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Site Background
<br /> Canepa's Car Wash,Park Street
<br /> Page 7of8
<br /> Laboratory analytical results indicated that MTBE was detected in the groundwater samples collected
<br /> from MW-1, MW-3, MW-4, MW-6, and MW-7 at concentrations of 1 1 jig/L, 1 8 µg/L, 1 0 gg/L, 3 5
<br /> gg/L, and 2 0 gg/L, respectively MTBE was not detected at or above elevated detection limits of 10 0
<br /> gg/L and 50 0 gg/L in the groundwater samples collected from MW-2 and MW-5, respectively
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<br /> Laboratory analytical results indicated that 1,2-DCA was detected in the groundwater sample collected
<br /> from MW-5 at a concentration of 72 gg/L The January 2005 monitoring event is the first time that
<br /> 1,2-DCA was detected in any of the monitor wells at the site
<br /> The average depth to groundwater in the monitor wells was 28 52 feet below the surveyed well collar
<br /> measuring points on January 13, 2005, 0 56 foot higher than measured during the previous quarter The
<br /> groundwater elevation contours indicated that the groundwater gradient was variable across the site, but
<br /> generally toward the north
<br /> Quarterly groundwater monitoring activities were conducted on April 12, 2005 The laboratory analytical
<br /> results for the groundwater samples collected from monitor wells MW-1, MW-3, MW-4, MW-6, and
<br /> MW-7 indicated that BTEX constituents were not at or above laboratory-reported detection limits in those
<br /> samples BTEX constituents were detected at moderate concentrations in the sample collected from MW-
<br /> 2, and at relatively elevated concentrations in the sample collected from MW-5 TPH-G was detected in
<br /> MW-2 and MW-5 at concentrations of 4 6 mg/1 and 45 mg/L,respectively
<br /> Laboratory analytical results indicated that MTBE was detected in the groundwater samples collected
<br /> from MW-1, MW-3, MW-4, MW-6, and MW-7 at concentrations of 1 0 gg/L, 2 1 gg/L, 12 gg/L, 5 1
<br /> • pg/L, and 1 5 Vg/L, respectively MTBE was not detected at or above elevated detection limits of 5 0
<br /> pg/L and 50 pg/L in the groundwater samples collected from MW-2 and MW-5,respectively
<br /> Laboratory analytical results indicated that 1,2-DCA was detected in the groundwater sample collected
<br /> from MW4 and MW-5 at concentrations of 0 7 gg/L and 140 pg/L The April 2005 monitoring event is
<br /> the second time that 1,2-DCA was detected in any of the monitor wells at the site
<br /> The average depth to groundwater in the monitor wells was 27 10 feet below the surveyed well collar
<br /> measuring points on April 12, 2005, 142 feet higher than measured during the previous quarter The
<br /> groundwater elevation contours indicated that the groundwater gradient was variable across the site, but
<br /> generally toward the north
<br /> Quarterly groundwater momtonng activities were conducted on July 15, 2005 The laboratory analytical
<br /> results for the groundwater samples collected from monitor wells MW-1, MW-3, MW-4, MW-6, and
<br /> MW-7 indicated that BTEX constituents were not at or above laboratory-reported detection limits in those
<br /> samples BTEX constituents were detected at moderate concentrations in the sample collected from MW-
<br /> 2, and at relatively elevated concentrations in the sample collected from MW-5 TPH-G was detected in
<br /> MW-2, MW-3, and MW-5 at concentrations of 6 8 mg/L, 0 370 mg/L, and 76 mg/L, respectively
<br /> Laboratory analytical results indicated that MTBE was detected in the groundwater samples collected
<br /> from MW-1, MW-3, MW-4, MW-6, and MW-7 at concentrations of 1 0 jig/L, 1 6 gg/L, 0 8 pg/L, 3 0
<br /> gg/L, and 1 1 µg/L, respectively MTBE was not detected at or above elevated detection limits of 5 0
<br /> gg/L and 100 }igfL in the groundwater samples collected from MW-2 and MW-5, respectively
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