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FARR ASSOCIATES control and to maintain moist soil conditions favorable to bioremediation Fertilizer was also added to enhance microbial growth On August 15, 1990, fifteen samples were fi eld-compo sited and analyzed for TPH-d and BTEX The results of these analyses did not detect the presence of benzene, but did detect relatively low levels of ethylbenzene, xylenes and toluene TPH-g and TPH-d were detected in the range of 14 7 to 3,322 mg/kg and 46 to 718 mg/kg, respectively These analytical results are summarized in Table F-1, Appendix F [WHF,November 1990] The approximate dimensions of the stockpiled soils inspected by lCF Kaiser at 1320 West Weber ' on April 4, 1995 were 125 by 260 feet, with depths ranging from 1 to 3 feet The soil had been placed on visquene The estimated volume of the stockpiled soils was approximately 2,400 cubic yards On August 3, 1995, twenty soil samples were collected in 40-foot intervals from a grid constructed on the stockpiled soils The confirmation soil samples were collected by hand- auguring a pilot hole approximately 18 to 24 inches below the ground surface No BTEX were detected in any of the twenty samples (ICF Kaiser, October 4, 1995) TPH-g was only detected in one sample, at a concentration of 0 4 mg/kg TPH-d was detected in 18 of 20 samples at concentrations ranging from 10 to 5,500 mg/kg TPH-o was detected in all soil samples at concentrations ranging from 70 to 11,000 mg/kg The analytical results of the soil samples are summarized in Table F-2, in Appendix F The PHS/EHD established a cleanup goal of 100mg/kg for TPH-d and 1000 mg/kg for TPH-o (PHS/EHD, December 29, 1995) Based on this goal, ICF Kaiser proposed to dispose of the soil in the vicinity of sample CS-13 to a Class II landfill, but a State Tank Fund representative asked for alternatives to be considered With agreement by PHS/EHD staff, ICF Kaiser collected four soil samples on April 26, 1996 from four locations within 10 feet of sample point CS-13 (ICF Kaiser, May 24, 1996) Each sample was composited from soils collected throughout a 2 5 foot sampling interval Observations during sampling did not indicate any odor or staining Analysis of the soil samples detected TPH-o concentrations ranging from 210 to 610 mg/kg TPH-d was not detected in any of the samples These analytical results are summarized in Table F-3, in Appendix F Based on the analytical results from the April 26, 1996 sampling described above, ICF Kaiser recommended that the soil stockpile issue be closed by PHS/EHD (ICF Kaiser, May 24, 1996) Mary Meays of PHS/EHD agreed that no further action was required related to the stockpile of treated soil at 1320 West Weber Street, and PHS/EHD issued a no further action letter for the West Weber Street Site on April 1, 1997 45 Drummed Waste Disposal All drummed waste soil from drill cuttings and purge water from quarterly monitoring events was removed from the Site and properly disposed (All data pertaining to drummed waste removal is contained in Appendix G) From August 21 through August 25, 1998, Doulos Environmental Company disposed of approximately 6 5 tons of soil, and 43 drums from the Site Also, approximately 300 gallons of water were transferred from the drums to a storage tank On September 8, 1998, groundwater collected during quarterly monitoring was added to the storage tank Prior to disposal, samples were collected from the soil and water and analyzed for BTEX, methyl-butyl ether, TPH-g and TPH-d c 1M riles\Annelw wwl ro ecislumon\ClosureR t w d 8