Laserfiche WebLink
T <br /> June 1, 1488 <br /> UNOCAL Service Station No. 6981, StocAGS bNo. 038032- <br /> kton, Californa2, <br /> Each sample will be subjectively analyzed with a field <br /> photoionizing hydrocarbon vapor detector. These devices are <br /> useful for the semi-quantitative evaluation of the relative <br /> concentrations of volatile hydrocarbons. The photoionizing <br /> hydrocarbon v nor detector cannot be used to give absolute levels <br /> of contami:,ation. <br /> Samples collected for possible chemical analyses will be sealed <br /> with aluminum foil, plastic caps, and airtight tape. They will <br /> then be labeled and immediately placed in iced storage for <br /> transport to the analytical laboratory for testing. Chain of <br /> Custody Records will be initiated by the sampler in the field and <br /> will accompany the samples to the laboratory. Copies of these <br /> records will be presented in our Final Report. An example of a <br /> Chain of Custody Record is included in this report (Plate P-5) . <br /> The borings will be drilled to a depth approximately 20 feet <br /> below the uppermost zone of saturation or 5 feet into any <br /> saturated clay layer (aquitard) encountered. If a saturated <br /> aquitard is encountered, the boring will be terninated and <br /> backfilled with 5 feet of neat cement before installing ground- <br /> water monitoring wells. <br /> for <br /> 10 <br /> Applied Geos�'Vstena - <br />