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Project No S8080-06-03 January 19, 1996 ' Page 2 ' Groundwater was measured at depths ranging from approximately 51 7 to 54 2 feet below the top of each well casing (TOC) A summary of the top of well casing elevations and groundwater depth measurements and elevations is presented on Table I Well Purging and Sampling ' Prior to purging each well, the purge pump was decontaminated to remove organic compounds from the pump Decontamination was performed by immersing the purge pump into a 30-gallon vessel containing a mixture of water and trisodium phosphate (TSP) The exterior of the pump was washed with TSP solution while simultaneously pumping the solution through the pump and discharge hose into a DOT 17-H 55-gallon drum Rinsing of the pump and discharge hose between each well was accomplished by immersing the ' pump into a second 30-gallon vessel containing rinse water and cleansing and pumping in a manner similar to the first wash, with rinse water also discharged into a DOT 17-H 55- gallon drum Geocon personnel purged approximately three to five well casing volumes of groundwater (7 to 15 gallons) from each of the FDIC monitoring wells on December 14, 1995 utilizing a 2-inch diameter Grundfos submersible pump During the well purging activities, the groundwater was monitored for pH, electrical conductivity and temperature Well sampling ' data sheets are attached Purged groundwater was pumped into DOT 17-H 55-gallon drums which were labeled and stored onsite pending receipt of laboratory analysis and subsequent disposal following regulatory protocols ' Following well purging, groundwater samples were collected from each well using a disposable bailer and decanted into pre-preserved 1-liter amber sample bars and 40-m1 volatile organic analyses (VOA) vials equipped with teflon septums Geocon also removed adequate sample volume from the FDIC wells to fill sample containers provided by Clearwater The samples retained by Geocon were sealed, labeled and placed in an ice chest containing blue ice The Geocon retained samples were transported to Sparger Technology Incorporated (Sparger) using standard chain-of-custody protocol On the same day, representatives from Clearwater purged and sampled wells BMW-1 and BMW-2 using hand bailing techniques Adequate sample volume was provided by ' Clearwater to fill Geocon's well BMW-1 and BMW-2 sample containers Quality Assurance/Quality Control Sam lm A pre-preserved travel blank was provided by Sparger and was placed in the sample cooler during transport to and from the site Additionally, an equipment blank was obtained by