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TABLE 3 HISTORICAL ANALYTICAL RESULTS - GROUNDWATER PETROLEUM HYDROCARBONS Cal-Farm Supply Company (All data in ttg/L) EPA 8015M EPA 8020 or 602M Sample Date Ethly- n-Butyl iso-Propyl Location Sampled TPH-Gas TPH-Diesel Benzene Toluene Benzene Xylenes benzene Benzene MW-1 4/12/89 1,200 7,300 150 38 58 176 NA NA Duplicate (MW-1) 4/12/89 480 6,500 130 21 37 37 NA NA 6/5/90 2,100 9,700 92 ND<5 ND<5 26 NA NA 5112/93 6,000 17,000 ND<1.0 ND<1.0 ND<1.0 ND<1.0 NA NA • 8/30/93 6,300 31,000 NA NA NA NA NA NA 12/9/93 1,600 ND<5,000 NA NA NA NA NA NA 3/8/94 3,200 5,100 NA NA NA NA NA NA 11/1/94 66,00017,000 1,200 4,800 1,000 5,900 NA NA 4/19-20/95 2,800 1,600 134 20.6 6 13.1 228 50.8 MW-2 4/12/89 ND<50 ND<50 ND<1.0 ND<1.0 ND<1.0 ND<1.0 NA NA 6/5/90 ND<50 ND<50 ND<1.0 ND<1.0 ND<1.0 ND<1.0 NA NA 1111/94 NA NA NA NA NA NA NA NA 4/19-20/95 ND ND ND ND ND ND ND ND MW-3 4/12/89 ND<50 ND<50 ND<1.0 ND<1.0 ND<1.0 ND<1.0 NA NA 6/5/90 ND<50 ND<50 ND<1.0 ND<1.0 ND<1.0 ND<1.0 NA NA 11/1/94 NA NA NA NA NA NA NA NA 4/19-20/95 ND ND ND ND ND ND ND ND MW-4 4/12/89 ND<50 ND<50 ND<1.0 ND<1.0 ND<1.0 ND<1.0 NA NA 6/5/90 ND<50 ND<50 ND<1.0 ND<1.0 ND<1.0 ND<1.0 NA NA 11/1/94 NA NANA NA NA NA NA NA • 4/19-20/95 ND ND ND ND ND ND ND ND MW-5 6/5/90 ND<50 ND<50 ND<1.0 ND<1.0 ND<1.0 ND<1.0 NA NA 8/30/93 ND<50 ND<50 NA NA NA NA NA NA 11/1/94 NA NANA NA NA NA NA NA 4/19-20/95 ND ND ND ND ND ND ND ND ND<50 ND<50 < < < ND<1.0 NA Notes: NA=Not Analyzed ND=Not Detected at reporting limit given. Sources: Preliminary Site Investigation Report dated June 1989,prepared by Kennedy/Jenks/Chilton(K/J/C). Phase II Site Investigation and Site Closure Report dated June,1991,prepared by K/J/C. Letter from Wendy Wyels of the CRWQCB,Ag Regulatory Unit to Catherine Withworth,dated May 11,1995. Groundwater Sampling Results-Fourth Quarter 1994 letter report dated December 19,1994,prepared by K/J/C.