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San Joaquin County DIRECTOR <br /> o No W!y cpDonna Heran,REHS l <br /> ,_ oG Environmental Health Department r' ASSISTANT DIRECTOR <br /> qw,,+ w., 600 East Main Street Laurie Cotulla,REHS <br /> NIy , :` Stockton, California 95202-3029 - PROGRAM COORDINATORS <br /> 4F , Carl Borgman,REHS <br /> q <br /> Website:www.s /ehd Mike Huggins,REHS, RDI <br /> �IFOR �g ov.or 9 Margaret Lagorio, REHS <br /> Phone: (209)468-3420 Robert McClellon, REHS <br /> Fax: (209)464-0138 Jeff Carruesco,REHS, RDI <br /> Kasey Foley, REHS. <br /> T(9( t\ <br /> JAMES M & B LANGSTON <br /> 15820 S HARLAN RD #33 September 27, 2007 <br /> LATHROP CA 95330 <br /> RE: former Langston's Arco Site Code:1503 <br /> 15615 S. Seventh St. RO#00316 <br /> Lathrop, CA. 95330 CUF#: 00367 <br /> WORK PLAN: "2 nd Dual Phase Extraction Feasibility Study Work Plan" <br /> DATED: September 4, 2007 <br /> PREPARED BY: Advanced Geo-Environmental, Inc. - Jessica Rugge. <br /> STATUS: Approved <br /> ADEQUATE AND NECESSARY ELEMENTS OF THE WORK PLAN rH&S i <br /> 25296.10, subd(c)(3)1: <br /> • Test existing well "EW-1" (MW-1) for dual phase extraction (DPE) as <br /> required by the EHD. <br /> • Collect and analyze ground water samples for TPHg by EPA Method <br /> 8015m and BTEX and the fuel additives by EPA Method 826013. <br /> • Conduct a 48-hour DPE pilot pump test (ground water and soil vapor <br /> extraction) to determine area of influence and concentration of <br /> contaminants for a remediation.system design as required by the <br /> EHD. <br /> • Submit a Report of Findings to the EHD. <br /> COMMENTS AND CONDITIONS: <br /> • none <br /> REASONS FOR DISAPPROVAL OF THE WORK PLAN rH&S 25296 10 1 <br /> subd(c)(3)l: I <br /> • none <br /> k <br /> BY: <br /> Michael Infurna, Sen' r REHS. (209) 468-3454 <br /> , 1 <br /> r , <br /> r <br /> [X] electronically transmitted to consultant on:September 27,2007 <br />