ARCHIVED REPORTS_XR0003792 - Laserfiche WebLink

Home Browse Search

on samples to be selected later A leaching potential test would be run on the sample with the highest levels of TPHd& TPHg On September 5, 1997, Del-Tech Geotechnical Support Services developed MW-4, and purged and sampled MW-1 &MW-4 under the direction of a representative of the San Joaquin County EHD A copy of that report is included as EXHIBIT D. SUMMARY OF RESULTS OF WORK DONE TO DATE: • Both soil & water sample analyses from MW-2 & MW-3 have been below detection linuts since placement • TABLE I shows the results of laboratory analyses of soil samples from MW-1, LB-1, & MW-4 1 Benzene was not measured in soil samples from MW-1, MW-4, or LB-1 2 Toluene was only found in soil samples from MW-1 at 48 5', 58 5', and 68 5' It was below detection limits in both MW-4 & LB-1 . 3 Very low concentrations of ethylbenzene were measured at 15', 20', 25' & 30' in MW-4, at 3 i', 36', and 41' m LB-1, at 48 5', 56', and 58 5' in MW-1 4 Xylene was detected at very low levels inmost soil samples from 15' to 70' 5 TPH as gasoline was measured in soil samples from LB-1, but was below detection limits in both MW-1 & MW-4 6 TPH as diesel was recorded at varying concentrations in most soil samples • TABLE H summarizes the results of soil sample analyses from MW-4 Copies of the laboratory reports and custody chains are included as EXHIBIT E. • TABLE III summarizes the results of the water samples taken on 9/5/1997 from MW-1 & MW-4 Benzene was measured at 0 3 ug/L in MW-4, it was ND in MW-1 Toluene & ethylbenzene were ND in both wells Xylene was ND in MW-1, but measured 1 0 ug/L in MW-4 TPHg was ND in both wells TPHd was detected at 151 ug/L in MW-1 & 3030 ug/L in MW-4 It is interesting to note that benzene has never been measured in any of the soil samples, but has been present in very minor amounts in some water samples 5