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*I Batch QC Report cb Curtis &7ompkrns Ltd <br /> tt�p TompkiAo L4hQratorieg Analyti,o41 RE§pQrt <br /> Lab # 172884 Location SDHR-Carando <br /> Client Treadwell & Rollo Prep EPA 3010 <br /> Project# 2597 10 Analysis EPA 6010D <br /> Matrix Water Batch# 92076 <br /> Units ug/L Prepared 06/18/04 <br /> Diln Fac 1 000 Analyzed 06/21/04 <br /> Type B5 Lab ID QC254649 <br /> Cadmium 50 00 53 80 108 80-120 <br /> Chromium 200 0 207 0 104 80-120 <br /> Copper 250 0 258 0 103 60-120 <br /> Lead 100 0 104 0 104 61-131 <br /> Nickel 500 0 518 0 104 80-120 <br /> Zinc 500 0 531 0 106 80-120 <br /> Type BSD Lab ID QC254650 <br /> . s Spiked %P.80 i to 'J7 <br /> Cadmium 50 00 55 80 112 80-120 4 20 <br /> Chromium 200 0 212 0 106 80-120 2 20 <br /> ('f'pl�Gr 250 0 265 0 106 80-120 3 20 <br /> Lead 100 0 109 0 109 61-131 5 29 <br /> Nickel 500 0 531 0 106 80-120 2 20 <br /> Zinc 500 0 546 0 109 80-120 3 20 <br /> 1 i <br /> 0. <br /> RPD= Relative Percent Difference 1 <br /> Page 1 of 1 llo <br /> 1 <br />