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eu BU <br /> szEr ;9 L .--' • .3c '^ '''�> x • •z - �$^XI`=a^.t. "s• r-}q� .• .w:.: <br /> E <br /> I � � 2.4 SAMPLING A14D ANALYSIS OF GROUND WAM <br /> The two new groundwater monitoring wells K47 and MW8 were <br /> developed by :;urging with a surge block and purging with clean PVC <br /> bailers to remove turbid wator. MW7 and MWb were sampled with the <br /> other six existing monitoring wells. Ten to fifteen gallons of <br /> water representing three casing volumes were purged from each well <br /> with clean PVC bailers, Clone of the wells purged dry. The p1l, <br /> w <br /> conductivity, <br /> and temperature ware monitored for stability as the <br /> wells were purged. <br /> The groundwater was sampled with clean Teflon bailers. Samples of <br /> e. <br /> groundwate- were poured from the bailers into 40 ml VOA vials that <br /> contained hydrochloric acid as a preservative. The water was <br /> scaled with no apparent entrained air in the vials with caps that <br /> included a Teflon septum. The vials were labeled and placed cn <br /> ice in a cooler for stcrage and transport. The refrigerated <br /> 3 samples were submitted under chain-of-custody to Face Laboratories <br /> to be analyzed by DNS modified EPA Method 8015 for TP}{ and by EPA <br /> Method 8020 for BTEX. <br /> 2.5 DEPTHS TO WATER <br /> All wells were located relative to the site boundaries, and the <br /> elevations of the tops of casing were surveyed with a Lietz <br /> automatic level and stadia rad. Elevations were surveyed relative <br /> ( to A bolt on a fire hydrant in the sidewalk adjacent to E1 Dorado <br /> Street that was used as the reference datura. Depths to <br /> groundwater were measured with an Oil P.ecovery System optical <br /> k interface probe. <br /> s" <br /> x <br /> E <br /> �j( <br />