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03/21/2006 10 :33 FAX 408 232 2801 EARTH TECH [a002/003 <br /> California Regional Water Quality Control Board <br /> • Central Valley Region <br /> RobortSchael r Chair <br /> Arnold Sehwarzeaegger <br /> Sacramento Main Office v/anttewall Governor <br /> klaa C.Lloyd Pb-P, MtlraametAddMW p <br /> Secretar :IlwwN.warmMatde.cago eY <br /> Y for 11020 sun Canter Drive#200 Rcndno Cordova,CA 95610.6114 <br /> 6nvira0me0t>tl monc(916)4643291 Fox(916)464-4791 <br /> Frotecdoa <br /> 16 February 2006 <br /> Mr, Thomas Bauhs Ms. Kitty WaucerStockton Department of Housing&Redevelopment <br /> Chevron Environmental Management Company 305 North El Dorado Street,Suite 200 <br /> P.O. Box 6012 Stockton, CA 93202. <br /> San Ramon, CA 94593-0904 <br /> WORK PLAN REVI VV, SOUTH SHORE PARCEL 2A,666 WEST WEBER AVENUE, <br /> STOCKTON,SAN JOAQUYN COUNTY <br /> Staff of the Central Valley Regional Water Quality Control Board(Central Valley Water Board) Work <br /> reviewed the 24 January 2006 Additional Soil Vapor Samplingoperable Work <br /> a Delta view Apartment (Work <br /> plan) submitted by garthTeeh on behalf of the L&o the e Stockton Rest Weber <br /> Avenue, <br /> Agency(RDA) <br /> (site). The site is a portion of Area 2A belonging City <br /> as identified within the City's 13 September 2000 Environmental <br /> sthe site astgr behalf Plan. Cse v and any and all the <br /> n Environmental <br /> Management Company(Chevron) is conducting cleanup a <br /> other responsible parties. The scope of work contained in the Work Plan states: <br /> ­Install a soil gas probe(SV-26)in the vicinity of former soil gas location SV-25 to a depth of five <br /> feet below,ground surface (bgs); <br /> • Install 3 additional soil gas probes (SV-27, SV-28, SV-29) approximately 10 feet out radially in a <br /> trianglilar pattern from SV-25 to a depth of five feet bgs; <br /> Collect and analyze soil vapor samples for H2S [hydrogensulfide)by <br /> data to ASTM Method D-5504, <br /> f t5he4,a and <br /> for methane by ASTM Method r3.1946, and provide QA/QCfl quality <br /> and <br /> Summarize the results in a letter report submitted to RWQC$•" <br /> Central Valley Water$pard staff concur with the elements of the work Plan and Chevron should <br /> proceed with its implementation. If you have any questions regarding p wetter r ared ds ca iti nal <br /> information,you may contact me at(916)464-4682 or by ernail at <br /> A. Lv <br /> MARY SERRA Store <br /> private Sites Cleanup Unit Unit* 14" / Code; ��A Calor p <br /> Description: =6! 't�f^' 41"a M L- <br /> cc list;see next page 5e,// vA Pato 5.4 f/04,,6-�, <br /> Calevrnla Lravironrnental Protection Agency <br /> 0 Rec}KtedPaper <br />