to human health. It is considered that the site is suitable for subdivision and development for residential and recreational use with no further investigations required. In terms of planning status at the time of writing of this report, the NES does apply and a resource consent is required as a controlled activity before subdivision and development for residential use.

2 Objectives of the Investigation

This report has been prepared in accordance with the Ministry for the Environment’s “Contaminated Land Management Guidelines No 1: Reporting on Contaminated Sites in New Zealand”. This report includes all requirements for a Stage 2 Detailed Site Investigation Report. The objectives have included determining whether the activities that have been carried out in the past have caused soil contamination that would pose a risk to human health and determining the extent and type of any contamination.

3 Scope of Work Undertaken

The scope of the work undertaken has included:

• Summary of the Malloch Environmental Ltd PSI Report dated October 2016 and March 2017 revision

• Site visit to undertake soil sampling & XRF measurement

• Analysis of results in accordance with MfE Guidelines

• Preparation of report in accordance with MfE guidelines



4 Site Identification

The site is located at 17 Branthwaite Drive, Rolleston, Canterbury as shown on the plan in Figure 1 below. The site is legally described as Lot 7 DP 66535 Blk III LEESTON SD and has a total area of approximately 4.0860 Ha.

Figure 1 – Location Plan

N

N

Lot 7 DP 66535



5 Summary of Site Description, History and PSI

The subject site is generally flat rural residential land to the south-east of the township of Rolleston. There is a dwelling and associated sheds on the northern part of the site. The rest of the site is in pasture and the site is clearly defined by existing hedges and fences. It is bounded by similar rural residential properties and farmland on all sides. The township of Rolleston lies approximately 1km to the north-west A Preliminary Site Investigation (PSI) was produced by Malloch Environmental Ltd in October 2016, and revised in March 2017 for a wider area including 18 adjacent lots. The PSI revealed that that the original farmhouse for the underlying historic farm block was sited adjacent to the northern boundary of the subject site. The associated outbuildings and farm working yard were located on the subject site, in the north-eastern corner where the current dwelling is located. There is a strong likelihood that lead-based paint products were used on the older former buildings, and potentially hazardous substances may have been used and stored in and around the sheds associated with the general historic working yard area associated with the former dwelling. These are confirmed HAIL activities and could pose a risk to human health if used for a residential use. It was recommended that a Detailed Site Investigation, in terms of the Ministry for the Environments Contaminated Land Management Guidelines, be undertaken on the identified risk area before development of the site for a residential use, which forms the basis of this report. The risk area plan is shown in Figure 2 below:

Figure 2 – Area of risk recommended to be further investigated

6 Geology and Hydrology

The ECan GIS describes the soils as Templeton moderately deep silty loam. Wells in the area indicate that topsoils are underlain by silty and claybound gravels. Soil trace elements are ‘Regional, Recent’. The site lies over the unconfined/semi-confined gravel aquifer system. Ground water levels recorded on nearby bore logs are between 11 and 14m deep. The direction of ground water flow is generally in a south-easterly direction. There are no open drains or surface water features on the site. The nearest down gradient well is approximately 250m to the south-east.

= Area of Risk



The nearest downgradient community supply well is approximately 3.7 km to the south-east. An open water race runs approximately 900m to the south-west, along Springston Rolleston Rd.

7 Basis for Soil Guideline Values (SGV)

7.1 Activity Description

This report has been written for the following proposed activities:

• Subdivision and development of the land for residential use,

• Earth disturbing activities associated with the above use and development of the site.

7.2 Zoning

The subject site is currently zoned Residential Living Z.

7.3 Soil Guideline Values

Human health soil contaminant standards for a group of 12 priority contaminants were derived under a set of five land-use scenarios, and are legally binding under The Resource Management (National Environmental Standard for Assessing and Managing Contaminants in Soil to Protect Health) Regulations 2011 (NES). These standards have been applied where applicable. For contaminants other than the 12 priority contaminants, the hierarchy as set out in the Ministry for the Environment Contaminated Land Management Guidelines No 2 has been followed. For soil, guideline values are predominantly risk based, in that they are typically derived using designated exposure scenarios that relate to different land uses. For each exposure scenario, selected pathways of exposure are used to derive guideline values. These pathways typically include soil ingestion, inhalation and dermal adsorption. The guideline values for the appropriate land use scenario relate to the most critical pathway. The NES land-use scenarios applicable for the proposed use of this site include ‘residential 10% produce’ and ‘recreational’, as the site is proposed to be partly a future residential section, and partly a recreation reserve. See Figure 3 showing an excerpt from the proposed subdivision plan with the approximate investigation area overlaid. The ‘commercial/outdoor workers’ land scenario is used as a proxy value for protection of workers disturbing the soil.

