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i ' k'" KLEINFE [ DER ' A-2.5 Collection of BAT Probe Groundwater S_ triples One-time groundwater samples are collected using a BAT Probe, which is an msitu groundwater ' sampling device The bonn s are first advanced to a point immediate) above the desired p g g p Y sampling depth where groundwater is encountered A stainless steel drive tip equipped with a ' stainless steel filter is lowered into the boring at the end of a 2 5-inch diameter galvanized steel pipe and pushed using the drill ng approximately 6 to 12 inches into the soil/aquifer formation at ' the bottom of the boring A sterilized, glass, vacuum sealed sampling ampoule (tube), similar to a standard volatile organics (VOA) vial, is then lowered through the pipe down to the tip with a ' cable Between the tip and the sample tube is a double-sided hypodermic needle (syringe), which simultaneously punctures the seals on the stainless steel dnve tip and the septum of the ' glass sample ampoule The vacuum in the sample ampoule draws groundwater through the tip into the glass ampoule The glass ampoule is then pulled out of the pipe, disengaging the ' syringe The septum in the glass ampoule and drive tip reseals after the syringe is removed To reduce the potential for introducing contaminants into the samples, the drive tip, galvanized pipe, and other equipment used for sample collection are steam cleaned and/or washed with trisodium phosphate or non-phosphate detergent solution and double rinsed with distilled water ' prior to use The sample probe and filters are cleaned in TSP solution and rinsed with methyl alcohol followed by a distilled water rinse pnor to use New, factory-sten lized synnge needles, 0-rings, septums and sample tubes are used for each sample ' A-2.6 Sample Handling ' After labeling, the sample is immediately stored in an iced cooler for transport to Kleinfelder's office sample control or to the analytical laboratory A Kleinfelder chain-of-custody form ' accompanies the cooler The chain-of-custody form includes Kleinfelder's name, address and telephone number, the employee number of the individual who performed the sampling, the ' sample numbers, the date and time the samples were collected, the number of containers each sample occupies, the sample matrix (soil or water) and the analyses for which the samples are being submitted, if any The chain-of-custody form is signed by each person who handles the ' samples, including all Kleinfelder employees and the receiving employee of office sample • control or the analytical laboratory when the samples are delivered 28699 E01 /ST03R627 Page A-3 ' Copyngll 2003,Klemfelder,Inc Apn122,2003