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x _ IRRIME_Nom_ �� <br /> y. <br />"S <br /> 1. H. KLEINFELDER&ASSOCIATES <br /> J.H. Kleinfelder Associates (Kleinfelder) has completed the second phase <br /> of an environmental investigation for A. Teichert b son, Int.'s Stockton <br /> # � equipment facility. The investigation was conducted to assess the lateral <br /> �n and vertical extent of petroleum hydrocarbon migration from an underground <br /> storage tank leak and to assess possible contamination of the underlying <br /> r� <br /> ground water. <br /> A� <br /> Eleven _ exploratory soil borings were drilled and sampled byQ3'efelder <br /> dux3ng this phase of. the .investigation. Three of these borings were <br /> completed as monitoring. wells. Forty-four soil samples and three ground <br /> f<� water samples were analyzed for total petroleum hydrocarbons and for <br /> aromatic hydrocarbons (BTX). soil. permeabilities of aix samples were <br /> determined to eval+sate the hydrocarbon migration and to assess whether �-- <br /> a in-situ remedial measures could be considered. <br /> r_ <br /> The analytical and field data show approximately 1060 yd3 of soil have <br /> been affected by leakage from the underground storage tank(s) <br /> and/or <br /> pipingCalculations indicate approximately 1700 <br /> k:a <br /> associated product piA g- <br /> gallons of gasoline have leaked into the surrounding soil. The leakage <br /> has resulted in ground water contamination with gasoline and related <br /> constituents at concentrations above state action levels. <br /> 62 The soil conditions and dp')th to ground water are not conducive for <br /> optimum application of a biological and/or vapor extraction remedial <br /> system. To evaluate the feasibility of such a system wound require <br /> supporting bench-scale laboratory tests and a small pilot-scale system. <br /> S <br /> The two most viable remedial alternatives appear to be removal and on-site <br /> g8.._. <br /> # landfarming-- -or"removal-and-sail�ssashing--using__.Teichert's_a raga e washing <br /> operation at a nearby Teichert facility. These two alternatives should be <br /> evaluated in more detail. <br /> 6& <br /> 38-87-43 1 <br /> n � ^ <br /> WORM <br />