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05/04/99 TUE 15:05 FAX 415 434 1805 <br />21Q1 Weboter Street <br />'12th Floor <br />Oakland, CA 94S12 <br />15101 563-4100 - FAX (010) 662-4141 <br />May 4, 1999 <br />Project 5360 <br />Mr. Harlan Knoll <br />San Joaquin County public Health Services <br />P.O. Box 388 <br />Stockton, California 95201-0388 <br />GEONATR I X <br />Subject: Work Plan <br />Soil Borings and Groundwater Sampling <br />2449 West Kettleman Lane <br />Lodi, California <br />Dear Mr. Knoll: <br />Per your request, Geomatrix Consultants, Inc. (Geomat-ri <br />advance 3 soil borings and collect groundwater samples <br />telephone conversation with you this morning, I understm <br />the San Joaquin County Public Health Services to be perl <br />the site dated April 15, 1999 (attached). This existing pe <br />one groundwater monitoring well, which was installed at <br />proposed work plan is described below. <br />WORKPLAN <br />Geomabix will oversee the advancement of three soil bol <br />shown on the attached figure. The borings will be advan <br />ground surface (bgs) using hollow -stem auger drilling mi <br />core both visually and with a photoionization detector (P <br />advanced from approximately 45 to 50 feet bgs, the deptl <br />samples will be collected for chemical analyses_ No soil <br />borings. <br />n <br />Q 002 <br />/J*�a <br />GEOMATFIIX <br />is pleased to submit this work plan to <br />the subject site. Basad on my <br />J that this Work will be authorized by <br />rmed under our existing permit for <br />nit was issued for the construction of <br />ie site on April 27, 1999. The <br />rigs at the approximate locations <br />sd to approximately 45 feet below <br />hods- Geomatrix will screen the soil <br />)). A Hydropunch sampler will be <br />to first groundwater, and groundwater <br />amines will be collected from the <br />The groundwater samples will be submitted to a State -of California certified analytical labo- <br />ratory for analyses for benzene, toluene, ethylbenxene, and xylenes (BTEX) and methyl tertiary <br />butyl ether (MTBE) using EPA Method 8020, and for total petroleum hydrocarbons quantified. <br />as gasolinc using EPA Method 8015M. One equipment blank also will be collected_ <br />Geomatrix Consultants, Inc. <br />Engineers, Gealagists, and Environmental Scientists <br />