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7-7 <br /> BLAINS <br /> 985 TIMOTHY DRIVE <br /> TECH <br /> CA 95133 <br /> (408) 995-5535 <br /> I � <br /> ! ECH SERVICES INC FAX (408) 293-8773 <br /> I i i a l i <br /> 9 <br /> December 20, I993 <br /> Shell Oil Company <br /> P o Box 5278 V <br /> Concord, CA 94520-9998 ] L <br /> Attn Daniel T Kirk <br /> SITE <br /> Shell WIC 9204-7524-4305 <br /> 620 W Charter Way <br /> Stockton, California <br /> QUARTER <br /> 'th quarter of 1993 <br /> 01 <br /> QUARTERLY GROUNDWATER SAIIPLL',;G REPORT 931122-J-1 <br /> This report contains data collected during routine inspection, gauging and sampling of <br /> groundwater monitoring wells per-formed 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 fieldwork 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 /> pnor 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 turbiaity (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 /> Blame Tech Services Inc 93 112 231 Sh,ll 620 W Charler Wav Slocldon page 1 <br />