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HomeMy WebLinkAboutDRC-2012-001962 - 0901a0688030adfdState of Utah GARY R HERBERT Governor GREG BELL Lieutenant Governor Department of Environmental Quality Amanda Smith Executive Director DIVISION OF RADIATION CONTROL Dane L Fmerfrock Director 0-2012-001962 MEMORANDUM TO Phil Goble FROM Dean Henderson DATE August 6, 2012 SUBJECT Review ofthe 1'* Quarter 2012 Chloroform Monitonng Report for the Chloroform Contamination Investigation, Denison Mines (USA) Corp (hereafter "DUSA") White Mesa Uranium Mill, near Blanding, Utah The Division of Radiation Control (hereafter "DRC") has reviewed the 1st Quarter Chloroform Monitonng Report (hereafter "Report") for the Chloroform Contamination Investigation For the review of this report the following regulatory enforcement documents were used • DUSA was issued Ground Water Quality Discharge Permit No UGW370004 (hereafter "Permit") on March 8, 2005, last revised on January 20, 2010 • The DUSA Quality Assurance Plan (hereafter "QAP") March 22, 2010 (Revision 6 0) Review The Report appeared to be m compliance with the Permit and QAP However, m Section 1 0 (Introduction) of the Report DUSA refers to the Notice of Violation and Groundwater Corrective Action Order (hereafter "NOV") Docket Number as "UGQ-20-01" This Docket Number is incorrect According to the letter dated August 23,1999 that the Department of Environmental Quality Division of Radiation Control issued to DUSA the correct NOV Docket Number is "UGW-20-01" (DRC 1999) In the closeout letter for this Report DRC will notify DUSA ofthis error and to have the correct NOV Docket Number for all fiiture reporting conceming the chloroform contamination investigation 168 North 1950 West • Salt Lake City, UT Mailing Address P O Box 144850 • Salt Lake City, UT 84114-4850 Telephone (801) 536-4250 • Fax (801) 533-4097 'TDD (801) 536-4414 ivww deq Utah gov Pnnted on 100% recycled paper Page 2 References Denison Mines (USA) Corp , March 22, 2010, White Mesa Uranium Mill, Ground Water Momtonng Quality Assurance Plan (Revision 6 0) Denison Mines (USA) Corp , February 27, 2012, White Mesa Uranium Mill Chloroform Momtonng Report 1^* Quarter (January through March 2012) State of Utah Division of Water Quality Department of Environmental Quality, January 20, 2010, Ground Water Discharge Permit for Denison Mines (USA) Corp at the White Mesa Mill Facility Near Blanding, Utah State of Utah Division of Water Quahty Department of Environmental Quality, August 23, 1999, White Mesa Uranium Mill Notice of Violation and Groimdwater Corrective Action Order, Docket No UGW-20-01 TABLE 1 Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2012 Chloroform Contamination Investigation OUSA White Mesa Mill Well Sampling Event Parameter GWQS Well Sampling Event Carbon Tetrachloride (5 pg/L) Chloride (mg/L) No GWQS Chloroform (70 pg/L) Chloromethane (30 pg/L) Methylene Chloride (Spg/L) Nitrate Nitrate Nitrite (10 mg/L) MW-4 1st Qtr 3/16/05 NA NA 2 900 NA NA 63 2nd Qtr 5/25/05 NA NA 3170 NA NA 7 1 3rd Qtr 8/31/05 <10 NA 3 500 <10 <10 70 4th Qtr 12/7/05 <so 53 3 000 <50 <so 70 1st Qtr 3/9/06 <so 49 3 100 <S0 <so 60 2nd Qtr 6/14/06 <50 49 3 000 <S0 <so 60 3rd Qtr 7/20/06 <50 48 2 820 <S0 <so 1 2 4th Qtr 11/8/06 2 1 50 2 830 1 4 <1 0 64 1st Qtr 2/28/07 1 6 47 2 300 <1 0 <1 0 63 2nd Qtr 6/27/07 1 8 45 2 000 <1 0 <1 0 70 3nd Qtr 8/15/07 1 9 47 2 600 <1 0 <1 0 62 4th Qtr 10/10/07 1 7 45 2 300 <1 0 <1 0 62 1st Qtr 3/28/08 , 1 7 42 2 400 <1 0 <1 0 58 2nd Qtr 6/25/08 1 8 42 2 500 <1 0 <1 0 6 1 3rd