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' 3 2 GROUNDWATER SAMPLING <br /> On December 29, 1997 roundwater samples were collected from monitoring wells MW- <br /> ' 1 throng MW-12, VW-1, and VW-2 Prior to the collection of groundwater samples, the <br /> monitoring wells were purged of a minimum of three well volumes of water and until pH, <br /> conductivity, and temperature stabilized The wells were allowed to recover to at least 80 <br /> ' percent of their original static groundwater levels prior to sampling <br /> The following are procedures for well monitoring, well purging, and water sampling <br /> 1 All equipment was washed prior to entering the well with an Alconox solution, <br /> followed by two tap water rinses and a deionized water rinse <br /> ' 2 Prior tour in the wells, depth-to-water was measured using an Solinst <br /> P 9 g <br /> groundwater interface probe to an accuracy of approximately 0 01 foot The <br /> rmeasurements were made to the top of the well casing on the north side <br /> ' 3 Monitoring wells at the site were prepared for sampling by purging the well of <br /> approximately 3 well volumes of water using a 2-inch or 4-inch diameter polyvinyl <br /> chloride (PVC) bailer <br /> 4 Water samples were collected with a single-use Teflon bailer after the well had <br /> been purged and water in the well had equilibrated to approximately 80 percent of <br /> ' the static water level or 2 hours after well purging, whichever occurred first The <br /> water collected was immediately decanted into laboratory-supplied vials and <br /> bottles The containers were overfilled, capped, labeled, and placed in a chilled <br /> ' cooler prior to delivery to the laboratory for analysis <br /> 5 Chain-of-custody procedures, including chain-of-custody forms, were used to <br /> ' document water sample handling and transport from collection to delivery to the <br /> laboratory for analyses <br /> ' 6 Groundwater s were delivered of the_State-ce fied hazardous waste <br /> laboratory thin approximately 48-hours of collection <br /> ' 7 Purged water was contained in a DOT approved 55-gallon drum The drum was <br /> labeled with the contents, date, well number, client name, and project number <br /> ' The groundwater monitoring purge logs are presented in Appendix A <br /> 2 <br /> ' F TransferlReportSCALTRAN51Ca1ty997V71C171gm497fen <br />