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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY Unit Supei-visors <br /> Z. <br /> Heran,R.E.H.S. <br /> Donna K. 304 East Weber Avenue, Third Floor Carl Borginan,R.E.H.S. <br /> Director Mike Huggins,R.E.H.S.,R.D.I. <br /> California95202-2708 I.S. <br /> Al Olsen,R.E.H.S. Stockton, i Douglas W. Wilson. R.E.1 <br /> Program Manager Telephone: (209) 468-3410 Margaret Lagorio, R.E.H.S. <br /> i'F�6'R Laurie ACotulla,R.E.H.S. Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Program Manager Mark Barcellos,R.E.H.S. <br /> ROBERT VAN SPRONSEN <br /> BFC PROPERTY <br /> L <br /> 3501 COFFEE ROAD SUITE 1 <br /> MODESTO CA 95355 FILE COPY <br /> RE: BFC Property - UIC-Septic System Site Code: RO#0001589 <br /> 26237/26239 E. Miller Ave PR#: 523216 <br /> Escalon, CA. 95320 CO#: 0020630 <br /> San Joaquin County Environmental Health Department (SJCEHD) reviewed <br /> Work plan for Contamination Assessment dated March 9, 2005 as submitted by <br /> your consultant Ground Zero Analysis (GZA), Inc on March 11, 2005 and has the <br /> following comments. <br /> This proposal is in response to SJCEHD's correspondence of August 17, 2004. <br /> Since that time, SJCEHD has re-evaluated some of the EPA Methodology <br /> requirements originally included on clandestine drug lab investigations under our <br /> oversight. The following EPA Methods only are to used for this soil/sludge or <br /> water samples: <br /> 1. Volatile Organic Compounds (VOC): 8240 or 8260 (VOC by capillary <br /> column), or a combination of 8010 (Halogenated VOC) and 8020 <br /> (Aromatic VOC) and, <br /> 2. Semi-Volatile Organics: 8270 (Semi-VOC) and, <br /> 3. Total Petroleum Hydrocarbons (TPH): Gasoline by 8015m with 5030 prep <br /> and Diesel by 8015m with 3540 prep and, <br /> 4. Total Recoverable Petroleum Hydrocarbons (TRPH): Liquids by <br /> 418.1/9070A and soils by 8440/3560. <br /> Six (6) soil sampling points were proposed to be collected in the native soil, 1-2- <br /> feet below the tank, D-box, and rock of the leach line trenches. Additionally, one <br /> soil sample was proposed under each of the two, ten-foot deep sumps at the end <br /> of the leach lines and all were to be backfilled with native soil. As discussed with <br /> John Lane of GZA on March 16, 2005, the following modifications are to be <br /> made: <br /> 1. two of the line soil boring locations will have to be relocated to <br /> approximately mid-point of each line, —25-feet from the D-box and, <br /> 2. a neat cement grout (Type 11 cement and water) is to be used to backfill <br /> each soil boring. <br />