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MBRIA "� 8 � p�,•{s ,�, r, .; s "a t �'�r "` '�',v' ,' i ° �a k� 3 3':.r `' y' 4.`: �` �- +", a �L a� 3 °' zi� �m G�1 ,� -' , � ` , r'F*h• a w 3}�„ S 'ia tta- K r� '��a �' �rsZt s^ `C` .€,ate�^1F "" 3.q � �� a'�M .�".. -,: «� Table 3 Groundwater Eztrachon Mass ltemaval Data Shell-branded 5ervrce Station 2575�GountFy CIu BoulevardStocktonCallfornla E 4 _ TPHg Benzene MTBE Site Flow Meter Cumulative Flow TPHg Period Cumulative Benzene Period Cumulative MTBE Period Cumulative Visit Reading Volume Rate Cone Removal Removal Conc Removal Removal Conc Removal Removal Active (rnWcldl ) (gal) (gal) ( m) ( b) (Rounds) (pounds) (ppb) (pounds) (pounds) (22b) (pounds) (pounds) Wells Comments 05/31101 20 0 0 0 0 RW-1A Startup samples taken 05/31/01 220 200 36 000 0 060 0 060 9,400 0 016 0 016 63 000 0 105 0 105 RW-IA Continuous groundwater extraction and 06/20/01 290 270 000 3 000 0 002 0 062 650 0 000 0 016 2 800 0 002 0 107 RW-IA sewer discharge began 06/25/01 6 950 6 930 093 28 000 156 1 62 5 700 0 317 0 333 16 000 0 889 0 996 RW-IA 07116/01 8 222 8202 004 34 000 0 361 198 9 800 0 104 0 437 61 DOO 0 647 1 64 RW-I A 0723/01 16 610 16590 083 23 000 161 359 460-0 0 322 0 759 33,000 231 395 RW-IA 08/02101 31200 31 180 101 47 000 572 931 12 000 146 222 8700.0 106 145 RW-IA 08/20101 33 320 33 300 000 44 000 0 778 101 11 000 0 195 241 99 000 175 163 RW-IA 09/06/01 67 750 67 730 141 50 000 144 245 10 000 287 529 1:0 000 316 479 RW-I A 09/21/01 96 310 96 290 1 32 53,000 126 37 1 9 800 234 762 110 000 262 74 1 RW-IA 10/03/01 98 030 98 010 010 47 000 0 675 378 12 000 0 172 780 150 000 2 15 763 RW-IA 10/16/01 100 400 100 380 013 45 000 0 890 386 12 000 0 237 803 200 000 396 802 RW-IA Carbon changeout performed on 11/1/01 System downtime approximately 12 11/08/01 104340 104 320 012 <5O 000 0 822 395 12 000 0 395 843 160 000 526 855 RW IA hours i 11/21101 109 740 109,720 029 33 000 149 410 9 000 0 406 883 110 000 496 90 4 RW IA 12/12/01 111 110 111 090 005 120 000 1 37 423 9 700 0 111 894 120 000 137 91 9 RW-IA 12/28/01 168 190 168 170 248 33 000 1572 580 8 600 4 096 1304 98,000 4668 1385 RW-I A System down due to damaged power 01/26/02 322 220 322 200 369 55 000 7069 1287 9 300 11 953 2499 91000 11696 2554 RW-IA lines Re stared 1/10/02 Carbon changeout performed on 2!12102 System downtime approximately 24 02/22/02 449 770 449 750 328 63 000 6705 1958 7 900 8 408 3340 78 000 8302 3385 RW IA hours 03/06/02 513 200 513 180 367 13 000 688 2027 1 400 0 741 3414 11 000 592 3443 RW IA 03/27/02 569 340 569 320 1 86 NS 2389 2266 NS 3 513 3766 NS 3701 3813 RW IA 04/01/02 587 495 587 475 252 51000 773 2343 7 500 1 136 3879 79 000 1197 393 3 RW IA System turned off 4/1 and restarted 4123 040-5/02 595 400 595,380 023 44 000 290 2372 7200 0 475 3927 87 000 574 3990 RW-IA Carbon changeout performed on 4/17102 05/27/02 679 800 679 780 2 17 57 000 4D 14 2773 7 500 5 282 4455 69 000 4959 4476 RW-IA 06/19/02 769 900 769,880 223 86 000 6466 3420 7 800 5 864 5041 62 000 4661 4942 RW IA 06/26/02 794 831 794 811 247 60000 1248 3545 6 900 1 435 5185 66 000 1373 5079 RW IA Carbon changeout performed on 7/17102 0783 Page 1 of 3