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_ l _ <br /> y„ SS y, yll <br /> � l�© <br /> `rGROUNDWATER , tµl 1 , : Lr S <br /> LODE] TECHNOLOGY INC. <br /> 1401 Halyard Drive,Suite 140,West Sacramento,CA 95691 (916)372-4700 <br /> FAX(916)372 8781 <br /> February 3, 1994 Project No 02070 3294 <br /> Mr R R Zielinski <br /> Texaco Environmental Services <br /> 108 Cutting Boulevard <br /> Richmond, CA 94804 <br /> RE QUARTERLY STATUS REPORT <br /> TEXACO SERVICE STATION <br /> 440 WEST CHARTER WAY <br /> STOCKTON, CALIFORNIA <br /> Dear Mr Zielinski <br /> This letter is presented as a quarterly report on groundwater conditions at the site referenced above <br /> for the quarter of October through December 199_' Groundwater monitoring and sampling were <br /> �l conducted to determine groundwater elevation, the thickness of any separate-phase petroleum <br /> hydrocarbons (SP), and the distribution of dissolved hydrocarbons in the sixteen monitoring wells <br /> (MWs) at this site Groundwater monitoring data and results of laboratory analyses of groundwater <br /> samples collected on December 22, 1993 are included <br /> WORK PERFORMED �S <br /> tikeGROUNDWATER MONITORING <br /> Groundwater elevations at the site increased an average of 0 22 foot from levels reported the t/ <br /> previous quarter in all monitoring wells with the exception of MW-1 and MW-2, in which the V <br /> groundwater elevations decreased an average of 0 75 foot The groundwater flow is generally <br /> toward the east across the site at a gradient of approximately 0 003 (Figure 1) Table 1 presents a <br /> cumulative summary of the quarterly monitoring events <br /> GROUNDWATER SAMPLING <br /> Prior to water-sample collection, groundwater monitoring wells were purged until pH, temperature <br /> and conductivity readings were stabilized or until dry (Attachment 1) A Teflon' sampler, cleaned with <br /> an industrial detergent and distilled water, was used for the groundwater sampling The water <br /> samples were then transferred to 40-milliliter glass vials with Teflon'-septum caps, placed on ice, <br /> Offices throughout the U S Canada and Overseas <br />