Kennedys Bush Road and 900 Cashmere Road, Halswell, Christchurch

Soil Contamination Risk Stage 1 - Preliminary Site Investigation, Stage 2 – Detailed Investigation Report & Stage 3 – Remediation Action Plan

117 & 119 Kennedys Bush Road and 900 Cashmere Road, Halswell, Christchurch

August 2017

Malloch Environmental Ltd 801 East Maddisons Road, Rolleston 7614 021 132 0321 www.mallochenviro.co.nz

Asbestos Surveys • Soil Contamination Investigations • Environmental Planning

PSI/DSI/RAP –117-119 Kennedys Bush Road, Cashmere Road Christchurch

CONTENTS

1 Executive Summary ...... 3 2 Objectives of the Investigation ...... 3 3 Scope of Work Undertaken ...... 3 4 Site Identification ...... 4 5 Site Description and Surrounding Environment ...... 5 6 Geology and Hydrology ...... 5 7 Site History ...... 6 7.1 Previous Site Ownership and Use...... 6 7.2 District Council Records ...... 6 7.3 Regional Council Records ...... 6 7.4 LINZ Records ...... 7 7.5 Review of Historic Aerial Photographs ...... 7 8 HAIL Uses and Possible Types of Contaminants Associated with Past Use ...... 7 9 Basis for Soil Guideline Values (SGV)...... 8 9.1 Activity Description ...... 8 9.2 Zoning ...... 8 9.3 Soil Guideline Values ...... 8 10 Risk Discussion ...... 9 11 Sampling and Analysis Plan and Sampling Methodology ...... 10 12 Field Quality Assurance and Quality Control ...... 11 13 Laboratory Quality Assurance and Quality Control ...... 11 14 XRF Quality Assurance Measures ...... 11 15 Results Analysis and Summary ...... 11 16 Site Characterisation and Recommendations ...... 12 17 Planning Status ...... 13 18 Remedial Actions ...... 13 18.1 Remediation Goals ...... 13 18.2 Remedial Options and Discussion ...... 13 18.3 Proposed Methodology ...... 14 18.4 Affected Volumes ...... 14 18.5 Unexpected Contaminated Material ...... 14 18.6 Contact Details during Remediation ...... 14 19 Site Remediation Management Plan ...... 14

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PSI/DSI/RAP –117-119 Kennedys Bush Road, Cashmere Road Christchurch

19.1 Site Setup ...... 14 19.2 Stormwater and Soil Management ...... 15 19.3 Dust Control...... 15 19.4 Occupational Safety and Health Issues and Measures ...... 15 20 Validation Sampling ...... 15 21 Conclusion ...... 15 22 Limitations ...... 16 Appendices

A Certificates of Title B Listed Land Use Register Statement C Aerial Photos D Sample Location Plan E Table of XRF Results F Table of Laboratory Results G Laboratory Reports

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PSI/DSI/RAP –117-119 Kennedys Bush Road, Cashmere Road Christchurch

1 Executive Summary The subject site is a large block of land on Kennedys Bush and Cashmere Road, in Southeast Halswell, Christchurch. It is proposed to subdivide the site for residential use. This will change the use of the land and result in disturbance of soils. The Resource Management (National Environmental Standard for Assessing and Managing Contaminants in Soil to Protect Health) Regulations 2011 (NESCS) require an assessment of the likelihood of soil contamination being present. It is noted also that Malloch Environmental Ltd is obligated to consider the requirements of Section 10 (4) of the Health and Safety at Work (Asbestos) Regulations 2016. This report details the work undertaken to assess the risks.

The investigations have shown that the majority of the site has been used for pasture land in its known history. This type of use is unlikely to have caused any soil contamination that would pose a risk to human health, and no further investigation is required for the majority of the site. However, a dwelling and farm outbuildings have existed at 117 and 119 Kennedys Bush Road since prior to 1955, posing a risk of contamination on that part of the site. It was recommended that a Detailed Site Investigation, in terms of the Ministry for the Environments Contaminated Land Management Guidelines, be undertaken on the risk areas within these lots prior to subdivision and development for a residential use.

Soil sampling and testing by portable XRF, along with lab testing, was undertaken at the site and has confirmed lead and arsenic contamination above residential soil guideline values as shown on the plan in Appendix D. There is considered to be a moderate to high risk to human health if these areas were to be used for residential use. It is recommended that remediation and validation of the areas is carried out before the land is used for a residential use.

It is proposed to remediate these areas by excavating and disposing of the affected soils to Burwood landfill or an alternative authorised location. Full validation of each area will be carried out and a validation report will be provided to the authorities.

In terms of planning status at the time of writing of this report, the NES does apply to the site as this investigation has shown confirmed soil contamination above the standards set out in regulation 7. Resource consent under the NES is required for the proposed subdivision, change in use and the remediation works which will involve soil disturbance.

This report details all of the investigations undertaken and also details the proposed remediation actions and appropriate health and safety procedures.

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 1 Preliminary Site Investigation Report, a Stage 2 Detailed Site Investigation Report and a Stage 3 Remediation Action Plan. The objectives include determining whether there is any soil contamination present that would pose a risk to human health and recommending remedial measures for any contamination found.

3 Scope of Work Undertaken The scope of the work undertaken has included: • Review of Christchurch District Council property files

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PSI/DSI/RAP –117-119 Kennedys Bush Road, Cashmere Road Christchurch

• Obtaining ECan data from the Listed Land Use Register (LLUR) • Search of LINZ NZ orchard database • Review of historic aerial photos • Review of historic titles • On site soil sampling and lab testing • Analysis of results in accordance with MfE Guidelines • Development of remediation action plan • Preparation of report in accordance with MfE guidelines

4 Site Identification The 6.7 hectare site is located in Halswell and is bounded by Kennedys Bush Road and Cashmere Road. It adjoins the Quarry View subdivision, which has recently been developed off Kennedys Bush Road. The site is outlined in red on the plan below in Figure 1. Street addresses and legal descriptions of the lots included in the site are:

Street Address Legal Description Area (ha) 900 Cashmere Road Lot 2 DP 356839 2.9056 117 Kennedys Bush Road Lot 1 DP 474804 0.1463 119 Kennedys Bush Road Lot 2 DP 474804 3.6924 Total Area 6.7443

#117 #119

#900

Figure 1 – Location Plan

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5 Site Description and Surrounding Environment The site is generally flat land near the base of the Port Hills, in South East Halswell. It is currently in rural use and is generally used for grazing. There is a dwelling, garage and a number of accessory buildings.

Halswell Quarry Park is across the road to the south of the site. A small cluster of residential houses are across the road to the southeast of the site. There are additional residential lots to the north of the site. The remainder of the surrounding land is in rural use.

6 Geology and Hydrology The ECan GIS describes the soils as a combination of deep silty loam types as detailed in the plan below. Trace elements are ‘Regional, Gley’ for the majority of the site and ‘Regional, Yellow Grey Earth’ for the south-east corner. Wells in the area indicate that topsoils are underlain by layers of soil and sand, shingle and clay.

Taitapu deep silty loam Trace elements: Regional Gley

Kaiapoi silty loam Trace elements: Regional Gley

Horotane deep silty loam Trace elements: Regional Yellow Grey Earth

Figure 2 – Soil Type Plan

The site lies over the coastal confined gravel aquifer system. Wells on the site indicate that ground water levels are approximately 1-1.4m deep. The direction of ground water flow is generally in a south-east direction

ECan GIS indicates there are no open water features on the subject site, however there may be farm drains present.

