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Former Unocal Station No 0187 <br /> February 14, 1995 <br /> surveyed to MSL by a California licensed surveyor Horizontal coordinates of <br /> the well locations will also be obtained by the surveyor Elevation data will be <br /> forwarded to MPDS for inclusion in the quarterly groundwater monitoring and <br /> sampling reports <br /> 2„5 Well Development and Sampling <br /> Develop the newly installed groundwater monitoring wells after they have been <br /> allowed to stand a minimum of 48 hours The wells will be purged and sampled <br /> at a minimum of 24 hours after development Groundwater removed from wells <br /> during development and sampling will be stored in drums at the site pending <br /> disposal Well development and sampling procedures are described in Appendix <br /> A <br /> 3 6 Laboratory Analysis <br /> Submit soil samples selected for chemical analyses to Sequoia Analytical of <br /> Sacramento, California (ELAP #1624) Stockpile samples and selected soil <br /> samples from the soil borings will be analyzed for TPHg by Environmental <br /> Protection Agency (EPA) Method 8015 (Modified), and for benzene, toluene, <br /> ethylbenzene, and total xylenes (BTEX) by EPA Method 8020 The stockpile <br /> samples will be composited into one sample and then analyzed for TPHg and <br /> BTEX, and for total lead by EPA Method 6010 (AA) or 7421 (ICAP) <br /> Groundwater samples will be submitted for analysis of TPHg by EPA Method <br /> 8015 (modified) and BTEX by EPA Method 8020. <br /> Task 4. Office Activities <br /> Prepare a report that discusses the field methods utilized, observations made <br /> during the field activities, chemical analytical data from analysis of the soil <br /> samples, and conclusions of the investigation <br /> 482704-1 7 <br /> GeoStrategies Inc. <br />