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ia- <br /> '' Ct <br /> • <br /> is presented in Figure 2. it depicts a south-southeast groundwater gradient at an average of <br /> 0 008 ft/ft or approximately 42 feet/mile Fluid level measurements indicated groundwater <br /> flow direction beneath the site during the first quarter was similar to the last monitoring event <br /> Groundwater monitoring data are summarized in Table 1 <br /> On April 12, 1996, groundwater samples were collected from monitoring wells MW1, MW2, <br /> MW4, MW6 and MW7. Samples were collected after stabilization of pH, electrical <br /> conductivity (EC), and temperature. All wells monitored were purged and sampled according <br /> to Smith Environmental's Quality Assurance/Quality Control Plan on file with the PHS/EHD. <br /> A minimum of three casing volumes of water were removed from each sampled well. Purge <br /> water was contained in labeled DOT approved 55 gallon drums and stored on site pending <br /> laboratory analysis and proper disposal. A dedicated disposable bailer was used to collect each <br /> water sample. Field parameters and purged volumes are shown on well purge logs included in <br /> Attachment 1. <br /> LABORATORY ANALYSIS <br /> Collected groundwater samples were placed on ice and transported under chain-of-custody <br /> protocol to state-certified Argon Mobile Labs in Ceres, California (DOHS Certification No. <br /> • 1873) Samples were analyzed for total petroleum hydrocarbons as gasoline (TPHg), benzene, <br /> toluene, ethylbenzene, and xylenes (BTEX) by EPA methods 8015 modified and 8020, <br /> respectively. Analytical results are presented in Table 2 Laboratory data sheets and chain of <br /> custody documentation are included as Attachment 2 <br /> .,Hh1QR <br /> • <br /> Sian <br />