ARCHIVED REPORTS_XR0012440 - Laserfiche WebLink

Home Browse Search

T C L E AIRWrAT E R �, R o t, r i \ (- £iriror„rortnr s . r: 4.0 RESULTS 4.1 Groundwater Gauging Groundwater at the MBP property was gauged at 50 40 feet below top of casing (-4 37 feet MSL) in monitoring well BMW-1 and 50 30 feet below top of casing (-4 53 feet MSL) in BMW-2 (Table 1) These water levels are approximately two feet higher than the water levels measured on December 14, 1995 Groundwater elevations are shown on Figure 3 The groundwater flow direction on the MBP site (based on two data points) appears to be generally toward the south, at a gradient of approximately 0 30% These results are similar to those obtained during previous monitoring events On December 14, 1995 Clearwater gauged and sampled groundwater in BMW-1 and BMW-2 in conjunction with Geocon, who simultaneously gauged and monitored the five monitoring wells associated with the FDIC site At that time, the groundwater gradient between the two sites was toward the southeast, as indicated in Clearwater's Quarterly Groundwater Monitoring Report, Fourth Quarter, 1995 (dated February 13, 1996) 4.2 Analytical Results of Groundwater Samples The results of groundwater analyses are included on Table 1 and Figure 4 TPHg, BTEX, and MTBE were detected in concentrations exceeding method detection limits in water samples collected from both MBP monitoring wells BMW-1 and BMW-2 In general, the highest concentrations of analytes were detected in the groundwater sample from BMW-1 Benzene was detected only in BMW-1 at a concentration of 20 ppb TPHg concentrations were 500 ppb and 200 ppb in samples from BMW-1 and BMW-2, respectively TPHd was not detected in either sample MTBE concentrations were O ppb and 319/ ppb in samples from BMW-1 and BMW-2, respectively C-115 1Q/96 3 April 12, 1996