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SIERRA LABORATORIES,INC. <br /> Park Environmental Cbz porafson Sierra Client No. 10000-92 `Date Sampled: .04129/94 <br /> 4231 Pacific Stred Suite 7 Sierra Project No: 9405-06. Date Received: ,05/03194 <br /> Rocklin `CA 95677 . .. Clienit Project No. 5016-7.1 Date Prepared: 05/05/94 <br /> Client Project: Date Analyzed: .05/05194 <br /> NIA <br /> Sample Preparation; EPA Method 5030 <br /> Sample'Analysis:,EPA 8020(BTEX) Report Date: xsn6/94 <br /> Matrix/Spike Duplicate Report <br /> Sample Type: Solid _ <br /> Benzene Toluene Ethylbenzene Xylenes,Total <br /> (Range) (Range) (Range) (Range) <br /> Matrix Spike 74 75 75 76 <br /> Recovery(%) (39-150) (46-148) (32-160) (37-154) <br /> Matrix Spike Duplicate 86 88 88 88 <br /> Recovery(%) (39-150) (46-148) (32-160) (37-154) <br /> Relative Per-cent 1S 16 17 14 <br /> Difference (0-30) (0-30) (0-30) (0-30) <br /> Quality Central Reference Number: 9405-06 <br />