Figure 3 – Investigation area on proposed subdivision layout

All results have been compared with human health and ecological guideline values as well as the background values for the “Regional Recent” soil type where available.



The tables of results attached in Appendix C include the guideline values used and references to the documents used.

8 Sampling and Analysis Plan and Sampling Methodology

An initial systematic sampling methodology was used to sample the area identified as having a risk of soil contamination. Seven sample locations were sampled in a grid of approximately 20m in the northern part of the lot. On the 19th October, 2016 soil samples were taken from surface soils (0-50mm) and 300mm depth at each of the seven sample locations in the area of concern, as well as being tested by XRF. Fifteen samples (including one duplicate for QA purposes) were submitted to Hill Laboratory, with testing requests based on the XRF results. Five samples, including the duplicate, were tested for seven heavy metals. An additional two samples were tested for arsenic and cadmium. It was noted that an amount of debris was encountered at depth at sample locations SS4 and SS7, including ash, crockery, machinery components and electrical parts. After receiving the initial results indicating a cadmium exceedence in the proposed residential lot, further sampling was undertaken. Three additional samples (SS8 – SS10) were taken at surface (50mm) and 300mm depth on 27th February, 2017, and submitted to Hill Laboratory to be tested for seven heavy metals. See Appendix A for the Sample Location Plan.

9 Field Quality Assurance and Quality Control

The Contaminated Land Management Guidelines No 5, Ministry for the Environment was followed for all aspects of the investigation. Field quality control procedures included taking blind replicates and ensuring decontamination procedures were followed. Samples were taken using a stainless-steel trowel or fresh disposable nitrile gloves. All equipment was decontaminated between samples using Decon 90 and rinsed with tap water. Samples were collected in laboratory supplied containers and immediately placed in chilled bins. Following sampling, the samples were delivered to Hill Laboratory under chain-of-custody documentation.

10 Laboratory Quality Assurance and Quality Control

All samples were submitted to Hill Laboratories in Christchurch. Hill Laboratories hold IANZ accreditation. As part of holding accreditation the laboratory follows appropriate testing and quality control procedures. No quality control issues were identified.

11 XRF Quality Assurance Measures

The XRF used was a Thermo Scientific Niton XL2 GOLDD. The manufacturer’s instructions were followed in the use of the device. Calibration samples were tested prior to each day’s testing and compared with the manufacturers specifications, and silicon blank readings were taken approximately every 20 samples to ensure there was no contamination of the XRF window. The US EPA Method 6200 - Field Portable X-ray Fluorescence Spectrometry for the Determination of Elemental Concentrations in Soil and Sediment (2007) was used as guidance for the use of the XRF and quality assurance measures. This method recommends that 5% of



XRF tests should be verified through lab testing. Approximately 50% of the samples were laboratory tested for seven heavy metals and 70% for cadmium. A regression analysis was not carried out due to thigh number of samples lab tested. The XRF results are relied on for only three locations (SS1, SS2 and SS5), where readings were below the limit of detection, or close to background concentrations, and the soils had no signs of the debris seen at the other locations further to the southwest.

12 Results Analysis and Summary

The XRF results showed two sample locations of concern for lead. Sample location SS4 had a high lead concentration (560 mg/kg) for one of the three XRF readings taken at 300mm depth. The other two readings taken gave results below 100 mg/kg. This is consistent with the non-homogeneity of the soil at depth in this location, with a significant amount of debris mixed through the soils at depth. Laboratory testing of this sample returned a lead level of 158mg/kg. Sample location SS7 also had a significant amount of debris at depth and also had one XRF reading (181 mg/kg) which was near the residential 10% produce SGV, but once again the lab result of 93mg/kg showed levels were well under the residential 10% produce SGV. It is expected that the debris in the soils were affecting the XRF results. The lead levels at the site average about half of the residential 10% produce guideline value of 210mg/kg. The laboratory results showed only one exceedance of the residential SGV. The cadmium result for SS7.2, taken at 300mm depth, returned a result of 3.8 mg/kg, which is above the residential SGV of 3.0 mg/kg. All other samples tested at the laboratory for cadmium returned results near or over expected background levels of 0.19mg/kg, with levels generally in the range of 0.23 – 0.39 mg/kg. Laboratory testing of additional sample of locations around SS7 returned results well below residential SGVs. These additional three sample locations delineate the area to the south-east of SS7. The area to the north-west of SS7 was not sampled to delineate the extent of the cadmium contamination as this is proposed to be a recreational reserve area and it is considered highly unlikely that any contamination would exceed the recreational SGV of 400 mg/kg for cadmium. Cadmium, copper, lead and zinc results were above expected background levels for most of the samples tested, but were well below residential SGVs. Zinc results were above ecological receptor values at sample locations SS4 and SS7. The Table of XRF Results is shown in Appendix B and laboratory results shown in Appendix C. Copies of the Laboratory Reports are included in Appendix D.

