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COLORADO <br />ANALYTICAL <br />LABORATORY <br /> <br />LABORATORY TESTING SERVICES <br />LABORATORY ANALYSIS REPORT <br />TO: STEVE MOSSBERG <br />COMPANY: SOUTHDOWN, INC. <br />LYONS CEMENT PLANT <br />P.O. BOX 529 <br />LYONS, CO 80540 <br />PROJECT: SURFACE WATER TESTING - A PIT <br />PO: VERBAL <br />PARAMETER <br />pH <br />SPECIFIC CONDUCTANCE <br />TOTAL SELENIUM <br />TOTAL THALLIUM <br />mg/L =MILLIGRAMS PER LITER OR PPM <br />METHOD <br />REFERENCE <br />EPA 150.1 (I ) <br />EPA 120.1 (1) <br />EPA 7740 (2) <br />EPA 7841 (2) <br />DETECTION <br />LIMIT <br />0.01 <br />I <br />0.002 <br />0.001 <br />(I) EPA = "METHODS OF CHEMICAL ANALYSIS OF WATER & WASTES"; USEPA; <br />EPA-600/4-79-020 REV 3/83 <br />(2) EPA =TEST METHODS FOR EVALUATING SOLID WASTE; USEPA; SW-846; NOV. 1986; <br />THIRD EDITION <br />REPORTMG <br />UNITS <br />UNITS <br />uS/CM <br />mg/L <br />mg/L <br />~N` <br />A ALYSIS SUPERVISED BY D A PP V F ELEASE BY <br />~A~ 240 S. Mein Street Brighton, Colorado 80601 (303) 659-2313 <br />Mailing Address: F?O. Drawer 507, Brighton, Colorado 80601 <br />LA8 NO: 1584.01 <br />DATE RCVD: 09/29/00 <br />REPORTED: 10/12/00 <br />