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_ - w Industrial 11'el I M-A shown on the sarnpl ing plan map relers to one of thrvc old water supply wells iris laIIed and used prior to City .Vater avaiIabifity. They were still open as of July 17, 1989, when the sampling plan was approved by the IHS . Abandonment of these wells are covered later herein. All operations and sampling for testing included as Appendices A-15, A-16 , A17, A- 18, and A-21 were witnessed by representatives of the DHS. Di;S was informed of operations reported on in Appen- dix A-20, but declined to witness them. These operations inr. Iude all phases of sample collection, preservation and documentation. Tables 13-1 , E-2 and C following are tabulations of the sampling and testing of m,iterials from the excavated pit area. DISCU.,.iIQN OF TLST RESULTS The sampling and testing, as noted earlier , was not witnessed by the writer ; however , with one exception, was witnessed by DHS, and the soil sampling plan had been approved by DHS. Groundwater Groundwater had seeped into the pit and filled it to about -35' g. l . This was during the summer dry season and rainfall was not a factor. Mostof the seepage water was pumped out in the . third week of July, 1989, immediately prior to sampling. The.v.ater was disposed of ' into the old Winerysettlingponds on the north and west sides ' of t roperty. Approval for the `disposal was recieved from th ❑ , w-i-th .consultation with the CVRAQCB After pumping, there was still a shallow-pool -at the deepest part of the excavation, but the sides and most of the bottom-were dry enough for sampling. The first samples were collected on July 20, 1989, ju:,t three\ days after the July 17, 1989 date stamped on the sampling program plat (Appendix A--14) . CES collected all samples , bOTh water and soil , using standard EPA approved methods , chain-of-custody documentation, sealed, capped and labled the 2" X 6" brass collection sleeves and placed them on ice for iransportion to the laboratory. CES follows their own internal quality assurance and control program, which includes trip blanks and spiked tests in ' ',e laboratory on about 20% of their daily samples . The remaining pond cater at the deepest part of the excavation varied from zero depth to about 3 feet. Water was collected from the pond and soil samples from__the pit bottom and side walls. Water samples were analyzed for BT`X and TEH using current EPA methods 602 and GCFID 3510, as specified by the DHS. No hydrocar- bons above the detection limit were found (Table C) . . 8