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7 Site History 7.1 Previous Site Ownership and Use

Historic Certificates of Title (copies in Appendix A) were searched and the following relevant history was recorded:

900 Cashmere Road – Lot 2 DP 356839 1958 to 1968 – John Joseph Clarke, Farmer 1968 – William Hugh and Gillian Mary Gee 2005 to present – Brian Gillman Limited

117 & 119 Kennedys Bush Road – Lot 1 + Lot 2 DP 474804 1958 to 1968 – John Joseph Clarke, Farmer 1968 to 1970 – Arthur Telford Woolhouse, Farmer 1970 to 1974 – William Clifford Ambler, Farmer 1974 to 2005 – John Green, Sharebroker 2005 to present – Brian Gillman Limited

Note: Some of the information prior to 1980 is from hand written script of low quality, and may not be accurate

7.2 District Council Records

The property files held by Christchurch City Council were provided on CD and viewed. The following relevant information was noted:

• 117 & 119 Kennedys Bush Road – Subdivision consent separating out dwelling at 117 Kennedys Bush Road • 900 Cashmere Road – no records held

7.3 Regional Council Records

The ECan Listed Land Use Register Statement was searched and none of the lots that make up the subject site were listed. Two adjacent sites are listed:

• 26-50 Glovers Road and 116-122 Kennedys Bush Road for ‘A10 - Persistent pesticide bulk storage or use’. Preliminary and detailed site investigations from 2013 identified areas within Lot 2 DP 322542 exceeding residential SGV for arsenic and lead around farm buildings, a yard area and a waste pit. PAH and TPH exceeded SGV adjacent to and under old oil drums. Remediation was recommended for the identified areas. The reports are under review by ECan. • 113 Kennedys Bush Road for ‘A10 - Persistent pesticide bulk storage or use’ because market garden plots and an orchard were noted in aerial photographs from 1994 until 2011. The site is defined as ‘Verified HAIL has not been investigated’.

A copy of the LLUR Statement is included in Appendix B.

Resource consent information was sourced from the GIS mapping system. A number of wells and consents were noted, however most were not used, inactive or terminated. An adjacent site has active consents to divert groundwater and to take and use groundwater.

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7.4 LINZ Records

The LINZ Orchard layer does not show the subject site or adjacent sites as having listed orchards.

7.5 Review of Historic Aerial Photographs A total of eight aerial photos (see copies in Appendix C) have been used to assess the historical use of the site as detailed below:

• The earliest photo reviewed is from 1955 and has been sourced from ECan’s GIS. There is a dwelling on 117 Kennedys Bush Road and associated farm buildings on 119 Kennedys Bush Road. The remainder of the site appears to be pasture land. The surrounding area is also rural land.

• A further photo from 1965, also sourced from ECan’s GIS, shows a shed or garage has been built behind the dwelling at 117 Kennedys Bush Road. The adjacent farm buildings appear to have been replaced with newer, larger sheds. The start of residential buildings on the hill to the south of the site is commencing. All other surrounding land is rural.

• A further photo from 1974 is also from ECan’s GIS. A small outbuilding is now present at 900 Cashmere Road. There are no other significant changes to the subject site or surrounding area.

• A photo from 1984 is sourced from ECan’s GIS. There are no significant changes to the subject site or surrounding area.

• A photo from 1994 from ECan’s GIS shows no significant changes to the subject site. A lot to the north of 119 Kennedys Bush Road now shows signs of planting, this is assumed to be the market gardening or orchard listed in the LLUR.

• A photo from 2004, sourced from ECan’s GIS, is grainy and detail is difficult to discern. There appears to be no significant changes to the subject site or surrounding area.

• A photo from 2011 is sourced from ECan’s GIS and a horse training track is straddling 900 Cashmere Road and 119 Kennedys Bush Road. The majority of the site is still pasture land.

• The most recent aerial photo reviewed, dated 2016, sourced from ECan’s GIS shows no significant changes to the subject site. Residential development is occurring to the north of 119 Kennedys Bush Road.

8 HAIL Uses and Possible Types of Contaminants Associated with Past Use The Hazardous Activities and Industries List (HAIL) compiled by The Ministry for the Environment include the following categories (in italics) that could be associated with the historical uses of the site with a summary of the risk of these activities having been carried out on the site.

A Chemical manufacture, applications and storage

1. Agrichemicals including commercial premises used by spray contractors for filling, storing or washing out tanks for agrichemical application 8. Livestock dip or spray race operations

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10. Persistent pesticide bulk storage or use including sport turfs, market gardens, orchards, glass houses or spray sheds

The majority of the site has been used for pastoral activities for all its known history. The normal uses of fertilisers and pastoral weed controls associated with these uses are unlikely to have caused soil contamination that would pose a risk to human health.

There is no indication that sheep farming was a predominant historic use and no evidence of livestock dips was found.

It is likely that chemicals and fuels have been stored in the various farm outbuildings at 117 and 119 Kennedys Bush Road over the years. Contaminants of concern include heavy metals, hydrocarbons and organochlorine pesticides (OCP).

H Any land that has been subject to the migration of hazardous substances from adjacent land in sufficient quantity that it could be a risk to human health or the environment

Preliminary and detailed site investigations on a property to the west of Kennedys Bush Road found evidence of soils contaminated with lead and arsenic around old buildings and PAH and TPH around old oil drums. It is considered highly unlikely that any contamination would have migrated to the subject site due to the separation distance of at least 120m.

A lot to the north of 119 Kennedys Bush Road has been listed on the LLUR for market gardens and an orchard from 1994 aerials. From the aerials reviewed for this investigation the possible garden/orchard does not seem significant and has since been developed as a residential lot.

I - Any other land that has been subject to the intentional or accidental release of a hazardous substance in sufficient quantity that it could be a risk to human health or the environment

An established dwelling and outbuildings were noted on the earliest aerial photo of the subject site from 1955, at 117 Kennedys Bush Road and behind. This poses the risk of lead based paints and also building materials containing asbestos. Any natural deterioration or intentional removal, prior to modern day risk mitigating methods, may have caused contamination of the soil. Contaminants of concern include lead and asbestos.

9 Basis for Soil Guideline Values (SGV) 9.1 Activity Description

This report has been written for the following potential activities: • Subdivision and development of the site for residential use, • Soil disturbance activities associated with the above use and development of the site

9.2 Zoning

The subject site is currently zoned Residential New Neighbourhood.

9.3 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

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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 land-use scenarios applicable for this site would be ‘residential 10% produce’ and ‘commercial/industrial/outdoor maintenance workers’ as a proxy for construction workers disturbing soils.

10 Risk Discussion The majority of the site has been used for pasture land for its known history. This type of use is unlikely to have caused soil contamination that would pose a risk to human health and is considered suitable for residential use with no further investigations required.

However, the investigations undertaken have indicated a possible risk area within the subject site, shaded red on Figure 3 below. A dwelling and outbuildings have existed on the subject site at 117 and 119 Kennedys Bush Road prior to 1955. It is possible that lead based paint and asbestos containing materials have been used on these buildings, and chemicals and fuels may have been stored in the various outbuildings. It is recommended that a Detailed Site investigation be carried out on this part of the subject site.

