Phase IV Verification Report

81A & 81B Pengelly Delabole

81A & 81B Pengelly Delabole

10 August 2020

Wheal Jane Consultancy

Old Mine Offices, Wheal Jane, Baldhu, Truro, Cornwall, TR3 6EE

01872 560200

www.wheal-jane.co.uk

[email protected]

Ref: SI20159/PH4 81A & 81B Pengelly, Delabole

DOCUMENT CONTROL SHEET

Client Hemmings New Homes

Project Title 81A & 81B Pengelly Delabole

Document Title Phase IV Verification Report

Document No. 20159/PH4

Date Status Revision Prepared By Approved By

10 Aug. 20 FINAL 0 BH WJC

Phase 4 Verification Report Page 1 Report No:20159/PH4

81A & 81B Pengelly, Delabole

CONTENTS

1 INTRODUCTION ...... 3 2 REMEDIATION ...... 3 2.1 Introduction ...... 3 2.2 Garden areas ...... 3 2.3 Indoor areas ...... 4 3 SITE PREPARATION AND EXPORTING OF MATERIALS FROM SITEError! Bookmark not defined. 3.1 Removal of Contaminated Soil ...... Error! Bookmark not defined. 4 RESOURCES, ROLES AND RESPONSIBILITIES ...... 4 4.1 Monitoring Requirements ...... 4 4.2 Imported Topsoil ...... 4 5 VERIFICATION OF DEPTHS OF COVER ...... 4 6 CONTINGENCY PLANNING ...... 4 7 POST-TREATMENT MANAGEMENT ...... 5 8 NOTES ...... 6

APPENDICES:

1. Certificate of Remediation

2. Site Photographs

3. Waste Transfer Notes

4. Imported Aggregates Invoices

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81A & 81B Pengelly, Delabole

1 INTRODUCTION 1.1.1 Wheal Jane Consultancy was commissioned by Hemmings New Homes to provide a Phase IV

Verification Report for the site ‘81A & 81B Pengelly, Delabole’. The site has been the subject of a

previous Phase III Remediation Strategy produced by Wheal Jane Consultancy (Ref:20179/PH3) and this

Phase IV Verification Report should be read in conjunction with this report.

1.1.2 In order to comply with the latest government guidelines on new building developments, the site

needed to be subjected to a phased environmental assessment prior to any development works

commencing. This document forms Phase IV of those reports.

1.1.3 This report is designed to demonstrate the site has been appropriately remediated and is suitable for

its intended use. 2 REMEDIATION 2.1 Introduction

2.1.1 The site investigation revealed that elevated soil concentrations of Total Petroleum Hydrocarbons

(aromatic band >C21-C35) and Polyaromatic Hydrocarbons (Benzon[b]fluoranthene, Benzo[a]pyrene,

Dibenz[a,h]anthracene) were observed on site, in comparison with published generic assessment

criteria for residential use (Phase II, SI19454/PH2, September 2018). The subsequent remediation

strategy recommended measures for the separate areas of the development (Phase III, SI20179/PH3,

September 2018, Revised June 2020). These measures are briefly summarised below. 2.2 Garden areas

2.2.1 The client proposed to install three 1.0m x 1.0m x1.0m chambers lined with concrete and filled with

approved topsoil on site instead of a garden area. These areas are highlighted in green with the small

area requiring remediation highlighted in red on Figure 4.1 within the Phase 3 report.

2.2.2 As these chambers are concrete lined which provide an effective source – pathway - receptor break,

preventing contact with the contaminated ground by the future site occupiers a membrane is not

required.

2.2.3 All imported soil should be certified in accordance with BS3882:2015.

Phase 4 Verification Report Page 3 Report No:20159/PH4

81A & 81B Pengelly, Delabole

2.3 Indoor areas

2.3.1 The footprint of the dwelling comprises hardstanding which provides an effective source – pathway -

receptor break, preventing contact with the contaminated ground by the future site occupiers. No

remediation measures were required in these areas. However, full radon protection measures were

required to prevent ingress of radon gas.

3 RESOURCES, ROLES AND RESPONSIBILITIES

3.1 Monitoring Requirements

3.1.1 The client has informed Wheal Jane Consultancy that all appropriate foremen/workers on the site were

notified that no soil was to be removed from the site other than to a licensed waste facility, and that

there were to be no areas of original soil left exposed on site at completion. 3.2 Imported Topsoil

3.2.1 The clean topsoil was sourced from Melcourt Industries Limited who provide carefully blended topsoil

to BS 3882:2015.

4 VERIFICATION OF DEPTHS OF COVER

4.1.1 A site visit was conducted on 18th June 2020. Photographs of the completed building development

were taken at that time (Appendix 2).

5 CONTINGENCY PLANNING

5.1.1 No material that may cause contamination not previously identified was encountered during the

development.

5.1.2 The contamination on this site can affect people via ingestion, inhalation or through the skin. The client

informs us that the following conditions were met during the construction phase:

• The works were not permitted to create excessive dust that could affect on-site workers and

neighbouring properties. In dry and dusty weather conditions on the site required damping down

to avoid excessive dust.

• Minimum PPE requirements for working with the contaminated soil included dust masks (should

the site prove excessively dusty), boots and gloves were provided.

Phase 4 Verification Report Page 4 Report No:20159/PH4

81A & 81B Pengelly, Delabole

• All workers on-site had access to hand-washing facilities.