Qtr 9/10/08 1 8 35 1 800 <1 0 <1 0 64 4th Qtr 10/15/08 1 7 45 2 100 <1 0 <1 0 59 1st Qtr 3/4/09 1 5 37 2 200 <1 0 <1 0 57 2nd Qtr 6/23/09 1 3 34 1 800 <1 0 <1 0 52 3rd Qtr 9/14/09 1 4 43 2 000 <1 0 <1 0 53 4th Qtr 12/14/09 1 6 44 1 800 <1 0 <1 0 58 1st Qtr 2/17/10 1 2 45 1 600 <1 0 <1 0 4 0 2nd Qtr 6/14/10 1 2 41 2 100 <1 0 <1 0 5 1 3rd Qtr 8/6/10 1 5 38 1 900 <1 0 <1 0 48 4th Qtr 10/15/10 1 4 41 1 500 <1 0 <1 0 49 1st Qtr 2/23/11 1 5 40 1 700 <1 0 <1 0 46 2nd Qtr 6/1/11 1 4 35 1 700 <1 0 <1 0 49 3rd Qtr 8/17/11 1 1 41 1 700 <1 0 <1 0 49 4th Qtr 11/16/11 1 3 40 1 600 <1 0 <1 0 5 1 1st Qtr 1/23/12 1 41 1 500 <1 0 <1 0 48 MW-4A(TW4 A) 1st Qtr 3/16/05 NA NA 3 700 NA NA 7 1 2nd Qtr 5/25/05 NA NA 3 740 NA NA 78 3rd Qtr 8/31/05 <10 NA 3 800 <10 <10 69 4th Qtr 12/7/05 <50 55 3 000 <50 <50 67 1st Qtr 3/9/06 <50 53 3 700 <5<» <S0 58 2nd Qtr 6/14/06 <S0 54 3 300 <50 <S0 73 3nd Qtr 7/20/05 <S0 54 3190 <50 <S0 1 2 4th Qtr 11/8/05 24 54 3 370 <1 0 <1 0 7 1 1st Qtr 2/28/07 1 9 60 2 500 <1 0 <1 0 7 1 Well abandonded MW26(formerTW4-15) 1st Qtr 3/16/05 NA NA 310 NA NA 03 2nd Qtr 5/25/05 NA NA 442 NA NA 02 3rd Qtr 8/31/05 <5 0 NA 960 54 <5 0 02 4th Qtr 12/7/05 <50 55 1 000 <50 <50 03 1st Qtr 3/9/06 <50 52 1 100 <50 <S0 02 2nd Qtr 6/14/06 <50 52 830 <50 <50 02 3rd Qtr 7/20/06 <S0 65 2 170 <50 <S0 1 4 4th Qtr 11/8/06 <1 0 54 282 <1 0 26 03 1st Qtr 2/28/07 <1 0 56 570 <1 0 5 5 06 2nd Qtr 6/27/07 <1 0 49 300 <1 0 13 04 3rd Qtr 8/15/07 <1 0 57 1 400 <1 0 36 1 4th Qtr 10/10/07 <1 0 57 2 000 <1 0 14 06 1st Qtr 3/28/08 <1 0 49 930 <1 0 40 01 2nd Qtr 6/25/08 <1 0 57 1 300 <1 0 53 06 3rd Qtr 9/10/08 <1 0 44 630 <1 0 24 02 4th QU 10/15/08 NA 64 NA NA NA 0 1 4th Qtr 11/18/09 <2 0 NA 1 700 <2 0 100 NA 1st Qtr 3/4/09 <1 0 49 950 <1 0 51 04 2nd Qtr 6/23/09 <1 0 48 410 <1 0 12 02 3rd Qtr 9/14/09 <1 0 46 850 <1 0 30 0 1 4th Qtr 12/14/09 <1 0 60 1 100 <:1 0 40 23 1st Qtr 2/17/10 <1 0 57 730 <1 0 19 0 2 2nd Qtr 6/14/10 1 2 40 1 600 <1 0 <1 0 68 3rd Qtr 8/16/10 <1 0 49 2 200 <1 0 21 06 4th Qtr 10/15/10 <1 0 65 970 <1 0 65 07 1st Qtr 2/23/11 <1 0 57 450 <1 0 36 05 2nd Qtr 5/31/11 <1 0 88 1 800 <1 0 1 3 04 3nd Qtr 8/17/11 <1 0 58 720 <1 0 72 09 4th Qtr 11/16/11 69 20 ">12/5/11 <1 0 1 800 <1 0 29 1st Qtr 2/7/12 98 2 400 <1 0 16 1 7 (1) VOCs were resampled because laboratory missed holding t NA = not analyzed NS = not sampled Shaded indicates concentrations exceeding GWQS Bold and red = highest concentration since montonng started Bold and blue = lowest concentration since montionng started Bold and italics indicates the MDL exceeded the GWQS 1 st Qtr = January March 2nd Qtr = Apnl June 3rd Qtr = July September 4th Qtr = October December TABLE 1 Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2012 Chloroform Contamination Investigation DUSA White Mesa Mill Parameter GWQS Carbon Tetrachloride Chloride Chloroform Chloromethane Methylene Chloride Nitrate Nitrate + Nitrite (mg/L) (5 pg/L) No GWQS (70 ug/L) (30 pg/L) (5 pg/L) (10 mg/L) MW^2 (former TW4-17) 1st Qtr 3/16/05 NA NA <1 0 NA NA <0 1 2nd Qtr 5/25/05 NA NA <1 0 NA NA <0 1 3rd Qtr 8/31/05 <1 0 NA <1 0 32 <1 0 <0 1 4th Qtr 12/7/05 <1 0 33 <1 0 <1 0 <1 0 <0 1 1st Qtr 3/9/06 <1 0 32 <1 0 <1 0 <1 0 <0 1 2nd Qtr 6/14/06 <1 0 30 <:1 0 35 <1 0 <0 1 3rd Qtr 7/20/06 <1 0 32 <1 0 1 8 <1 0 <1 0 4th Qtr 11/8/06 >:1 0 31 <1 0 1 5 <1 0 < 1 1st Qtr 2/28/07 <1 0 32 <1 0 <1 0 <1 0 <1 0 2nd Qtr 6/27/07 <1 0 32 <1 0 <1 0 <1 0 <1 0 3rd Qtr 8/15/07 <1 0 31 <1 0 <1 0 <1 0 <1 0 4th Qtr 10/10/07 <1 0 32 <1 0 <1 0 <1 0 <1 0 1st Qtr 3/28/08 <:1 0 31 <1 0 <1 0 <1 0 < 1 2nd Qtr 6/25/08 <1 0 29 <1 0 <1 