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PNCaO N P 0 o 8 A T E U REPORT OF LABORATORY ANALYSIS <br /> THE ASSURANCE OF QUALITY <br /> Mr. Brian Thomas QUALITY CONTROL DATA May 24, 1993 <br /> Page 13 PACE Project Number- 430513521 <br /> Client Reference: Exxon 7-3942 (EE) <br />' Sulfide, Reactive <br /> Batch: 70 21245 <br /> Samples. 70 0070287 <br />' METHOD BLANK AND SAMPLE DUPLICATE. <br /> Duplicate <br />' Method of <br /> Parameter Units MDL Blank 700071518 70 0071518 RPD <br /> Sulfide, Reactive mg/kg wet 1 .0 ND ND ND NC <br />' LABORATORY CONTROL SAMPLE AND CONTROL SAMPLE DUPLICATE: <br /> E <br /> Reference Dupl <br />' Parameter Units MDL Value Recv Recv RPD <br /> Sulfide, Reactive mg/kg wet 1 .0 630 46% 46% 0% <br /> 1 <br /> 1 <br /> 1 <br /> 1 <br /> I t Digital Drive Offices Serving Minneapohs Minnesota Charlotte North Carolina An Equal Opportunity Employer <br /> Novato CA 94949 Tampa Florida Asheville North Carolina <br /> TEL 415 883 6100 Iowa City Iowa New York New York <br /> FAX 415 883 2673 San Francisco California Pittsburgh Pennsylvania <br /> Kansas City Missouri Denver Colorado <br /> !os Angeles California <br />