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BLAINE <br /> 985 TIMOTHY DRIVE <br /> SAN JOSE CA 95133 <br /> (408) 995-5535 <br /> TECH SERVICES INC FAX (408) 293-8773 <br /> RECEIVED <br /> OEC 12 <br /> ja December 7, 1994 <br /> Shell Oil Company AW_ I <br /> P O Box 4023 <br /> Concord, CA 9454 <br /> Attn Lynn Walker <br /> SITE <br /> Shell WIC 9204-7524-I509 <br /> 141 N El Dorado <br /> Stockton, California <br /> QUARTER <br /> 4th quarter of 1994 <br /> QUARTERLY GROUNDWATER SAMPLING REPORT 941114-L-2 <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 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 /> Blaine Tech Services,Inc 941114-U2 Shell 141 N BI Dorado,Stockton page 1 <br />