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ELAINE <br /> 985 TIMOTHY DRIVE <br /> SAN JOSE CA 95133 <br /> (408) 995-5535 <br /> TECH SERVICES INC FAX (408) 293-8773 <br /> RECEIVED September 17, 1993 <br /> Shell Oil Company SEP 2 71993 <br /> P O Box 5278 <br /> Concord, CA 94520-9998 <br /> X15�..-------._I <br /> Attn Daniel T Kirk <br /> SITE <br /> Shell WIC X204-7524-2408 <br /> 4445 Pershing Avenae <br /> Stockton, California <br /> QUARTER <br /> 3rd quarter of 1993 <br /> QUARTERLY GROUNDWATER SAMPLING REPORT 930826-C-I <br /> This report contains data collected dunng routine inspection, gauging and sampling of <br /> groundwater monitoring wells performea by Blaine Tech Services, Inc in reponse 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 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 inter�als during the evacuation phase, the purge water was monitored with <br /> instruments that measure electncal conductivity (EC), potential hydrogen (pH), tempera- <br /> ture (degrees Fahrenheit), and turbicit_y (NTL) 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 .,,no is making professional interpretations and evaluations of the conditions <br />. at the site <br /> Blaine Tech Services.Inc 930826-C 1 Shell 4445 Pershing Ave Stockton page i <br />