0 <:1 0 <1 0 3rd Qtr 9/10/08 <1 0 30 <1 0 <1 0 <1 0 <1 0 4th Qtr 10/15/08 <1 0 26 <1 0 <1 0 <1 0 <0 05 1st Qtr 3/4/09 <1 0 30 <1 0 <1 0 <1 0 < 1 2nd Qtr 6/23/09 <1 0 31 <1 0 <1 0 <1 0 <0 1 3rd Qtr 9/14/09 <1 0 33 <1 0 <1 0 <1 0 <0 1 4th Qtr 12/16/09 <1 0 35 <1 0 <1 0 <1 0 <0 1 1st Qtr 2/17/10 <:1 0 38 <1 0 <1 0 <1 0 <0 1 2nd Qtr 6/14/10 «1 0 32 <1 0 <1 0 <1 0 <0 1 3rd Qtr 8/16/10 <1 0 28 <1 0 <1 0 <1 0 <0 1 4th Qtr 10/15/10 <1 0 24 <1 0 <1 0 <1 0 <0 1 1st Qtr 2/23/11 <1 0 40 <1 0 <1 0 <1 0 <0 1 2nd Qtr 5/25/11 <1 0 31 <1 0 <1 0 <1 0 <0 1 3rd Qtr 8/16/11 ^l 0 33 <1 0 <1 0 <1 0 <0 1 4th Qtr 11/16/11 32 <0 1 <" 12/7/11 <1 0 <1 0 <1 0 <1 0 1st Qtr 1/18/12 <1 0 21 <1 0 <1 0 <1 0 <0 1 TW4-1 1st Qtr 3/16/05 NA NA 2 700 NA NA 9 1 2nd Qtr 5/25/05 NA NA 3 080 NA NA 106 3rd Qtr 8/31/05 <fO NA 2 900 <10 <fO 98 4th Qtr 12/7/05 <50 52 2 400 <50 <50 97 1st Qtr 3/9/06 <50 49 2 700 <50 <50 94 2nd Qtr 6/14/06 <50 48 2.200 <50 <50 96 3rd Qtr 7/20/06 <50 51 2 840 <S0 <50 4th Qtr 11/8/06 1 4 47 2 260 <1 0 <1 0 92 1st Qtr 2/28/07 1 2 47 1 900 <1 0 <1 0 8 9 2nd Qtr 6/27/07 1 4 45 1 900 <1 0 <1 0 9 3rd Qtr 8/15/07 1 3 43 2 300 <1 0 <1 0 84 4th Qtr 10/10/07 1 3 43 2 000 <1 0 <1 0 78 1st Qtr 3/28/08 1 3 39 2 000 <1 0 <1 0 76 2nd Qtr 6/25/08 1 1 39 1 900 <1 0 <1 0 8 68 3rd Qtr 9/10/08 1 3 35 1 700 <1 0 <1 0 8 15 4th Qtr 10/15/08 1 3 41 1 700 <1 0 <1 0 93 1st Qtr 3/11/09 1 1 37 1 700 <1 0 <1 0 75 2nd Qtr 6/23/09 1 37 1 500 <1 0 <1 0 69 3rd Qtr 9/14/09 <1 0 36 1 700 <1 0 <1 0 73 4th Qtr 12/29/09 <1 0 41 1 400 <1 0 <1 0 68 1st Qtr 3/3/10 <1 0 35 1 300 <1 0 <1 0 7 1 2nd Qtr 6/14/10 1 2 40 1 600 <1 0 <1 0 68 3rd Qtr 8/18/10 1 35 1 600 <1 0 <1 0 67 4th Qtr 10/15/10 <1 0 40 1 500 <1 0 <1 0 66 1st Qtr 2/24/11 <1 0 41 1 300 <1 0 <1 0 6 6 2nd Qtr 6/1/11 <1 0 35 1 200 <1 0 <1 0 66 3rd Qtr 8/18/11 <1 0 36 1 300 <1 0 <1 0 68 4th Qtr 11/29/11 <1 0 40 1 500 <1 0 <1 0 66 1st Qtr 1/24/12 <1 0 38 1 300 <1 0 <1 0 68 TW4 2 1st Qtr 3/16/05 NA NA 3 700 NA NA 77 2nd Qtr 5/25/05 NA NA 3 750 NA NA 86 3rd Qtr 8/31/05 <to NA 3 900 <10 <to 80 4th Qtr 12/7/05 <50 56 3 500 <50 <50 78 1st Qtr 3/9/06 <50 56 3 800 <50 <S0 75 2nd Qtr 6/14/06 <50 56 3 200 <S0 <50 7 1 3rd Qtr 7/20/06 <50 54 4120 <S0 <50 74 4th Qtr 11/8/06 23 55 3 420 <1 0 <1 0 76 1st Qtr 2/28/07 1 8 54 2 300 <1 0 <1 0 73 2nd QU 6/27/07 25 50 3 000 <1 0 <1 0 78 3rd QU 8/15/07 22 49 340 <1 0 <1 0 73 4th QU 10/10/07 2 1 51 3 200 <1 0 <1 0 69 IstQU 3/28/08 23 48 3 300 <1 0 <1 0 6 9 2nd QU 6/25/08 22 46 3 100 <1 0 <1 0 74 3rd QU 9/10/08 24 42 2 800 <1 0 <1 0 7 1 4th QU 10/15/08 NA 47 NA NA NA 80 4th QU11/18/09 24 NA 3 200 <2 0 <2 0 NA IstQU 3/11/09 22 46 3 100 <1 0 <1 0 65 2nd QU 6/23/09 2 44 2 800 <1 0 <1 0 64 3rd QU 9/14/09 2 43 3 000 <1 0 <1 0 66 4m QU 12/29/09 2 46 1 6O0 <1 0 <1 0 64 1st QU 3/3/10 2 42 2 600 <1 0 <1 0 68 2nd QU 6/14/10 26 43 3 300 <1 0 «:1 0 87 3rd QU 8/18/10 25 43 3 300 <1 0 <1 0 66 4th QU 10/15/10 2 1 41 3 000 <1 0 <1 0 65 IstQU 2/24/11 24 46 3 100 <1 0 <1 0 7 0 2nd QU 6/2/11 22 42 3 000 <1 0 <1 0 68 3rd QU 8/17/11 1 6 48 2 400 <1 0 <1 0 60 4th QU 11/29/11 28 49 3 900 <1 0 <1 0 70 IstQU 1/24/12 2 49 2 500 <1 0 <1 0 7 1 (1) VOCs were resampled because laboratory missed holding time NA = not analyzed NS = not sampled Shaded indicates concenUations exceeding GWQS Bold and red = highist concenUation since montionng started Bold and blue = lowest concenuation since montionng started Bold and italics indicates the MDL exceeded the GWQS 1 st QU = January March 2nd QU = Apnl June 3rd QU = July September 4th QU = October December TABLE 1 Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2012 Chloroform Contamination Investigation DUSA White Mesa Mill Well Sampling Event Parameter GWQS Carbon Tetrachloride Chloride Chloroform Chloromethane Methylene Chloride Nitrate Nitrate + Nitrite (mg/L) (5 pg/L) No GWQS (70 pg/L) (30 pg/L) (5 pg/L) (10 mg/L) TW4-3 1st QU 3/16/05 NA NA <1 0 NA NA 35 2nd QU 5/25/05 NA NA <1 0 NA NA 37 3rd QU 8/31/05 <1 0 NA <1 0 64 <! 