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{ <br /> Ms. Margaret Lagorio <br /> Page 2 <br /> elevations were calculated by measuring the depth to groundwater in each well and subtracting from <br /> the respective wellhead elevation. Groundwater at the site fell an average of 0.57 feet since last <br /> monitored on March 11, 2002. Groundwater elevation data are summarized in Table 1. <br /> Prior to sampling, monitoring wells MW 1 and MW2 were purged of a minimum of three well casing <br /> volumes. During the purging process temperature, pH and electrical conductivity parameters were <br /> measured. Samples were collected after parameter stabilization and an 80% minimum water level <br /> recovery of pre-purge levels. The samples were subsequently placed into an ice chest refrigerated to <br /> a temperature of approximately 4°C. Purge water was contained in appropriately labeled DOT- <br /> approved 55-gallon drums. Purge logs are included in Attachment A. <br /> Groundwater samples were delivered under chain of custody protocol to Argon Laboratories (ELAP <br /> #2359). Analysis consisted of gasoline oxygenate additives, EDB and 1,2 DCA using EPA method <br /> 8260, BTEX using EPA method 8020, and TPHg using EPA method 8015 modified. <br /> Soil Disposal <br /> On June 28, 2002, Jim Thorpe Oil, Inc. removed and transported four 55 gallon drums of waste soil <br /> to Forward Landfill for disposal. Documentation is included in Attachment B <br /> GROUNDWATER ANALYTICAL RESULTS <br /> • TPHg and BTEX constituents continue to be below method detection limits (MDL) in both MW 1 <br /> and MW2. MTBE was not detected in well MW2 for the fourth consecutive event. MTBE was <br /> detected at a concentration of 53 parts per billion (ppb) in well MW L No other gasoline <br /> compounds, oxygenate additives, EDB or 1,2 DCA were detected in either well. Analytical data are <br /> summarized in Table 2. Laboratory reports and chain of custody documentation are included in <br /> Attachment C. <br /> SUMMARY <br /> • Wells MW1 and MW2 were monitored and sampled for TPHg, BTEX, gasoline oxygenates, <br /> EDB and 1,2 DCA. Depth to water measurements indicated a fall in the potentiometric surface <br /> since the last monitoring event. <br /> • Contaminants of concern continue to be below MDLs in well MW2. <br /> • The concentration of MTBE in well MW 1 increased somewhat since the last monitoring and <br /> sampling event; however, the magnitude of the MTBE concentrations in this well has remained <br /> stable since 1996. <br /> • <br /> \1GZA FSISYSOI1Data1GAOLMDZEIVALLEYMQMR12QM2002.doc <br /> i <br />