Risk Area

Figure 3 – Risk Area Plan

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11 Sampling and Analysis Plan and Sampling Methodology Sampling was performed to determine whether any soil contamination existed within the risk area identified. A judgmental sampling methodology was used to quantify any soil contamination around the site of the dwelling. A general methodology of taking an XRF reading approximately 0.5m away from the building and taking readings progressively further away from the building until the XRF indicated that any contaminants were below the residential SGVs. Surface soils were tested with XRF in seven sample locations around the dwelling. A further eight locations were XRF tested around the sheds, lawn and garden at the rear. Seven samples, including one duplicate, were submitted to Hill Laboratory for heavy metal analysis. Ash was noted in the soil at location SS13. Judgmental sampling was also performed around the farmyard area. Surface soils were XRF tested in fifteen sample locations around the existing buildings and the locations of the buildings from the 1955 aerial. Three samples were submitted to Hill Laboratory for heavy metal analysis. Location Y5 was at the end of a concrete drain running through the remaining concrete floor of an older partially demolished shed. This sample was submitted for OCP analysis as well as heavy metal analysis.

Figure 4 – Partially demolished shed with small V drain

See Appendix D for the sample location plan. As it was proposed to use the XRF for the majority of heavy metal testing and the device reads 23 metals, the contaminants to focus on were narrowed down to those likely to be present based on the risk profile and the limitations of the XRF. It is noted that the XRF is not suitable for measuring cadmium with the limit of detection being higher than the residential SGV. As cadmium is primarily associated with fertiliser storage or industrial processes it was considered unlikely to be a significant contaminant of concern, however was included in the standard laboratory metal suite tested. The results from the XRF for arsenic, chromium, copper, lead, nickel and zinc were all analysed in detail, and only reported if results were over detection limits. For each sample location and depth, three XRF tests were performed over an approximate 10cm2 area. It was noted that the sampling was undertaken following an extended period of rain and the soils were saturated in many locations. During the site sampling, there was no evidence of potential asbestos containing materials in a deteriorated state and therefore there is no reasonable cause to suspect that asbestos may be present in the soils. It was noted that the porch of the dwelling had cement board cladding, however this was in good condition and was surrounded by concrete pathway.

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12 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 and 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.

Relative percentage difference values (RPD) were calculated for the blind replicate sample and all values were below the accepted values of 30 – 50%.

13 Laboratory Quality Assurance and Quality Control All laboratory tested samples were submitted to Hill Laboratories in Christchurch for analysis. 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.

14 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 days 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 30% of the samples were laboratory tested for seven heavy metals.

It was not possible to perform a regression analysis on the arsenic XRF readings and laboratory results as there were insufficient results above the detectable limits. A regression analysis performed on the lead XRF readings and laboratory results gave a statistical R2 error result of 0.662. This is below the minimum acceptable value of 0.70 so the regression can’t be used to determine an XRF reading that could reliably be expected to be below the residential SGV of 210 mg/kg for lead. The lack of correlation between the XRF and laboratory results is likely to be due to the very wet soils during testing. Experience on multiple similar sites indicates that any location with an XRF result of 130mg/kg or more is reasonably likely to be above the residential SGV of lead. Since remediation of the site is likely to be completed during drier conditions more reliable validation testing XRF results should be achievable.

15 Results Analysis and Summary The XRF and laboratory results showed eighteen locations with lead concentrations above, or likely to be above, the residential soil guideline value (SGV) of 210 mg/kg. Two locations had arsenic concentrations above the SGV of 20mg/kg, as measured by lab tests.

Around the dwelling the lead concentrations were elevated above the SGV up to approximately 3m from the building on the north, west and south side. This is likely to be due to lead-based paint used on the dwelling. To the east, behind the dwelling, the SGV was exceeded across most

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of the lawn and garden area. The lab reported lead concentrations in this area ranged from 250 mg/kg to 620 mg/kg. The highest lead concentration was recorded at SS13 which also returned a result of 300mg/kg for arsenic. This is well above the residential SGV for arsenic of 20 mg/kg, and also above the commercial/outdoor worker SGV of 70mg/kg. This location had visible ash so the high arsenic is likely to be a localised hotspot.

Within the farmyard area, lead concentrations were elevated above the residential SGV up to approximately 3m from the existing buildings and within the area where buildings previously existed according to the 1955 aerial. The sample taken at Y3 also exceeded the SGV for arsenic. OCP analysis of the sample from Y5 showed no compounds above the limit of detection.

Concentrations of zinc were above the ecological receptor guideline across the site. Concentrations of chromium, copper and zinc were above the ecological receptor guideline, at sample locations SS13 and Y3. However, as there are no nearby ecological features, and remediation is proposed, this is not considered to pose a risk. Elevated chromium and copper concentrations could be due to the storage of CCA treated timber or ash from burning treated timber.

A table of XRF results is shown in Appendix E and a table of laboratory results is shown in Appendix F. Copies of the Laboratory Reports are included in Appendix G.

16 Site Characterisation and Recommendations

Sampling has confirmed lead contaminated soils across the identified risk area around the dwelling and the existing and historical farmyards. Two locations also returned results with arsenic contamination. The contaminated area is approximately 2,350m2.

Conceptual Site Model Source Pathways Receptor Risk Assessment Approximately Dermal Future site Moderate to high risk to human 2,350m2 of contact, occupiers / health in a residential use. lead ingestion land users contaminated and Workers Low risk to human health as the soils with inhalation involved in levels are well below the isolated soil commercial / outdoor worker SGV arsenic

Human disturbance at of 3300mg/kg for lead. hotspots. Lead the site Moderate risk to human health at levels range location SS13 where 300mg/kg of from 250-620 arsenic was recorded, exceeding the mg/kg, nearly commercial / outdoor worker SGV triple the of 70mg/kg for arsenic. residential SGV. Infiltration Groundwater Low risk as heavy metals bind well through soils is assumed to to the soils and are likely to be

to be 1-1.4m limited to the top 300mm of soil.

groundwater deep at the site

Surface Surface water Low risk as no adjacent surface Ecological runoff to ecology waterways waterways

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It is recommended that the contaminated area be remediated prior to being used for a residential use.

The remainder of the site has been used for pasture land all of its known history. This type of use is unlikely to have caused any risk of soil contamination having occurred, and no further investigations are recommended for this area.

17 Planning Status In terms of the NESCS 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. Section 6 describes the methods for determining whether the land is as described in section 7. Method 6 (3) is to rely on a Preliminary Site Investigation.

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 contamination is present above the applicable standard in regulation 7.

Resource consent under the NES is required for the proposed subdivision and the remediation works which will involve soil disturbance above the permitted thresholds, and is to be obtained prior to any remediation works commencing.

18 Remedial Actions

18.1 Remediation Goals

• Ensure that the soils remaining in the remediated areas have lead and arsenic levels below the residential SGVs of 210 mg/kg for lead and 20 mg/kg for arsenic. • Ensure that any contaminated soil removed off-site is disposed of to an approved facility

18.2 Remedial Options and Discussion

The remediation options considered include: • Leaving the contaminated soils in-situ • Excavating and removing all contaminated soils and disposal to an approved landfill • Excavate and mix with ‘clean’ site soils to dilute contaminants • Excavate and relocate to an alternative location on site

Approximately 2,350m² of the subject site has lead contamination above the residential SGV. Within this area two isolated locations also have arsenic contamination above the residential SGV. It is likely that this contamination is restricted to the top 300mm layer of soil which equates to approximately 705m³ of contaminated soil. Leaving the soil in-situ is not an option as the area is large and above residential SGVs. Given that the area is so large, diluting the soils by mixing with ‘clean’ soil is not a viable option as this would contaminate a much larger area of the site. Relocating the soil to an alternative location on site is also not a viable option as there is no proposal for reserves or bunded areas. Burwood landfill accepts soils with lead levels below the recreational SGV of 880mg/kg for lead and 80mg/kg for arsenic. As the majority of the contamination is well below recreational SGVs, removal of the contaminated soil to Burwood landfill is an option. Alternative off-site locations may also be considered if they become available and appropriate criteria are met.

