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SMITH-EMERY COMPANY <br /> The Ful!Serrrice fndependerrt Testing Laboratory, Established 7904 <br /> 781 East Washington Boulevard <br /> P.O.Box 8803. 'Hunters Point Shipyard Sld 114 0 Los Angeles.California 90021 • <br /> PY g• San Francisco,CaBfornla 94188 • (213)749-3411 • Fax:(213)746, x8 <br /> 3427 East V Palma Avenue (415)330-3000 • Fax;(4I5)812.5864 <br /> • Anaheim,California 92807 • .(714)693-1026 • Fax• <br /> .(714)693-1014 <br /> July 26, 1993 <br /> Quality Control Report <br /> Matrix Spike and Duplicate Spike <br /> Client: Aqua Geosciences <br /> File No: 72461 <br /> Report No: 31951744 <br /> Matrix: Soil <br /> Method: EPA 8020 <br /> Lab No: 3194115105 <br /> Batch No: 31978020-1 <br /> SAMPLE AMOUNT AMOUNTSPIKE <br /> RESULTS SPIKED RECOVERED RECOVERY <br /> PARAMETER ACCEPTANCE <br /> (ugfk8) fu::/lC _ REC RANGE XR.P.D. <br /> Benzene (S) ND 143 121 84 r <br /> Benzene (DS) ND 128 120 93 64-125 9% <br /> Toluene (S) ND 143 119 83 N <br /> Toluene (DS) ND 128 121 94 70-118 13% <br /> Ethyl. Benzene (S) ND 143 123 86 <br /> Ethyl Benzene (DS) ND 128 124 96 70-121. 11% <br /> Xylene (S) ND 429 372 87 <br /> Xylene (DS) ND 384 374 97 67-126 11% <br /> i <br /> S — Spike <br /> I <br /> DS — Duplicate Spike <br /> R.P.D. — Relative Percent Difference <br /> ND — None Detected <br /> ALL REPORTS ARE SU&MrrEGARDITCO AS THE CONFIQENTIAL PROPERTY OF CLIENTS,AUTMOR1ZATtoN FOR PUBLICATION OR OUR REPORT CONCLUSIONS.OR CX- <br /> TRACTSFROM OR REOAROING TMCM IS RCS[RVEQ PCNOING OUR WRMrCN APPROVAL AS A MUTUAL PROTECTION TO CLICNTS•THE PUBLIC ANO OURSCLVLS- <br />