Planning Permission: CR/2014/0764 – Condition 11 ... Permission: CR/2014/0764 – Condition 11: Recommendations within Generic Quantitative Risk Assessment (All Parcels) Technical

Planning Permission: CR/2014/0764 – Condition 11: Recommendations within Generic Quantitative Risk Assessment (All Parcels)

Technical note - GQRA Recommendations_Finalv3 1

Technical note

Project: Former Thales Site, Crawley (Project Lola)

To: John Vincent, Environment Agency Kelvin North, Crawley Borough Council Emma Greening, Crawley Borough Council

Subject: Recommendations within Generic Quantitative Risk Assessment: Parcels 1, 2 & 3

From: Robin Slade, Atkins

Date: Mar 13, 2015 cc: Colber Adamian-Thomas, Surrey County Council Kevin Lyons, Lyons O'Neill Gary Hedges, Wilmott Dixon

Introduction Atkins Limited (Atkins) was commissioned by Surrey County Council (SCC) to provide details of the actions to be taken in regards to addressing the recommendations within Atkins’ land contamination investigation and quantitative risk assessment report1 for the redevelopment of the former Thales site on Gatwick Road, Manor Royal, Crawley, West Sussex. These details are required to satisfy a pre-commencement Planning Condition, placed on development of the site – see below. The site has been divided into ‘Parcels 1, 2 and 3’ and this document pertains to all Parcels, as per the attached drawing of the proposed phasing plan. The development plans comprise a number of buildings providing office accommodation, an emergency operations centre (EOC) for South East Coast Ambulance services (SECAmb), retail, café and restaurant space, associated parking, and limited soft landscaping. Objectives This document seeks to address the recommendations within Atkins’ ‘Ground Investigation and Generic Quantitative Risk Assessment’ (March 2014) following completion of a land contamination investigation and subsequent additional monitoring and assessment works (outlined below) for the site on behalf of SCC.

This document is submitted pursuant to Condition 11 of hybrid Planning Permission Ref: CR/2014/0764 (pending approval) for the development which states:

No development shall commence until further information is submitted to and agreed in writing by the Local Planning Authority to address the recommendations in section 12 of the Ground Investigation and Generic Quantitative Risk Assessment (March 2014) by Atkins (Report number: 5128708/20140093/R001)

Background The entire site (approximately 4 hectares), comprising all three Parcels, has previously undergone a number of recent stages of investigation and assessment, including:

Ground Investigation and Generic Quantitative Risk Assessment. Ref: 5128708/20140093/R001 (Rev 2.0). March 2014

1 Atkins Limited. Former Thales Training and Simulation Land (TTSL), Gatwick Road, Crawley. Ground Investigation and Generic Quantitative Assessment. Ref: 5128708/20140093/R001 Rev 2.0. March 2014.



Technical note Technical note: Review of Additional Information: Gatwick Road, Crawley.

Ref: Technical note_240314_B_DM. 25th March 20142 Addendum Monitoring Report. Ref: 5128708/20140093/R002. July 20143 Controlled Waters Detailed Quantitative Risk Assessment (DQRA).

Ref: 5128708/20100093/R003. December 20144 Further investigation is also currently underway within Parcel 2 to inform the detailed design for this section of the site.

Prior to these recent investigations, other works were completed between 2001 and 2009:

Geotechnics Ground Investigation Factual Report for Mott MacDonald (December 2008)5 Mott MacDonald Ltd. (Mott MacDonald) Geo-environmental Interpretive Report (May 2009)6 Mott MacDonald Environmental Liability Screening Summary Final Report (Excerpt) (April 2001)7

As part of the generic quantitative risk assessment (GQRA), undertaken in March 2014, the following recommendations were made within Section 12.2 of the report:

