ARCHIVED REPORTS XR0003300 - Laserfiche WebLink

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! • 4 The soil samples frorn below the fonner 10,000-gallon wastewater tank (ST-3A, B) and from Stockpile 3 were analyzed foi total extractable petroleum hydrocarbons by EPA Method 801.5, BTEX by EPA Method 8020, chlorinated hydrocarbons by EPA Method 8010, cadmiurn, claonlrtim, lead and zinc, and for PCBs by EPA Method 8270 The stockpile was reported to contain total extractable petroleum hydrocarbons of 22 mg/kg, and PCBs of 0 095 mg/kg The soil saniple,, tion below the forwiei tank were reported below detection limits for total extractable petroleum hydrocarbons and PCBS at detection limits of 0 0024 and 006 rng/kg, respectively Discoloration of the soils, however, was noted on the north wall of the tank cavity following removal of the tank 5 The soil samples fiom below the former 26,000-gallon diesel tank (ST-2A, B, C), from Stockpile 2, and from the remote fill pipe (RF) were analyzed for total extractable petroleuin hydrocarbons by .EPA Method 8015 and BTEX by EPA Method 8020 The soil samples frorn below the tormer tank were reported to contain total extractable petroleum hydrocarbon,, taiigriig frorn 3,900 to 5,100 mg/kg and xylenes ranging from 0 O6 to 0 072 mg/kg The soil fiom the stockpile was reported to contain total exttactable petroleum hydrocarbons of • 640 mg/kg The soil sample fiorn below the rewrote fill pipe was repo:ted to contain total extractable petroleum hydiocaibons of 3,500 rng/kg and xylenes of 0 034 mg/kg 6 A soil sample was collected within the 26,000-gallon tank cavity fi oar appy oximiztely 6 feet below former tank bottom (ST-2D) The soil sample was repotted to contain total extractable petroleum hydrocarbons below detection limits of 12 mg/kg 1 2 ADDITIONAL SOIL REMOVAL, I The initial soil samples collected from approximately 2 feet below the former 26,000-gallon diesel tank were of fill material containing elevated levels of petroleum hydrocarbons The subsequent soil sample, approximately 6 feet below the former tank revealed a fine-grained native material containing no detected petroleum hydrocarbons The rernarmng fill material containing elevated levels of petroleurn hydrocarbons was removed from the bottorn of the tank cavity An additional 6 to 8 feet of fall material was removed from below the former tank bottom Discolored ;oil is present at the eastern end of the tank cavity to approximately 4 to 5 feet below original giound surface . 2 Seven soil samples were then collected from the tank cavity Three soil samples were collected from the bottom of the tank cavity (ST-2E, F, H) and 2 soil samples were collected ENVIRONMENTAL SOLUTIONS