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B C LABORATORIES <br /> LABORATORIES QUALITY CONTROL REPORT <br /> (Precisxon & Accuracy) <br /> METHOD 8020 TPH GAS <br /> ARCADIS GERAGHTY & MILLER INC Date of Report 01/20/99 <br /> 1400 N HARBOR BLVD , SUITE 7D0 Sample Matrix Groundwater <br /> FULLERTON, CA 92835-4127 <br /> REINHARD RUHMKE <br /> Samples Affected 98-13703-1 - 98-13703-5, 98-13703-TB <br /> 4 <br /> II I I I I ] ME I MSD I I I Precision) I Accuracy <br /> Sample ] MS I MSD ] Spike I Spike I ISpike I Control I MS I MSD I Control <br /> 1Constituents IQC Sample ID I Result I Result I Result I Level I Level IUnits IR P D I Limits It Rec It Rec I Limits 1 <br /> I _ <br /> IlBenzene 1370 -3 < 0 3 50 52 50 50 L 4 10 100 1104 80 - 1201 <br /> 1Toluene 13703-3 < 0 3 45 46 50 50 L 1 101 91 1 91 80 - 1201 , <br /> Ethyl Benzene - 113703-3 - 1 c 0 3 I 4,6 I 46 1 5o I 50 _ lug/L I _1 I 101 921 92 I 80 - ILD-0 ` <br /> 1Meth 1-t-but lether 13703-3 c 1 50 52 So 50 L 4 10 100 1104 80 - 1201 <br /> 1 &m-x lenes 13703-3 c 0 6 90 go 100 100 L 0 1.01 90 1 90 80 - 1201 <br /> llo-x lens 13703-3 < 0 3 47 47 50 50 L 1 101 94 1 94 80 - 1201 <br /> 1Total Petroleum I I I I i I I I 1 I I I . 1 <br /> 1 Hydrocarbons (gas) OFW < so 970 a 1 1009 4 980 980 L 10 1 ---101 99 1103 1 65 - 1151 <br /> 1Surrogate IMS/MSD I 1 ] I I I I I s 172 1 77 1 70 - 130 <br /> s <br /> M5 Matrix Spike, MSD Matrix Spike Duplicate RPD Relative Percent Difference <br /> Quality Co Officer <br /> � ` nt 0• nri0 ' <br /> 4100 Atlas Ct • Bakersfield, CA 933QB (8051327-491 1 FAX{805]327-1916 <br />