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TABLE 2-5 BENZENE ACCEPTABLE CLIMI)LATIVE SOIL 0ONTAMINATION LEVELS FOR PRotECT10H OF GROUND LATER ULIALIFIFD CALIFORNIA BASIN SITES Stop Do not use this table unless the site to question has been screened using the applicability checklist (Table 2 3) for general risk appraisal to protect ground water MEAN ANNUA4 INCHES PRECIPITATION 0 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12]14 14 1 16 1 18 1 20 1 22 1 24 1 26 1 28 1 30 1 32 1 34 1 36 1 38 1 to 5 to 6 to 7 to 8 to 9 to 10 to 11 to 12 to to 16 to 18to 20 to 22to 24 to 26 to 28 to 30 to 32 to 34 to 36 to 38 to 40 5 9 9 1 1 0 0 0 D 0 0 0 0 0 0 0 0 0 0 0 0 0 6 0 10 14 9 5 3 Z 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 19 9 10 10 6 3 1 0 0 a 4 0 0 0 01 0 01 0 Ol 0 0 Q 0 20 24 9 60 401 20 10 5 2 1 0 0 0 0 0 0 0 0 0 0 0 01 0 0 0 25 29 9 200 100 60 30 10 7 3 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 30 34 9 800 400 200 100 40 20 10 4 1 0 0 0 0 0 0 0 0 0 0 0 0 0 DISTANCE 35 39 9 1000 1000 700 300 100 60 20 10 3 1 0 0 0 0 0 0 0 0 0 0 0 0 40 44 9 1000 1000 1000 1000 400 100 80 30 9 2 0 0 0 0 0 0 0 0 0 0 0 0 70 45 49 9 1000 1009 1000 1000 1000 500 200 100 20 4 1 1 1 0 9 0 0 0 0 0 0 0 0 50 54 9 1000 1000 1000 10001 1000 10001 600 2001 50 91 2 21 1 1 0 0 0 0 0 0 01 0 HIGHEST 55 59 9 1000 1DO01 000 1000 1000 1000 1000 700 100 20 5 3 2 1 1 0 01 0 01 0 01 0 60 64 9 1000 1000 1000 1000 1000 1000 1000 1000 300 40 9 6 4 3 2 1 1 0 01 0 0 0 GROUND 65 69 9 1000 1000 1000 1000 1000 1000 1000 1000 700 80 10 10 8 5 3 2 1 1 0 0 0 0 70 74 9 1000 1000 1000 1000 1000 100D 1000 1000 1000 100 30 20 1D 9 6 4 2 1 1 0 0 0 WATER 75 79 9 1000 1000 1000 1000 1000 100D 1000 1000 1000 300 60 40 20 10 10 7 4 2 1 1 0 0 80 84 9 1000 1000 1000i 1000 10x0 1000 1000 1000 1000 700 100 70 40 30 10 10 7 4 2 1 1 0 FROM 85 89 9 1000 1000 1000 10001 1000 10001 1000 1000 1000 10001 200 100 8o 50 30 10 10 71 4 21 1 0 90 94 9 1000 1D00 1000 1000 1000 10001 1000 1000 1000 1000 400 200 1 F 90 50 30 101 10 6 3 2 1 SOIL 95 99 9 1000 10001 1000 1000 1000 1000 1000 1000 1000 1000 700 400 200 100 90 50 30 10 10 5 3 1 100 104 9 1000 1D00 1000 1000 1000 1000 1000 1000 1000 1000 1000 800 400 200 100 90 50 20 10 8 4 2 SAMPLE 105 109 9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 10001 800 4001 200 100 80 40 20 10 7 3 110 114 9 1000 1000 1000 1000 1DOO 1000 1000 10001 1000 1000 1000 1000 1000 800 400 200 100 70 30 10 10 5 IN 115 119 9 1000 1000 1000 1000 1000 1000 1000 10001 1000 1000 1000 1000 1000 1000 700 400 200 100 50 20 101 7 120 124 9 1000 1000 1000 10001 1000 TD00 1000 10001 1000 10001 1000 1000 1000 MOD 1000 6001 300 1001 90 40 201 10 FEET 125 129 9 1000 1000 1000 1000 1000 1DO01 1000 1000 1000 1000 1000 1000 1000 1000 1000 10001 500 200 100 60 301 10 130 134 9 1000 10001 1000 1000 1000 10001 1000 1000 1000 1000 1000 1000 1000 1000 1000 10001 900 400 200 100 40 20 135 139 9 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 700 300 100 60 30 140 144 9 1000 1000 1000 1000 1000 1000 10D0 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 500 200 100 40 145 149 9 1000 1000 1000 1000 1000 1000 1000 1000 iODO 1000 1000 1000 1000 1000 1000 1000 1DDa 1600 700 300 100 60 150+ 1000 1000 1000 1900 1000 1000 10-0 tODO 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 1000 500 200 90 Note Individual concentrations for any soil sample cannot exceed 100 ppm The numbers to this table do not represent soil concentrations, they reflect the accumulation of pollutant mass in contaminated soil These numbers can be derived from the LUFT manual worksheet (Table 2 4) _v,