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a � 27 January 2006 . AGE-NC Project No 98-0500 Page 5 of 10 Ground water monitoring was performed on the renumbered monitoring wells MW-1 through MW-49, except well MW-12 which remained unavailable due to freight stored over the well 3 1 WELL MONITORING AND EVACUATION On 07 December 2005,the depth to ground water in each well was measured to the nearest 0 01-foot relative to the top of each well casing utilizing a Solinst water level meter, the ground water elevation was calculated by subtracting the measured depth to ground water from the surveyed casing elevation (Table 3) On 07, 08, and 09 December, dedicated Waterra tubing or disposable bailers were used to purge a minimum of three casing-water volumes of ground water from each well except wells MW-35 and MW-37, which were purged with a pneumatic-driven pump and '/z-inch tubing Temperature, pH, and conductivity were measured for stabilization at regular purge-volume intervals using an Oakton water analyzer/meter,the field data and logs are provided in Appendix D Purged ground water was containerized in properly labeled, Department of Transportation(DOT)-approved 55 gallon drums and stored on-site pending proper disposal 3 2 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES Ground water samples were collected from each purged monitoring well using the dedicated Waterra tubing or disposable bailer after allowing the wells to achieve a minimum 80%recovery of the pre- purge water volume The samples were transferred into three 40-milliliter (ml) EPA-approved volatile organic analysis(VOA)vials containing 0 5 ml 18%hydrochloric acid solution as a sample preservative,and into one 1-liter amber container without preservative,care was taken to ensure that visible air bubbles were not present in the VOA vials after filling and capping After collection,the ground water samples were properly labeled,placed in a chilled container, and transported under chain of custody to CTEL for analysis for the following constituents TPH-g and total petroleum hydrocarbons quantified as diesel and stoddard (TPH-d and TPH-stoddard, respectively) in accordance with EPA Method 8015 Modified, • BTEX and the fuel additives MTBE,tertiary-butyl alcohol(TBA),di-isopropyl ether(DIPE), ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME), 1,2-dibromoethane (EDB), 1,2-dichloroethane (1,2-DCA), ethanol, and methanol in accordance with EPA Method 8260 and, • Dissolved lead in accordance with EPA Method 6010 • Advanced GcoEnvironmcntal,Inc