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2852 Alton Ave Irvine CA 92714 (7141 261 t022 rAX(7141 261 1228 <br /> ®el Isar Analytical 1014 E Cooley Or Suite A Colton CA 92324 (909(370 4667 FAX(909)370 1046 <br /> 16525 Sherman Way Suite C I I Van Nuys CA 91406 (8 18)779 1844 FAX(8 181 7 79 1843 <br /> r }yv/�y�. �y rt�y+� L} <br /> } 4 ac Illi 4 A i1e1�o i <br /> EPA METHOD* 8020 <br /> matrix soil <br /> DATE 10/21/93 <br /> SAMPLE # Blank <br /> MEAN <br /> Analyte R1 Sp MS MSD PR1 PR2 RPD PR <br /> pptn PP=n ppm PPM % �% % — % <br /> Benzene 0 050 048 049 96% 98% 21% 97%� <br /> Toluene 0 050 051 052 102% 104°. 19% 4303% <br /> Ethylbenzene 0 050 052 054 104% 108% 38% 106% <br /> IXylenes 0 1 5 16 17 107% 113% _61% 110% <br /> Definition of Terms <br />' R1 Result of Sample Analysis <br /> 1 Sp . Spike Concentration Added to Sample <br /> MS Matrix Spike Result <br />' MSD. Majr(x Spike Duplicate Result <br /> PRI . . Percent Recovery of MS, ((MS-R1) / SP) X 100 <br /> PR2 Percent Recovery of MSD, ((MSD-R1) / SP) X 100 <br /> RPD Relative Percent Difference, ((MS-MSD)/(MS+MSD)/2)) X 100 <br /> Del Mar Analytical <br /> 1 <br />