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Table C-4 <br /> Srrrnrnary of Mass Calculations forBTEX(ppm) <br /> 1=onner Tank Site#2 <br /> 1325 West WeberAvenree,Stockton,CA <br />' Post-Excavahon Sampling Locations Exceeding Remedial Goal <br /> De th ft-b s E33 5S2 5 E28511 E31N5 5 E38NS S2-B3 S2-134 E18N18 E1N3 <br />' 5 124 499 75 972 78 814 55 654 3 764 25 01342 01943 <br /> 6.5 1469 895 928 655 2315 348 02244 03250 <br /> 723 1241 756 783 552 2763 298 02738 03964 <br /> 75 1162 707 733 517 2566 281 02963 04291 <br />' 8 1022 622 644 454 2254 250 1 287 1863 <br /> 9 769 467 483 340 1691 193 07911 11275 <br /> 95 657 398 412 290 1439 167 06744 09565 <br />' 10 553 335 346 243 1209 144 05670 07990 <br /> 105 459 277 286 201 997 121 04691 06550 <br /> 11 373 225 231 162 805 1008 03805 05245 <br /> 1135 319 192 197 137 684 88 03241 04412 <br />' <br /> 117 269 161 165 115 5715 75 02723 03645 <br /> 125 172 101 103 71 353 50 01713 02140 <br /> 135 83 47 46 30 152 25 00787 00745 <br />' 14 52 28 26 16 81 15 00466 00250 <br /> 141 47 25 23 14 70 13 00413 00167 <br /> 112 42 22 20 12 59 11 00364 00090 <br /> 143 38 19 17 09 49 10 00318 00018 <br /> 144 34 17 14 08 40 08 00276 00000 <br /> • <br /> 145 31 14 12 06 31 07 00238 00000 <br /> 146 27 12 10 04 23 05 00204 00000 <br /> 147 24 11 08 03 17 04 00174 00000 <br /> I 148 22 09 06 02 11 02 00147 00000 <br /> 149 20 08 05 01 05 01 00124 00000 <br /> 15 18 07 03 00 01 00025 00105 00000 <br /> 16 00 00 00 00 01 00025 00120 00000 <br /> ITotal BTEX Average Concentration= 230 <br /> Average depth to remedial goal(1 0 ppm)= 83 <br /> BTEX MASS(lb)After Excavation <br /> Thickness(ft)= 8 3 <br /> Surface Area(fe)= 1124 <br /> Volume(W)= 10540 <br /> Total Mass(lb)= 24 2 <br /> Note <br /> Bolded values are actual data points <br /> The thickness value is the depth below the depth of the first data point at a sample location For example, <br /> if a sample was taken at 5 feet and the thickness is S 3 feet,the total depth below ground surface is 13 3 feet <br /> 2996Catellus Stockton\1999 Closure Report\report tables\Site#2 Mass Cales <br />