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a ESE did not mention visual floating product observation In their monitoring well sampling <br /> protocol. TreaTek suggests that this be conducted. <br /> a ESE did not specify the proposed sample analysis method for Total Purgeable <br /> Hydrocarbons. TreaTek suggests OOHS Method 0016. <br /> 0 ESE Is not analyAng any samples far Tetraethyl or Total Lead, TreaTek recommends that <br /> Total Lead analyses be conducted for all soil samples analyzed Detection, or the lack of <br /> detection, of lead would be indicative of the source of any demctatl petroleum related <br /> ompound(s). <br /> o ESE has recommended EPA Analytical Methods 0010 and 010.1 for the drummed rinsate <br /> water and soil cuttings. These analyses are unacceptable as the constituents of gasoline <br /> will net Identified (primarily BTl(ILE and the volatile fractions of gasoline). TreaTek <br /> recommendsthe use M EPA Methods SWO (soils)/602 (water) and DOHS Method 001E to <br /> adequately characterize the drummed tinsale/soll cuttings. <br /> 0 ESE stated in the work plan that the local groundwater flow direction is north-mmilw rst, vet <br /> their drawing contained in the work plan shows a groundwater direction avow pointing <br /> so maresl. Additionally, since the greatest distance between any of the proposed wells Is <br /> approximately forty-three feet and the depth to water will be measured to the nearest <br /> hundredth ot a tom, the groundwater gradient must be greater than 0.023 inches per 100 <br /> teal to be measurable. A flatter gradient than this may exist at the site and the <br /> determination of the site gradient may not be achievable. TreaTek recommends that the <br /> upgradiem well (MW1) be moved 10 to 12 feet east. <br /> 0 Finally, ESE seems to have the impression that TrerTek's initial continuation sampling event <br /> W the property was conducted in an attempt to provide for site characterization. This, quite <br /> frankly, is ts er. TreaTek's activitks were conducted to provide an indication of either <br /> the exisronceof, oor the lack of, petroleum hydrocarbon compound residues within the <br /> shallow site soils. Alan, TreaTek followed all applicable EPA and State sample collection <br /> protocols real documentation procedures for this sample collection effort. <br /> Should signer you or ESE have any questions regarding these comments, please feel free to call <br /> Sincerely, <br /> TreaTek Inc. <br /> Erik A. BEA, PEP <br /> Mann <br /> Protect Manager <br /> EAE/kc <br />