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DLIL <br /> GOLDEN TATE EivyIRawwrAL <br /> Cultural,Environmental& Litigation Support Services 403 IV,Broddw�4 Fourth floarSan Diega,Cf 92101 <br /> Certfled SDA B(a)/5DVOSB(DCBE)I WBEI SBE Phone:(619)73 7-9031/ra r.(888)310.3390 <br /> G <br /> March 11,2x05 <br /> cn :o <br /> Californii, Regional Water Quality Control Board y n r <br /> Cen.ual Valley Region .. m <br /> 11020 Sun Center Tuve,# 200 <br /> CIO <br /> Sacramento, CA 95670 <br /> RL: Comments to "Work Plan for Soil Vapor Assessment"Authored by Secor—Dated 25 <br /> FebruuT 2005--Pertaining to the L&bf OU—Stockton Parcel 2A <br /> Alin.Mr. Devry bwir <br /> D=Ivfs,Lewis: <br /> On behalf of the City of Stockton's Departmeat of Housing and Redevelopment(RM)Vit)wbich is <br /> acting pursuant to the authozity provided in Heald3&-Safety Code Sections 33459 et.seg.and in <br /> furtherance of the Poianco Act Oversight A.greementbehveen the California Regional Water <br /> Quality Control Board—Central Valley Region(Board)and RDA for the project know as the <br /> Unocal L8dtif Remedia don Project,Golden Suare Envlroamenrul(GSE)is pleased to provide <br /> comments to the"Work Plan for Soil Vapor Assessment"(Work PIan)prepared by Secor,dated <br /> 25 February 2005- These comments are provided to the California Regional Water Quality <br /> Control Board--Central Valley Region(Board)for review and incorporation with other <br /> comments,if any,by the Board and the Department of i'oxic Substances Control(DTSC),and <br /> subsequent submittal,to Secor,for incorporation and/or comment by Secor prior to approval of <br /> the Woxl:Plan. <br /> Tbc Work Plan includes a site and vicinity description,a summary of previous investigations and . <br /> remedial actions,and a scope of work for soil vapor assessment After GSE's review of the <br /> Work Plan,we have the following comments, <br /> 1. Pre-field activities include distribution of a Public Notice Document(PND) to residents <br /> of the Delta View Apartments,with review and-approval by DISC prior to distrl-bu ion. <br /> The Work Plan needs to be modified to include review of the PND by the RDA,prior to <br /> distribution. <br /> 2 The SVE Inlet Nionitoring(page 7)indicates that system efficiency and effectiveness will <br /> be"accomplished by periodically monitoring inlet concentrations in each of the SVE <br /> wells,as well ns measuring induced vucuuxn for SVE and other raaonitoxing wells at the <br /> Site." A table presenting sampling locations and periodicity(daily,weekly,monthly,etc.) <br /> would assist in understandiag the integration of sampling data that will be collected, <br /> Las Angeles,Meva&City end San Diego Goldca Stat+Envi==eatsl <br /> J7f.^t.bi'W:.:'!,,.�i.a'_)1'CL--�/hh,llllrlfiN:�•l ._ <br />