Controlled Waters: additional monitoring and sampling of both groundwater and surface water should be undertaken to assess fully the risks to controlled waters and to try and establish if an on-site source of the identified chlorinated solvents exists. To support the assessment of chlorinated solvents, further information regarding the previous use and storage of solvents on the site should be obtained, specifically what actions were taken in relation to the three underground storage tanks which were historically present at the site. Where possible, it is recommended the additional groundwater and surface water sampling is undertaken during a period of dry weather when surface water flow in the Brook is reduced and the on-site boreholes are not flooded. This additional monitoring data is to be captured and reported separately within an addendum to the investigation and risk assessment report. The addendum will also include review of further information, provided by Thales, subsequent to the current assessment, with regards to previous materials storage and usage on site;

Asbestos: identified asbestos and asbestos containing materials within the Made Ground across the site need to be managed in the context of the proposed future development. Given the nature of the development, for commercial use, it is considered that interruption of the exposure pathway, through the use of hardstanding and building footprints, would likely be most suitable. It is recommended that areas of soft landscaping are limited and incorporate a geotextile separator / membrane, ideally together with a high visibility marker layer, above existing Made Ground and prior to importation of sub- / topsoil or general fill to facilitate landscaping;

Ground Gas: additional ground gas monitoring should be undertaken in line with CIRIA C6658 to fully characterise risks from ground gas at the site. The building design should incorporate ground gas protection measures commensurate with a Characteristic Situation 2 or low risk gas regime, unless additional monitoring establishes a revised regime. For a commercial property a CS2 regime requires 2 points of protection which, for example, could comprise construction of a reinforced concrete ground slab for the building with limited service penetrations and a taped and sealed membrane installed in line with current good practice; and

2 Atkins Limited. Technical Note: Review of Additional Information: Gatwick Road, Crawley. March 2014. 3 Atkins Limited. Former Thales Training and Simulation Land (TTSL), Gatwick Road, Crawley – Addendum Monitoring Report. Ref: 5128708/20140093/R002. July 2014. 4 Atkins Limited. Former Thales Site, Gatwick Road, Manor Royal, Crawley. Controlled Waters Detailed Quantitative Risk Assessment (DQRA). Ref: 5128708/20140093/R003. December 2014. 5 Geotechnics Limited. Ground Investigation at TTSL Crawley. Factual Report for Mott MacDonald. Project Number: PC083481. December 2008. 6 Mott MacDonald. TTSL Crawley Geo-Environmental Interpretive Report. MM Document Ref.: 248037/EVT/01. May 2009. 7 Mott MacDonald. Environmental Liability Screening Summary Final Report. Ref: 61418/03/A. April 2011. 8 CIRIA. Assessing risks posed by hazardous ground gases to buildings. C665. 2007.



Technical note Property/Services: the development design should consider risks to water supply pipes and below-

ground concrete, undertaking a full risk assessment and choosing appropriate materials taking into account the aggressive conditions at the site. It is further recommended that service / utility runs are constructed within ‘clean’ corridors using a geotextile separator on the existing ground formation prior to the placement of imported clean backfill / bedding materials.

These recommendations have been addressed through the following actions:

Controlled Waters

Additional information gained after the date of the GQRA was summarised in a technical memorandum (March 2014), which presented a review of this information in the context of the land contamination regime at the site – including the presence of an electroplating effluent tank in proximity to the groundwater contamination near BH6 (Parcel 1). Additional monitoring was undertaken during 2014 and an addendum report was produced as per the recommendation in July 2014. Following on from this, a detailed quantitative risk assessment (DQRA) for controlled waters was completed in December 2014 following consultation with the Environment Agency. This DQRA concluded that there were no significant risks to the adjacent Crawter’s Brook from the chlorinated solvent contamination encountered within the groundwater under Parcel 1 of the site. The Environment Agency reviewed this assessment as part of the Planning Application for the development and confirmed their agreement with the conclusions. A long-term groundwater monitoring plan for the redevelopment of Parcel 2 is being implemented as per Condition 10 of the Planning Permission, as outlined in Atkins’ ‘Technical Memo: Long Term Controlled Waters Monitoring Plan’ (February 2015).

