ARCHIVED REPORTS XR0012937 - Laserfiche WebLink

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NOTIFICATIONS Undeigiound Service Alert (USA), the City of Stockton Fire Department and San Joaquin County Health were notified 48 hours in advance of any sampling, excavating and/or dulling at the site SAMPLE ANALYSIS The tluee UST's contained unleaded gasoline San Joaquin County Health and the State of California 1equlie that the soil samples be analyzed fol Total Petroleum Hydiocarbons as gasoline (TPHg) using EPA methods 8015 of 8260, for Benzene, Toluene, Ethylbenzene and Xylenes using EPA methods 8020 or 8260 and the fuel oxygenants (Ethanol, MTBE, TBA, DIPS, ETBE and TAME) using EPA methods 8260 PIPING REMOVAL DOCUMENTATION SAMPLING One sail sample was obtained from native sod beneath the removed product dispensing piping fol approximately every 20 linear feet of piping trench and from beneath each dispensei, see Table I and Figure 5 Each sample was collected in a 2-inch by 6-inch clean brass sleeve Immediately aftei obtaining the soil sample, it was field screened with a PID (photo-ionizing detector) containing a 10 2 ev bulb, for the presence of volatile olganrc compounds, gasoline ranges The sample sleeve was then sealed with teflon sheets and plastic end caps to prevent the loss of VOC s (volatile organic compounds) The brass sleeve was then labeled with site ID, sample ID, date and trine sannpled, name of sampler, and laboratory analysis needed Once labeled, the sample was placed into a ziplock baggy, sealed and placed into an ice chest containing ice to keep the sample cool until delivery to the analytical laboratory A Chani of Custody (CofQ was completed documenting the site ID, sample ID's, date and time sannples were obtained the laboratory analysis needed, and the name of the sampler Tine Co1C follows the samples and documents the who and when of possession transfer of the samples, from collection through final analysis, by California Certified Laboratory, North State Enviionrnental ELAP Certificate No 1753, see Appendix B SAMPLE RESULTS PIPING AND DISPENSER TRENCH 1 1 1_ 1R.. F110 .roc ta' ling f the ^rod— Table 011e COinLdllnS LiiC SVil sa1li�JlC lesulW i�Dti1 uit. uvl.utllCliluuvii SaiTipii.,� O. i.. dispensing system removal along with the docurnentation of contamination and contamination iennovai by over-excavation All analytes tested for were below laboratory lower detection limits except sample PL-4 which contained 0 006 mg/Kg Toluene, sample PL-6 which contained 0 006 nig/Kg Toluene, 0 011 mg/Kg Xylenes and 0 25 mg/Kg MTBE, and PL-8 which contained 0 007 ung/Kg Toluene 2 tt-603 over-ex 4-2000