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SMITH - EMERY COMPANY <br /> Thu Fall 'II r,IL I bot p mit W Tt slm%: f.rr wrahlry L,fr bh,ht d I904 <br /> 781 East%%jshlnktonBoult%ard • Lo%Angtles Cahtt'MI490021 • (213)799 3411 • Fat {2131 746 7228 <br /> PO Bot ABlliill Hunter s f nmt Shlpard Bldg 114 • San Frano,co Calanrnra 94188 • 141iy 3311 30011 • Fat 141 s 330 3030 <br /> 5427 East La Palma ANenur • Anahtsm Callfomia9280" • (7 141693 1026 • Fax I"141 h93 1034 <br /> June 16, 1994 <br /> Quality Control Report <br /> Matrix Spike and Duplicate Spike <br /> Client Thrifty 011 Co <br /> File No 72537 <br /> Report No 41521350 <br /> Matrix Water <br /> Method EPA 602/8015 <br /> Lab No 4153152700 <br /> Batch No 4154602-1 <br /> Date Analyzed 06/03/94 <br /> SPIKE <br /> SAMPLE AMOUNT AMOUNT RECOVERY <br /> RESULTS SPIKED RECOVERED ACCEPTANCE <br /> . PARAMETER (ug/1L (ug/1) (US/1) % REG RANCE(%) _ RR,P_ U <br /> Benzene (S) ND 9 1 8 0 88 <br /> Benzene (DS) ND 9 1 8 0 88 77-120 1X <br /> Toluene (S) ND 9 1 8 2 90 <br /> Toluene (DS) ND 9 1 8 2 90 75-115 1X <br /> Ethyl Benzene (S) ND 9 1 8 1 89 <br /> Ethyl Benzene (DS) ND 9 1 8 2 90 60-130 1X <br /> Xylene (S) ND 27 3 26 0 96 <br /> Xylene (DS) ND 27 3 26 0 97 50-130 1% <br /> S — Spike <br /> DS a Duplicate Spike <br /> R P D Relative Percent Difference <br /> ND None Detected <br /> 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 15 RESERVED PENDING OUR WRITTEN APPROVAL AS A MUTUAL PROTECTION TO CLIENTS THE PUBLIC AND OURSELVES <br />