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SMITH-EMERY COMPANY <br /> Thr Full 5erurce Independent Testing Laboratory, Established 2904 <br /> 781 East Washington Boulevard • Las Angeles.Calltortua 90021 <br /> P O Boot 880M Hunter's Point Shipyard Bldg 114 • San Fmnc sm,C4UOrrua 94188 s lam)7 • Far (2I3)74b7228 <br /> 5427 East 1,Palma Avenue (4L5)3330.3000.3001 0 • Fax (419)822-58M4 <br /> • Axwhom CAUonua 9=7 • (714)693-1026 • Fart(n4)693-10134 <br /> August 11, 1993 <br /> Quality Control Report <br /> Matrix Spike and Duplicate Spike <br /> Client Aqua Geosciences <br /> File No 72461 <br /> Report No 32150806 <br /> Matrix. Soil <br /> Method EPA 8020 <br /> Lab No 3215153005 <br /> Batch No: 32178020-1 <br /> SPIKE <br /> SAMPLE AMOUNT AMOUNT RECOVERY <br /> RESULTS SPIKED RECOVERED ACCEPTANCE <br /> F TERu� P/kal (ug/k u k % REC RANNGE M R•P D. <br /> Benzene (S) ND 185 141 76 <br /> Benzene (DS) ND 214 167 78 64-125 2% <br /> Toluene (S) ND 185 147 79 <br /> Toluene (DS) ND 214 174 81 70-118 2% <br /> Ethyl. Benzene (S) ND 185 150 81 <br /> Ethyl Benzene (DS) ND 214 177 83 70-121 2% <br /> Xylene (S) ND 555 490 88 <br /> Xylene (DS) ND 642 575 90 67-126 1% <br /> S — Spike <br /> DS — Duplicate Spike <br /> R P D — Relative Percent Difference <br /> 4 — Nome Detected <br /> ALL REPORTS AftE 3UaMITTEC AS TME GONF{DENTIAL PROPERry or CiJCNTa.AUTHORIZATION FOR PUpLICATION or OUR R(PORT CONCLUSJONS.OR EX- <br /> TRACTS"Mm OR RICQAROING THEM Ia REBERVED PENDING OUR WRITTEN APPROVAL ASA MUTUAL PROTECTION TOC LIENTS,TMC PUNUC AND OURSELVES <br />