13 Site Characterisation and Recommendation

There is one isolated area of soil contamination above residential SGVs on the site, at sample location SS7 at 300mm depth. All surface level soils have cadmium levels well below the residential 10% produce SGV. The rest of the area tested has elevated cadmium, copper, lead and zinc, most likely related to the historic use as a farm working yard. However, these contaminants are below residential SGVs and not considered to be a risk to human health. There is also an area of zinc contamination above ecological receptor values. As there are no nearby surface water bodies and ground water is at least 11m deep, the risk to ecology is considered to be low.



The following conceptual site model addresses the potential risks associated with the site:

Conceptual Site Model

Source Pathways Receptor Risk Assessment

Small, isolated area of cadmium contamination slightly above residential SGV at 300mm depth

Hu

man

Dermal contact, ingestion and inhalation

Future site occupiers / land users

Low risk to human health as contaminants are at 300mm depth, only slightly elevated over SGV and in an isolated area. Although the current house layout would likely mean the area is not used for produce growing, if it was, then that use would likely mix contaminants with surrounding soils and dilute the contaminant concentration to below residential SGV.

Workers involved in soil disturbance at the site

Very low risk to human health as contaminants tested are well below the commercial / outdoor worker SGVs.

Eco

logi

cal

Infiltration through soils to groundwater

Groundwater is 11 - 14m deep at the site

Very low risk as metals bind well to finer soils at surface and distance to groundwater is significant.

Surface runoff to waterways

Surface water ecology

Very low risk – there are no surface water features on site or nearby.

It is considered that the site is suitable for subdivision and development for residential and recreational use with no further investigations required.

14 NES Planning Status

In terms of the NES section 5 (7) states that the land is considered to be covered if an activity or industry described in the HAIL is being undertaken on it; or has been undertaken on it; or it is more likely than not that an activity is being or has been undertaken on it. The Preliminary Site Investigation found that the subject site has had a likely HAIL activity occurring in the past and subsequent investigations have confirmed that soil contamination is present above the applicable standard in regulation 7. Resource consent under the NES is required for the proposed subdivision and development of the site for residential use.

15 Conclusion

The investigations have shown that the subject site has some minor cadmium, copper, lead and zinc contamination across the former farm working yard area, however this contamination is below the residential 10% produce SGVs. There is an isolated cadmium exceedance at 300mm depth at sample location SS7, but this is small, isolated and not considered to pose a risk to



human health. It is considered that the site is suitable for subdivision and development for residential and recreational use with no further investigations required.

16 Limitations

Malloch Environmental Limited has performed services for this project in accordance with current professional standards for environmental site assessments, and in terms of the client’s financial and technical brief for the work. Any reliance on this report by other parties shall be at such party’s own risk. It does not purport to completely describe all the site characteristics and properties. Where data is supplied by the client or any third party, it has been assumed that the information is correct, unless otherwise stated. Malloch Environmental Limited accepts no responsibility for errors or omissions in the information provided. Should further information become available regarding the conditions at the site, Malloch Environmental Limited reserves the right to review the report in the context of the additional information. Opinions and judgments expressed in this report are based on an understanding and interpretation of regulatory standards at the time of writing and should not be construed as legal opinions. As regulatory standards are constantly changing, conclusions and recommendations considered to be acceptable at the time of writing, may in the future become subject to different regulatory standards which cause them to become unacceptable. This may require further assessment and/or remediation of the site to be suitable for the existing or proposed land use activities. There is no investigation that is thorough enough to preclude the presence of materials at the site that presently or in the future may be considered hazardous. No part of this report may be reproduced, distributed, publicly displayed, or made into a derivative work without the permission of Malloch Environmental Ltd, other than the distribution in its entirety for the purposes it is intended. Report written by:

Chris Peacock Environmental Engineer Report reviewed and certified by a suitably qualified and experienced practitioner as prescribed under the NES (soil):

Nicola Peacock, CEnvP Principal Environmental Engineer



Appendix A – Sample Location Plan

LEGEND

Soil sample location

Soil sample location that

exceeds the residential SGV

for cadmium at 300mm

Risk area identified in PSI

Notes: 1. This plan has been prepared for soil

contamination risk assessment

purposes only. No liability is accepted

if the plan is used for any other

purposes.

