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' WATER WASTE WATER • HAZARDOUS WASTE• FUEL • AIR• SOIL D E LTA FENEF1 <br /> ENVIRONMENTAL LABORATORIES <br /> QUALITY CONTROL REPORT <br /> Method: EPA 8020 <br /> Client: Units: ug/L <br /> ' E2C, Inc. Client Project ID: 4780200 Analyst: J.F. <br /> 1220 Crossman Ave., Suite 200 Analyzed: 4/8/93 <br /> t Sunnyvale, CA 94089 QC Batch M 304-0276 QC Sample#: 3040265 <br /> Matrix: Water Reported: 4/15/93 <br /> ' Attention: Robb Welch <br /> ANALYTE Benzyne Toluene Ethyl- X ylenes <br /> ' Benzene <br /> Spike Concentration: 20 20 20 60 <br /> ' Matrix Spike % Recovery: 130 110 100 122 <br /> ' Matrix Spike Duplicate% Recovery: 130 115 105 128 <br /> Relative % Difference: 0.0 4.4 4.9 5.3 <br /> LCS % Recovery: 122 108 102 122 <br /> Control Limits: 70-130 70-130 70-130 70-130 <br /> ' DELTA <br /> Environmental Laboratories <br /> ' California Certification#:1 B57 <br /> (,714, � <br /> t H. Khosh Khoo, Ph.D., <br /> Laboratory Director/President <br /> 685 Stone Rood #11&12 • Benecia, CA 94510 • Tel: (707) 747-6081 (510) 676-1938 • Fax: (7071747-6082 <br />