Asbestos

Asbestos of varying types was encountered within five samples taken from the Made Ground (out of a total of 35 samples taken from all soils) during the initial GQRA investigation. An additional asbestos sampling program across Parcel 2 of the development, and including the stockpile of demolition materials present in the northwestern section of the site, was undertaken by Wilmott Dixon (as the contractor for the development works) in early 2015. This included six locations within the bund present along the northern boundary of the site, and 13 locations within the stockpile. Trial pits were excavated to depths of 5 m, with samples being taken over 1 m depth ranges. All samples were reported as not containing asbestos. Potential asbestos containing materials (ACMs) were visually identified in four locations within the stockpile during investigation, including pieces of potential asbestos cement pipe, asbestos sheet, and a vinyl tile. The asbestos sheet was identified as chrysotile in type. The analytical results and sample location plan are appended to this technical note. Investigation results from the remainder of Parcel 2 are currently pending.

Based on this testing, it is considered the stockpile does not present a significant risk in terms of asbestos content as asbestos encountered during the additional sampling was all cement bound, and it is considered this material can remain on site in its current location or be reused as part of the redevelopment, subject to meeting the necessary geotechnical and any other pertinent requirements for reuse within the scheme.

The site is to be built up in accordance with the design, with suitable material. The Made Ground present at the surface of the site, which in places has been demonstrated to contain asbestos fibres, is considered suitable for use as part of the development works if below areas of hard landscaping (e.g. below car parking areas), and is not utilised within any areas of soft landscaping. There is a slightly increased risk during piling activities and the excavation of pile caps below the proposed buildings due to the presence of asbestos within the Made Ground. These risks will be managed accordingly through good practice.

Appropriate health and safety measures will be implemented during any movement or placement of this material considering the risk of asbestos, including but not limited to dampening down of soils, segregation and sheeting of stockpiled, excavated Made Ground and provision of appropriate PPE to include, as a minimum, suitably rated dust masks and disposable coveralls for ground workers managing / handling the Made Ground. Based on the contractor’s health and safety risk assessment(s) it may also be considered



Technical note necessary to delineate works on site into ‘clean’ and ‘dirty’ areas, in the context of handling the Made Ground, in line with CIRIA guidance9 and for use of a decontamination unit when staff are moving between the designated areas. Site welfare facilities shall also be maintained throughout the duration of the ground works so that clean, washing facilities are available in the event ground workers come into contact with contaminated ground. .

Ground Gas

A full ground gas risk assessment was undertaken for the site during 2014 and discussed within Atkins’ Addendum Report, including six rounds of monitoring over a four month period. All monitoring results were indicative of a CS2 (or ‘low risk’) ground gas regime for the site, which for commercial developments requires two points of protection in accordance with UK guidance10. For the Parcel 2 development, it is considered the protection measures for the proposed EOC / office building will include a selection of the following:

a) Reinforced concrete cast in situ floor slab (suspended, non-suspended or raft) with at least 1200 g damp proof membrane (DPM).

b) Beam and block or pre-cast concrete slab and minimum 2000 g DPM/reinforced gas membrane. c) Possibly underfloor passive venting or pressurisation.

All joints and penetrations through slabs etc will be taped and sealed. All gas protection measures will be installed and verified in line with current good practice guidance with appropriate records provided to Crawley Borough Council Environmental Health team. Confirmation of the design of ground gas protection measures will be provided by the development contractor.

Property/Services

In line with general good practice for laying services within a brownfield site, and considering the conditions encountered at the site (including corrosive soils with high and low pHs, the presence of certain hydrocarbons within the soils, and slightly acidic groundwater), all services will be laid in a corridor of clean fill with geotextile membrane surround. Appropriate water supply pipe materials and concrete types will be chosen for all below-ground works in line with current guidance.

9 CIRIA. A guide for safe working on contaminated sites. Report 132. 1996. 10 British Standard. Code of practice for the characterisation and remediation from ground gas in affected developments. BS8485:2007.

BSI

CLIENT

Scale @ A1:

Date :

Drawn by :

Checked by :

Drawing No:

TITLE

REVISIONS

Revision:

ARCHITECTS

c

HGP Architects Ltd.Copyright Reserved.

