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CHROMALAB, INC. <br /> ' Environmental Services(SDB) <br /> March 27, 1998 Submission # 9803309 <br /> ' AQUA SCIENCE ENGINEERS INC <br /> Atten Charlie Rous <br /> Protect UNOCAL Protect#: 3254 <br /> Received March 20, 1998 <br /> Ire Surrogate report for 1 sample for TEPH analysis <br /> Method EPA 8015M <br /> Lab Run# 11777 <br /> Matrix WATER <br /> % Recovery <br /> Sam le# Client Sample ID Surrocrate Recovered Limits <br /> % Recovery <br /> Sample# OC _Sample Type Surrogate Recovered Limits <br /> 176772-1 Reagent blank (MDB) O-TERPHENYL 99 2 60-130 <br /> 176773-1 Spiked blank (BSP) O-TERPHENYL 100 60-130 <br /> 176774-1 Spiked blank duplicate (BSD)O-TERPHENYL 89 0 60-130 <br /> solo <br /> pC5URR1229 8liAVlIK 27 Mar 98 <br /> 1220 Quarry Lane• Pleasanton, California 94566-4756 <br /> (510) 484-1919 • Facsimile (510) 484-1096 <br /> Federal ID #68-0140157 <br />