0 35 4tti QU 12/7/05 <1 0 26 <1 0 <1 0 <1 0 33 IstQU 3/9/06 <1 0 26 <1 0 23 <1 0 33 2nd QU 6/14/06 <1 0 26 <1 0 1 6 <1 0 7 1 3rd QU 7/20/06 <1 0 26 <1 0 22 <1 0 29 4th QU 11/8/06 <1 0 23 <1 0 <1 0 <1 0 1 5 IstQU 2/28/07 <1 0 22 <1 0 <1 0 <1 0 3 1 2nd QU 6/27/07 <1 0 23 <1 0 <^ 0 <1 0 33 3rd QU 8/15/07 <1 0 24 <1 0 <1 0 <1 0 31 4th QU 10/10/07 <1 0 27 <1 0 <1 0 <1 0 28 IstQU 3/28/08 <1 0 21 <1 0 <1 0 <1 0 28 2nd QU 6/25/08 <1 0 19 <1 0 «:1 0 <1 0 29 3rd QU 9/10/08 <1 0 19 <^ 0 <1 0 <1 0 27 4th QU 10/15/08 <1 0 22 <^ 0 <1 0 <1 0 26 IstQU 3/4/09 <1 0 21 <i 0 <1 0 <1 0 25 2nd QU 6/23/09 <1 0 20 <i 0 <1 0 <1 0 29 3rd QU 9/14/09 <1 0 21 <:1 0 <1 0 <1 0 28 4th QU 12/29/09 <1 0 22 <i 0 <1 0 <1 0 26 IstQU 2/23/10 <1 0 23 <i 0 <1 0 <1 0 28 2nd QU 6/14/10 <1 0 24 <i 0 <1 0 <1 0 30 3rd QU 8/10/10 <1 0 22 <:1 0 <1 0 <1 0 3 1 4th QU 10/15/10 <1 0 26 <1 0 <1 0 <1 0 33 IstQU 2/15/11 <1 0 23 <1 0 <1 0 <1 0 35 2nd QU 5/25/11 <1 0 23 <1 0 <1 0 <1 0 37 3rd QU 8/16/11 <1 0 23 <1 0 <1 0 <1 0 40 4tti QU11/14/11 <1 0 23 <1 0 <1 0 <1 0 44 1st QU 1/17/12 <1 0 21 <1 0 <1 0 <1 0 7 1 TW4-4 1st QU 3/16/05 NA NA 3 100 NA NA 100 2nd QU 5/25/05 NA NA 2 400 NA NA 11 3 3rd QU 8/31/05 <10 NA 3 200 <10 <fO 99 4th QU 12/7/05 <so 54 2 800 <so <50 102 1st QU 3/9/06 <50 51 2 900 <50 <50 95 2nd QU 6/14/06 <50 48 2 600 <50 <so 86 3rd QU 7/20/06 <50 50 2 850 <50 <so 97 4Ui QU 11/8/06 1 7 49 2 670 <1 0 <1 0 10 1 1st QU 2/28/07 1 5 49 2 200 <:1 0 <1 0 9 0 2nd QU 6/27/07 1 7 47 2 400 <1 0 <1 0 94 3rd QU 8/15/07 1 5 45 2 700 <1 0 <1 0 95 4th Qtr 10/10/07 1 5 47 2 500 <1 0 <1 0 95 1st QU 3/28/08 1 6 43 2 800 <1 0 <1 0 9 2 2nd QU 6/25/08 1 5 42 2 500 <1 0 <1 0 108 3rd QU 9/10/08 1 4 39 2 200 <1 0 <1 0 88 4Ui QU 10/15/08 NA 44 NA NA NA 10 1 4th QU11/18/09 <2 0 NA 2 500 <2 0 <2 0 NA 1st QU 3/4/09 1 2 37 2.200 <1 0 <1 0 10 2 2nd Qtr 6/23/09 1 2 34 1 800 <1 0 <1 0 82 3rd QU 9/14/09 1 1 39 2 000 <1 0 <1 0 84 4th QU 12/29/09 1 1 41 950 <1 0 <1 0 76 IstQU 2/17/10 1 48 1 700 <1 0 <1 0 6 6 2nd QU 6/14/10 1 2 35 1 700 <1 0 <1 0 76 3rd QU 8/10/10 1 3 36 2 100 <1 0 <1 0 73 4th QU 10/15/10 1 3 38 1 700 <1 0 <1 0 7 1 1st QU 2/23/11 1 4 41 1 800 <1 0 <1 0 7 0 2nd QU 6/1/11 1 2 35 1 700 <1 0 <1 0 70 3rd QU 8/17/11 <1 0 40 1 500 <1 0 <1 0 66 4th QU 11/16/11 1 39 1 500 <1 0 <1 0 70 IstQU 1/23/12 <1 0 38 1 200 <1 0 <1 0 7 1 TW4-5 IstQU 3/16/05 NA NA 120 NA NA 49 2nd QU 5/25/05 NA NA 113 NA NA 37 3rd QU 8/31/05 <2 5 NA 82 58 <2 5 60 4th QU 12/7/05 <2 5 56 63 25 <2 5 60 IstQU 3/9/06 <2 5 52 66 3 1 <2 5 60 2nd QU 6/14/06 <2 5 51 51 3 1 <2 5 59 3rd QU 7/20/06 <1 0 54 53 7 <1 0 <1 0 67 4tti QU11/8/06 <1 0 55 47 1 <1 0 <1 0 29 IstQU 2/28/07 <1 0 57 35 <1 0 <1 0 78 2nd QU 6/27/07 <1 0 45 26 <1 0 <1 0 70 3rd QU 8/15/07 <1 0 38 92 <1 0 <1 0 77 4ttiQU 10/10/07 <1 0 39 94 <1 0 <1 0 82 IstQU 3/28/08 <1 0 36 11 <1 0 <1 0 74 2nd QU 6/25/08 <1 0 37 93 <1 0 <1 0 87 3rd QU 9/10/08 <1 0 34 11 <1 0 <1 0 79 4th QU 10/15/08 <1 0 37 10 <1 0 <1 0 93 1st QU 3/4/09 <1 0 34 12 <1 0 <1 0 79 2nd QU 6/23/09 <1 0 37 13 <1 0 <1 0 75 3rd QU 9/14/09 <1 0 48 12 <1 0 <1 0 83 4tti QU 12/29/09 <1 0 41 85 <1 0 <1 0 75 1st QU 2/25/10 <1 0 43 13 <1 0 <1 0 68 2nd QU 6/14/10 <1 0 28 12 <1 0 <1 0 7 1 3rd QU 8/11/10 <1 0 38 