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ANALYTICAL ~ LABORATORY TESTING SERVICES <br />~ LABORATORY <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 />DETECTION <br />LIMIT <br />0.01 <br />1 <br />0.002 <br />0.001 <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 (1) <br />EPA 120.1 (I) <br />EPA 7740 (2) <br />EPA 7841 (2) <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 />ANALYSIS SUPERVISED BY <br />LAB NO: 8844 <br />DATE RCVD: 04/13/00 <br />REPORTED: OS/OS/00 <br />PO: VERBAL <br />REPORTING <br />UNITS <br />UNITS <br />uS/CM <br />mp~L <br />mg/L <br />D A APPROV D FOR RELEASE BY <br />~A~ 240 S. Mein Street Brighton, Colorado 80601 (3031 659-2313 <br />Meiling Address: PO. Drawer 507, Brighton, Colorado 80601 <br />