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ELAINE <br />—t-+ 985 TIMOTHY DRIVE <br /> TE (408) 995-5535CH <br /> JOSE CA 95133 <br />-r- TECH SERVICES INC FAX (408) 293 8773 <br /> a 93 -off/ <br /> June 7, 1993 <br /> RECEIVED <br /> JUN 1 4 1993 <br /> Shell Oil Company <br /> P O Box 5278 <br /> Concord, CA 94520-9998 <br /> Attn• Daniel T Kirk <br /> srri; <br /> Shell WIC #204-7524-1509 <br /> 141 N El Dorado <br /> Stockton, California <br /> QLARTFR <br /> 2nd quarter of 1993 <br /> QUARTERLY GROUNDWATER SAMPLING REPORT 930526-W-11 <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 evacuanon 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 /> Blaine Tech Services,Inc. 930525-W-1 Shell 141 N £1 Dorado,Stockton page I <br />