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18.3 Proposed Methodology

It is proposed to excavate and dispose of the approximately 2,350m² of contaminated soil. Initially, soil will be excavated to a depth of approximately 200mm and will then be retested with XRF to determine if further layers need to be removed. It is expected the final excavation depth will average 300mm deep. The Sample Location Plan in Appendix D shows the approximate area to be remediated. It is noted that full delineation of the extent of contamination will be completed during the remediation. It is proposed to carry out the delineation and remediation in conjunction with the use of a portable XRF to ensure all contaminated soils within the identified area are removed and that the volume of material removed is kept to the minimum required to achieve the remediation objective. The objective is to ensure that the remaining soils have lead and arsenic levels below the residential SGVs of 210mg/kg for lead and 20mg/kg for arsenic. The excavated soil is to be disposed of at Burwood landfill or an alternative authorised location.

18.4 Affected Volumes

The estimated volume of the contaminated soils is 705 cubic metres, although this is subject to change as full delineation is carried out during the remediation.

18.5 Unexpected Contaminated Material

During the excavation works, if any other hazardous material is encountered in significant volumes that pose a threat to the health of workers on site, all works will cease until the hazardous material has been assessed in accordance with MfE guidelines.

18.6 Contact Details during Remediation

Environmental Consultant: Nicola Peacock, Malloch Environmental Ltd, ph 021 132 0321

Developers Engineer: Dean Gregory, Gillman Wheelans Ltd, ph 021 433 457

19 Site Remediation Management Plan 19.1 Site Setup

Prior to any works commencing the following should be in place on site: • Contaminated areas should be clearly identified with site entry and exits planned before works commence • Appropriate washing facilities should be put in place to clean any equipment exposed to contaminated soils • Hand washing facility must be available for all workers, in the immediate area of the work site • Remediation should be planned in advance to ensure it occurs in a staged approach/ methodical manner to ensure that vehicles do no track contaminated soils onto clean areas • A complete copy of the Detailed Site Investigation Report and this Remediation Action Plan should be provided to the contractor prior to any works commencing

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19.2 Stormwater and Soil Management

Remediation work will not take place during heavy rain or high wind. As the work is predominantly excavation below the ground surface, it is expected that any rainfall occurring after the excavation is completed, will be trapped within the excavated area and not run off to any other part of the site. If rainfall occurs and tracking of wet contaminated soils to other parts of the site becomes a risk, work will cease. Soil will be loaded directly onto trucks and will not be stockpiled for extended periods on site, other than within the excavated area.

19.3 Dust Control

Water will be available at the site and if required will be used to keep the dust emissions to an acceptable level to protect human health.

All vehicles transporting soils to Burwood Landfill are to use tarpaulins to prevent dust emissions if required.

19.4 Occupational Safety and Health Issues and Measures

The contractor shall prepare a site specific Health and Safety Plan covering all relevant matters and all workers will be inducted prior to site remediation works beginning. As a minimum the following matters will need to be included:

• Appropriate personal protection gear which should include as a minimum, head to toe clothing, the use of gloves for any worker handling soil, dust masks to prevent ingestion of contaminated dust particles, safety footwear, hard hats and hi-vis vests • Appropriate hand washing measures to prevent ingestion of contaminated soil particles • Consideration of machinery tracking contaminants • Truck loading procedures and spill prevention • Decontamination measures for all equipment

20 Validation Sampling The use of a portable XRF during the remediation will be used to delineate and validate that the soils are below the residential SGV. When the remediation is complete, laboratory sampling will be undertaken to confirm the XRF results, and also to confirm that the site has been suitably remediated. Samples will be submitted to Hill Laboratories for testing for lead and arsenic as applicable.

Where validation sampling reveals remaining contaminated soils, further remediation works shall be carried out in a similar manner as detailed above. A Validation Report will be produced and provided to Christchurch City Council and ECan.

21 Conclusion The investigations have shown that part of the subject site has lead and arsenic contamination above residential soil guideline values as shown on the plans in Appendix D. There is considered to be a moderate to high risk to human health if these areas were to be used for residential use. It is proposed to remediate these areas by excavating and disposing of the affected soils to Burwood landfill or an alternative authorised location. Full validation of the area will be carried and out and a validation report will be provided to the authorities.

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22 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.

This report does not attempt to describe all risks or possible outcomes resulting from carrying out remediation works. Any party carrying out remediation works shall be responsible for all such works, including implementing all health and safety precautions as appropriate. Malloch Environmental Limited disclaims all liability whatsoever for any loss or damages, if any, suffered by any party as a result of any remediation works undertaken.

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:

Fran Hobkirk Environmental Scientist

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

Nicola Peacock, CEnvP Principal Environmental Engineer

Malloch Environmental Ltd Page 16

PSI/DSI/RAP –Kennedys Bush Road, Cashmere Road Christchurch

Appendix A – Certificates of Title

Malloch Environmental Ltd

COMPUTER FREEHOLD REGISTER UNDER LAND TRANSFER ACT 1952

Historical Search Copy

Identifier 652933 Land Registration District Canterbury Date Issued 15 May 2014

Prior References CB7D/172 Estate Fee Simple Area 1463 square metres more or less Legal Description Lot 1 Deposited Plan 474804 Original Proprietors Brian Gillman Limited

Interests

Transaction Id Historical Search Copy Dated 7/07/17 11:07 am, Page 1 of 1 Client Reference 117 Kennedys Bush Rd

COMPUTER FREEHOLD REGISTER UNDER LAND TRANSFER ACT 1952

Historical Search Copy

Identifier CB7D/172 Cancelled Land Registration District Canterbury Date Issued 26 January 1968

Prior References CB767/61 Estate Fee Simple Area 3.8369 hectares more or less Legal Description Lot 10 Deposited Plan 2380 Original Proprietors John Michael Torney Green and Margaret Dorothea Greene

Interests 6480699.1 Transfer to Brian Gillman Limited - 4.7.2005 at 9:00 am 6480699.2 Mortgage to FM Custodians Limited - 4.7.2005 at 9:00 am 7127587.2 Discharge of Mortgage 6480699.2 - 23.11.2006 at 9:00 am 7127587.3 Mortgage to Southland Building Society - 23.11.2006 at 9:00 am 8325920.1 NOTICE OF CLAIM OF INTEREST PURSUANT TO SECTION 42(2) PROPERTY (RELATIONSHIPS) ACT 1976 BY BARBARA FRANCES GILLMAN - 29.10.2009 at 9:54 am 8385322.4 Lapse of Notice of Claim 8325920.1 pursuant to Section 145A Land Transfer Act 1952 - produced 24.12.2009 at 9:00 am and entered 22.1.2010 at 9.00 am 8980766.1 Discharge of Mortgage 7127587.3 - 15.2.2012 at 10:05 am 9727423.1 CTs issued - 15.5.2014 at 12:50 pm Legal Description Title Lot 1 Deposited Plan 474804 652933 Lot 2 Deposited Plan 474804 652934 CANCELLED

Transaction Id 41101207 Historical Search Copy Dated 1/09/14 12:49 pm, Page 1 of 1 Client Reference snightingal002

PSI/DSI/RAP –Kennedys Bush Road, Cashmere Road Christchurch

Appendix B – LLUR Statement

Malloch Environmental Ltd

Property Statement from the Listed Land Use Register

Visit www.ecan.govt.nz/HAIL for more information about land uses.

