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Curtis &Tompkins.Ltd. <br /> LABORATORY NUMBER: 104953 - 3 DATE RECEIVED: 08 / 23 / 91 <br /> CLIENT : TREADWELL & ROLLO DATE ANALYZED: 08 / 25 , 29 / 91 <br /> PROJECT ID : 1107A DATE REPORTED: 09 / 06 / 91 <br /> LOCATION: MLANTECA <br /> SAMPLE ill: MW- 3 SoUPC.e• MW -3 <br /> Title 26 Metals in Aqueous Solutions <br /> METAL RESULT REPORTING METHOD <br /> LIMIT <br /> ug /L ug /L <br /> Antimony ND 60 . 0 EPA 6010 <br /> Arsenic 15 . 7 5 . 0 EPA 7060 <br /> Barium 614 10 . 0 EPA 6010 <br /> Beryllium ND 2 . 0 EPA 6010 <br /> Cadmium ND 5 . 0 EPA 6010 <br /> Chromium ( total ) 88 . 6 10 . 0 EPA 6010 <br /> Cobalt 35 . 6 18 . 0 EPA 6010 <br /> Copper 141 10 . 0 EPA 6010 <br /> Lead 18 . 5 3 . 0 EPA 7420 <br /> Mercury ND 0 . 2 EPA 7470 <br /> MloIvbdenum ND 14 . 0 EPA 6010 <br /> Nickel 87 . 8 32 . 0 EPA 6010 <br /> Selenium ND 5 . 0 EPA 7740 <br /> Silver ND 10 . 0 EPA 6010 <br /> Thallium ND 5 . 0 EPA 7841 <br /> Vanadium 227 10 . 0 EPA 6010 <br /> Zinc 191 20 . 0 EPA 6010 <br /> ND = Not detected at or above reporting limit . <br /> QA/QC SUMMARY <br /> RPD ,% RECOVERY,% RPD,%a RECOVERY,% <br /> Antimony 5 93 Mercury 6 99 <br /> Arsenic 3 100 Molybdenum 7 107 <br /> Barium <1 99 Nickel 4 95 <br /> Beryllium 3 101 Selenium 7 114 <br /> Cadmium 8 101 Silver 7 97 <br /> Chromium 5 98 Thallium <1 106 <br /> Cobalt 11 100 Vanadium 4 95 <br /> Copper <1 98 Zinc 11 100 <br /> Lead <1 119 <br />