ARCHIVED REPORTS HUMAN HEALTH SCREENING EVALUATION ADDENDUM

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ii i TABLE 3 SUMMARY OF SOIL ANALYTICAL RESULTS: METALS SURLAND HOMES-BRIDLE CREEK Tracy,San Joaquin County, California Concentrations reported in mg/kg Depth Date Hexavalent Boring ID (feet bgs) Collected Antimony Arsenic Barium Beryllium Cadmium Chromium Cobalt Copper Chromium Lead Mercury Molybdenun Nickel Selenium Silver Thallium Vanadium Zinc B-1 1 10/02/07 <0.89 4.1 205 0.61 <0.61 34.6 10.0 43.5 <2.0 11.5 <0,011 1.0 33.6 <0.96 <0,17 <0.93 699 72.4 B-1 12 10/02/07 <0.89 5.0 211 0.85 <0.85 45.7 12.3 185 <05 9.6 <0.010 0.68 40.8 <0.97 <0.17 <094 77.9 143 B-2 1 10/02/07 <0.89 5.6 208 0.64 <0.64 37.4 11.4 25.0 <2.0 40.0 0.015 0.82 36.2 <0.97 <0.17 <0.94 68.7 79.8 B-2 12 10/02/07 <0.89 4.8 223 0.94 <0.94 47.4 12.8 122 <0.5 10.5 <0.010 0.60 41.9 <0.96 <0.17 <0.93 81.6 113 B-3 1 10/02/07 <0.89 4.2 210 0.65 <0.65 36.5 10.4 21.5 <2.0 11.5 <0.010 0.62 31.9 <097 <0.17 <0.94 68.1 54.3 B-3 12 10/02/07 <0.88 4.6 193 0.74 <0.74 43.7 10.2 30.1 <0.5 9.6 0.019 0.53 39.7 <0.95 <0.17 <0.92 69.0 589 B-4 1 10/02/07 <0.89 3.7 176 0.64 <0.64 34.7 10.6 39.0 <0.5 8.1 <0.011 0.55 30.5 <0.97 <0.17 <0.94 71.7 56.0 B-4 9.5 10/02/07 <0.89 5.2 214 0.89 <0.89 46.7 12.1 30.2 <0.5 10.0 <0.011 0.67 40.6 <0.95 <0.17 <093 77.5 64.3 B-5 1 10/02/07 <0.89 4.6 195 0.69 <0.69 36.4 11.6 34.1 <0.5 9.2 <0.010 0.63 34.8 <0.97 <0.11 <0.94 74.5 54.9 B-5 9.5 10/02/07 <0.89 4.8 230 0.93 1 <0.93 47.8 13.5 34.6 <0.5 10.2 <0.010 0.50 43.1 <0.97 <0.17 <0.94 80.5 70.0 B-6 1 10/02/07 <0.88 3.6 188 0.64 <0.64 36.7 10.8 24.0 <0.5 10.8 0.012 0.53 31.4 <095 <0.17 <0.92 74.0 50.6 B-6 10 10/02/07 <0.90 5.3 219 0.93 <0.93 47.1 13.0 30.6 <0.5 10.0 <0.011 0.63 41.3 <0.98 <0.17 <0.95 80.3 66.9 B-7 1 10/02/07 <0.87 4.2 159 0.57 <0.57 33.3 9.1 39.1 <0.5 8.7 <0.011 0.60 28.4 <0.94 <0.16 <0.91 71.1 56.6 B-7 10 10/02/07 <0.89 5.8 204 0.83 <0.83 1 45.6 12.1 29.0 <0.5 99 <0.011 0.72 40.9 <0.97 <0.17 <094 74.3 63.6 Number of Samples: 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 14 No. of Detections: 0 14 14 14 0 14 14 14 0 14 3 14 14 0 0 0 14 14 Max.Detect(Mg/kg): --- 5.8 230 0.94 0 48 14 185 --- 40 0.019 Lo 43 -- --- --- 82 143 -- -- -- Max. Nondetect(mg/kg); <0,90 -- -- -- <0.94 -- -- -- <2.0 <0.010 7 098 <0.17 <0.95 -- -- Abbreviations: bgs=Below ground surface EPA=United States Environmental Protection Agency ID m Identification mg/kg=Milligrams per kilogram Notes: 1. Samples were analyzed by Lancaster Laboratories,Inc.for mercury using EPA method 7471A,and for all other metals using EPA Method 6010B. Page I of I SAIC