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Site Background Canepa's Car Wash,Park Street Page 5 of 5 BTEX constituents were not detected at or above laboratory reported detection limits in those samples BTEX constituents were detected at low concentrations in the samples collected from MW-1 and MW-3, at moderate concentrations in the sample collected from MW-2, and at relatively elevated concentrations in the sample from MW-5 TPH-G was detected in MW-1, MW-2, MW-3, and MW-5, at concentrations of 0 11, 5 5, 0 2, and 48 mg/L, respectively Laboratory analytical results indicated that MTBE was detected at concentrations of 8 8 and 55 µg/L to the groundwater samples collected from MW-1 and MW-2, respectively MTBE was not detected at or above an elevated detection limit of 1,000 µg/L in the groundwater sample collected from MW-5 Because the result for the MW-2 sample was inconsistent with historical results and the detection limit for the MW-5 limit was elevated, the samples were reanalyzed for MTBE by EPA Method 8260B The results of the EPA Method 8260B analyses indicated that MTBE was not detected in the samples from MW-2 or MW-5 at or above the laboratory reported detection limits of 0 5 and 10 pg/L, respectively The laboratory analytical results of the groundwater samples collected on January 28, 2004 were generally consistent with historical monitoring results The groundwater table remained above the top of all well screens during the January 2004 monitoring event The average depth to groundwater in the monitor wells was approximately 27 88 feet below the surveyed well collar measuring points on January 28, 2004, 0 39 foot shallower than the previous quarter The groundwater elevation contours indicated that the groundwater gradient was generally toward the northeast, consistent with historical groundwater gradients P 12000_pg12038 Canepa Park12038 Canepa Park\Quarterly Momtonng Reports\2004 May\Site Background 05-2004 doc