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fi l <br /> SMITH-EMERY COMPANY --- <br /> The Full Service Independent Testing Laboratory, Established 1904 <br /> 781 East Washington Boulevard a Las Angeles,California 90021 a (213)749-3411 a Fax:(213)746-7228 <br /> P.O.Box 880550,Hunter's Point Shipyard Bldg.114 a San Francisco,California 94188 a (415)330-3000 a Fax:(415)822.5864 <br /> 5427 East La Palma Avenue a Anaheim,Callfornia 92807 a (714)693-1026 a Fax:(714)693-1034 <br /> July 26, 1993 <br /> Quality Control Report <br /> Matrix Spike and Duplicate Spike <br /> 1 <br /> i <br /> ii Client: Aqua Geosciences <br /> File No, 72461 <br /> „ Report No: 31951744 <br /> ! Matrix: Soil <br /> ; Method: EPA 8020 <br /> jLab No: 3194115105 <br /> Batch No: 31978020-1 <br /> I I <br /> ii SPIKE <br /> SAMPLE AMOUNT AMOUNT RECOVERY <br /> RESULTS SPIKED RECOVERED ACCEPTANCE <br /> PARAMETER (ung) (ung) (ug/kg) % REC RANGE(%) R.P.D. <br /> 1 <br /> i <br /> �y Benzene (S) ND 343 121 84 <br /> t 'L Benzene (DS) ND 128 120 93 64-125 9% <br /> i Toluene (S) ND 143 119 83 <br /> ! Toluene (DS) ND 128 121 94 70-118 131 ` <br /> lj Ethyl Benzene (S) ND 143 123 86 <br /> EI+, 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% I <br /> t. <br /> v <br /> i' <br /> S a Spike <br /> DS — Duplicate Spike <br /> A.P.D. s Relative Percent Difference I <br /> ' ND = None Detected <br /> k3 ALL REPORTS ARE SUBMITTED AS THE CONFIDENTIAL PROPERTY OF CLIENTS.AUTHORIZATION FOR PUBLICATION OF OUR REPORT.CONCLUSIONS.OR EX- <br /> TRACTS FROM OR REGARDING THEM IS RESERVED PENDING OUR WRITTEN APPROVAL AS A MUTUAL PROTECTION TO CLIENTS.THE PUBLIC AND OURSELVES. <br /> CI <br /> ki <br />