Our ref: 00020563-00001-247-CK

61" December 2012

,-wsP

[Redacted S.38(1)(b)]North Lanarkshire Council Central Area Office 453 Main Street Coatbridge ML53RS

Dear [Redacted S.38(1)(b)]

Report Review - St. Ambrose High School & Drumpark ASN Secondary School

Further to our review of the Ramboll UK Ltd (Ramboll) validation report relating to the above-referenced site, WSP Environmental Ltd (WSPE) is pleased to provide the following comments.

The following report was provided for our review:

• St. Ambrose High School & Drumpark ASN - Environmental & Remediation Validation Report. RambollUK Ltd, September 2012 (ref: 007764/005311 - 7764.E.EVR.1 B)

WSPE had previously undertaken reviews of URS Corporation (URS) and Ramboll reports related to the site, and our review history is summarised as follows:

ltem(s) Reviewed WSPE Response • Proposed St. Ambrose High School - Letter dated 17'" November

Ground Investigation Report. URS 2008, ref: Corporation Limited (URS), October 12151574/001/70/MB 2008 (Ref#: 49339729).

Summary of WSPE Response/Queries The following issues were identified for clarification:

• Limited number of near-surfacesamples;

• Screening values potentiallyunder/over conservative;

• No information on source I derivationof screening values;

• Potential for drains to be preferentialpathways;

• Assumptions of diminishingconcentrations of groundwaterexceedances;

• Consideration of thin clays and mineentries in downward contaminantmigration; and

• If potable water wells were potentialreceptors.

WSP Environmental UK

4/5 Loohelde view Edinburgh Park Edinburgh

EH129DH Tai: •44 {0)1313442300 Fa><: •44 (0)131 344 2301 hUp:/twww.wspgroup.com Rag, No: 1152332

WSP Group pie Offices worldwide

00020563-00001-247-CK e'" December 2012 Page 11

• It is reported that the conceptual site model has been updated following the development and remedial

works to illustrate the site does not present any residual significant risks to human health. Ramboll note

this to be illustrated in a diagrammatic representation of the Final Conceptual Site Model for Human

Health on Drawing 7764/E/201, although this is not provided.

• While the report does not contain information with regards correspondence and validation in regards to

potential risks to the water environment, WSPE acknowledge Ramboll's intention to discuss these in an

addendum report.

Recommendations

In summary, WSPE consider the validation report to be generally reasonable with only minor queries and suggested text for a response letter is included as an attachment to this letter.

We trust that the above meets your requirements. However, please do not hesitate to contact me if you should have any queries or comments.

Yours sincerely

[Redacted S.38(1)(b)]

Prepared by

Issue 1 -

5th December

2012 [Redacted S.38(1)(b)]

cc [Redacted S.38(1)(b)]

Reviewed and

Authorised by

[Redacted S.38(1)(b)]

Enclosures: Sample Text for Response Letter

[Redacted S.38(1)(b)][Redacted S.38(1)(b)]

[Redacted S.38(1)(b)]