FURZEHALL FARM, WICKHAM ROAD FAREHAM, HAMPSHIRE, PO16 7JH

T: 01329 283 225F: 01329 237 004E: [email protected]: WWW.HGP-ARCHITECTS.CO.UK

FS 10342

NOTES:

Check dims. on site.

ARCHITECTS

FORMER THALES SITEGATWICK ROAD, MANOR ROYAL

PLANNINGNTS

JANUARY 2015

CK

GG 13.168.200

PROPOSED PHASING PLAN

SURREY COUNTY COUNCIL

Preliminary

Scientific Analysis Laboratories Ltd

Certificate of Analysis

3 Crittall Drive

Springwood Industrial

Estate

Braintree

Essex

CM7 2RT

Tel : 01376 560120

Fax : 01376 552923

Report Number: 455319-2 Supplement 1

Date of Report: 19-Feb-2015

Customer: Southern Testing Laboratories

Keeble House

Stuart Way

East Grinstead

West Sussex

RH19 4QA

Customer Contact: Mr Dan Spearman

Customer Job Reference: J12157

Customer Purchase Order: J12157_1

Customer Site Reference: TTSL Phase 1 - Gatwick Road (Crawley)

Date Job Received at SAL: 11-Feb-2015

Date Analysis Started: 12-Feb-2015

Date Analysis Completed: 18-Feb-2015

The results reported relate to samples received in the laboratory

This report should not be reproduced except in full without the written approval of the laboratory

Tests covered by this certificate were conducted in accordance with SAL SOPs

All results have been reviewed in accordance with QP22

This document has been printed from a digitally signed master copy

Scientific Analysis Laboratories is a

limited company registered in England and

Wales (No 2514788) whose address is at

Hadfield House, Hadfield Street, Manchester M16 9FE

Report checked

and authorised by :

Miss Claire Brown

Customer Service Manager

Issued by :

Mr Ben Wilding

Laboratory Manager

Page 1 of 3

455319-2Supplement 1

SAL Reference: 455319

Project Site: TTSL Phase 1 - Gatwick Road (Crawley)

Customer Reference: J12157

Bulk Product Analysed as Bulk Product

Miscellaneous

SAL Reference 455319 001

Customer Sample Reference (Board) M1 @ 0.00m

Date Sampled 09-FEB-2015

Determinand Method TestSample LOD Units

Asbestos T27 AR Chrysotile Detected

Crocidolite Detected




Soil Analysed as Soil

Miscellaneous

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Date Sampled 09-FEB-2015 09-FEB-2015 09-FEB-2015 09-FEB-2015 09-FEB-2015


Asbestos ID T27 A40 Asbestos not detected Asbestos not detected Asbestos not detected Asbestos not detected Asbestos not detected





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Produced by Scientific Analysis Laboratories Ltd, 3 Crittall Drive, Springwood Industrial Estate, Braintree, Essex, CM7 2RT Page 2 of 3


Index to symbols used in 455319-2 Supplement 1

Notes

Method Index

Accreditation Summary





Miscellaneous

SAL Reference 455319 017 455319 018 455319 019 455319 020 455319 021









Miscellaneous

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Customer Sample Reference TP5 @ 3.00m TP5 @ 4.00m TP5 @ 5.00m

Date Sampled 09-FEB-2015 09-FEB-2015 09-FEB-2015


Asbestos ID T27 A40 Asbestos not detected Asbestos not detected Asbestos not detected

Value Description

AR As Received

A40 Assisted dried < 40C

S Analysis was subcontracted

U Analysis is UKAS accredited

Supplement 1 - Report re issued to amend results for 001

The asbestos found relates to asbestos containing material (ACM).

