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n Superior Precision ,Ir7a/ytical, Ir7c_ <br /> 825 Arnold Drive Suite 1 14 - Martinez California 94553 ■ (510) 229-1512 / fax (5 10) 229-1526 <br /> C E R T I F I C A T E O F A N A L Y S I S <br /> LABORATORY NO 88239 DATE RECEIVED 04/02/93 <br /> CLIENT WESTERN GEO ENGNEERING DATE REPORTED 04/06/93 <br /> CLIENT JOB NO R603 DATE SAMPLED 04/01/93 <br /> ANALYSIS FOR CADMIUM, CHROMIUM, COPPER, LEAD, ZINC & NICKEL <br /> by EPA SW-846 Method 6010 <br /> LAB Concentration (mg/L) <br /> # Sample Cadmium Chromium Copper Lead Zinc Nickel <br /> Identification <br /> 1 CONCOULT ND ND ND ND 0 11 ND <br /> mg/L - parts per million (ppm) <br /> Method Detection Limit for Cadmium in Water 0 . 05 mg/L <br /> Method Detection Limit for Chromium in Water 0 05 mg/L <br /> Method Detection Limit for Copper in Water 0 1 mg/L. <br />. Method Detection Limit for Lead in Water 0 1 mg/L <br /> Method Detection Limit for Zinc in Water 0 05 mg/L <br /> Method Detection Limit for Nickel in Water 0 1 mg/L <br /> QAQC Summary- MS/MSD Average Recovery 87/98% <br /> Duplicate RPD 20 <br /> Richard Srna, Ph D <br /> Laboratory Manage <br /> Certified Laboratories <br />