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TABLE A-2 <br /> Field Groundwater Parameter Measurements <br /> End of Purge Values <br /> January 26, 1993 <br /> Well/Sample I D pH Temperature (°F) Conductivity(umhos) <br /> MW-1 - NS' NS NS <br />' MW-2 NS NS NS <br /> MW-3 NS NS NS <br /> MW-4 733 646 360 <br /> 1 NS = Not sampled due to dry well <br /> To sample the well, a precleaned bailer was lowered into the well, filled, and brought to the <br /> surface The water in the bailer was carefully poured into laboratory prepared glass bottles <br /> which were then capped with teflon lined caps The sample was labeled with stick-on labels <br /> filled 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 /> Sample containers were individually sealed in resealable, ziplock plastic bags and placed with <br /> ice in an insulated chest The sample was hand-delivered with a chain-of-custody document on <br /> the day of collection to the WESTON Analytics' laboratory in Stockton, California This <br /> laboratory is certified by the State of California to perform the required analyses. The sample <br /> was submitted for analysis of total petroleum hydrocarbons as gasoline (TPH-G) by EPA Method <br /> 8015 (modified), and benzene, toluene, ethylbenzene, and xylene(BTEX) by EPA Method 8020 <br /> The bailer used to sample the well was decontaminated prior to use by an initial wash in an <br /> alconox-water solution with a stiff bristle brush, followed with a potable water rinse and a final <br />' spray rinse with distilled water The well sounding device was decontaminated in a similar <br /> manner prior to use at each well The thin nylon line used to lower the bailer into the well was <br /> 1 disposed of after each use Purge water and decontamination nnsate were transferred into a 55- <br /> gallon drum and stored onsite pending the analytical results <br />' nIX\RPrsWCMAPi WP A-2 0.115/97 <br />