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J <br /> i £ <br /> A S S O C I A T E S I N C <br /> 1 <br /> additives utilizing EPA 8260 methodology The analytical results for soil samples are <br /> summarized in Table 1 Laboratory data sheets and chain-of-custody documentation are included <br /> ' in Appendix C <br /> 223 Groundwater Monitoring Well Construction <br /> ' Soil boring MW1 was subsequently completed as a groundwater monitoring well to assess <br /> groundwater beneath the site <br /> The well was constructed with 2-inch PVC casing to a depth of 62 feet bgs The screened <br />' interval of the well was positioned from approximately 5 feet above to 10 feet below the <br /> encountered water table to allow for seasonal water level fluctuations The screen slot size is <br /> 0 020-inch The well was completed with approximately 2 5 feet of well casing above grade and <br /> secured with a well monument equipped with a padlock Well construction details are depicted <br /> on the well logs contained in Appendix B <br />' 224 Monitoring Well Development <br /> Groundwater monitoring well MW1 was developed on February 26, 1999 The well was purged <br /> until the extracted water was relatively sediment free Development/purge logs are included in <br /> Appendix D Purge water was temporarily stored on site in 55-gallon drums After fluid levels <br />' had been allowed to stabilize, the groundwater level was obtained from MW 1 The fluid level <br /> was taken on February 26, 1999, utilizing an electronic water probe capable of measuring with an <br /> accuracy of 11100 of a foot Groundwater elevation data are presented to Table 2 <br />' 2_5 Groundwater Sampling and Analysis <br />' On February 26, 1999, a groundwater sample was collected from well MW1 The sample was <br /> collected after purging a minimum of three well volumes and stabilization of electric <br /> conductivity, pH, and temperature Field development/purge logs are presented in Appendix D <br />' Subsequent to purging, groundwater was sampled and transferred to appropriate sample <br /> containers, using a clean, disposable bailer with a bottom-emptying device to reduce <br /> volatilization Sample containers were then labeled with sample identification, placed on ice, <br />' and shipped under chain-of-custody to Sequoia Analytical <br /> The groundwater sample from well MW1 was analyzed by Sequoia Analytical for TPHg, BTEX, <br /> and oxygenates fuel additives Groundwater analytical results are summarized in Table 3, and <br /> laboratory data sheets are presented in Appendix E <br /> w 1112921reportslsumwel doe 3 <br />