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TreaTek remobilized to the site on October 29, 1991 and continued the sampling activities The borehole at location RGS1 was extended to a total depth of 6 3 feet bgs at which depth an obstruction was encountered which would not allow advancement of the auger A field screening soil sample was collected at that depth The next location sampled was SGN1 This borehole was advanced to a total depth of 15 feet bgs ' with field screening samples collected at depths of 5 feet, 10 feet and 15 feet bgs Only the 15 foot depth sample from this location was kept for laboratory analysis Location SGN2 was the next borehole completed This borehole was advanced to a total depth of ' 11 feet bgs where a below ground obstruction was encountered which restricted the advancement of the auger Field screening samples were collected at depths of 5 feet and 10 feet bgs The 10 foot bgs sample was kept for laboratory analysis Location PL2 was the final borehole completed on October 29 199 1 This le was advanced to a total depth of 10 feet bgs at which depth an obstruction was encountered owh ch would not allow advancement of the hand auger Field screening samples were collected at 5 feet and 10 feet bgs No analytical sample was collected from this borehole ' With the completion of the sample collection from borehole PL2, the boreholes RGN1 and RGN2 were reaugered to allow for grouting Premixed concrete was used to grout boreholes RGN1, RGN2, SGN1, PL2 and SGN2 All cuttings from the boreholes were containerized in 55 gallon drums onsite The sampling of the Pacific Car Wash site was completed p on November 4, 1991 The first location sampled was location SGS1 The borehole was advanced to a total depth of 15 feet bgs Field screening samples were collected at depths of 5 feet, 10 feet and 15 feet bgs The 15 feet bgs sample exhibited the highest OVA reading and therefore, was kept for laboratory analysis ' Location PL1 was sampled next This borehole was advanced to a total depth of 15 feet bgs with field screening samples being collected at depths of 3 feet, 5 feet, 10 feet and 15 feet bgs The 15 foot bgs sample exhibited the highest OVA reading and therefore was kept for laboratory ' analysis The final location sampled was Flt Again, this borehole was advanced to a total depth of 15 feet bgs with field screening samples collected at depths of 5 feet, 10 feet and 15 feet bgs The 15 foot ' bgs sample exhibited the highest OVA reading and therefore was kept for laboratory analysis Upon completion of the sampling activities, these boreholes were grouted closed to the surface with ' premixed concrete Following completion of each day's sampling period, the samples were stored in a refrigerated ' environment over night for delivery to the analytical laboratory the following morning Appropriate chain of custody documents accompanied each sample delivery The sample chain of custody recorrie aro 19`10 n.l •h ♦i YYlll1 Lit ara,yncai resuits in Appendix A r