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Pu <br /> . GOLDV STATE ENVIRONMCNTAL <br /> Cultural,Environmcatat& Litigation Support Services J03Jr.Broadway,Faurd,Moor So,Diesa.CA92101 <br /> CerIftdSDA B(a)IS'OVO (DFBEJ/WRE/SBE Plroar:(61DJ 7!7-903(/Fmc-18d8J 320.7390 <br /> L <br /> Match 11, 2005 <br /> Cahfornia Regional Water Quality Control Board _ m <br /> Ccatral Valley Region o <br /> 11020 Sun Center Drive,#200 F� <br /> Sacramento, CA 95670 <br /> RL: Comments to"Work Plan for Soil Vapor Assessment''Authoted by Secor—Dated 25 <br /> February 2005—Per in„g to the L&ivr OU—Stockton Parcel 2A <br /> /lore:!vis. Deem Lewis <br /> Darr bis.Lewis: <br /> On bebnIf of the City of Stockton's Departrucat of Housing and Redevelopment(RDA)which is <br /> acting pursuant to the authority provided in Health&Safety Code Sections 33459 at seq.and in <br /> furtherance of the Polanco Act Oversight Agreement betwem the California <br /> ter <br /> duality Control Beard—Central Valley Region(Board)and RDA �eproject known <br /> • s the <br /> Unocal-L&bf Remediation Project,Golden State Environmental(GSL-)is pleased to provide <br /> comments to the"Work Plan for Soil Vapor Assessment"(Wort Plan)prepared by Secor,dated <br /> 25 February 2005. These comments me provided to the California Regional Water QualiL,v <br /> Control Board—Central Valley Region(Board)for retdew and incorporation-with other <br /> comments,if any,by the Board and the Department of Toxic Substances Control(D7SC),Dad <br /> subsequent submittal to Secor,for incorporation and/or comment by Secor prior ro approval of <br /> the Work P1ao. <br /> The Work Plat includes a site and vicinity description,a summary of previous investigations and . <br /> remedial ocdons,and a scope of work for soil vapor assessment After GSE's review of the <br /> WOr:k Plan,we have the following comments, <br /> 2_ Pre-field activities include distribution of a public Notice Document(PNID) to residents <br /> of the Delta View Apartments,with review and approval by DISC prior to distribution. <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 tvfonimring(page 7)indicates that system efhcicacy and effectiveness will <br /> be"accomplished by periodically monitoring inlet concentrations is each of the SVE <br /> wells,as well as measuring induced vacuum fox SM and other moaitoriag wells at the <br /> Site." A table presenting sampling locations and periodicity(daily,weekly,montbly,etc) <br /> would assist in uadwtandiag the integration of sampling data that will be collected, <br /> Las Angeles,NeV2 a City tad San Diego Golden State Emimamcotal <br /> l.li..r rv,-ur:::'_Jb.�':;f+;i�1Fr:,II}v'N•ir,:SI d. <br />