Laserfiche WebLink
Fi <br /> H. FARR ASSOCIATES <br /> � Due <br /> to the elevated concentrations of VOCs detected in the deeper gas samples at SV-5 <br /> SV-6, soil samples were collected from these locations and a and <br /> analyzed - - <br /> . TPH-gasoline was detected at a concentration of 0-8 m Y-ed for BTEX and TPH. <br /> 30 foot sample at SVB-5. TPH-kerosene was detecte g/kg and total xylenes at 6 Mcg/kg in the <br /> d at a concentration <br /> 45 ft sample at SVB-6. No compounds were detected in the 45 ft same le from VB-5mg/kg in the <br />� P m SVB-5 or the <br /> 30 ft sample at SVB-6 (Figure 3, Table 2). <br /> + Water-Level Measurements <br /> Water-level measurements were recorded for Wells MW-1 through MW-5 on August 9, 1996 <br /> Measurements were made using an electric water-level p <br /> .�' robe graduated in_ 0.02-foot <br /> increments. The lowest point on the open well casing is marked and was surveyed as the <br /> reference point for the water-level measurements. Water level elevations were calculated <br /> based on the results of a level survey performed on October 31, 1994 (for wells MW-1 -2, -3 <br /> and -5) and on August 2, 1996 (for well MW-4) to determine reference elevations. The Ieve <br /> survey in August 1996 was conducted to establish an accurate top-of-casing reference elevatio <br /> for MW-4. The elevation of MW-4 was tied into wells MW-1 and MW-2 Table 3 n <br /> presents the potentiometric surface as measured on August 9, 1996 ( )' Fzgure 4 _ <br /> The most recent and selected historical groundwater measurements arere F <br /> p sented in Table 3. � <br /> The elevation of the potentiometric surface increased-an average of approximately 8.2 feet <br /> F <br /> from October 1993 through April 1995, and had remained fairly steady from April 1995 and <br /> October 1995, Between October 1995 and August,1996, the elevation of the potentiometric <br /> surface increased further, an average of approximately 5.8 feet. The direction of groundwater <br /> t d <br />{ flow is toward the northeast (approximately north 50° east) with a horizontal hydraulic <br /> gradient of approximately 0.002:foot/foot (Figure 4). <br /> R41820A-625960-7 <br /> uniDnieu/561Igu3.W pd 7 <br />