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t <br /> it <br /> 1C E <br /> GROUNDWATER <br /> l_,r 38 PM !• 54 <br /> ❑❑ TECHNOLOGY, INC. 1401Halvard Drive,Suite 140,West Sacramento CA 95691,(916)372-4700 <br /> FAX(916)372-8781 <br /> August 6, 1993 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 /> 444 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 April through June 1993 Groundwater monitoring and sampling were conducted <br /> to determine groundwater elevation, the thickness of any separate-phase petroleum hydrocarbons <br /> (SP), and the distribution of dissolved hydrocarbons in the 11 monitoring wells (MWs) at this site <br /> Groundwater monitoring data and results of laboratory analyses of groundwater samples collected <br /> on June 10, 1953 are included <br /> WORK PERFORMED <br /> GROUNDWATER MONITORING <br /> Groundwater elevations at the site increased an average of 1 60 feet from levels reported the t <br /> previous quarter The estimated flow direction of the groundwater is generally toward the east <br /> across the site (Figure 1) Table 1 presents a cumulative summary of the quarterly monitoring <br /> 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 (Table 2) A Teflon" sampler, cleaned with an <br /> industrial detergent and distilled water, was used for the groundwater sampling The water samples <br /> were then transferred to 40-milliliter glass vials with Teflon"-septum caps, placed on ice, and <br /> transported to a California state-certified laboratory, accompanied by a chain-of-custody manifest <br /> Offices throughout the U S,Canada and Overseas <br />