2. Any measurements taken from this

plan which are not dimensioned on

the electronic copy are at the risk of

the user.

3. Soil sample locations are approximate

only.

Malloch Environmental Ltd 801 East Maddisons Road, Rolleston

021 132 0321

[email protected]

Scale: NTS

Date: 19 October 2016

Drawing No: 01143/1

Sample Location Plan

17 Branthwaite Dr, Rolleston

SS3

SS3

N

SS2

SS3

SS5

SS7

0

SS6

SS1

SS4

SS10

SS9

SS8



Appendix B – Table of XRF Results

Table of XRF Results - 17 Branthwaite Dr, RollestonDate of testing: 19th October, 2016

Result Error Result Error Result Error Result Error Result Error

SS1.1 0 - 50mm 388 19/10/2016 9:32 61 <LOD 6.75 <LOD 16 14.3 5.83 <LOD 39.87 94 9.02

SS1.1 0 - 50mm 389 19/10/2016 9:33 60 <LOD 7.06 <LOD 16.38 16.7 6.08 <LOD 41.59 102 9.64

SS1.1 0 - 50mm 390 19/10/2016 9:35 60 <LOD 6.92 <LOD 15.92 18.2 6.06 <LOD 40.58 102 9.51

SS1.2 300mm 391 19/10/2016 9:40 60 <LOD 7.78 <LOD 19.37 11.1 6.59 <LOD 47.49 82 9.96

SS1.2 300mm 392 19/10/2016 9:41 60 <LOD 6.88 <LOD 17.06 <LOD 8.71 <LOD 43.25 88 9.34


SS2.1 0 - 50mm 394 19/10/2016 9:50 60 <LOD 7.68 <LOD 16.71 29.7 6.64 <LOD 42.3 94 9.32

SS2.1 0 - 50mm 395 19/10/2016 9:51 60 <LOD 7.62 <LOD 17.28 20.3 6.46 <LOD 43.86 99 9.86

SS2.1 0 - 50mm 396 19/10/2016 9:53 60 <LOD 7.81 <LOD 17.1 31.7 6.74 <LOD 42.94 85 9.13

SS2.2 300mm 397 19/10/2016 9:58 60 <LOD 10.91 <LOD 26.85 31.0 9.26 <LOD 63.45 105 13.62

SS2.2 300mm 398 19/10/2016 9:59 60 <LOD 10.88 <LOD 18.7 84.1 9.1 <LOD 47.7 104 10.53

SS2.2 300mm 399 19/10/2016 10:00 60 <LOD 8.69 <LOD 18.08 38.0 7.58 <LOD 47.49 96 10.33

SS3.1 0 - 50mm 400 19/10/2016 10:10 60 <LOD 8.26 <LOD 16.54 39.1 6.93 97.42 30.6 104 9.61

SS3.1 0 - 50mm 401 19/10/2016 10:12 60 12.8 5.9 <LOD 17.69 39.7 7.22 <LOD 44.91 113 10.37

SS3.1 0 - 50mm 402 19/10/2016 10:13 60 12.6 5.6 <LOD 15.86 43.7 6.87 49.43 28.33 116 9.75

SS3.2 300mm 403 19/10/2016 10:19 60 <LOD 11.31 <LOD 21.51 62.7 9.43 <LOD 52.69 143 13.42

SS3.2 300mm 404 19/10/2016 10:23 60 11.9 7.78 <LOD 20.87 71.2 9.65 <LOD 52.53 146 13.34

SS3.2 300mm 405 19/10/2016 10:25 60 <LOD 11.93 31 16.17 80.0 10.31 <LOD 56.51 158 14.25

SS4.1 0 - 50mm 406 19/10/2016 10:33 60 <LOD 11.63 22 12.06 127.1 9.87 <LOD 43.18 162 11.95

SS4.1 0 - 50mm 407 19/10/2016 10:34 60 <LOD 10.69 19 12 99.2 9.08 <LOD 44.17 135 11

