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SEEN, r MENEM y.8 10 w. Table 2. Analytical Results of January 26, 1988,Groundwater Samples f" Designated Decoction Limit i Sample number BHD-t BHD-2 PR•l PR-2 levels is EPA 602 Benzene,ugp 3,700 ND ND ND b 0.5 Ethylbcnzene,ug/I 1,700 ND ND ND i Z� 0-5 Toluene,ug/1 270 NO ND ND 10,000 0.5 «:a Xylcnc,ug/1 2,100 NO ND ND ( 62.000 1 OS EPA B015,modified r Total petroleum fuel hydrocarbons,mg/1 21 ND NO NO NE 1.0 Total lead,mgp ND ND ND' NO 5 0.1 - iw aDesignated level in a Liquid for the protection of groundwater quaL:j,Regional Board, Central Valley Region,revised September 1987. w bCalifomia Department of Health services DrinUng Watt Action Level,January 1987. Note ND=nondectable;NE=no established suggested levet for this constituent. - Constituents in groundwater samples from wells BHD-2, PR-1, and PR-2 are below detection limits. In the groundwater sample from well BHD-1, the benzene concentration exceeds the California Department.of Health Services (DHS) Drinking Water Action Levels, established in January 1987. Also, in this sample, the ethylbenzene, toluene, and xylene concentrations are below the Regional Board's designated levels in water for the protection of groundwater quality. The total petroleum fuel hydrocarbon concentration in this sample is 21 milligrams per liter (mg/1). No designated level has yet been established for total petroleum fuel hydrocarbons. The total lead concentrations in all the groundwater samples are below detection limits. On May 2, 1988, the first round of quarterly groundwater samples from monitoring wells PR-1, PR-2, BHD-1, E-5, E-8, and E-9 was collected by BC personnel and sent to the Eureka laboratory for analyses. Results are summarized in Table 3. The complete Iaboratory reports are included in Appendix P. i ice.