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TABLE 1 HISTORICAL ANALYTICAL RESULTS - SUBSURFACE SOIL Cal-Farm Supply Company (All data in ppm) Sample Date Sample Sample Depth Ethly- Location Sampled ID (Feet bgs) Nitrate TPH-Gas TPH-Diesel TPH-Naptha Benzene Toluene Benzene Xylenes B-1 4/5/89 1 1.5 -2.0 NA ND<1.0 ND<1.0 NA ND<0.001 0.004 ND<0.001 ND<0.001 2 5.0 -5.5 3.6 ND<1.0 ND<1.0 NA 0.001 0.007 ND<0.001 ND<0.001 3 10.0 - 10.5 3.4 ND<1.0 ND<1.0 NA ND<0.001 0.004 ND<0.001 ND<0.001 5 20.0 -20.5 NA 68 ND<1.0 NA 0.044 0.032 0.064 0.11 B-2 4/6/89 1 0.5 - 1.0 NA ND<1.0 ND<1.0 NA ND<0.001 0.017 ND<0.001 ND<0.001 • 2 5.0 - 5.5 3.6 ND<1.0 ND<1.0 NA ND<0.001 0.002 ND<0.001 ND<0.001 3 10.0 - 10.5 53 ND<1.0 ND<1.0 NA ND<0.001 0.002 ND<0.001 ND<0.001 4 15.0 - 15.5 NA ND<1.0 ND<1.0 NA ND<0.001 0.006 ND<0.001 ND<0.001 MW-1 4/5/89 1 0.5 - 1.0 13 NA NA NA NA NA NA NA 2 5.5-6.0 NA ND<1.0 ND<1.0 NA ND<0.001 0.006 ND<0.001 ND<0.001 4 15.5- 16.0 3.0 ND<1.0 10 NA 1 0.004 1 0.003 INI <0.001 ND<0.001 MW-2 4/6/89 2 5.5 -6.0 58 NA NA NA NA NA NA NA 3 10.5 - 11.0 14 ND<1.0 ND<1.0 NA ND<0.001 0.005 ND<0.001 ND<0.001 4 15.5 - 16.0 NA ND<1.0 ND<1.0 NA ND<0.001 0.005 1 ND<0.001 ND<0.001 5 20.5 - 21.0 NA ND<1.0 ND<1.0 NA ND<0.001 ND<0.001 ND<0.001 ND<0.001 MW-3 4/6/89 2 5.5 -6.0 12 NA NA NA NA I NA I NA NA 3 105 - 11.0 15 ND<1.0 I ND<1.0 I NA ND<0.0011 0.005 ND<0.001 ND<0.001 4 15.0 - 15.5 NA ND<1.0 ND<1.0 I NA I ND<0.001 I ND<0.001 I ND<0.001 I ND<0.001 MW-4 4/7/89 2 5.5 -6.0 27 NA NA I NA NA NA I NA I NA 3 10.5 - 11.0 12 ND<1.0 ND<1.0 I NA I ND<0.001 0.014 ND<0.001 ND<0.001 • 4 15.5- 16.0 NA ND<1.0 ND<1.0 I NA I ND<0.001 0.013 ND<0.001 I ND<0.001 [M71/90 1 3 15.5- 16.0 NA ND<0.05 ND<1.0 ND<0.05 ND ND ND I ND 4 20.5 -21.0 NA ND<0.05 ND<1.0 0.11 ND ND ND I ND F___5__T_25,5 -26.0 NA ND<0.05 ND<1.0 I ND<0.05 I ND ND ND I ND Notes: Source: Preliminary Site Investigation Report dated June 1989 and Phase II Site Investigation Report dated June 1991. Both documents prepared by Kennedy/Jenks/Chilton. bgs=below ground surface Samples from B-1, B-2, and MW-1 through MW-4 were analyzed for Chlorobenzene, 1,4-dichlorobenzene, 1,3-dichlorobenzene, and 1,2-dichlorobenzene and there were no detections. NA=Not Analyzed Total Petroleum Hydrocarbons(TPH)analyzed by Modified EPA Method 8015. BTEX constituents analyzed by EPA Method 8020. Nitrates analyzed by EPA Method 352.1.