ARCHIVED REPORTS XR0009408 - Laserfiche WebLink

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and extent of chemicals in the shallow groundwater prior to the installation of monitoring wells Groundwater samples were collected from three of the monitoring wells after the wells had been developed. The wells were developed by ' surging and bailing 10 casing volumes from the wells Water samples were collected using a Teflon bailer Bailers used for development and sampling were cleaned prior to each use ' Groundwater samples collected for BTEX analysis were immediately transferred to clean volatile organic analysis (VOA) vials, filing each completely Care was taken to minimize any agitation of the ' water sample Each sample vial was then capped with a Teflon septum cap such that zero headspace is achieved, and no air bubbles are visible when inverted Groundwater samples collected for TPH analysis were transferred into 1-liter amber glass containers. All the containers, VOA vials, ' and 1-liter amber glass used were labeled with the well number, date, time, sampler's initials, location, and anrequired, were chilled in a cooler Each sample was logged on chain-of-custody ' forms and in a field book. The samples were held in the cooler, accompanied by the appropriate chain-of-custody forms until delivered to the laboratory i Sample Analysis ' Soil samples were analyzed for TPH as diesel and gasoline by EPA Method 8015 modified and for BTEX by EPA Method 8020 Soil ' samples analyzed for TPH were prepared by EPA Method 3550 using sonication Soil samples analyzed for BTEX were prepared using EPA Method 5030 (purge and trap) Total petroleum hydrocarbons in ' soil samples were analyzed and characterized by Gas Chromatography/Flame Ionization Detection (GCFID) with a fused capillary column Water samples were analyzed for TPH as diesel ' and gasoline by EPA Method 8015 modified and for BTEX by EPA Method 602.