SS4.1 0 - 50mm 408 19/10/2016 10:35 60 <LOD 10.22 <LOD 16.09 110.1 8.73 <LOD 40.89 166 11.11

SS4.3 300mm 409 19/10/2016 10:40 60 <LOD 22.88 32 13.69 559.7 19.3 <LOD 47.33 205 14.02

SS4.3 300mm 410 19/10/2016 10:41 61 <LOD 12.91 <LOD 23.02 99.3 10.96 <LOD 54.86 170 14.63

SS4.3 300mm 411 19/10/2016 10:43 60 <LOD 13.7 54 21.2 69.8 11.61 <LOD 67.86 164 16.99

SS5.1 0 - 50mm 413 19/10/2016 10:53 60 <LOD 8.55 <LOD 21.86 15.5 7.3 <LOD 51.76 64 9.98

SS5.1 0 - 50mm 414 19/10/2016 10:54 60 <LOD 7.64 <LOD 19.04 12.1 6.47 <LOD 47.57 67 9.07

SS5.1 0 - 50mm 415 19/10/2016 10:56 60 <LOD 7.39 <LOD 19.58 10.2 6.41 <LOD 48.27 54 8.55


SS5.2 300mm 417 19/10/2016 11:03 60 <LOD 7.75 <LOD 18.14 16.2 6.74 <LOD 47.61 73 9.52

SS5.2 300mm 418 19/10/2016 11:04 60 <LOD 7.77 <LOD 19.77 10.6 6.66 <LOD 48.14 76 9.8

SS6.1 0 - 50mm 419 19/10/2016 11:11 60 <LOD 9.96 <LOD 16.18 93.6 8.44 <LOD 41.76 164 11.23

SS6.1 0 - 50mm 420 19/10/2016 11:12 60 <LOD 10.3 <LOD 16.92 95.4 8.73 <LOD 43.27 161 11.49

SS6.1 0 - 50mm 421 19/10/2016 11:14 60 <LOD 9.6 <LOD 15.24 88.8 8.18 <LOD 40.24 151 10.71

SS6.2 300mm 422 19/10/2016 11:22 60 13.6 7.48 <LOD 15.71 134.6 9.35 <LOD 40.84 138 10.29

SS6.2 300mm 423 19/10/2016 11:23 60 <LOD 8.96 <LOD 15.07 73.4 7.69 64.83 28.34 133 10.07

SS6.2 300mm 424 19/10/2016 11:24 60 <LOD 8.83 <LOD 16.45 54.2 7.5 <LOD 42.85 123 10.29

SS7.1 0 - 50mm 425 19/10/2016 11:34 60 <LOD 8.9 <LOD 18.6 40.1 7.52 <LOD 46.65 118 10.97

SS7.1 0 - 50mm 426 19/10/2016 11:35 60 <LOD 9.04 <LOD 18.13 52.6 7.87 <LOD 46.68 128 11.22

SS7.1 0 - 50mm 427 19/10/2016 11:36 60 <LOD 10.06 <LOD 17.1 88.4 8.52 <LOD 43.45 155 11.3

SS7.2 300mm 428 19/10/2016 11:43 61 <LOD 12.29 <LOD 21.12 100.2 10.4 <LOD 51.82 343 18.74

SS7.2 300mm 429 19/10/2016 11:45 60 <LOD 20.81 <LOD 37.27 180.9 18.28 <LOD 84.39 191 21.04

SS7.2 300mm 430 19/10/2016 11:46 60 <LOD 10.16 <LOD 17.72 86.4 8.76 <LOD 45.47 238 14.08

All results mg/kg

Result exceeds

residential SGV

Soil Guideline

valuesReference NES NES

Sample ID (Lab tested samples

in BOLD)

Sample

Depth

XRF

Reading NoDate & Time

Test

Duration

(secs)

7,400

Outdoor Worker 70 >10,000 3,300 1,800

210

400,000

Residential 10% produce >10,000

Total

Recoverable

Arsenic

EAUK NEPM

Total

Recoverable Zinc

Total

Recoverable

Copper

Total

Recoverable Lead

Total

Recoverable

Nickel

NES

20 130



Appendix C – Table of Laboratory Results

Table of Laboratory Results - Branthwaite DrDate of testing: 19th October, 2016 & 27th February, 2017

Analyte Sample Name: SS3.1 SS3.2 SS4.1 SS4.2 SS4.3 SS6.1 SS6.2 SS7.1 SS7.2 SS8.1 SS8.2 SS9.1 SS9.2 SS10.1 SS10.2RPD