• Current HSE guidelines were adhered to with regards to working on this site.

• Further advice is available from the HSE or Cornwall Council and such advice should be sought,

where necessary, prior to any site works commencing.

6 POST-TREATMENT MANAGEMENT

6.1.1 The concrete lining will act as a suitable warning to future site users of the potential issues from the

underlying ground.

6.1.2 No further long-term treatment or monitoring is required.

6.1.3 Based on the principles and definitions outlined under Section 57 of the Environmental Act 1995, the

site would not be considered as ‘Contaminated Land’, based on its current usage.

Phase 4 Verification Report Page 5 Report No:20159/PH4

81A & 81B Pengelly, Delabole

7 NOTES

i. This report is concerned solely with the property, as defined by this report, or parts thereof examined.

ii. The report should not be used in connection with adjacent properties. iii. Wheal Jane Consultancy cannot accept any liabilities for any additional mine workings, or any other

features found outside the limits of any excavations examined. iv. The conclusions and recommendations relate to the type and extent of development outlined in this

report for this specific property only and should not be taken as suitable for any other form or extent of

development on this property without further consultation with Wheal Jane Consultancy.

v. This report is confidential to the client, the client’s legal and professional advisors, and may not be

reproduced or distributed without our permission other than to directly facilitate the sale or development

of the property concerned. vi. We have no liability toward any person not party to commissioning this report. vii. Unless otherwise expressly stated, nothing in this report shall create or confer any rights or other benefits

pursuant to the Contracts (Rights of Third Parties) Act 1999 in favour of any person other than the person

commissioning this report.

Yours faithfully,

Wheal Jane Consultancy

Phase 4 Verification Report Page 6 Report No:20159/PH4

APPENDICES

1. Certificate of Remediation

2. Site Photographs

3. Waste Transfer Notes

4. Imported Aggregates Invoices

Appendix 1

Certificate of Remediation

Certificate number: 20159-VC

Remediation Inspection – Verification Certificate

This is to certify that the scheme of remediation works regarding the placement of geo-textile and clean soil at the site: 81A & 81B Pengelly, Delabole, is recorded as having been carried out

Inspection declaration:

We have evaluated and recorded these works, and confirm that, based on site photographs, they have been completed to an appropriate standard and specification as detailed in document reference 19968/PH3 (and any subsequent agreed amendments), which were designed to afford protection from land contamination* on the site to all relevant receptors*.

Wheal Jane Consultancy Date: 10 August 2020

Client declaration:

I understand that this certificate of verification applies to the works described in the aforementioned document(s). I understand that any subsequent works to the site, or deviation from the designs disclosed to

Wheal Jane Consultancy in the preparation of the remediation scheme, may require that the site be re- certified.

Signature……………………………………… Date ………………………………………

Name………………………………………….. Position/role………………………………

*’Contamination’ and ‘receptor’ as defined in Part IIA of the Environmental Protection Act 1990 and others relevant to the development at the time of inspection.

Appendix 2

Site Photographs

Verification Site Visit

81A & 81B Pengelly, Delabole 20159 Phase 4 Verification Site Visit Hemmings New Homes August 2020 Verification Site Visit

81A & 81B Pengelly, Delabole 20159 Phase 4 Verification Site Visit Hemmings New Homes August 2020

Appendix 3

Waste Transfer Notices

'i Melcourt WHERE O BLJY Industries Limited Proven . Safe . Sustainable

Careful ly blended topsoil conforming to BS 3882:2075 Fine textured, free-flowing, easy to handle and virtually stone free Allows conformance to National House Building Council (NHBC) Warranty Requirements Suitable for vegans

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Appendix 4

Imported Aggregates Invoices

RTC PLANT HIRE LTD inc. TREBARWITH ROAD QUARRY DELABOLE Cornwall PL339DE 01840211300 [email protected] www.trebarwith- roadrusticquarry.co.uk VAT Registration No.: 402113329

BILL TO VAT Invoice 10098 D HEMMINGS BUILDERS HEMMINGS PARTNERSHIP LTD BUILDING CONTRACTORS DATE 06/02/2019 TERMS Net 30 8 VILLAGE FARM CLOSE MARHAMCHURCH DUE DATE 08/03/2019 BUDE EX23 OHN BUDE EX23 OHN

SITE/ PO NUMBER THE SIDINGS

DATE DESCRIPTION VAT QTY RATE AMOUNT

06/02/2019 2"-4" (50mm-100mm) CLEAN STONE- LOOSE 20% 64 16.00 1,024.00 PER APPROX. TONNE

DELIVERED IN 3 X 16T LOADS

ALL STONE PRODUCTS ARE SOLD AS APPROXIMATE SUBTOTAL 1,024.00 WEIGHT OR BY THE M2 UNLESS OTHERWISE SPECIFIED. VAT TOTAL 204.80 THANK YOU FOR YOUR BUSINESS. TOTAL 1,228.80

TOTAL DUE £1,228.80

TAX SUMMARY RATE TAX NET VAT @ 20% 204.80 1,024.00

BACS DETAILS; ACCOUNT NAME; RTC PLANT HIRE LTD ACCOUNT NUMBER- 53879224 SORT CODE- 20-50-40

Wheal Jane Consultancy

Wheal Jane Group

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