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GRANITE CONSTRUCTION 20383S7638 06/24/02 01:03pm P. 003 <br /> kn_.----.___---•-- ----•-------•-----•-------— ------- - K L E I N f E l D E R <br /> TABLE 1 <br /> Concentrations of CAM 17 Metals in Soil <br /> Granite Construction Stockpile <br /> Subdivision 7253,7358,and 7467 <br /> Oakley,California <br /> Sample Identification[Sample Datel Industrial <br /> Metal 24090/24091 A&B 24092/24093 A&B PRGs X <br /> Analytes/Parameters [7/26/01] [7/26/01] For Soil TTLC Limits STLC Limits <br /> (11/1/00) <br /> Antimony ND(<50) ND(<10) 82001 500 150 <br /> Arsenic ND(<50) 12 440 2.7 2 500 50 <br /> Barium 380 230 120,000 10,000 1,000 <br /> Beryllium ND(<5.0) ND(<1.0) 3,700 2,200 75 7.5 <br /> Cadmium ND(<5.0) ND(<1.0) 81011 3,0000— 100 10 <br /> Chromium 31 21 450(2) 2,500 50 <br /> Cobalt ND(<20) 8.8 12010001 8,000 800 <br /> Copper 590 33 76,000(11 2,500 250 <br /> Lead 590 100 750 1,000 50 <br /> Mercury 0.11 0.057 610(1) 20 2 <br /> Molybdenum ND(<20) ND(<4) 10,0001 3,500 3,500 <br /> Nickel 44 32 41,0001 2,000 200 <br /> Selenium ND(<50) ND(<10) 10,0001 100 10 <br /> Silver ND(<5.0) ND(<].0) 10,0001 500 50 <br /> Thallium ND(<50) ND(<10) 1301 700 70 <br /> Vanadium 22 25 14,0001 2,400 240 <br /> Zinc 740 160 610,000(1) 5,000 2,500 . <br /> Units mg/kg mg/f <br /> Notes: <br /> ND —none detected at or above the detection limits shown for the individual analytes <br /> mglkg =milligrams per kilogram(parts per million) <br /> mg1l —milligrams per liter(parts per million) <br /> TTLC =total threshold limit concentration <br /> STLC —soluble threshold limit concentration <br /> DRGs =preliminary remediation goals <br /> Ill =non carcinogenic hazard <br /> t2) =cancer risk 1 E+06 <br /> 20-1108-33.001/2001E097 Page T-1 <br /> Copyright 2001,Kleinfetder,Inc. October 16,2001 <br />