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TABLE 2-SUMMARY OF DETECTED METALS IN SOIL Metalsa Structural Products,Inc.-1550 Industrial Drive,Stockton,California Sample Sampling Depth Arsenic Barium Beryllium Cadmium Chromium Cobalt Copper Lead Mercury ID Date (feet) (mg/kg) m /k ) (mg/kg) (mg/kg) (mg/kg) (m /kg) (mg/kg) (mg/kg) (mg/kg) GP-3 7/12/10 5-6 6.6 NA 0.72 <0.13 53.9 NA 29.3 7.0 0.0191 GP-4 7/12/10 7-8 5.7 NA 0.57 <0.13 36.2 NA 25.8 6.6 <0.011 GP-5 7/13/10 6-7 8.8 NA 0.49 <0.13 33.1 NA 22.0 5.5 0.014) GP-6 7/12/10 6-7 10.1 NA 0.67 <0.13 51.4 NA 30.0 7.6 0.017J GP-8 7/13/10 7-8 6.4 NA 0.63 0.14J 44.4 NA 28 6.5 0.01lJ CHHSL 0.24 63,000 1,700 7.5 37* 3,200 38,000 3,500 180 RSL-Direct Contact 0.67 220,000 2,300 980 6.3* 350 47,000 800 40 RSL-GW Protection 0.0015 160 19 0.69 0.00067 0.27 28 - 0.033 Cal-Mod RSL-Direct Contact 0.25 - 7,000 3,970 - 320 - - - Sample Sampling Depth Nickel Silver Vanadium Zinc ID Date feet (mg/kg) (mg/kg) (mg/kg) GP-3 7/12/10 5-6 26.8 0.42J NA 65.1 GP-4 7/12/10 7-8 25.8 0.30J NA 58.9 GP-5 7/13/10 6-7 23.4 0.31J NA 48.8 GP-6 7/12/10 6-7 34.7 0.48J NA 66.4 GP-8 7/13/10 7-8 30.2 0.47J NA 61.7 CHHSL 16,000 4,800 6,700 100,000 RSL-Direct Contact 22,000 5,800 5,800 350,000 RSL-GW Protection 26 0.80 86 370 Cal-Mod RSL-Direct Contact - - - - Notes: Values in bold exceed a screening level J estimated concentration below the reporting limit mg/kg milligrams per kilogram CHHSL California Human Health Screening Level,Commercial/Industrial Land Use(Cal/EPA,January 2005) RSL Regional Screening Level,Industrial Soil(EPA,May 2014) Cal-Mod RSL California-Modified Regional Screening Level,Industrial Soil(DTSC,May 2013) * Standard for Chromium VI 1163-3 2014 0617 PGAWI' 3 GRI