12 <1 0 <1 0 70 4th QU 10/15/10 <1 0 41 11 <1 0 <1 0 72 1st QU 2/22/11 <1 0 34 10 <1 0 <1 0 70 2nd QU 5/26/11 <1 0 35 9 <1 0 <1 0 72 3rd QU 8/7/11 <1 0 37 10 <1 0 <1 0 75 4th QU11/16/11 30 60 12/7/11 <1 0 79 <1 0 <1 0 1st QUI/18/12 <1 0 22 76 <1 0 <1 0 58 NA = not analyzed NS = not sampled Bold and red = highist concenUation since montionng started Bold and blue = lowest concenUation since montionng started Shaded indicates concenUations exceeding GWQS Bold and italics indicates the MDL exceeded Uie GWQS 1 st QU = January March 2nd QU = Apnl June 3rd QU = July September 4th QU = October December TABLE 1 Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2012 Chloroform Contamination Investigation DUSA White Mesa Mill Well Sampling Event Parameter GWQS Carbon Tetrachloride Chloride Chloroform Chloromethane Methylene Chloride Nitrate Nitrate + Nitrite (mg/L) (5 pg/L) ;NO GWQS (70 pg/L) (30 pg/L) (5 pg/L) (10 mg/L) TW4-6 1st QU 3/16/05 NA NA <1 0 NA NA 02 2nd QU 5/25/05 NA NA 25 NA NA 04 3rd QU 8/31/05 <1 0 NA 10 26 <1 0 08 4th QU 12/7/05 <1 0 32 17 1 3 <1 0 09 1st QU 3/9/06 <1 0 31 31 <1 0 <1 0 1 2 2nd QU 6/14/06 <1 0 30 19 <1 0 <1 0 1 0 3rd QU 7/20/06 <1 0 37 11 <1 0 <1 0 06 4th QU 11/8/06 <1 0 65 42 8 <1 0 <1 0 1 4 1st QU 2/28/07 <1 0 32 46 <1 0 <1 0 1 8 2nd QU 6/27/07 <1 0 38 11 <1 0 <1 0 06 3rd QU 8/15/07 <1 0 36 18 <1 0 <1 0 07 4th QU 10/10/07 <1 0 35 18 <1 0 <1 0 08 1st QU 3/28/08 <1 0 33 52 <1 0 <1 0 1 1 2nd QU 6/25/08 <^ 0 35 24 «1 0 <1 0 09 3rd QU 9/10/08 <1 0 35 39 <1 0 <1 0 1 1 4m QU 10/15/08 <1 0 33 37 <1 0 <1 0 1 0 1st QU 3/11/09 <1 0 35 "81 <1 0 <1 0 22 2nd QU 6/23/09 <1 0 37 120 <1 0 <1 0 27 3rd QU 9/14/09 <1 0 37 280 <1 0 <1 0 50 4m QU 12/29/09 <1 0 41 250 <1 0 <1 0 6 1 1st QU 2/25/10 <1 0 45 1000 <1 0 <1 0 1 8 2nd QU 6/14/10 <1 0 33 590 <1 0 <1 0 25 3rd QU 8/11/10 <1 0 31 630 <1 0 <1 0 39 4m QU 10/15/10 <1 0 41 420 <1 0 <1 0 43 1st QU 2/23/11 <1 0 40 47 <1 0 <1 0 0 7 2nd QU 5/26/11 <1 0 42 96 <1 0 <1 0 03 3rd QU 8/17/11 <1 0 39 16 <1 0 <1 0 03 4m QU11/16/11 36 08 12/7/11 <1 0 21 <1 0 <1 0 '"11/16/11 <1 0 33 50 <1 0 <1 0 08 1st QUI/18/12 <1 0 38 38 <1 0 <1 0 07 TW4-7 IstQU 3/16/05 NA NA 3 100 NA NA 52 2nd QU 5/25/05 NA NA 2 700 NA NA 54 3rd QU 8/31/05 <fO NA 3 100 <10 <10 52 4m QU 12/7/05 <so 52 2 500 <50 <50 53 IstQU 3/9/06 <50 48 1 900 <50 <50 1 2nd QU 6/14/06 <50 47 2 200 <50 <50 45 3rd QU 7/20/06 <so 51 2 140 <50 <S0 47 4m QU11/8/06 1 5 49 2 160 <1 0 <1 0 46 1st QU 2/28/07 1 1 47 1 830 <1 0 <1 0 6 2nd QU 6/27/07 1 5 45 2 600 <1 0 <1 0 5 1 3rd QU 8/15/07 1 4 44 2 300 <1 0 <1 0 47 4m QU 10/10/07 1 2 45 1 900 <1 0 <1 0 47 IstQU 3/28/08 1 3 43 2 200 <1 0 <1 0 4 2 2nd QU 6/25/08 1 3 43 1 800 <1 0 <1 0 48 3rd QU 9/10/08 1 4 35 1 600 <1 0 <1 0 4 16 4m QU 10/15/08 NA 40 NA NA NA 4 01 4m QU11/18/09 <2 0 NA 2 500 <2 0 <2 0 NA IstQU 3/11/09 1 2 35 1 800 <1 0 <1 0 3 7 2nd QU 6/23/09 <1 0 37 1 400 <1 0 <1 0 38 3rd QU 9/14/09 1 37 1 500 <1 0 <1 0 4 1 4m QU 12/29/09 <1 0 37 1 300 <1 0 <1 0 42 IstQU 3/3/10 <1 0 35 1 200 <1 0 <1 0 3 8 2nd QU 6/14/10 <:1 0 31 1 100 <1 0 <1 0 39 3rd QU 8/11/10 1 36 1 500 <1 0 <1 0 39 4m QU 10/15/10 <1 0 38 1 100 <1 0 <1 0 4 IstQU 2/23/11 <1 0 45 1 300 <1 0 <1 0 3 6 2nd QU 6/1/11 <1 0 35 1 200 <1 0 <1 0 40 3rd QU 8/18/11 <1 0 37 1 200 <1 0 <1 0 4 1 4m QU 11/29/11 <1 0 37 1 000 <1 0 <1 0 38 IstQU 1/19/12 <1 0 37 1 000 <1 0 <1 0 3 9 TW4-8 IstQU 3/16/05 NA NA 10 NA NA <0 1 2nd QU 5/25/05 NA NA <1 0 NA NA 02 3rd QU 8/31/05 <1 0 NA 1 1 1 7 NA <1 0 4m QU 12/7/05 <1 0 41 «1 0 <1 0 <1 0 <:1 0 IstQU 3/9/06 <1 0 39 1 3 2 1 <1 0 03 2nd QU 6/14/06 <1 0 37 1 8 1 0 <1 0 <1 