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Site Background Canepa's Car Wash,Park Street Page 7 of 7 Laboratory analytical results indicated that MTBE was detected in the groundwater samples collected from MW-1, MW-3, MW-4, MW-6, and MW-7 at concentrations of 1 1 µg/L, 1 8 µg/L, 1 0 }ig/L, 3 5 µg/L, and 2 0 }ig/L, respectively MTBE was not detected at or above elevated detection limits of 10 0 µg/L and 50 0 µg/L in the groundwater samples collected from MW-2 and MW-5, respectively Laboratory analytical results indicated that 1,2-DCA was detected in the groundwater sample collected from MW-5 at a concentration of 72 gg/L The January 2005 monitoring event is the first time that 1,2-DCA was detected in any of the monitor wells at the site The average depth to groundwater in the monitor wells was 28 52 feet below the surveyed well collar measuring points on January 13, 2005, 0 56 foot higher than measured during the previous quarter The groundwater elevation contours indicated that the groundwater gradient was variable across the site, but generally toward the north Quarterly groundwater monitoring activities were conducted on April 12, 2005 The laboratory analytical results for the groundwater samples collected from monitor wells MW-1, MW-3, MW-4, MW-6, and MW-7 indicated that BTEX constituents were not at or above laboratory-reported detection limits in those samples BTEX constituents were detected at moderate concentrations in the sample collected from MW- 2, and at relatively elevated concentrations in the sample collected from MW-5 TPH-G was detected in MW-2 and MW-5 at concentrations of 4 6 mg/l and 45 mg/L, respectively Laboratory analytical results indicated that MTBE was detected in the groundwater samples collected from MW-1, MW-3, MW-4, MW-6, and MW-7 at concentrations of 1 0 pg/L, 2 1 gg/L, 1 2 pg/L, 5 1 gg/L, and 1 5 pg/L, respectively MTBE was not detected at or above elevated detection limits of 5 0 µg/L and 50 pglL in the groundwater samples collected from MW-2 and MW-5,respectively Laboratory analytical results indicated that 1,2-DCA was detected in the groundwater sample collected from MW-4 and MW-5 at concentrations of 0 7 pg/L and 140 pg/L The April 2005 monitoring event is the second time that 1,2-DCA was detected in any of the monitor wells at the site The average depth to groundwater in the monitor wells was 27 10 feet below the surveyed well collar measuring points on April 12, 2005, 142 feet higher than measured during the previous quarter The groundwater elevation contours indicated that the groundwater gradient was variable across the site, but generally toward the north P 12000_prJ12038 Canepa ParkU038B Canepa Park\ReportslReportsMMB Canepa's July 2005 3rd gmrl5ite Back for July 2005 3rd doc