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�-�� r.�� '� �.""�e , ^��. �� �m�»�t �� •�� ""' ",�'�" Vis, ys r��..�T� ��� '.. '. � ` ` <br /> 9 <br /> 4 <br /> FINDINGS <br /> To evaluate the soil and groundwater quality off site, one to two subsurface soil <br /> samples (five total) from each borehole and one groundwater sample (four total) from each <br /> monitoring well (PR-1, PR-2, BHD-1, and 1?HD-2) were selected for analysis. Samples were <br /> analyzed for total petroleum fuel hydrocarbons; benzene, ethylbenzene, toluene, and xylene <br /> (BETX);and total lead at Eureka laboratory. <br /> Soil Quality <br /> Results for soil samples analyzed are summarized in Table 1. Complete laboratory <br /> reports arr. included as Appendix D. Total petroleum fuel hydrocarbons and BETX <br /> constituents in each soil samples are below detection limits. Total lead concentrations in <br /> each soil sample are detectable at probably natural, background concentrations which are <br /> well below the California Regional Water Quality Control Board's, Central Valley Region <br /> %.regional Board's)designated level in a solid for the protection of groundwater quality. <br /> _. Table 1. Analytical!Results of January 199 Sail Samples <br /> ' Designated Detection <br /> Samglenumher BHD-1.1 131ID-1.2 BHD-2-2 PR-1-2 PR-2-2 Ievela limit <br /> Depth Interval,feet 55.6.0 105-11.0 10.5-11.0 10.5.11.0 10.5.11.0 - <br /> EPA 5020 <br /> Benzene,mg/tcg AID ND ND ND ND 0.7 0.7 <br /> Ethylbenmc.mg/kg ND ND ND ND ND 29 680 <br /> Toluene,mg/kg ND ND ND ND ND 100 100 <br /> Xylene,mg/kg ND ND ND ND ND 620 620 <br /> EPA 8015,modified <br /> Total petroleum fuel <br /> hydrocarbons.mglkg ND ND ND ND ND 10 NE <br /> Total lead.mg/kg 1.6 1.5 3.4 2.1 3-5 500 0.1 <br /> i aDesignatod level in s solid for the protection of groundwater quality.Regional Water Quality Control Board,central <br /> Vatley Region,revisal September 1987. <br /> Note Nn=nondectable;NE=no established suggested level for this constituent. <br /> Groundwater Quality <br /> On January 26, 1988, groundwater samples from monitoring wells BHD-1, BHD-2, <br /> PR-1, and PR-2 were collected by BC personnel and sent to Eureka laboratory for analyses. <br /> Results are summarized in Table 2. Complete laboratory reports are. included in <br /> ,r Appendix E. <br /> !v! <br /> WIN <br /> t2� <br /> _i. <br />