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TABLE 5 CONCENTRATIONS OF HYDROCARBON CONSTITUENTS IN SOIL <br /> VAPOR AT FORMER EXXON RS 7-1050, 909 W. HAMMER LANE, <br /> STOCKTON CALIFORNIA 23 24 NOVEMBER 1987 <br /> Peaks <br /> Prior to Total Detected <br /> I Sample Depth Benzene Benzene Toluene Hydrocarbons <br /> Location ( ft ) f 1Jpm)a ( Ppm) (ppm) (ppm )a <br /> MW1 - 20 < 1 550 1 , 250 <br /> MW2 = < 1 < 1 < 5 < 5 <br /> MW3 410 150 1 , 050 3 , 000 <br /> MW4 - 60 10 700 1 , 500 <br /> MW5 - < 1 < 1 10 20 <br /> V1 17 < 1 < 1 1 < 2 <br /> V2 16 . 5 < 1 < 1 < 1 < 1 <br /> V3 15 . 5 < 1 < 1 < 1 < 1 <br /> V4 17 < 1 < 1 < 1 < 1 <br /> V5 18 < 1 < 1 5 < 10 <br /> V6 23 5 < 1 < 1 < 1 < 1 <br /> BLANK DATA <br />■ Peaks <br /> Prior to <br /> Test Benzene Benzene Toluene <br /> Date Time ( I)ym )a ( pnm) ( ppm ) <br /> 23 Nov 1408 <0 . 1 < 0 . 1 < 0 . 1 <br /> 24 Nov 1058 < 0 1 < 0 . 1 < 0 . 1 <br /> 24 Nov 1417 < 0 . 1 < 0 1 < 0 . 1 <br /> 24 Nov 1610 < 0 . 1 < 0 1 < 0 1 <br /> PERCENTAGE OF STANDARD RECOVERED <br /> Test Standard <br /> Date Time Benzene Toluene <br /> 23 Nov 1421 100 100 <br /> 24 Nov 1105 100 100 <br /> 24 Nov 1314 90 95 <br /> a . Quantification based on V-sec :ppm ratio for benzene ( see <br /> text ) . <br /> I <br />' x25/71050/8-89/tbl5 <br />