Customer Services P. 03 353 9007 or 0800 324 636 PO Box 345 Christchurch 8140 P. 03 365 3828 F. 03 365 3194 E. [email protected] www.ecan.govt.nz

Date: 14 July 2017 Land Parcels: Lot 2 DP 356839 Valuation No(s): 2356244102 Lot 1 DP 474804 Valuation No(s): 2356244001 Lot 2 DP 474804 Valuation No(s): 2356244002

Area of Enquiry Sites intersecting area of enquiry Nearby sites of interest

Investigations intersecting area of enquiry Nearby investigations of interest

The information presented in this map is specific to the area within a 100m radius of property you have selected. Information on properties outside the serach radius may not be shown on this map, even if the property is visible.

Summary of sites:

Site ID Site Name Location HAIL Activity(s) Category 18525 26-50 Glovers Road and 116-122 Kennedys 26-50 Glovers Road and A10 - Persistent pesticide Review in Progress Bush Road, Halswell, Christchurch 116-122 Kennedys Bush bulk storage or use; Road, Halswell, Christchurch 26843 26843 Halswell South A10 - Persistent pesticide Not Investigated bulk storage or use; Please note that the above table represents a summary of sites and HAILs intersecting the area of enquiry within a 100m buffer.

Information held about the sites on the Listed Land Use Register

Our Ref: ENQ171095 Produced by: LLUR Public 14/07/2017 11:24:43 a.m. Page 1 of 3 Site 18525: 26-50 Glovers Road and 116-122 Kennedys Bush Road, Halswell, Christchurch (Within 100m of enquiry area.) Site Address: 26-50 Glovers Road and 116-122 Kennedys Bush Road, Halswell, Christchurch Legal Description(s): Lot 1 DP 1580,Lot 1 DP 322542,Lot 1 DP 348222,Lot 2 DP 322542

Site Category: Review in Progress Definition: Investigation reports have been received and are currently being reviewed to determine the most appropriate site category.

Land Uses (from HAIL): Period From Period To HAIL land use 1973 2004 Persistent pesticide bulk storage or use including sports turfs, market gardens, orchards, glass houses or spray sheds

Notes:

29 Aug 2013 INV#16781 Detailed Site Investigation, Davie Lovell-Smith, August 2013. NES 2011 Residentail guideline values (10% produce consumption) exceeded for: Arsenic and lead around the farm buildings and in the yard area in the Northeast corner of Lot 2 DP 322542; PAH and TPH adjacent to and under the location of the old oil drums in the same yard area; Lead and arsenic in the location of the waste pit to the Southwest of Lot 2 DP 322542. An offal pit was also noted on site on the West section of Southwestern paddock on Lot 1 DP 1580. Remediation is recomended for identified areas.

Investigations:

1 Apr 2013 INV 16778: Soil Contamination Risk, Stage 1 Preliminary Site Investigation Report, Oakvale Farm Limited, April 2013 (Preliminary Site Investigation) Davie Lovell Smith

Summary of investigation(s):

Environment Canterbury has received a Preliminary Site Investigation report that includes all or part of the property you have selected.

A Preliminary Site Investigation seeks to identify potential sources of contamination resulting from current and historical land uses.

The preliminary site investigation may not have found any potential sources of contamination on the property you have enquired about. Where potential sources of contamination have been identified, a site identification number (e.g. SIT 1234) and land uses from the Hazardous Activities and Industries List (HAIL) will be shown on your statement.

This report has not yet been audited.

1 Aug 2013 INV 16781: Kennedy Bush and Glovers Road, Halswell - Stage 2 Detailed Site Investigation Report, Oakvale Farm Limited (Detailed Site Investigation) Davie Lovell Smith

Summary of investigation(s):

Report(s) have not yet been audited.

Site 26843: 26843 (Within 100m of enquiry area.) Site Address: Halswell South Legal Description(s): Lot 2 DP 20755

Site Category: Not Investigated Definition: Verified HAIL has not been investigated.

Land Uses (from HAIL): Period From Period To HAIL land use Pre 1994 2011 Persistent pesticide bulk storage or use including sports turfs, market gardens, orchards, glass houses or spray sheds

Notes:

Our Ref: ENQ171095 Produced by: LLUR Public 14/07/2017 11:24:43 a.m. Page 2 of 3 17 Oct 2013 Area defined from: 1994-2011 ECan Aerial Photographs Note: Market garden plots and an orchard was noted in aerial photographs reviewed.

Investigations:

There are no investigations associated with this site.

Information held about other investigations on the Listed Land Use Register

For further information from Environment Canterbury, contact Customer Services and refer to enquiry number ENQ171095.

Disclaimer: The enclosed information is derived from Environment Canterbury’s Listed Land Use Register and is made available to you under the Local Government Official Information and Meetings Act 1987 and Environment Canterbury’s Contaminated Land Information Management Strategy (ECan 2009).

The information contained in this report reflects the current records held by Environment Canterbury regarding the activities undertaken on the site, its possible contamination and based on that information, the categorisation of the site. Environment Canterbury has not verified the accuracy or completeness of this information. It is released only as a copy of Environment Canterbury's records and is not intended to provide a full, complete or totally accurate assessment of the site. It is provided on the basis that Environment Canterbury makes no warranty or representation regarding the reliability, accuracy or completeness of the information provided or the level of contamination (if any) at the relevant site or that the site is suitable or otherwise for any particular purpose. Environment Canterbury accepts no responsibility for any loss, cost, damage or expense any person may incur as a result of the use, reference to or reliance on the information contained in this report.

Any person receiving and using this information is bound by the provisions of the Privacy Act 1993.

Our Ref: ENQ171095 Produced by: LLUR Public 14/07/2017 11:24:43 a.m. Page 3 of 3 PSI/DSI/RAP –Kennedys Bush Road, Cashmere Road Christchurch

Appendix C – Historic Aerials

Malloch Environmental Ltd

1955 Aeria l

In forma tion in this ma p ha s been derived from va rious sources in cludin g the Ka ik oura District, Hurun ui District, Wa ima k a riri District, Christchurch District, En viron men t Ca n terbury Region a l Coun cil, Selw yn District, Ashburton District, Wa ima te District, Ma ck en zie District, Tima ru District a n d Wa ita k i District’s da ta ba ses. 0 0.045 0.09 0.135 0.18 Kilometres Boun da ry in forma tion is derived un der licen ce from LINZ Digita l Ca da stra l Da ta ba se (Crow n Cop yright Reserved). The a foremen tion ed Coun cils do n ot give a n d exp ressly discla im a n y w a rra n ty a s to the a ccura cy or comp leten ess of the in forma tion Sca le: 1:3,000 @A4 or its fitn ess for a n y p urp ose.

