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vv1 vA =—I iV.'SV i'eiS v �" KLFINFELCFR B-2.6 Collection of BAT Probe Groundwater Swuples One-time groundwater samles are collected using a BAT Probe,which is an insitu groundwater sampling device. The borings are first advanced to a point immediately above the desired sampling depth where groundwater is enc entered. A stai.nIms steel drive tip equipped with a stainless steel filter is lowearod into the boring at the end of a 2.5-inch diameter galvanized steel Pipe and pushed ruing the drill rig approximately 6 to 12 inches into the soil/aquifer formation at the bottora of the boring. A sterilized,glass,vacuum sealed sa(((pling 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 drive 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 their hulled cwt of the pipe, disengaging the syringe. The sepluin in the glass ampoule and drive tip reseals after the syringe is remover/. 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 Anse prior to use. New, factory-sterilized syringe needles, 0-rings, septum's and sample tubes are used for each sample, B-2-7 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 h hmatory. A Kleinfelder chain-of-custody form accompanies the cooler. The chain-of-custody form includes Kleinfeldees name, address and telephone number, the =Vloyee 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 walyses for which the smnples are being submitted, if any. The chain-of ceustody 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. B-2.8 Decontamination of Equipment To reduce the potential fol( cross-contar in tion, augers and associated equipment are sty cleaned prior to drilling each boring. In addition, sampling equipment is cleanod with a trisvdiurn phosphate or non phosphate detergent wash and rinsed with distilled water prior to collecting each soil sample. 20-YP 1-56&/2011 P131120110235 Page 19-3 Copyri#ct 2001.Kle hfeMer,Im may 14 2441