Values

Soil Results Lab Number: 1667103.5 1667103.6 1667103.7 1667103.8 1667103.9 1667103.1 1667103.1 1667103.1 1667103.2 1730765.1 1730765.2 1730765.3 1730765.4 1730765.5 1730765.6

Depth: 0 - 50mm 300mm 0 - 50mm 300mm 300mm 0 - 50mm 300mm 0 - 50mm 300mm 0 - 50mm 300mm 0 - 50mm 300mm 0 - 50mm 300mm

Total Recoverable Arsenic mg/kg dry wt 4 4 6 6 5 - 4 - 4 3 4 4 4 4 4 0% 20 80 70 NES 17 CCME 12.58

Total Recoverable Cadmium mg/kg dry wt 0.23 0.31 0.37 0.39 0.27 0.28 0.29 0.25 3.80 < 0.10 0.19 0.31 0.35 < 0.10 0.22 5% 3.00 400.00 1,300 NES 10 CCME 0.19

Total Recoverable Chromium mg/kg dry wt - - 18 19 17 - 15 - 16 12 16 16 17 13 16 6% 460 2,700 6,300 NES 64 CCME 22.7

Total Recoverable Copper mg/kg dry wt - - 30 32 31 - 15 - 25 9 9 13 18 6 10 7% >10,000 >10000 >10,000 NES 63 CCME 20.3

Total Recoverable Lead mg/kg dry wt - - 157 160 158 - 80 - 93 23 135 69 105 22 57 2% 210 880 3,300 NES 300 CCME 40.96

Total Recoverable Nickel mg/kg dry wt - - 14 13 16 - 11 - 11 9 11 10 11 10 12 7% 130 1,200 1,800 EAUK 50 CCME 20.7

Total Recoverable Zinc mg/kg dry wt - - 210 210 210 - 129 - 1,410 62 126 121 147 58 105 0% 7,400 30,000 400,000 NEPM 200 CCME 93.94

Analyte Sample Name: RW1

Aqueous Results (Rinse Water) Lab Number: 1667103.2

Heavy Metals

Total Arsenic g/m³ < 0.0011

Total Cadmium g/m³ < 0.000053

Total Chromium g/m³ 0.00124

Total Copper g/m³ 0.0158

Total Lead g/m³ 0.00093

Total Nickel g/m³ < 0.00053

Total Zinc g/m³ 0.009

NES - National Environmental Standard for Assessing and Managing Contaminants in Soils, MfE

NEPM - National Environmental Protection Measures 2013, Formerly NEPC, Australia

EAUK - Soil guideline values for nickel - Environment Agency UK 2009

CCME - Canadian Environmental Quality Guidelines, CCME (updated 2012)

1 Concentrations for "Recent Regional" soil group from Background concentrations of selected Level 2 trace elements in Canterbury soils, Tonkin and Taylor, July 2007

Indicates result exceeds background value for soil type

Indicates result exceeds ecological guideline value

Indicates result exceeds residential soil guideline value

Heavy Metals

Soil Guideline values

Residential

10% Produce

Commercial/

Outdoor

Worker ReferenceEcological

receptors Reference Background1

SS4.1 &

SS4.2Recreational



Appendix D – Laboratory Reports

R J Hill Laboratories Limited1 Clyde StreetPrivate Bag 3205Hamilton 3240, New Zealand

+64 7 858 2000+64 7 858 [email protected]

TelFaxEmailWeb

This Laboratory is accredited by International Accreditation New Zealand (IANZ), which represents New Zealand in

the International Laboratory Accreditation Cooperation (ILAC). Through the ILAC Mutual Recognition Arrangement

(ILAC-MRA) this accreditation is internationally recognised.

The tests reported herein have been performed in accordance with the terms of accreditation, with the exception of

tests marked *, which are not accredited.

A N A L Y S I S R E P O R T Page 1 of 2

Client:

Contact: Nicola Peacock

C/- Malloch Environmental Limited

801 East Maddisons Road

Rolleston 7614

Malloch Environmental Limited Lab No:

Date Received:

Date Reported:

Quote No:

Order No:

Client Reference:

Submitted By:

1667103

19-Oct-2016

03-Nov-2016

72157

Branthwaite

Chris Peacock

SPv2

Results for cadmium have been added to samples 1667103.12 & 14 at the

request of the client.Amended Report This report replaces an earlier report issued on the 26 Oct 2016 at 4:36 pm

Sample Type: Soil

Sample Name:

Lab Number:

SS3.1

19-Oct-2016

10:02 am

SS3.2

19-Oct-2016

10:08 am

SS4.2

19-Oct-2016

10:23 am

SS4.3

19-Oct-2016

10:27 am

1667103.5 1667103.6 1667103.7 1667103.8 1667103.9

SS4.1

19-Oct-2016

10:23 am

Individual Tests

mg/kg dry wt 4 4 - - -Total Recoverable Arsenic

mg/kg dry wt 0.23 0.31 - - -Total Recoverable Cadmium

Heavy Metals, Screen Level

mg/kg dry wt - - 6 6 5Total Recoverable Arsenic

mg/kg dry wt - - 0.37 0.39 0.27Total Recoverable Cadmium

mg/kg dry wt - - 18 19 17Total Recoverable Chromium

mg/kg dry wt - - 30 32 31Total Recoverable Copper

mg/kg dry wt - - 157 160 158Total Recoverable Lead

mg/kg dry wt - - 14 13 16Total Recoverable Nickel

mg/kg dry wt - - 210 210 210Total Recoverable Zinc

Sample Name:

Lab Number:

SS6.1

19-Oct-2016

11:00 am

SS6.2

19-Oct-2016

11:07 am

SS7.2

19-Oct-2016

11:30 am

1667103.12 1667103.13 1667103.14 1667103.15

SS7.1

19-Oct-2016

11:20 am

Individual Tests

mg/kg dry wt 0.28 - 0.25 - -Total Recoverable Cadmium


mg/kg dry wt - 4 - 4 -Total Recoverable Arsenic

mg/kg dry wt - 0.29 - 3.8 -Total Recoverable Cadmium

mg/kg dry wt - 15 - 16 -Total Recoverable Chromium

mg/kg dry wt - 15 - 25 -Total Recoverable Copper

mg/kg dry wt - 80 - 93 -Total Recoverable Lead

mg/kg dry wt - 11 - 11 -Total Recoverable Nickel

mg/kg dry wt - 129 - 1,410 -Total Recoverable Zinc

Sample Type: Aqueous

Sample Name:

Lab Number:

RW1 19-Oct-2016

11:32 am

1667103.16

Heavy metals, totals, trace As,Cd,Cr,Cu,Ni,Pb,Zn

g/m3 < 0.0011 - - - -Total Arsenic

g/m3 < 0.000053 - - - -Total Cadmium

g/m3 0.00124 - - - -Total Chromium

g/m3 0.0158 - - - -Total Copper

g/m3 0.00093 - - - -Total Lead


Sample Name:

Lab Number:

RW1 19-Oct-2016

11:32 am

1667103.16

Heavy metals, totals, trace As,Cd,Cr,Cu,Ni,Pb,Zn

g/m3 < 0.00053 - - - -Total Nickel

g/m3 0.0090 - - - -Total Zinc

Lab No: 1667103 v 2 Hill Laboratories Page 2 of 2

The following table(s) gives a brief description of the methods used to conduct the analyses for this job. The detection limits given below are those attainable in a relatively clean matrix.

Detection limits may be higher for individual samples should insufficient sample be available, or if the matrix requires that dilutions be performed during analysis.

S U M M A R Y O F M E T H O D S

Sample Type: Soil

Test Method Description Default Detection Limit Sample No

5-6, 12, 14Environmental Solids SamplePreparation

Air dried at 35°C and sieved, <2mm fraction.Used for sample preparation.May contain a residual moisture content of 2-5%.

-

7-9, 13, 15Heavy Metals, Screen Level Dried sample, < 2mm fraction. Nitric/Hydrochloric aciddigestion US EPA 200.2. Complies with NES Regulations. ICP-MS screen level, interference removal by Kinetic EnergyDiscrimination if required.

0.10 - 4 mg/kg dry wt

5-6, 12, 14Total Recoverable digestion Nitric / hydrochloric acid digestion. US EPA 200.2. -

5-6Total Recoverable Arsenic Dried sample, sieved as specified (if required).Nitric/Hydrochloric acid digestion, ICP-MS, screen level. USEPA 200.2.

2 mg/kg dry wt

5-6, 12, 14Total Recoverable Cadmium Dried sample, sieved as specified (if required).Nitric/Hydrochloric acid digestion, ICP-MS, screen level. USEPA 200.2.