In forma tion on this ma p ma y n ot be used for the p urp oses of a n y lega l disp utes. The user should in dep en den tly verify the ´ Ma p Crea ted by MEL on 11:32:31 a .m. a ccura cy of a n y in forma tion before ta k in g a n y a ction in relia n ce up on it.

Ca n terbury Ma p s, New Zea la n d Aeria l Ma p p in g, En viron men t Ca n terbury, La n d 1965 Aeria l

In forma tion on this ma p ma y n ot be used for the p urp oses of a n y lega l disp utes. The user should in dep en den tly verify the ´ Ma p Crea ted by MEL on 11:31:50 a .m. a ccura cy of a n y in forma tion before ta k in g a n y a ction in relia n ce up on it.

Ca n terbury Ma p s, New Zea la n d Aeria l Ma p p in g, En viron men t Ca n terbury, La n d 1974 Aeria l

In forma tion on this ma p ma y n ot be used for the p urp oses of a n y lega l disp utes. The user should in dep en den tly verify the ´ Ma p Crea ted by MEL on 11:31:04 a .m. a ccura cy of a n y in forma tion before ta k in g a n y a ction in relia n ce up on it.

Ca n terbury Ma p s, La n d In forma tion New Zea la n d, En viron men t Ca n terbury 1984 Aeria l

In forma tion on this ma p ma y n ot be used for the p urp oses of a n y lega l disp utes. The user should in dep en den tly verify the ´ Ma p Crea ted by MEL on 11:33:54 a .m. a ccura cy of a n y in forma tion before ta k in g a n y a ction in relia n ce up on it.

Ca n terbury Ma p s, La n d In forma tion New Zea la n d, Min istry for Prima ry 1994 Aerial

Info rm atio n in th is m ap h as been derived fro m vario us so urces including th e Kaiko ura District, Hurunui District, Waim akariri District, Ch ristch urch District, Enviro nm ent Canterbury Regio nal Co uncil, Selw yn District, Ash burto n District, Waim ate District, Mackenzie District, Tim aru District and Waitaki District’s databases. 0 0.045 0.09 0.135 0.18 Kilo m etres Bo undary info rm atio n is derived under licence fro m LINZ Digital Cadastral Database (Cro w n Co pyrigh t Reserved). Th e afo rem entio ned Co uncils do no t give and expressly disclaim any w arranty as to th e accuracy o r co m pleteness o f th e info rm atio n Scale: 1:3,000 @A4 o r its fitness fo r any purpo se.

Info rm atio n o n th is m ap m ay no t be used fo r th e purpo ses o f any legal disputes. Th e user sh o uld independently verify th e ´ Map Created by MEL o n 11:29:58 a.m . accuracy o f any info rm atio n befo re taking any actio n in reliance upo n it.

Land Info rm atio n New Z ealand, Enviro nm ent Canterbury, Ministry fo r Prim ary 2004 Aeria l

In forma tion on this ma p ma y n ot be used for the p urp oses of a n y lega l disp utes. The user should in dep en den tly verify the ´ Ma p Crea ted by MEL on 11:29:14 a .m. a ccura cy of a n y in forma tion before ta k in g a n y a ction in relia n ce up on it.

Ca n terbury Ma p s, La n d In forma tion New Zea la n d, En viron men t Ca n terbury 2011 Aeria l

In forma tion on this ma p ma y n ot be used for the p urp oses of a n y lega l disp utes. The user should in dep en den tly verify the ´ Ma p Crea ted by MEL on 11:35:30 a .m. a ccura cy of a n y in forma tion before ta k in g a n y a ction in relia n ce up on it.

Ca n terbury Ma p s, La n d In forma tion New Zea la n d 2016 Aerial

Info rm atio n in th is m ap h as been derived fro m vario us so urces including th e Kaiko ura District, Hurunui District, Waim akariri District, Ch ristch urch District, Enviro nm ent Canterbury Regio nal Co uncil, Selw yn District, Ash burto n District, Waim ate District, Mackenzie District, Tim aru District and Waitaki District’s databases. 0 0.045 0.09 0.135 0.18 Kilo m etres Bo undary info rm atio n is derived under licence fro m LINZ Digital Cadastral Database (Cro w n Co pyrigh t Reserved). Th e afo rem entio ned Co uncils do no t give and expressly disclaim any w arranty as to th e accuracy o r co m pleteness o f th e info rm atio n Scale: 1:3,000 @A4 o r its fitness fo r any purpo se.

Info rm atio n o n th is m ap m ay no t be used fo r th e purpo ses o f any legal disputes. Th e user sh o uld independently verify th e ´ Map Created by MEL o n 11:28:25 a.m . accuracy o f any info rm atio n befo re taking any actio n in reliance upo n it.

Canterbury Maps PSI/DSI/RAP –Kennedys Bush Road, Cashmere Road Christchurch

Appendix D – Sample Location Plan

Malloch Environmental Ltd

LEGEND

 SS1 Soil sample location

 Soil sample location XRF and SS1 laboratory tested SS14 Y3  Y4 SS1 Soil sample location that exceeds  SS6 SS13  Y1 the residential SGV for lead SS12 Y2 SS5 Soil sample location that exceeds SS7 SS9 SS1 the residential SGV for arsenic and SS1 lead SS10 Y5 SS8 Proposed area of remediation –  SS3  SS11 depth not expected to exceed SS4 300mm and will be determined SS2 during site excavation using Y6 portable XRF

 SS15  Y7 Remediation extent to be  Y14 Y13 delineated by XRF during remediation Y15

Notes:  Y8 1. This plan has been prepared for soil contamination risk assessment purposes  Y12 only. No liability is accepted if the plan is  Y11 Y9 used for any other purposes. 2. Any measurements taken from this plan  Y10 which are not dimensioned on the electronic copy are at the risk of the user. 3. Soil sample locations are approximate only. 4. On-site XRF testing during remediation works may mean that the boundaries of remediated areas will alter 0 5 10 15 20 25m

Malloch Environmental Ltd Sample Location Plan Scale: NTS 801 East Maddisons Road, Rolleston Date: 4 August 2017 021 132 0321 117 + 119 Kennedys Bush Road, Christchurch www.mallochenviro.co.nz Drawing No: 01228/1

PSI/DSI/RAP –Kennedys Bush Road, Cashmere Road Christchurch

Appendix E – Table of XRF Results

Malloch Environmental Ltd

Table of XRF Results - 117 & 118 Kennedys Bush Road Date of testing: 18th July, 2017

Test Total Recoverable Total Recoverable Total Recoverable Total Recoverable Total Recoverable Sample ID XRF (Lab tested Sample Depth Date & Time Duration Arsenic Copper Lead Nickel Zinc Reading No samples in BOLD) (secs) Result Error Result Error Result Error Result Error Result Error SS1.1 0-50mm 22 18/07/2017 12:06 60

Result exceeds residential SGV

Result is likely to exceed residential SGV based on previous experience PSI/DSI/RAP –Kennedys Bush Road, Cashmere Road Christchurch

Appendix F – Table of Laboratory Results

Malloch Environmental Ltd

Table of Laboratory Results - 117 & 119 Kennedys Bush Road Date of testing: 18th July 2017