0 3rd QU 7/20/06 <1 0 39 <1 0 <1 0 <1 0 0 1 4m QU 11/8/06 <1 0 40 <1 0 <1 0 <1 0 < 1 IstQU 2/28/07 <1 0 39 25 <1 0 <1 0 07 2nd QU 6/27/07 <1 0 42 25 <1 0 <1 0 02 3rd QU 8/15/07 <1 0 42 1 5 <1 0 <1 0 <1 0 4m QU 10/10/07 <1 0 43 35 <1 0 <1 0 05 IstQU 3/28/08 <1 0 46 <1 0 <1 0 <1 0 0 1 2nd Qu 6/25/08 <1 0 45 <1 0 <1 0 <1 0 <1 0 3rd Qu 9/10/08 <1 0 39 <1 0 <1 0 <1 0 <0 05 4m Qu 10/15/08 <1 0 44 <1 0 <1 0 <1 0 <0 05 IstQU 3/4/09 <1 0 42 <1 0 <1 0 <1 0 <0 1 2nd QU 6/23/09 <1 0 44 <1 0 <1 0 <1 0 <0 1 3rd QU 9/14/09 <1 0 44 <1 0 <1 0 <1 0 <0 1 4m QU 12/17/09 <1 0 51 <1 0 <1 0 <1 0 <01 IstQU 2/24/10 <1 0 57 <1 0 <1 0 <1 0 <01 2nd QU 6/14/10 <1 0 42 <1 0 <1 0 <1 0 <0 1 3rd QU 8/18/10 <1 0 45 <1 0 <1 0 <1 0 <0 1 4m QU 10/15/10 <1 0 46 <1 0 <1 0 <1 0 0 1 1st QU 2/16/11 <:1 0 52 <1 0 <:1 0 <1 0 <0 1 2nd QU 5/25/11 «:1 0 45 <1 0 <1 0 <1 0 0 1 3rd QU 8/16/11 <1 0 46 <1 0 <1 0 <1 0 0 1 4th QU11/16/11 45 02 '"12/7/11 <1 0 <^ 0 <1 0 <1 0 1st QU 1/18/12 <1 0 45 <1 0 <1 0 <1 0 03 (1) VOCs were resampled because laboratory missed holding time (2) Results of me TW4 70 me duplicate sample for TW4-6 NA = not analyzed NS = not sampled Shaded indicates concenUations exceeding GWQS Bold and red = highest concenUation since montionng started Bold and blue = lowest concenUaUon since montionng started Bold and italics indicates the MDL exceeded me GWQS 1st QU = January March 2nd QU = Apnl June 3nJ QU = July September 4th QU = October December TABLE 1 Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2012 Chloroform Contamination Investigation DUSA White Mesa Mill Well Parameter Sampling Event GWQS Carbon Tetrachloride Chloride Chloroform Chloromethane Methylene Chloride Nitrate Nitrate + Nitrite (mg/L) (5 pg/L) No GWQS (70 pg/L) (30 pgn.) (5 pg/L) (10 mg/L) TW4-9 IstQU 3/16/05 NA NA 38 NA NA 1 3 2nd QU 5/25/05 NA NA 1 2 NA NA 1 3 3rd QU 8/31/05 <1 0 NA <1 0 29 <1 0 1 3 4th QU 12/7/05 <1 0 42 <1 0 <1 0 <1 0 1 3 1st QU 3/9/06 <1 0 38 <1 0 2 6 <1 0 1 5 2nd QU 6/14/06 <1 0 39 19 27 <1 0 1 5 3rd QU 7/20/06 <1 0 41 <1 0 <1 0 <1 0 09 4m QU11/8/06 <1 0 44 <1 0 <1 0 <1 0 07 IstQU 2/28/07 <1 0 44 <1 0 <1 0 <1 0 06 2nd QU 6/27/07 <1 0 42 21 <1 0 <1 0 1 3 3rd QU 8/15/07 <1 0 38 95 <1 0 <1 0 1 8 4m QU 10/10/07 <1 0 40 87 <1 0 <1 0 2 1st QU 3/28/08 <1 0 35 1 3 <1 0 <1 0 2 1 2nd QU 6/25/08 <1 0 35 1 <1 0 <1 0 23 3rd QU 9/10/08 <1 0 28 <1 0 <1 0 <1 0 2 79 4m QU 10/15/08 <1 0 58 <1 0 <1 0 «:1 0 1 99 IstQU 3/4/09 <1 0 30 <1 0 <1 0 <1 0 25 2nd QU 6/23/09 <1 0 30 <1 0 <1 0 <1 0 23 3rd QU 9/14/09 <1 0 30 <1 0 <1 0 <1 0 25 4m QU 12/17/09 <1 0 37 <1 0 <1 0 <1 0 1 7 IstQU 2/23/10 tl 0 47 <1 0 <1 0 <1 0 1 4 2nd QU 6/14/10 <1 0 33 <1 0 <1 0 <1 0 1 5 3rd QU 8/13/10 <1 0 40 <1 0 <1 0 <1 0 1 2 4m QU 10/15/10 <1 0 34 <1 0 <1 0 <1 0 1 8 IstQU 2/17/11 <1 0 41 <1 0 <1 0 <1 0 1 3 2nd QU 5/25/11 <1 0 38 <1 0 <1 0 <1 0 34 3rd QU 8/16/11 <1 0 21 <1 0 <1 0 <1 0 4 4m QU11/16/11 38 23 (1) 12/7/11 <:1 0 <1 0 <^ 0 <1 0 1st QU 1/18/12 <1 0 28 <1 0 <1 0 <1 0 23 TW4-10 IstQU 3/16/05 NA NA 140 NA NA 1 6 2nd QU 5/25/05 NA NA 62 4 NA NA 08 3rd QU 8/31/05 <2 5 NA 110 62 <2 5 1 1 4m QU 12/7/05 <2 5 52 300 <2 5 <2 5 33 1st QU 3/9/06 <5 0 50 190 <5 0 <5 0 24 2nd QU 6/14/06 <5 0 54 300 <5 0 <5 0 35 3rd QU 7/20/06 <5 0 61 504 <5 0 <5 0 68 4m QU11/8/06 <1 0 58 462 1 6 <1 0 57 IstQU 2/28/07 <1 0 2 500 <1 0 <1 0 73 2nd QU 6/27/07 <1 0 54 350 <1 0 <1 0 5 1 3rd QU 8/15/07 <1 0 59 660 <1 0 <1 0 73 4m QU 10/10/07 <1 0 59 470 <1 0 <1 0 67 IstQU 3/28/08 <1 0 55 620 <1 0 <1 0 73 2nd QU 6/25/08 <1 0 58 720 <1 0 <1 0 99 3rd QU 9/10/08 <1 0 51 660 <1 0 <1 0 9 23 4th QU 10/15/08 NA 61 