Laserfiche WebLink
MICE <br /> EKE KLEINFELDER ' <br /> 1 EXECUTIVE SUMMARY <br /> Kleinfelder was requested by San Joaquin County to assess the soil for the presence of ' <br /> petroleum hydrocarbons at two underground storage tank sites at the San Joaquin General <br /> Hospital. One of the sites (tank Tl) was in use at the time of the request, but had failed a <br /> recent tank test; while the other site (tank T2) had not been used in many years and was <br /> scheduled for closure to allow for construction. ' <br /> This report presents the results of Kleinfelder's soil assessment in the vicinity of the two ' <br /> tank sites Because the tanks had been installed in the 1940's and accurate drawings of the <br /> tank locations were not available, and the prevalence of utility lines in the general vicinity ' <br /> of the tanks, a geophysical survey was conducted on September 19, 1991 to locate the two <br /> tanks The geophysical survey indicated the presence of a third tank(T3) adjacent to T2. <br /> 1 <br /> Based on the findings of the geophysical survey and limited access, one vertical boring was <br /> drilled at each end of Tl, one slant boring was drilled beneath tank T2 and one slant boring <br /> was drilled beneath tank T3. Five soil samples were submitted for quantitative analysis <br /> from the T1 site, and four soil samples were submitted from the T2/T3 site The samples ' <br /> were analyzed for total extractable petroleum hydrocarbons (TPH), purgeable TPH, <br /> benzene, toluene, ethylbenzene, and xylenes (BTEX), ethylene dibromide (EDB), and <br /> total lead <br /> Samples submitted from tank T1 did not contain extractable TPH, purgeable TPH, BTEX, , <br /> or EDB concentrations above the laboratory reporting limits Lead was detected above the <br /> reporting limit in three of the five samples submitted, however, the concentrations are ' <br /> below current regulatory requirements Kleinfelder recommends no further assessment of <br /> the soil in the vicinity of tank T1 , <br /> The two deepest samples submitted from the two borings at site T2/T3 were reported to ' <br /> contain extractable TPH, purgeable TPH, and lead A low concentration of xylenes was <br /> detected in one of the deep samples EDB was not reported in the two deep samples <br /> Lead concentrations were detected in the four samples at concentrations below current ' <br /> regulatory levels <br /> FR25-91-29 Page 1 of 11 <br /> Copyright 1991 Kleinfelder, Inc <br /> 1 <br />