0.10 mg/kg dry wt



16Heavy metals, totals, traceAs,Cd,Cr,Cu,Ni,Pb,Zn

Nitric acid digestion, ICP-MS, trace level. APHA 3125 B 22nd

ed. 2012 / US EPA 200.8

0.000053 - 0.0011 g/m3

16Total Digestion Nitric acid digestion. APHA 3030 E 22nd ed. 2012 (modified). -

These samples were collected by yourselves (or your agent) and analysed as received at the laboratory.

Samples are held at the laboratory after reporting for a length of time depending on the preservation used and the stability ofthe analytes being tested. Once the storage period is completed the samples are discarded unless otherwise advised by theclient.

This report must not be reproduced, except in full, without the written consent of the signatory.

Carole Rodgers-Carroll BA, NZCS

Client Services Manager - Environmental

R J Hill Laboratories Limited1 Clyde Street Hamilton 3216Private Bag 3205Hamilton 3240 New Zealand

0508 HILL LAB (44 555 22)+64 7 858 [email protected]

TTEW

This Laboratory is accredited by International Accreditation New Zealand (IANZ), which represents New Zealand in

the International Laboratory Accreditation Cooperation (ILAC). Through the ILAC Mutual Recognition Arrangement

(ILAC-MRA) this accreditation is internationally recognised.

The tests reported herein have been performed in accordance with the terms of accreditation, with the exception of

tests marked *, which are not accredited.

A N A L Y S I S R E P O R T Page 1 of 2

Client:

Contact: Nicola Peacock

C/- Malloch Environmental Limited

801 East Maddisons Road

Rolleston 7614

Malloch Environmental Limited Lab No:

Date Received:

Date Reported:

Quote No:

Order No:

Client Reference:

Submitted By:

1730765

27-Feb-2017

06-Mar-2017

72157

Branthwaite

Nicola Peacock

SPv1

Sample Type: Soil

Sample Name:

Lab Number:

SS8.1

27-Feb-2017 1:09

pm

SS8.2

27-Feb-2017 1:15

pm

SS9.2

27-Feb-2017 1:26

pm

SS10.1

27-Feb-2017 1:33

pm

1730765.1 1730765.2 1730765.3 1730765.4 1730765.5

SS9.1

27-Feb-2017 1:20

pm


mg/kg dry wt 3 4 4 4 4Total Recoverable Arsenic

mg/kg dry wt < 0.10 0.19 0.31 0.35 < 0.10Total Recoverable Cadmium

mg/kg dry wt 12 16 16 17 13Total Recoverable Chromium

mg/kg dry wt 9 9 13 18 6Total Recoverable Copper

mg/kg dry wt 23 135 69 105 22Total Recoverable Lead

mg/kg dry wt 9 11 10 11 10Total Recoverable Nickel

mg/kg dry wt 62 126 121 147 58Total Recoverable Zinc

Sample Name:

Lab Number:

SS10.2

27-Feb-2017 1:39

pm

1730765.6


mg/kg dry wt 4 - - - -Total Recoverable Arsenic

mg/kg dry wt 0.22 - - - -Total Recoverable Cadmium

mg/kg dry wt 16 - - - -Total Recoverable Chromium

mg/kg dry wt 10 - - - -Total Recoverable Copper

mg/kg dry wt 57 - - - -Total Recoverable Lead

mg/kg dry wt 12 - - - -Total Recoverable Nickel

mg/kg dry wt 105 - - - -Total Recoverable Zinc

The following table(s) gives a brief description of the methods used to conduct the analyses for this job. The detection limits given below are those attainable in a relatively clean matrix.

Detection limits may be higher for individual samples should insufficient sample be available, or if the matrix requires that dilutions be performed during analysis.

S U M M A R Y O F M E T H O D S

Sample Type: Soil


1-6Heavy Metals, Screen Level Dried sample, < 2mm fraction. Nitric/Hydrochloric aciddigestion US EPA 200.2. Complies with NES Regulations. ICP-MS screen level, interference removal by Kinetic EnergyDiscrimination if required.

0.10 - 4 mg/kg dry wt

These samples were collected by yourselves (or your agent) and analysed as received at the laboratory.

Samples are held at the laboratory after reporting for a length of time depending on the preservation used and the stability ofthe analytes being tested. Once the storage period is completed the samples are discarded unless otherwise advised by theclient.

This report must not be reproduced, except in full, without the written consent of the signatory.

Peter Robinson MSc (Hons), PhD, FNZIC

Client Services Manager - Environmental

Lab No: 1730765 v 1 Hill Laboratories Page 2 of 2

soil contamination risk stage 2 detailed site investigation report … · 2020. 9. 23. · this...

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