Value Description

T27 PLM

Determinand Method TestSample LOD Units Symbol SAL References

Asbestos T27 AR SU 001

Asbestos ID T27 A40 SU 002-024






3 Crittall Drive


Estate

Braintree

Essex

CM7 2RT

Tel : 01376 560120

Fax : 01376 552923

Report Number: 455926-1



Keeble House

Stuart Way

East Grinstead

West Sussex

RH19 4QA



Customer Purchase Order: J12157_4














Report checked

and authorised by :

Miss Claire Brown


Issued by :

Miss Claire Brown


Page 1 of 3

455926-1

Index to symbols used in 455926-1





Miscellaneous

SAL Reference 455926 001 455926 002 455926 003 455926 004 455926 005 455926 006

Customer Sample Reference E Bund @ 0.00m TP2a @ 1.00m TP2a @ 2.00m TP14 @ 0.00m TP15 @ 0.00m TP16 @ 0.00m

Date Sampled 11-FEB-2015 11-FEB-2015 11-FEB-2015 11-FEB-2015 11-FEB-2015 11-FEB-2015


Asbestos ID T27 A40 Asbestos notdetected

Asbestos notdetected









Miscellaneous

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Customer Sample Reference TP17 @ 0.00m TP18 @ 0.00m TP19 @ 0.00m TP101 @ 0.00m TP102 @ 0.00m TP103 @ 0.00m













Miscellaneous

SAL Reference 455926 013 455926 014 455926 015 455926 016 455926 017 455926 018

Customer Sample Reference TP104 @ 0.00m TP106 @ 0.00m TP107 @ 0.00m TP108 @ 0.00m TP109 @ 0.00m TP110 @ 0.00m













Miscellaneous

SAL Reference 455926 019 455926 020 455926 021 455926 022 455926 023









Value Description






455926-1

Method Index


Value Description

T27 PLM





455926-1



3 Crittall Drive


Estate

Braintree

Essex

CM7 2RT

Tel : 01376 560120

Fax : 01376 552923

Report Number: 455689-1



Keeble House

Stuart Way

East Grinstead

West Sussex

RH19 4QA



Customer Purchase Order: J12157_2a














Report checked

and authorised by :

Miss Claire Brown


Issued by :

Miss Claire Brown


Page 1 of 3

455689-1





Miscellaneous

SAL Reference 455689 001 455689 002 455689 003 455689 004 455689 005 455689 006 455689 007

Customer Sample Reference M2 @ 0.00m SW Bound @0.00m

TP6 @ 1.00m TP6 @ 2.00m TP6 @ 3.00m TP6 @ 4.00m TP6 @ 5.00m

Date Sampled 10-FEB-2015 10-FEB-2015 10-FEB-2015 10-FEB-2015 10-FEB-2015 10-FEB-2015 10-FEB-2015













Miscellaneous

SAL Reference 455689 008 455689 009 455689 010 455689 011 455689 012 455689 013 455689 014

Customer Sample Reference TP7 @ 1.00m TP7 @ 2.00m TP7 @ 3.00m TP7 @ 4.00m TP7 @ 5.00m TP8 @ 1.00m TP8 @ 2.00m














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455689-1

Index to symbols used in 455689-1

Method Index






Miscellaneous

SAL Reference 455689 029 455689 030 455689 031 455689 032 455689 033 455689 034 455689 035















Miscellaneous

SAL Reference 455689 036 455689 037

Customer Sample Reference TP13 @ 2.00m TP13 @ 3.00m

Date Sampled 10-FEB-2015 10-FEB-2015




Value Description




Value Description

T27 PLM





455689-1

Environment Agency Correspondence regarding Pre-application Submissions pursuant to Conditions 6, 8, 9, 10, 11 and 12 of Application CR/2014/0764/OUT From: De Villiers, Pieter Sent: 12 March 2015 12:26

To: Slade, Robin Subject: RE: Former Thales site (Project Lola) - PACKNTSLN00197

Dear Robin Thank you for the details received 2 March 2015 in connection with pre-submissions to satisfy proposed Planning Conditions in relation to application CR/2014/0764/OUT for Parcel 2 of the development. We have the following comments to make:

Condition 6 We have reviewed Technical Note, 14-147-08A which confirm that the attenuation systems will be designed to accommodate the 1 in 100 year 30% storm. It is also stated that the required storage will be provided as permeable paving, with the discharge rate set 16l/s for the whole site. As the surface water drainage from this site discharges to the Crawters Brook, it is essential that the risk to flooding elsewhere is not increased as a result of this development. The discharge rate of 16l/s for the entire site, derived from 6l/s for Parcel 1, 5l/s for Parcel 2 and 5l/s for Parcel 3 appears acceptable.