Analyte Sample Name: SS 1.1 SS 1.2 SS 2.1 SS 5.1 SS 8.1 SS 13.1 SS 14.1 Y 3.1 Y 5.1 Y 6.1 RPD Value Soil Guideline Values Soil Results Lab Number: 1811300.1 1811300.2 1811300.3 1811300.6 1811300.7 1811300.8 1811300.9 1811300.1 1811300.1 1811300.1 (SS1.1 Residential 10% Commercial/ Ecological &SS1.2) Depth: 0-50mm 0-50mm 0-50mm 0-50mm 0-50mm 0-50mm 0-50mm 0-50mm 0-50mm 0-50mm produce Outdoor Worker Reference receptors Reference Background1 Heavy Metals Total Recoverable Arsenic mg/kg dry wt 6 8 5 13 - 300 - 39 16 - 29% 20 70 NES 17 CCME 11.0 Total Recoverable Cadmium mg/kg dry wt 0.3 0.31 0.21 0.39 - 0.59 - 0.84 1.23 - 3% 3 1,300 NES 10 CCME 0.28 Total Recoverable Chromium mg/kg dry wt 17 22 18 22 - 136 - 68 26 - 26% 460 6,300 NES 64 CCME 19.3 Total Recoverable Copper mg/kg dry wt 35 35 29 32 - 290 - 101 59 - 0% >10,000 >10,000 NES 63 CCME 16.425 Total Recoverable Lead mg/kg dry wt 290 290 500 490 300 620 280 250 250 400 0% 210 3,300 NES 300 CCME 19.3 Total Recoverable Nickel mg/kg dry wt 23 26 27 18 - 20 - 31 18 - 12% 130 1,800 EAUK 50 CCME 16.1 Total Recoverable Zinc mg/kg dry wt 240 250 280 300 - 580 - 3,500 690 - 4% 7,400 400,000 NEPM 200 CCME 77.1 Organochlorine Pesticides Screening in Soil Aldrin mg/kg dry wt ------< 0.017 - - 2.6 160 NES - - - alpha-BHC mg/kg dry wt ------< 0.017 ------beta-BHC mg/kg dry wt ------< 0.017 ------delta-BHC mg/kg dry wt ------< 0.017 ------gamma-BHC (Lindane) mg/kg dry wt ------< 0.017 ------cis-Chlordane mg/kg dry wt ------< 0.017 ------trans-Chlordane mg/kg dry wt ------< 0.017 ------Total Chlordane [(cis+trans)*100/42] mg/kg dry wt ------< 0.04 ------2,4'-DDD mg/kg dry wt ------< 0.017 ------4,4'-DDD mg/kg dry wt ------< 0.017 ------2,4'-DDE mg/kg dry wt ------< 0.017 ------4,4'-DDE mg/kg dry wt ------< 0.017 ------2,4'-DDT mg/kg dry wt ------< 0.017 ------4,4'-DDT mg/kg dry wt ------< 0.017 ------

Total DDT Isomers mg/kg dry wt ------< 0.11 - - 70 1,000 NES - - 0.43 2 Dieldrin mg/kg dry wt ------< 0.017 - - 2.6 160 NES - - - Endosulfan I mg/kg dry wt ------< 0.017 ------Endosulfan II mg/kg dry wt ------< 0.017 ------Endosulfan sulphate mg/kg dry wt ------< 0.017 ------Endrin mg/kg dry wt ------< 0.017 ------Endrin aldehyde mg/kg dry wt ------< 0.017 ------Endrin ketone mg/kg dry wt ------< 0.017 ------Heptachlor mg/kg dry wt ------< 0.017 ------Heptachlor epoxide mg/kg dry wt ------< 0.017 ------Hexachlorobenzene mg/kg dry wt ------< 0.017 ------Methoxychlor mg/kg dry wt ------< 0.017 ------

Analyte Sample Name: RW1 Indicates result exceeds residential guideline value Aqueous Results Lab Number: 1811300.1 Indicates result exceeds ecological guideline value Heavy metals Potable (As,Cd,Cr,Cu,Ni,Pb,Zn) Indicates result exceeds background value for soil type Total Arsenic g/m3 < 0.0011 Total Cadmium g/m3 < 0.000053 NES - National Environmental Standard for Assessing and Managing Contaminants in Soils, MfE Total Chromium g/m3 0.00093 NEPM - National Environmental Protection Measures 2013, Formerly NEPC, Australia Total Copper g/m3 0.025 EAUK - Soil guideline values for nickel - Environment Agency UK 2009 Total Lead g/m3 0.0022 CCME - Canadian Environmental Quality Guidelines, CCME (updated 2012)

Total Nickel g/m3 < 0.00053 1 Concentrations for "Regional, Gley" soil group from Background concentrations in Canterbury soils, Tonkin and Taylor, July 2007

Total Zinc g/m3 0.0125 2 Ambient Concentrations of selected organochlorine in soils, Buckland, Ellis and Salter 1998 PSI/DSI/RAP –Kennedys Bush Road, Cashmere Road Christchurch

Appendix G – Laboratory Report

Malloch Environmental Ltd

R J Hill Laboratories Limited T 0508 HILL LAB (44 555 22) 1 Clyde Street Hamilton 3216 T +64 7 858 2000 Private Bag 3205 E [email protected] Hamilton 3240 New Zealand W www.hill-laboratories.com

A N A L Y S I S R E P O R T Page 1 of 3

Client: Malloch Environmental Limited Lab No: 1811300 SPv1 Contact: Nicola Peacock Date Received: 19-Jul-2017 C/- Malloch Environmental Limited Date Reported: 26-Jul-2017 801 East Maddisons Road Quote No: 72157 Rolleston 7614 Order No: Client Reference: 117 KBR Submitted By: Nicola Peacock Sample Type: Soil Sample Name: SS 1.1 SS 1.2 SS 2.1 SS 5.1 SS 8.1 18-Jul-2017 10:38 18-Jul-2017 10:39 18-Jul-2017 10:42 18-Jul-2017 11:03 18-Jul-2017 11:19 am am am am am Lab Number: 1811300.1 1811300.2 1811300.3 1811300.6 1811300.7 Individual Tests Total Recoverable Lead mg/kg dry wt - - - - 300 Heavy Metals, Screen Level Total Recoverable Arsenic mg/kg dry wt 6 8 5 13 - Total Recoverable Cadmium mg/kg dry wt 0.30 0.31 0.21 0.39 - Total Recoverable Chromium mg/kg dry wt 17 22 18 22 - Total Recoverable Copper mg/kg dry wt 35 35 29 32 - Total Recoverable Lead mg/kg dry wt 290 290 500 490 - Total Recoverable Nickel mg/kg dry wt 23 26 27 18 - Total Recoverable Zinc mg/kg dry wt 240 250 280 300 -

