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SMITH-EMERY COMPANY <br /> The Full Service Independent Testing Laboratory, Established 1904 <br /> 781 bast Washington Boulevard • We Angeles,Califomia 90021 a (2l3)749.3411 is Fax:(213)746.7228 <br /> P.O.Box$801550.Hunter's Point Shipyard Bldg.114 • San Fmndxv.Callfomla 94168 a (415)330-30W a Fax:(4 15)822.5864 <br /> SW Fast La Palma Avenue • Ansheim.California 92807 a (714)693.1026 + Fax:M4)693-1034 <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: 3200053329 <br /> Batch No, 32008020-1 <br /> SPIKE <br /> SAMPLE AMOUNT AMOUNT RECOVERY <br /> RESULTS SPIKED RECOVERED ACCEPTANCE <br /> 4 <br /> WK/IceC Z (ue/k�z) (ug/kg % REC RANGE(%) R.P.D- <br /> Benzene (S) ND 155 121 78 <br /> Benzene (DS) ND 160 133 83 64-125 6% <br /> Toluene (S) 10 155 121 72 <br /> Toluene (DS) 10 160 137 79 70-118 10% <br /> Ethyl Benzene (S) ND 155 131 85 <br /> Ethyl Benzene (DS) ND 160 147 92 70-121 8% <br /> Xylene (S) ND 465 392 84 <br /> Xylene (DS) ND 480 441 _ 92 67-126 9% <br /> 1 <br /> i <br /> i <br /> S — Spike <br /> DS - Duplicate Spike <br /> R.P.D. - Relative Percent Difference <br /> - None Detected <br /> f <br /> ALL ACPORTs ARE SUBMiTTen As THC CONF1DE"AL PROPERTY O#CLIENTy.AUTHORISATION FOR PUBLICATION OI OUR REPORT.CONCLUSION&OR ex- <br /> TRACTs FROM on RCOARDING THEM is RESCRVen P040INr3 OUR WRITTEN APPROVAL As A MUTUAL PROTCCTION TO CUCMT&TME PUBLIC AND OURSELV"- <br />