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~6.~ Laboratories, inc. <br />2773 Downhill Drive Steamboat Springs, CO 80487 (800J 334-5493 <br />Abbreviation Description ~ Container Type Preservative/Limits <br />R Raw/Nitric RED pH must be <2 <br />B Filtered/Sulfudc BLUE pH must be c 2 <br />BK Filtered/Nitric BLACK pH must be < 2 <br />G Filtered/Nitric GREEN pH must be < 2 <br />O RawlSulfuric ORANGE pH must be <2 <br />P Raw/NaOH PURPLE pH must be> 12' <br />T Raw/NaOH Zinc Acetate TAN pH must be>12 <br />Y RawlSulhuic YELLOW pH must be c 2 <br />YG RawlSulfuric YELLOW GLASS pH must be < 2 <br />N/A No preservative needed Not applicable <br />RAD Gamma/Beta dose rate Not applicable must be < 250 pR/hr <br />' pH check performed by analyst prior to sample preparation <br />Sample IDs Reviewed By: <br />REPAD.03.11.00.01 <br />L56030: Page 16 of 19 <br />Kerr Coal Company ACZ Project ID: L56030 <br />Date Received: 4/13/2006 <br />Received By: <br />