Sample Name: SS 13.1 SS 14.1 Y 3.1 18-Jul-2017 Y 5.1 18-Jul-2017 Y 6.1 18-Jul-2017 18-Jul-2017 11:43 18-Jul-2017 11:50 1:00 pm 1:14 pm 1:28 pm am am Lab Number: 1811300.8 1811300.9 1811300.11 1811300.12 1811300.13 Individual Tests Dry Matter g/100g as rcvd - - - 58 - Total Recoverable Lead mg/kg dry wt - 280 - - 400 Heavy Metals, Screen Level Total Recoverable Arsenic mg/kg dry wt 300 - 39 16 - Total Recoverable Cadmium mg/kg dry wt 0.59 - 0.84 1.23 - Total Recoverable Chromium mg/kg dry wt 136 - 68 26 - Total Recoverable Copper mg/kg dry wt 290 - 101 59 - Total Recoverable Lead mg/kg dry wt 620 - 250 250 - Total Recoverable Nickel mg/kg dry wt 20 - 31 18 - Total Recoverable Zinc mg/kg dry wt 580 - 3,500 690 - Organochlorine Pesticides Screening in Soil Aldrin mg/kg dry wt - - - < 0.017 - alpha-BHC mg/kg dry wt - - - < 0.017 - beta-BHC mg/kg dry wt - - - < 0.017 - delta-BHC mg/kg dry wt - - - < 0.017 - gamma-BHC (Lindane) mg/kg dry wt - - - < 0.017 - cis-Chlordane mg/kg dry wt - - - < 0.017 - trans-Chlordane mg/kg dry wt - - - < 0.017 - Total Chlordane [(cis+trans)* mg/kg dry wt - - - < 0.04 - 100/42] 2,4'-DDD mg/kg dry wt - - - < 0.017 - 4,4'-DDD mg/kg dry wt - - - < 0.017 - 2,4'-DDE mg/kg dry wt - - - < 0.017 -

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. Sample Type: Soil Sample Name: SS 13.1 SS 14.1 Y 3.1 18-Jul-2017 Y 5.1 18-Jul-2017 Y 6.1 18-Jul-2017 18-Jul-2017 11:43 18-Jul-2017 11:50 1:00 pm 1:14 pm 1:28 pm am am Lab Number: 1811300.8 1811300.9 1811300.11 1811300.12 1811300.13 Organochlorine Pesticides Screening in Soil 4,4'-DDE mg/kg dry wt - - - < 0.017 - 2,4'-DDT mg/kg dry wt - - - < 0.017 - 4,4'-DDT mg/kg dry wt - - - < 0.017 - Total DDT Isomers mg/kg dry wt - - - < 0.11 - Dieldrin mg/kg dry wt - - - < 0.017 - Endosulfan I mg/kg dry wt - - - < 0.017 - Endosulfan II mg/kg dry wt - - - < 0.017 - Endosulfan sulphate mg/kg dry wt - - - < 0.017 - Endrin mg/kg dry wt - - - < 0.017 - Endrin aldehyde mg/kg dry wt - - - < 0.017 - Endrin ketone mg/kg dry wt - - - < 0.017 - Heptachlor mg/kg dry wt - - - < 0.017 - Heptachlor epoxide mg/kg dry wt - - - < 0.017 - Hexachlorobenzene mg/kg dry wt - - - < 0.017 - Methoxychlor mg/kg dry wt - - - < 0.017 -

Sample Type: Aqueous Sample Name: RW 1 18-Jul-2017 2:06 pm Lab Number: 1811300.14 Heavy metals, totals, trace As,Cd,Cr,Cu,Ni,Pb,Zn Total Arsenic g/m3 < 0.0011 - - - - Total Cadmium g/m3 < 0.000053 - - - - Total Chromium g/m3 0.00093 - - - - Total Copper g/m3 0.025 - - - - Total Lead g/m3 0.0022 - - - - Total Nickel g/m3 < 0.00053 - - - - Total Zinc g/m3 0.0125 - - - - S U M M A R Y O F M E T H O D S 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. Sample Type: Soil Test Method Description Default Detection Limit Sample No Environmental Solids Sample Air dried at 35°C and sieved, <2mm fraction. - 7, 9, 13 Preparation Used for sample preparation. May contain a residual moisture content of 2-5%. Heavy Metals, Screen Level Dried sample, < 2mm fraction. Nitric/Hydrochloric acid 0.10 - 4 mg/kg dry wt 1-3, 6, 8, digestion US EPA 200.2. Complies with NES Regulations. ICP- 11-12 MS screen level, interference removal by Kinetic Energy Discrimination if required. Organochlorine Pesticides Screening in Sonication extraction, SPE cleanup, dual column GC-ECD 0.010 - 0.06 mg/kg dry wt 12 Soil analysis (modified US EPA 8082). Tested on as recieved sample Dry Matter (Env) Dried at 103°C for 4-22hr (removes 3-5% more water than air 0.10 g/100g as rcvd 12 dry) , gravimetry. (Free water removed before analysis, non-soil objects such as sticks, leaves, grass and stones also removed). US EPA 3550. Total Recoverable digestion Nitric / hydrochloric acid digestion. US EPA 200.2. - 7, 9, 13 Total Recoverable Lead Dried sample, sieved as specified (if required). 0.4 mg/kg dry wt 7, 9, 13 Nitric/Hydrochloric acid digestion, ICP-MS, screen level. US EPA 200.2. Sample Type: Aqueous Test Method Description Default Detection Limit Sample No Heavy metals, totals, trace Nitric acid digestion, ICP-MS, trace level. APHA 3125 B 22nd 0.000053 - 0.0011 g/m3 14 As,Cd,Cr,Cu,Ni,Pb,Zn ed. 2012 / US EPA 200.8 Total Digestion Nitric acid digestion. APHA 3030 E 22nd ed. 2012 (modified). - 14

Lab No: 1811300 v 1 Hill Laboratories Page 2 of 3 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 of the analytes being tested. Once the storage period is completed the samples are discarded unless otherwise advised by the client.

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

Ara Heron BSc (Tech) Client Services Manager - Environmental

Lab No: 1811300 v 1 Hill Laboratories Page 3 of 3 NORTH

Lot 5 Lot 8 DP 452601 DP 452601 Lot 2 Lot 4 DP 20755 DP 452601

Glovers Road 12 34 609m² 40 41 +acc 106m² 576m² 30 42 43 578m² 503m² 568m² 31 480m² 29 39 558m² 566m² 32 701m² 700m² 631m² 13 464m² 33 600m² 110 44 513m² 108 35 11 455m² 515m² 36 24 25 28 38 487m² 731m² 37 416m² 600m² 760m² 460m² 27 540m² 10 455m² 26 564m² 9 23 +acc 69m² 452m² 544m² 8 7 471m² Lot 8 DP 2380 1 6 529m² 550m² 5 532m² 3 4 571m² 565m² 566m² 118 5522m² 2 544m²

15 509m² 16 500m² 17 18 500m² 46 19 500m² 420m² 20 472m² 47 21 450m² 402m² 22 450m² 470m² 48

Kennedys Bush Road 402m² 49 78 69 450m² 50 407m² 460m² 500m² +acc 35m² 68 450m² 77 111 67 443m² 51 512m² 415m² 70 66 450m² 461m² 76 52 65 100 432m² Lot 1 473m² 424m² 551m² DP 356839 99 71 430m² 550m² 53 97 75 424m² 64 98 558m² 659m² 514m² 601m² 72 550m² 74 54 559m² 437m² 63 73 500m² 95 96 94 539m² 607m² 501m² 627m² 55 93 618m² 357m² 62 104 Lot 1 517m² DP 16765 459m² 57 56 544m² 112 103 418m² +acc 125m² 502m² 92 102 Lot 2 89 301m² 101 515m² DP 16765 301m² 90 477m² 350m² 60 61 91 58 59 316m² 336m² 88 315m² 316m² 316m² 301m² Lot 1 DP 15653 117 Cashmere Road

Note: Areas and dimensions are subject to final survey and deposit of plans. SCALE : 1:1500@A1