Laserfiche WebLink
i <br /> r p <br /> 4 <br /> i concertation occurring in-U-C. Hydrocarbon concentrations generally <br /> attenuate to none-detected at depthsgr eater than 15 feet. <br /> j o PACIFIC has couducted three groundwater sampling events since the <br /> installation of Monitoring Wells U-1 thi ougb.U-3..Groundwater <br /> r� elevations at the site have risen approximately 1-1/2 feet since the first <br /> LIP sampling event in November 1990. Static groundwater occurred at <br /> depths of approximately 8 feet to 9 feet below grade during the <br /> May 23, 1991,sampling event,with a northerly flow direction ata <br /> gradient of 0.006. <br /> °•t'' +7 Y1a <br /> o Certified laboratory analysis of groundwater samples collected on <br /> �-� May 23, 1991,indicates maximum concentrations of 3,200 parts per <br /> € billion(ppb)TPH-gasoline in Well U-5,280 ppb TPH-diesel.in U-6, •3'"' <br /> and 55 ppb benzene in U-1. <br /> o To further define the extent of petroleum hydrocarbons in the soil and <br /> i" groundwater underlying the site,PACIFIC recommends tha <br /> e J instaliatioa of two additional groundwater monitoring wells located v' <br /> off-site. ", <br /> I L♦ .t <br /> 60 <br /> x <br /> r raP t <br /> I 6 . <br /> 1 r <br /> 3100101/REPOR•-_ . September 30, 1901 <br /> 1 <br />