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i <br />2101 Webster Street <br />12th Floor <br />Oakland, CA 94612 <br />(510) 663-4100 • FAX (510) 663-4141 <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 />-' Subject: Work Pbh ­ - - . <br />Soil Borings and Groundwater Samx <br />2449 West Kettleman Lane <br />Lodi, California <br />Dear Mr. Knoll: <br />Per your request, Geomatrix Consultants, Inc. (Geon <br />advance 3 soil borings and collect groundwater samp <br />telephone conversation with you this morning, I undt <br />the San Joaquin County Public Health Services to be <br />the site dated April 15, 1999 (attached). This existin <br />one groundwater monitoring well, which was installs <br />proposed work plan is described below. <br />WORK PLAN <br />Geomatrix will oversee the advancement of three soil <br />shown on the attached figure. The borings will be ad <br />ground surface (bgs) using hollow -stern auger drilling <br />M _ core both visually and with a photoicnizatiori detectei <br />advanced from approximately 45 to 50 feet bgs, the d <br />samples will be collected for chemical analyses. No <br />borings. <br />The groundwater samples will be submitted to a Stats <br />ratory for analyses for benzene, toluene, ethylbenzeri( <br />butyl ether (MTBE) using EPA Method 8020, and foi <br />as gasoline using EPA Method 8015M. One equipmE <br />Geomatrix Consultants, Inc. <br />Engineers, Geabgists, and Environmental Scientists <br />UK <br />/9Q2ia <br />GEOMATRIX <br />rix) is pleased to submit this work plan to <br />at the subject site. Based on my <br />tand that this work will be authorized by <br />;rformed under our existing permit for <br />)ermit was issued for the construction of <br />at the site on April 27, 1999. The <br />)orings at the approximate locations <br />anced to approximately 45 feet below <br />methods. Geomatrix will screen the soil <br />(PID). A Hydropunch sarnpler.will be., <br />pth to first groundwater, and groundwater <br />)il samples will be collected from the <br />)f -California certified analytical labo- <br />and xylenes (BTEX) and methyl tertiary <br />otal petroleum hydrocarbons quantified <br />.t blank also will be collected. <br />