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FIE C E I V E D <br /> E:IWIIGROUNDWATER <br /> MAY 17 9HEA�TH <br /> ENVIRONMENTA <br /> ❑ <br /> INC. <br /> PERMIT/SERVICES TECHNOLOGY, INC. 1401HalyardDnve Suite140 West Sacramento CA95691 (916)372-4700 <br /> FAX(916)372-8781 <br /> April 19, 1993 Project No 02020 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 January through March 1993 Groundwater monitoring and sampling were <br /> conducted to determine water table elevation, the thickness of any separate-phase petroleum <br /> hydrocarbons (SP), and the distribution of dissolved hydrocarbons in the 11 monitoring wells (MWs) <br /> at this site Groundwater monitoring data and results of laboratory analyses of groundwater samples <br /> collected on March 18, 1993 are included <br /> WORK PERFORMED <br /> GROUNDWATER MONITORING <br /> Water table elevations at the site increased an average of 2 45 feet from levels reported the previous <br /> quarter The estimated flow direction of the groundwater is divergent from MW-2 but dominantly to <br /> the east and northeast across the site (Figure 1) Table 1 presents a cumulative summary of the <br /> quarterly monitoring events <br /> GROUNDWATER SAMPLING <br /> Prior to water-sample collection, the groundwater monitoring wells were purged until pH, <br /> temperature and conductivity readings were stabilized or until dry (Table 2) A Teflon" sampler, <br /> cleaned with an industrial detergent and distilled water, was used for the groundwater sampling The <br /> water samples were then transferred to 40-milliliter glass vials with Teflon"-septum caps, preserved <br /> Offices throughout the US Canada and Overseas <br />