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�4 9 �r �4 chemical analysis was labeled and placed in a cooler containing ice' pending delivery to a California state-certified laboratory. Soils were analyzed for TPH as gasoline(TPHg),TPH as;diesel(TPHd),TPH as motor oil (TPHmo), and BTEX using EPA Method 8015-M/8020 and 5520. All samples retained by this procedure were recorded on Chain-of-Custody Records,which accompanied the samples to the laboratory and are included as Appendix B l To father define the types of hydrocarbons encountered on the site,!the soil samples collected in February were ' submitted to Zymax Envirotechnology,Inc.(Zymax)for analysis for;benzene,toluene,ethylbenzene and xylenes (BTEX), TPH C4-C40, and naphthalene using a combination of GC/MS for EPA Method 8260 and 8270 protocol.AH samples retained by this procedure were recorded on Chain-0f-Custody Records,which accompanied the samples to the laboratory and are included as Appendix C. ii The boreholes were abandoned by back-filling the borehole to the surface with cement grout, and resurfacing with asphalt. l 2.2.2 Groundwater Grab Sampling and Analysis {I ' SECOR collected groundwater grab samples from the soil boring locations. Groundwater grab samples were collected by advancing the borehole 2 feet into the saturated soil. A�2-inch diameter section of slotted FVC pipe was installed to the bottom of the borehole within the casing. Groundwater was allowed to stabilize within the PVC pipe and groundwater samples were then collected by lowering a clean stainless steel bailer into the temporary PVC pipe.Groundwater samples were transferred directly from the bailer into three 40-m1 VOA vials and an amber one-liter jar. Care was taken when transferring the water from the bailer to the containers to avoid ' turbulence as much as possible. The containers were filled and capped so that no air bubbles were trapped. Sample containers were labeled and inunediately placed in a cooler containing ice for delivery to the analytical laboratory. Following sample collection,the slotted PVC casing was removed from the borehole,steam-cleaned and properly , disposed. Groundwater samples collected during the January sampling were submitted to Superior Analytical accompanied by a completed chain-of-custody form. Groundwater grab samples were analyzed for TPHg,TPHd,TPHmo,and BTEX using EPA Method 8015-M/8020 and 5520. All samples;retained by this procedure were recorded on Chain-of-Custody Records,which accompanied the samples to the laboratory and are included as Appendix D. To further define the types of hydrocarbons encountered on the site, the groundwater samples collected in ' February were submitted to Zymax for analysis for benzene,toluene,ethylbenzene and xylenes (BTEX),TPH C4-C40,and naphthalene using a combination of GUMS for EPA Method 8260 and 8270 protocol. All samples retained by this procedure were recorded on Chain-of-Custody Records,which accompanied the samples to the ' laboratory and are included as Appendix E. tl . C _k h:5wmirecllcit�lYilJtii.r�t r !j 10,11-001-02 5 3 r e[ J ,q I