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SMITH-EMERY COMPANY <br /> The Fall Service Independent Testing Laboratory, Established 1904 <br /> 4 781 East Washington Boulevard o Los Angeles,Callfornia9=1 a (213)749,9411 a Pax:(213)746.7228 <br /> P.O.Box BOOM,Hunter's Point Shipyard Bldg.114 a San Francisco,GRfotnia 94188 a (413)3303000 a Pax:(415)822.5864 <br /> 5427 East La Palma Avenue a Anaheim,California 92807 {714)693.1026 a Fax:(714)693-10134 <br /> July 26, 1993 <br /> Quality Control Report <br /> Matrix Spike and Duplicate Spike <br /> i <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 /> E ' <br /> r <br /> SPIKE <br /> SAMPLE AMOUNT AMOUNT RECOVERY <br /> RESULTS SPIKED RECOVERED ACCEPTANCE <br /> PARAMETER ,(ug/kg) (ug/kg) ug/kg) X REC RANGE(%) R.P.D. <br /> Benzene (S) ND 143 121 84 <br /> Benzene (DS) ND 128 120 93 64-125 9% <br /> Toluene (S) ND 143 119 83 <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 /> S - Spike <br /> DS - Duplicate Spike <br /> R.P.D. - Relative Percent Difference <br /> ND - None Detected <br /> ALL REPORTS ARE SUBMITTED AS THE CONFIDENTIAL PROPERTT OF CLIENTS.AUTNORI7,ATION FOR PUSLICATION OIr OUR REPORT.CONCLUSIONS,OR CX- <br /> TRACTS FROM OR REGARDING THEM IS RESERVED PENDING OUR WRITTEN APPROVAL AS A MUTUAL PROTECTION TO CLIENTS.THE PUBLIC AND OURSELVES. <br />