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cbCurtis&Tompkins.Ltd. <br /> �B.YL t _ tart <br /> C. California Title 22 Metals <br /> ab it: 22 /3/b Location: DVI-Burn Pit <br /> Client: URS Corporation Prep: EPA 3010A <br /> Pro'ect#: DVI-BP Anal sis: EPA 6010B <br /> Matrix: Water Batc 1 <br /> Units: ug/L Prepared: 04/21/11 <br /> Diln Fac: 1.000 Analyzed: 04/23/11 <br /> Type: BS Lab ID: QC588646 <br /> 3l9tt X' Result r. -'%REC. Limits <br /> Antimony buu.u : 14 r12u <br /> Arsenic 100.0 99. 11 99 80-124 <br /> Barium 2,000 1, 933 97 80-120 <br /> Beryllium 50.00 51.48 103 80-120 <br /> Cadmium 50.00 49.41 99 80-120 <br /> Chromium 200.0 191.0 95 77-120 <br /> Cobalt 500.0 469.0 94 78-120 <br /> Copper 250.0 242.9 97 74-120 <br /> Lead 100.0 93.31 93 75-120 <br /> Molybdenum 400.0 388.5 97 80-120 <br /> Nickel 500.0 478.9 96 78-120 <br /> Selenium 100.0 92.91 93 78-121 <br /> Silver 50.00 47.86 96 78-120 <br /> Thallium 100.0 103.9 104 79-120 <br /> Vanadium 500.0 483.5 97 80-120 <br /> Zinc 500.0 486.2 97 79-120 <br /> ,Type: BSD Lab ID: QC588647 <br /> Result '.' �REC '..Limits RPD'Antimony - <br /> Arsenic 100.0 101.4 101 80-124 2 20 <br /> Barium 2,000 1,984 99 80-120 3 20 <br /> Beryllium 50.00 53.69 107 80-120 4 20 <br /> Cadmium 50.00 50.96 102 80-120 3 20 <br /> Chromium 200.0 194.0 97 77-120 2 20 <br /> Cobalt 500.0 480.9 96 78-120 3 20 <br /> Copper 250.0 251.9 101 74-120 4 20 <br /> Lead 100.0 96. 60 97 75-120 3 20 <br /> Molybdenum 400.0 398.8 100 80-120 3 20 <br /> Nickel 500.0 487.4 97 78-120 2 20 <br /> Selenium 100.0 94.77 95 78-121 2 20 <br /> Silver 50.00 49.84 100 78-120 4 20 <br /> Thallium 100.0 104.4 104 79-120 1 20 <br /> ' Vanadium 500.0 501.1 100 80-120 4 20 <br /> Zinc 500.0 498.3 100 79-120 2 20 <br /> 1 <br /> RPD= Relative Percent Difference <br /> Page 1 of 1 25.0 <br /> 22 of 35 <br />