NA NA NA 105 4m QU 11/18/09 <:2 0 NA 1 200 <2 0 <2 0 NA 1st QU 3/11/09 <1 0 64 1 100 <1 0 <1 0 11 6 2nd QU 6/23/09 <1 0 62 1 200 <1 0 <1 0 98 3rd QU 9/14/09 <1 0 51 910 <1 0 <1 0 8 1 4m QU 12/22/09 <1 0 51 300 «:1 0 <1 0 38 IstQU 3/3/10 <1 0 48 460 <1 0 <1 0 50 2nd QU 6/14/10 <1 0 42 220 <1 0 «:1 0 1 6 3rd QU 8/12/10 <1 0 38 100 <1 0 <:1 0 08 4m QU 10/15/10 <1 0 52 1100 <1 0 <1 0 11 0 IstQU 2/23/11 <1 0 32 620 <1 0 <1 0 90 2nd QU 6/14/11 <1 0 42 280 <1 0 <1 0 33 3rd QU 8/17/11 <1 0 41 180 <1 0 <1 0 1 9 4th QU11/16/11 <1 0 45 110 <1 0 <^ 0 1 1 IstQU 1/19/12 <1 0 40 76 <1 0 <^ 0 09 TW4-11 1st QU 3/16/05 NA NA 4 400 NA NA 87 2nd Qtr 5/25/05 NA NA 3 590 NA NA 103 3rd QU 8/31/05 <10 NA 4 400 <10 <10 94 4m QU 12/7/05 <100 58 4 400 <100 <100 94 1st QU 3/9/06 <so 56 4"400 <50 <so 92 2nd QU 6/14/06 <50 56 4 300 <S0 <50 100 3rd QU 7/20/06 <50 55 4 080 <S0 <S0 100 4m QU11/8/06 1 7 55 3 660 27 1 3 10 0 IstQU 2/28/07 1 3 54 3 600 <1 0 1 6 ~io"i 2nd QU 6/27/07 1 6 53 3 800 <1 0 <1 0 106 3rd QU 8/15/07 1 7 53 4 500 <1 0 <1 0 102 4th QU 10/10/07 1 6 53 4 400 <1 0 1 2 98 IstQU 3/28/08 <1 0 63 340 <1 0 <1 0 77 2nd QU 6/25/08 <1 0 46 640 <1 0 <1 0 73 3rd QU 9/10/08 <1 0 42 900 <1 0 <1 0 79 4m QU 10/15/08 NA 47 NA NA NA 95 4th QU11/18/09 <2 0 NA 1 000 <2 0 <2 0 NA 1st QU 3/11/09 <1 0 49 1 000 <1 0 «:1 0 73 2nd QU 6/23/09 <1 0 44 980 <1 0 «:1 0 68 3rd QU 9/14/09 <1 0 49 1 000 <1 0 <1 0 70 4m QU 12/29/09 <1 0 46 860 <1 0 <1 0 66 IstQU 3/3/10 <1 0 42 820 «:1 0 <1 0 68 2nd QU 6/14/10 <1 0 40 820 <1 0 <1 0 69 3rd QU 8/12/10 <1 0 43 800 <1 0 <1 0 67 4m QU 10/15/10 <1 0 49 720 <1 0 <1 0 64 IstQU 2/23/11 <1 0 46 1 000 <1 0 <1 0 65 2nd QU 6/1/II <1 0 49 930 <1 0 <1 0 73 3rd QU 8/17/11 <1 0 48 820 <1 0 <:1 0 7 1 4th QU11/16/11 <1 0 46 1500 0 <1 0 7 1 1st QU 1/24/12 <1 0 43 610 <1 0 <1 0 68 (1) VOCs vi«re resampled because laboratory missed holding ume NA = not analyzed NS = not sampled Shaded indicates concentrations exceeding GWQS Bold and red = highest concenuaton since montionng started Bold and blue = lowest concenUaUon since montionng started Bold and italics indicates me MDL exceeded me GWQS 1st Qu = January March 2nd Qu = Apnl June 3rd QU = July September 4m Qu = October December TABLE 1 Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2012 Chloroform Contamination Investigation OUSA White Mesa Mill Well Sampling Event Parameter GWQS Carbon Tetrachloride (5 pg/L) Chloride (mg/L) No GWQS Chloroform (70 pg/L) Chloromethane (30 pg/L) Methylene Chloride (5 pg/L) Nitrate Nitrate + Nitrite (10 mg/L) NA NA <1 0 NA NA 1 4 NA NA <1 0 NA NA 1 6 <1 0 NA <1 0 58 <1 0 1 5 <1 0 19 <1 0 1 0 <1 0 1 4 <1 0 19 <1 0 26 <1 0 1 3 <1 0 16 <1 0 1 4 <1 0 1 4 <1 0 16 <1 0 1 4 <1 0 1 4 <1 0 16 <1 0 <1 0 <1 0 1 4 <1 0 16 <1 0 <1 0 <1 0 1 5 <1 0 18 <:1 0 <1 0 <1 0 1 5 <1 0 29 <1 0 <1 0 <1 0 1 4 <1 0 16 «1 0 <1 0 <1 0 1 4 <1 0 16 <1 0 <1 0 <1 0 1 6 <1 0 19 <1 0 <1 0 <1 0 27 <1 0 18 <1 0 <1 0 <1 0 27 <1 0 22 <1 0 <1 0 <1 0 25 <1 0 23 <1 0 <1 0 <1 0 24 <1 0 22 <1 0 <1 0 <1 0 38 <1 0 22 <1 0 <1 0 <1 0 5 1 <1 0 23 <:1 0 <1 0 <1 0 36 «:1 0 22 <1 0 <1 0 <1 0 40 <1 0 29 <1 0 <1 0 <1 0 11 0 <1 0 35 <:1 0 <1 0 <1 0 90 <1 0 31 <1 0 <1 0 <1 0 80 <1 0 31 <1 0 <1 0 <1 0 65 <1 0 32 <1 0 <1 0 <1 0 7 <1 0 31 <1 0 <1 0 <1 0 68 <1 0 30 <1 0 <1 0 <1 0 80 <1 0 28 <1 0 <1 0 <1 0 7 7 NA NA <1 0 NA NA 42 NA NA <1 0 NA NA 43 <1 0 NA <1 0 3 1 <1 0 46 <1 0 69 <1 0 <1 0 <1 0 43 <1 0 67 <1 0 1 7 <1 0 4 2 <1 0 66 <1 0 1 4 <1 0 49 <1 0 65 <1 0 <1 0 <1 0 43 <1 0 33 <1 0 <1 0 <1 0 06 <1 0 59 <1 0 <1 0 <1 0 40 <1 0 59 <1 0 <1 0 <1 0 46 <1 0 58 <1 0 <1 0 <1 0 44 <1 0 58 <1 