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1 <br /> The bailer used to sample each well was attached to new thin nylon line, lowered into the well <br /> by hand, filled and brought to the surface The water in the bailer was carefully poured into <br /> ' laboratory prepared 1000 milliliter plastic bottles and 40 milliliter glass bottles (VOA vials) <br /> which were then capped with teflon lined caps Samples were labeled with stick-on labels filled <br /> out in indelible ink with the following information <br /> ' Site name <br /> Date collected <br /> ' Time collected <br /> Sample ID <br /> Sampler's initials <br /> ' Analysis required <br /> Samples were sealed into ziplock baggies and placed with ice in an insulated chest for delivery <br /> ' with a chain-of-custody document to the WESTON Analytics' laboratory in Stockton, California <br /> This laboratory is certified by the State of California to perform the required analyses Samples <br /> were submitted for analysis by EPA Method 239 2 for Soluble Lead, EPA Method 8015 <br /> ' (Modified) for Total Petroleum Hydrocarbons as Gasoline (TPH-G) and by EPA Method 8020 <br /> for benzene, toluene, ethylbenzene and xylenes (BTEX) <br /> ' Quality control/quality assurance procedures consisted of the collection of a blind duplicate <br /> sample and an equipment decontamination rinsate sample The duplicate water sample was <br /> collected concurrently with sample MW-1 and was given the fictitious well/sample name MW-8 <br /> This sample was scheduled for analysis of BTEX only The equipment decontamination sample <br /> was collected from the bailer after the bailer had been decontaminated after collecting sample <br /> ' MW-1 The bailer was filled with distilled water which was then poured into the sample bottles <br /> The equipment decontamination sample was designated with the fictitious well/sample name <br /> MW-9 and was scheduled for analysis of BTEX only All of the samples were placed into the <br /> ' insulated cooler at the time of collection and were submitted to the laboratory on the same day <br /> they were collected <br /> ' The sample bailer was thoroughly decontaminated prior to and after each use to prevent cross <br /> contamination of samples The thin nylon line used to lower the bailer was removed and <br /> discarded after each use Decontamination of the bailer consisted of an initial wash with an <br /> ' alconox water solution, followed by a potable water rinse and a final rinse with distilled water <br /> The top of each PVC well casing was surveyed to establish the elevations of those wells relative <br /> ' to an arbitrary datum of 100 feet Using the well casing elevations and the measured depths to <br /> water, the relative groundwater elevation at each well was calculated <br /> ' The purge water and decontamination nnsate were containerized in 55 gallon drums which were <br /> labeled and left onsite All field activities were performed in accordance with WESTON's site <br /> specific health and safety plan which was available onsite during field activities The field work <br /> for this protect was performed under Level D personal protection <br /> ' MCWrSNESMUD3RD WP A - 2 11106192 <br />