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BLAiivE <br /> TIMOTHY DRIVE <br /> SAN JOSE CA 95133 <br /> SERVICES <br /> 995-5`535 <br /> TET SERVICES INC 29�773 <br /> September 15, 1993 _ ' <br /> FlfK��_ <br /> Shell Oil Company <br /> P O Box 5278 <br /> Concord, CA 94520-9998 <br /> Attn Lynn Walker <br /> SITE <br /> Shell WIC #204-7524-1509 <br /> 141 N El Dorado <br /> Stockton, California <br /> QUARTER <br /> 3rd quarter of 1993 <br /> QUARTERLY GROUNDWATER SAMPLING REPORT 930825-C-3 <br /> This report contains data collected during routine Inspection, gauging and sampling of <br /> groundwater monitoring wells performed 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 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 /> Blau*Tai Semcm Inc 930826-C-3 Shell I41 N El Dorado,Stockton page 1 <br />