ARCHIVED REPORTS_XR0004910 - Laserfiche WebLink

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Fuller Mobile Home Park ' 36S F_ Louise Ava, Lathrop, California May 28, 1998 . Phase HSite Characterization - Continued Page. 4 r 3.2 Soil Sampling IAll soil equipment sampling was thoroughly steam-cleaned before and between sampling to prevent cross contamination Relatively undisturbed soil samples were taken at intervals of not more than 5 feet in order to evaluate the subsurface materials, however, this sampling interval may be waived in saturated sands in which sample recovery is not possible The soil samples were taken using a California Modified Split Spoon sampler with ' brass kners driven continuously by a wire line hammer The Geo Probe employed a spoon type sampler with acrylic sleeves and was driven by rotary hammer The laboratory samples did not have head space and were immediately sealed in their liners using aluminum foil-lined plastic caps The remaining samples were removed from their liners to be used as an aide to the on-site specialist in logging the material at that depth Soil samples collected for analysis were analyzed using EPA method 8015 modified for total petroleum hydrocarbons in the gasoline range, EPA method 3510/LUFT for diesel range petroleum hydrocarbons EPA method 8260 for oxygenates and EPA method 8020 for BTX&E compounds The minimum Idetection limits used for each analyte were 0 005 mg/kg for BTX&E, 2 5 mg/Kg for gasoline and 5 0 mg/kg for diesel Analyses were conducted by GeoAnalytical, Inc , of Modesto, California, and California Laboratory Services of Rancho Cordova, California, both State-certified laboratories Certificates of Analysis and Chain of Custody's are found in Appendix A of this report 3.3 Groundwater Sampling A single groundwater grab sample was collected from boring B-12 at the tune of completion This sample was collected to establish the presence of Benzene, Toluene, Ethyl-Benzene, Xylene or Oxygenates in the groundwater immediately east of the former UST Iocation Also collected during this event were water samples from MW-6 and MW-3 for dissolved oxygen and the irrigation well for all parameters A Tabular Summary of these results are found in Table 2 of this report (Appendix B)