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BLAINE 985 TIMOTHY DRIVE <br /> SAN JOSE CA 9513 <br /> (408) 995 55E <br /> TECH SERVICES INC FAX (408) 293 877-1 <br /> January 19, 1993 <br /> RECEIVED <br /> Shell Oil Company AN L <br /> P O Box 5278 <br /> Concord, CA 94520-9998 <br /> �",�� -aaa • Rim <br /> Atm Daniel T Kirk <br /> I <br /> sm <br /> Shell WIC # 204-7524-2408 <br /> 4445 Pershing Avenue <br /> Stockton, California <br /> QUARTER <br /> 1st quarter of 1993 <br /> QUARTERLY GROUNDWATER SAMPLING REPORT 930111-T-1 <br /> This report contains data collected during routine inspection, gauging and sampling of <br /> groundwater monitoring wells performed by Blaine Tech Services, Inc in response to the <br /> request of the consultant who is overseeing work at this site on behalf of our mutual client, <br /> Shell Oil Company. Data collected in the course of our field work is presented in a <br /> TABLE OF WELL GAUGING DATA The field information was collected during our <br /> preliminary gauging and inspection of the wells, the subsequent evacuation of each well <br /> prior to sampling, and at the time of sampling <br /> Measurements taken include the total depth of the well and the depth to water. The surface <br /> of the water was further inspected for the presence of immiscibles which may be present as <br /> a thin film (a sheen on the surface of the water) or as a measurable free product zone <br /> (FPZ) At intervals during the evacuation phase, the purge water was monitored with <br /> instruments that measure electrical conductivity (EC), potential hydrogen (pH), tempera- <br /> ture (degrees Fahrenheit), and turbidity (NTU). In the interest of simplicity, fundamental <br /> information is tabulated here, while the bulk of the information is turned over directly to <br /> the consultant who is making professional interpretations and evaluations of the conditions <br /> at the site <br />• <br /> Blaine Tette Servioes Inc 930111-T-1 Shell 4445 Pershing,Stockton page 1 <br />