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I <br /> Table-4: MW-108 Natural Attenuation Estimate <br /> Valentine(Castle�Motors) <br /> Project No.723.2 <br /> (1) (2) -,(3) (4) (5). (6) (7) (8) (9) <br /> Reported Benzene Benzene First Order Decay -Apply 30%Factor of <br /> MW-108 -0.0004 -0.001. (Estimated) Safety <br /> Benzene Time Time from present - Date Time Date <br /> (pg/L) (pg/L) (pg/L) (days) (days) (mm/dd(yygy) (days) (mm/d&yyyy) <br /> 03/23/04 7,800 - - O _ 03/23/04 <br /> 0906104 1,480 --. 44 ._ - ; 05/1004 _. <br /> ',. 08/06/04 10 -. 136 - 08/06/04 <br /> . .10/21/04 7 212 <br /> 02/01/05 18 - - 315 - 02/01/05 <br /> 04/13/05 21 386 04/13/05 <br /> 08/26105 15 - - 521 - 0826(05 <br /> 11/19/05 . 9 - 606. 11/19(05 <br /> 01/17/06 14 _ 665 01/17/06 <br /> 04/17/06 20 - - 755. _ - _ 04/17/06 <br /> 07/07/06 23 - 836- - 07/07/06 <br /> 10/23/06 26 .944 - - 1023f06 <br /> 01/19/07 24 _ - -- 1032 - 01/19/07 <br /> 04/12/07 30 1115- 04/12/07 <br /> 07/23/07 32 - 1217 - - 07/23/07 ` <br /> 10122107 16 - _ 1308 - - 1022/07 <br /> 01/19/08 - 18 - - 1397 01/19/08 <br /> 04/07/08 14 • 1476: - 04/07/08 <br /> 07/03/08 10 - - 1563 - 07/03/08 <br /> 10'28108 38 _ 1680 - - 1028/08 <br /> 01/15/09 7.8 1759 - 01/15/09 - <br /> 07/1909 11 -_ 1940 0711909 - <br /> 01/26/10 22.4 - - 2135. - - - - 01/26/10 - <br /> 07/30/10 33.6 -_ 2320 - 07/30/10 <br /> 01/1! 14.8 <br /> - 2506 02101/1 1 <br /> 09/30/11 120 2747 - 09/30(11 <br /> 03(03/12 59 - 2902. - 03/03/12 " <br /> 55 _ 55 3000 - 0 03/03/12 0- 03(03/12 <br /> 45 - 33 3500._ 500 - 07/16/13 650 12/13113 <br /> 37 20 4000- - 1000 11/28114 1300 09/24/15 <br /> 30` 12 -_ 4500 . 1500 04/11/16 1950 07/05/17 <br /> .-25 - 7 5000 2000 0824/17 2600 04/16/19 <br /> 20 5- 5500 -2500 01/06119 3250 01/25/21 <br /> -17 3 6000 3000 0920120 3900 - 11/06/22 <br /> 14 2 6500 3500 10(02/21 4550 0811724 <br /> 11 1 7000 4000 _ 02/14/23 5200 05/29/26 <br /> 9 `> 1 -. 7500 4500 , 06126124 5650 03/09/28 <br /> Z O - 8000 5000 11/10125 6500 12/19/29 <br /> 6 - 8500 - .- 5500 03/25/27 7150 09/30/31 <br /> 5 - - 9000 6000 OSM28 7800 07/11/33 <br /> 4 - - 9500 6500 12/19129 8450 04/22/35 <br /> 3 10000 7000 0903/31 9100 01/31/37 <br /> 3 - - 10500 - 7500 - 09/14/32 9750 11/12/38 <br /> 2 11000 8000 01/27/34 10400 08/23/40 <br /> 2 11500 .8500 06/11/35 11050. 06/04/42 <br /> 2 - _ 12000 9000 10/23136 11700 0311944 <br /> 1 12500 9500 03(07/38 12350 12/25/45 <br /> 1 13000 10000 07/20'39 13000 10/06/47 <br /> 1 - 13500 10500 12/01/40 13650 07/17/49 <br /> I <br /> 1 - 14000 110110 04/15/42 14300 04/28/51 <br /> 1 14500 11500 0828143 14950 - 02/06/53 <br /> 0 100 <br /> 50 12000 01/09/45- 15600 11/18/54 <br /> (1) Date of Sample Collection. <br /> (2) Reported Concentration of Contaminant of.Concern <br /> (3) Estimated concentration using first order decay function calculated for inter.well MW-3(Figure 2) <br /> 55 x ell-0.0004*(column 6)I <br /> (4) Estimated concentration using first order decay function Calculated for wells MW-1 and MW 6(Figures 5&6) <br /> 55 x ell-0.001'(column 6)) <br /> (5) Time elapsed in days - <br /> (6) Time elapsed in days since the Iasi GWM event on:03/03/12 <br /> (7) Date that corresponds to the days elapsed(columns 5&6) <br /> (8) Apply 30%factor of safety(as approp.basedonR')to days elapsed <br /> (9) Date that corresponds to the days elapsed with factor of safely ' <br /> I <br />