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' Eckert Cold Storage Company <br /> P Y <br /> 757 Moffat Blvd, Manteca, California May 5, 1995 <br /> ' Underground Tank Investigation, Phase I Report of Findings Page: 4 <br /> taken at intervals of not more than 5 feet m order to evaluate the subsurface materials, <br /> however, this sampling interval was waived in saturated sands in which sample <br /> recovery was not possible <br /> ' The soil samples were taken using a Californta Modified Split Spoon sampler with <br /> brass liners The sampler were driven continuously by the overdrilling method <br /> Soil samples collected for analysis were analyzed using EPA method 8020 for <br /> BTX&E, method 5030/LUFT for TPH Gasoline and 3550/LUFT for TEPH <br /> (Kerosene, Diesel and Motor Oil) Analyses were conducted by GeoAnalytical <br /> ' Laboratories,Inc, a State-certified lab in Modesto, California <br /> ' 3.S Groundwater Sampling <br /> A travel blank provided by the laboratory accompanied the sample vials from the time <br /> ' they are picked up from the lab to the time they are delivered to the lab This travel <br /> blank is listed on the Chain of Custody, but was analyzed only if all samples contained <br /> the same contaminants <br /> b <br /> All sampling equipment including the pump, bailer, and cables, used y sampling <br /> p g <br /> ' personnel, were disassembled, if appropriate, and steam-cleaned prior to <br /> commencement of sampling These procedures were followed between each well, <br /> sampling point, and at the end of the sampling day De-ionized or organic-free water <br /> ' (also provided by the laboratory)was then introduced into the pump or bailer as a final <br /> stage of cleaning This water was then pumped or gently poured into sample vials to <br /> be used as pump or bailer blanks These blanks were tested only if their corresponding <br /> ' samples are found to contain contaminants <br /> Immediately prior to sampling, water levels and well depth measurements were taken <br /> ' in all wells at the site Each well was evacuated using a stainless steel bladder pump, <br /> which does not introduce air into the water column, or a Teflon bailer The pH, <br /> temperature, and electrical conductivity of the water was monitored as the well was <br /> evacuated These parameters were noted on a Field Log Instruments calibrated to <br /> known standards were used to monitor these parameters <br /> At least three well volumes were evacuated from each well, and more, if necessary, <br /> until the above parameters had stabilized Wells that were de-watered before <br /> ' evacuation of three well volumes had been accomplished were sampled upon eighty <br /> percent recovery of the initial water level The wells or other sampling points were <br /> sampled in order of the least to the most contaminated, as best known or estimated <br /> The samples were pumped from a stainless steel bladder pump or carefully poured <br />