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Proposed Sampling Locations and Methodology <br /> Using laboratory results from samples pulled during tank removal <br /> as indicators, we propose to establish one down gradient monitor <br /> well and six sample boreholes (for placement see drawing . <br /> The monitor well will be drilled to 3 feet below the groundwater <br /> interface, A 2" prepacked Channel Pack monitor well and screen <br /> will be installed. The well will be packed with additional sand, <br /> grouted ,and covered. All soil and water from well production <br /> will be saved and analyzed. The well will be evacuated 24 hours <br /> prior to sampling. Since this is a short duration, shallow <br /> monitor well (approximately 15 feet) , a teflon bailer will be <br /> used to acquire samples. samples will be immediately placed in a <br /> set of 4 precleaned 40 milliliter sample vials with a teflon <br /> backed silicone septa in an open top lid. The samples will be <br /> filled completely avoiding all air bubbles. <br /> Soil samples will be taken from locations 10-20 feet from the <br /> center of the original excavation (BH-1,2,3,4) , from updradient <br /> (BH-5) , and 75 feet directly down gradient (BH-6) , in addition, <br /> provisional or alternate boit�oie samples will be taken from 40- <br /> 50 feet from excavation center. These samples will not be <br /> analyzed unless significant contamination is found from nearer <br /> samples. Each soil boring will be excavated using a Clements jNc <br /> • subsoil probe in 36" stainless steel sampling sleeves. Samples <br /> Will be taken at three foot intervals to 15 feet. Each bore <br /> 11 be bQle <br /> samples will be tae in two —K gIMC& Vol l <br /> prec eaned for volatile sampling with an open topped welded <br /> septa silicone/teflon seal. <br /> Samples will be transported to the Eagle-Picher Environmental <br /> Services laboratory in Miami, Oklahoma for analysis. EPES is a <br /> California certified laboratory. The laboratory will analyze <br /> each soil and water sample for BTX&E by EPA method 8020 and TpH <br /> diesel by the california modification of Epp, method 8015 <br /> (GC/FID) . <br /> All of the above activities will be performed under the direct <br /> supervision of a California registered geologist. Data gathered <br /> from this study will be used to develop the required Problem <br /> Assessment Report anf Final Remediation plan. <br /> R <br />