Condition 8 Key points to note under Sections 1.11 to 1.14 of 'Technical Note 14-047-08A' by Odyssey Markides dated 24th February 2015 are:

Surface water drainage from Parcel 2 will discharge via porous paving/geotextile layers to infiltration with overflow discharge to Crawter's Brook.

The area of identified contamination in Parcel 1 will be subject to further assessment for surface water drainage proposals in due course.

We consider the information provided will be sufficient to discharge proposed Condition 8 for Parcel 2.

Condition 9 Having reviewed the document ' Technical Note Piling Risk Assessment: Development Parcel 2' by Atkins dated 27th February 2015 we note no significant ground contamination has been identified in Parcel 2. The document has identified and discussed a number of potential pollution scenarios in relation to piling activities. The use of non-displacement piles is the proposed methodology. It is recognised that piling activities may disturb and mobilise previously unidentified contamination. Concurrent groundwater and surface water quality monitoring is proposed to monitor such events, including a cessation of piling activities for further assessment should such events arise. We consider the information provided will be sufficient to discharge proposed Condition 9 for Parcel 2.

Condition 10 We have reviewed the document 'Technical Note Long Term Controlled waters Monitoring Plan: Development Parcel 2' by Atkins dated 27th February 2015. Key points noted are:

Single rounds of water quality monitoring are proposed for pre-construction, during construction after below-ground works are substantially completed, and post-construction.

The sampling points are three boreholes (BH6, BH102 & BH103) and Crawter's Brook upsteam and downstream of the development site.

A satisfactory suite of analyses is proposed.

Any elevated concentrations will be reported to the Environment Agency for review and assessment.

A final Controlled Waters monitoring report will be provided to demonstrate that pre-construction baseline conditions have not been significantly compromised.

We would like to request that the monitoring frequency is revised to "A minimum of one round ..." rather than a single round at each stage. This would then commit to additional sampling and review to be undertaken should unexpected concentrations be encountered. With this change, we would consider the information provided to be sufficient to discharge proposed Condition 10 for Parcel 2.

Condition 11 We reviewed the document 'Technical Note Recommendations within Generic Quantitative Risk Assessment: Parcels 1, 2 & 3' by Atkins dated 27th February 2015 and the comments relating to Controlled Waters have been accepted. Condition 12 The step by step approach as proposed in the document to support the discharge of Condition 12 appears acceptable. As a note, it is not until the entire site has been redeveloped will the figure of 16l/s be achieved, though as each Parcel is completed the drainage situation will show improvements over the existing condition. For future reference please note we will respond to consultations within 30 days of receipt of the documentation as per our agreement. If you have any further questions please do not hesitate to contact me

Best regards Pieter

Pieter De Villiers B Art et Scientae Sustainable Places - Senior Planning Advisor (KSL - Kent)

Orchard House, Endeavour Park, London Road, Addington, West Malling, Kent, ME19 5SH Leaving a computer monitor on all night wastes enough energy to microwave six dinners. Please turn yours off.

