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i <br /> i <br /> SUPERIOR ANALYTICAL LABORATORY, INC <br /> i 1555 BURKE UNIT I ' SAN FRANCISCO, CA 94124 • PHONE (415) 647-2081 <br />' C E R T I F I C A T E O F A N A L Y S I S <br /> LABORATORY NO. 80688 DATE RECEIVED 03/26/90 <br /> CLIENT Vapor Extraction Technology' DATE REPORTED 04/02/90 <br />' CLIENT JOB NO. 1. . 024 . 7 /420680 Stockton <br />' AIR ANALYSIS by NIOSH 1500 FOR TOTAL PETROLEUM HYDROCARBONS <br />' Lab4 Sample ID Vol . ( L ) Tot ( mg ) ( mg/m3 ) (ppm) <br /> 1 RW-1 6 --------- 2 . 0 330 ----- <br /> 2 MW-1 6 ------ 00 . 2 530 ------ <br />' 3 Mw-3' 10 ---------------- 1 2 170 ----- <br /> -1 MW-4 8 3 2 400 <br /> 1 � <br /> 4ethod Detection Limit TPH-0 1 mg <br /> 1 <br />' Edward R Morales <br /> L�j�- aboratory Manager <br />' f � <br />■ <br />■ <br /> OUTSTANDING QUALITY AND SERVICE <br />