ARCHIVED REPORTS XR0008122 - Laserfiche WebLink

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i i The initial pxlot test and the subsequent vapor extraction under interim variances removed 13 ,116 pounds of hydrocarbons from the soil and ground water beneath the site. Vapor recovery is occurring from three areas of past documented soil contamination- - the tank field excavation (EX) , the eastern product dispenser island (Pl ) and the western product dispenser island (P3-Swarm) . f I Also various ground water monitoring wells are utilized, specifically MW1 and MW5 with occasional use of MW3 , see Table 1 . I VAPOR RECOVERY RESULTS The vadose zone vapor recovery wells (PI , P3-Swarm and EX) f contributed little to the total recovered hydrocarbons during, the operation of the vapor recovery system under the variances , P1 = 1 . 3 pounds , P3-Swarm = 561 . 4 pounds and EX = 127 pounds , see Table 2. The ground water monitoring wells have produced the ma3ority of the hydrocarbons recovered at this site during the operation of the system prior to the authority to construct: MW1 - 2464 . 25 pounds , MW3 = 11 . 53 pounds, and MW5 = 8394 .91 pounds , As of July 29, 1992 , the total system has recovered a calculated total of 13970 .09 pounds of hydrocarbons , 854 .09 of which have been produced since the beginning of operations under the Authority to Construct. As of July 21 , 1992 , the date it was destroyed, P1 had produced 2.96 pounds of hydrocarbons or an additional 1 .63 pounds since the beginning of operation under the Authority to Construct. see Table 1. i I VSB5 was added to Vapor extraction well P3-Swarm on 7/27/92 . The swarm in combination with VSB5 has produced 596 . 24 pounds of hydrocarbons, an additional 34 . 84 pounds since operation under the E Authority to Construct, these wells are currently producing X0 . 04 pounds per day, see Table 1 . Vapor extraction well EX has produced 131 . 31 pounds of hydrocarbons, an additional 4 . 18 pounds since operation under the Authority to Construct, this well was shut down on 7/24/92 see Table 1 . As of July 24 , 1992 , MW1 had produced a total of 2534 pounds , of j which 69 . 75 pounds have been produced during operations under the Authority to Construct. MW1 was shut down on 7/24/92. i As of July 24 , 19921 MW5 has produced a total of 9029 . 22 pounds , of which 634 . 31 pounds have been produced during operations under I the Authority to Construct . MW5 was transferred to use as a clean air in)ection well on f 7/24/92 . R604 vapor, 7/31/92 , p. 8