From: Slade, Robin

Sent: 11 March 2015 21:56 To: De Villiers, Pieter

Subject: RE: Former Thales site (Project Lola) - PACKNTSLN00197 Importance: High

Hi Pieter, Surrey CC has chased me today for an update on our pre-app submissions. Would you be able to come back to me tomorrow and advise on the status of comments? Thanks, Robin Robin Slade Principal Environmental Consultant, Water & Environment ATKINS Find out more about what we do and how we do it – www.atkinsglobal.com

Woodcote Grove, Ashley Road, Epsom, KT18 5BW |

| Web: www.atkinsglobal.com | Careers: www.atkinsglobal.com/careers

From: Slade, Robin Sent: 10 March 2015 11:43

To: 'De Villiers, Pieter'

Subject: RE: Former Thales site (Project Lola) - PACKNTSLN00197

Hi Pieter, From a meeting with Surrey CC and their planning consultant last week I understand they are hoping to receive a decision on the hybrid permission for the former Thales site, Crawley by end of this week (application CR/2014/0764/OUT). We are hoping to submit documents to satisfy the pre-commencement conditions as soon as possible once permission is granted. Would you be able to follow up with John and Karrie and see if we might be able to obtain comments on our draft pre-app documents for end of this week / start of next? This would enable us to make any amendments and submit the documents formally next week once the permission is in place. Many thanks, Robin Robin Slade Principal Environmental Consultant, Water & Environment ATKINS Find out more about what we do and how we do it – www.atkinsglobal.com



From: Slade, Robin Sent: 02 March 2015 12:02

To: Vincent, John; Doust, Karrie Cc: 'De Villiers, Pieter'; 'colber@ ; JLacey@ Greening, Emma; Peter Green; Kevin

Lyons

Subject: RE: Former Thales site, pre-application submissions (CR/2014/0764/OUT)

John / Karrie, Please find attached for your review / comment pre-application submissions pursuant to the following conditions for the development at the former Thales site, Gatwick Road, Crawley (application CR/2014/0764/OUT):

Conditions 6 & 8 – surface water drainage scheme;

Condition 9 – piling risk assessment;

Condition 10 – long term groundwater monitoring and maintenance plan;

Condition 11 – recommendations following the previous ground investigation; and

Condition 12 – drainage construction management plan. We will forward on the submissions for conditions 6 & 8, 11 and 12 to Crawley Borough Council’s Environmental Health and Drainage officers for their comments also. I’d be grateful if you could confirm safe receipt of the attached and advise when you might be able to respond. We’re keen to lodge the submissions as soon as possible following receipt of the formal decision for the main development application. If you need any additional supporting information to assist your review of the attached, please let me know. Best regards,

Robin Robin Slade Principal Environmental Consultant, Water & Environment ATKINS Find out more about what we do and how we do it – www.atkinsglobal.com



From: Slade, Robin Sent: 27 February 2015 09:56

To: Vincent, John; Doust, Karrie Cc: 'De Villiers, Pieter'; 'colber@ ; 'JLacey@ ; Greening, Emma

Subject: Former Thales site, pre-application submissions

Morning John / Karrie, Many thanks again for your time and invaluable support at last Wednesday’s meeting to discuss the water related planning conditions for the former Thales site, Gatwick Road, Manor Royal, Crawley. As discussed last week the project team has prepared a set of concise pre-application submissions relating to conditions 6 – 12, focussing on Parcel 2, where appropriate. As mentioned we would be very grateful for your pre-application comments on these submissions and will be in a position to forward these on later today and Monday next week. At present we have four concise draft submissions; one covering conditions 6 and 8 (surface water drainage) and one each for 9 (piling risk assessment), 10 (long term monitoring plan) and 11 (investigation recommendations). A submission for condition 12 (drainage construction management plan) is still in preparation and, as discussed last week, for condition 7 (unsuspected contamination), which is a compliance condition, we have provided the contractor some text for inclusion in their construction management plan, such that Atkins is contacted in the event unsuspected contamination is identified. I’ll be back in touch later today and Monday with the draft submissions for your review and comment. Please note we have tried to keep these ‘punchy’, whilst covering the key issues so I would hope could be reviewed within the time allowed under the current agreement. Best regards, Robin Robin Slade Principal Environmental Consultant, Water & Environment ATKINS Find out more about what we do and how we do it – www.atkinsglobal.com



Documents

Planning Permission: CR/2014/0764 – Condition 11 ... Permission: CR/2014/0764 – Condition 11: Recommendations within Generic Quantitative Risk Assessment (All Parcels) Technical