0 <1 0 <1 0 4 1 <1 0 54 <1 0 <1 0 <1 0 38 <1 0 58 <1 0 <1 0 <1 0 42 <1 0 50 <1 0 <1 0 <1 0 43 <1 0 58 <1 0 <1 0 <1 0 46 <1 0 58 «:1 0 <1 0 <1 0 37 <1 0 57 «:1 0 <1 0 <1 0 1 2 <1 0 63 <1 0 <1 0 <1 0 47 <1 0 60 <1 0 <^ 0 <1 0 4 1 <1 0 53 <1 0 <1 0 <1 0 43 <1 0 53 <1 0 <1 0 <1 0 52 <1 0 55 <1 0 <1 0 <1 0 56 <1 0 55 <1 0 <1 0 <1 0 58 <1 0 60 <1 0 <1 0 <1 0 55 <1 0 56 <1 0 <1 0 <1 0 64 <1 0 60 <1 0 <1 0 <1 0 52 <1 0 54 <1 0 <1 0 <1 0 59 <1 0 55 <1 0 <1 0 <1 0 5 5 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS <1 0 37 NS <1 0 <1 0 24 <1 0 38 <1 0 <1 0 <1 0 23 <1 0 38 <1 0 <1 0 <1 0 1 4 <1 0 36 <1 0 <1 0 <1 0 1 1 <^ 0 38 <1 0 <1 0 <1 0 08 <1 0 57 <1 0 <1 0 <1 0 04 <1 0 35 <1 0 <1 0 <1 0 1 6 <1 0 34 <1 0 <1 0 <1 0 1 38 <1 0 40 <1 0 <1 0 <1 0 0 76 <1 0 35 <1 0 <1 0 <1 0 1 6 <1 0 36 <1 0 <1 0 <1 0 1 4 <1 0 38 <1 0 <1 0 <1 0 1 5 <1 0 34 <1 0 <1 0 <1 0 1 4 <1 0 33 <1 0 <^ 0 <1 0 25 •cl 0 49 <1 0 <1 0 <1 0 29 <1 0 35 <1 0 <1 0 <1 0 28 <1 0 29 <1 0 <1 0 <1 0 29 <1 0 25 <1 0 <1 0 <1 0 1 8 <1 0 24 <1 0 <1 0 <1 0 1 4 <1 0 33 <1 0 <1 0 <1 0 26 <1 0 15 <1 0 <1 0 <1 0 1 7 <1 0 20 <1 0 <1 0 <1 0 1 9 TW4 12 IstQU 3/16/05 2nd QU 5/25/05 3rd QU 8/31/05 4m QU 12/7/05 IstQU 3/9/06 2nd QU 6/14/06 3rd QU 7/20/06 4m QU 11/8/06 IstQU 2/28/07 2nd QU 6/27/07 3rd QU 8/15/07 4m QU 10/10/07 IstQU 3/28/08 2nd QU 6/25/08 3rd QU 9/10/08 4m QU 10/15/08 IstQU 3/11/09 2nd QU 6/23/09 3rd QU 9/14/09 4m QU 12/16/09 IstQU 2/23/10 2nd QU 6/14/10 3rd QU 8/10/10 4m QU 10/15/10 IstQU 2/15/11 2nd QU 5/25/11 3rd QU 8/16/11 4m QU 11/15/11 IstQU 1/17/12 TW4-13 IstQU 3/16/05 2nd Qtr 5/25/05 3rd QU 8/31/05 4m QU 12/7/05 1st QU 3/9/06 2nd QU 6/14/06 3rd QU 7/20/06 4th Qui 1/8/06 IstQU 2/28/07 2nd QU 6/27/07 3rd QU 8/15/07 4m QU 10/10/07 IstQu 3/28/08 2nd QU 6/25/08 3rd QU 9/10/08 4m QU 10/15/08 IstQU 3/4/09 2nd QU 6/23/09 3rd QU 9/14/09 4m QU 12/16/09 IstQU 2/24/10 2nd QU 6/14/10 3rd QU 8/10/10 4m QU 10/15/10 1st QU 2/15/11 2nd QU 5/25/11 3rd QU 8/16/11 4m QU11/15/11 IstQU 1/17/12 TW4-14 IstQU 3/16/05 2nd QU 5/25/05 3rd QU 8/31/05 4m QU 12/7/05 1st QU 3/9/06 2nd QU 6/14/06 3rd QU 7/20/06 4th QU11/8/06 1st QU 2/28/07 2nd QU 6/27/07 3rd QU 8/15/07 4m QU 10/10/07 1st QU 3/28/08 2nd QU 6/25/08 3rd QU 9/10/08 4m QU 10/15/08 IstQU 3/4/09 2nd QU 6/23/09 3rd QU 9/14/09 4m QU 12/16/09 IstQU 3/3/10 2nd QU 6/14/10 3rd QU 8/10/10 4m QU 10/15/10 IstQU 2/15/11 2nd QU 6/14/11 3rd QU 8/16/11 4m QU11/15/11 IstQU 1/17/12 NA = not analyzed NS = not sampled Shaded indicates concenUations exceeding GWQS Bold and italics indicates me MDL exceeded me GWQS 1st QU = January March 2nd QU = Apnl June 3rd QU = July September 4m QU = October December TABLE 1 Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2012 Chloroform Contamination Investigation DUSA White Mesa Mill Well Parameter Sampling Event GWQS Carbon Tetrachloride Chloride Chloroform Chloromethane Methylene Chloride Nitrate Nitrate + Nitrite (mg/L) (5 pg/L) No GWQS (70 pg/L) (30 pg/L) (5 pg/L) (10 mg/L) TW4 16 IstQU 3/16/05 NA NA 240 NA NA <0 1 2nd QU 5/25/05 NA NA 212 NA NA <0 1 3rd QU 8/31/05 <1 0 NA 85 32 43 <0 1 4th QU 12/7/05 <1 0 64 14 26 59 1 4 IstQU 3/9/06 <1 0 60 39 1 1 21 3 2nd QU 6/14/06 <1 0 55 13 24 89 1 9 3rd QU 7/20/06 <1 0 60 52 <1 0 27 27 4m QU 11/8/06 <1 0 62 136 <1 0 92 56 IstQU 2/28/07 <1 0 79 87 <1 0 66 ""12"3 2nd QU 6/27/07 <1 0 75 26 <1 0 1 8 99 3rd QU 8/15/07 <1 0 65 7 1 <1 0 51 54 4m QU 10/10/07 <1 0 69 1 4 <1 0 1 44 1st QU 3/28/08 <1 0 52 11 <1 0 "26 <0 1 2nd QU 6/25/08 <1 0 58 <1 0 <1 0 <1 0 1 5 3rd QU 9/10/08 <1 0 71 10 <1 0 14 105 4th QU 10/15/08 <1 0 89 39 <1 0 66 98 1st QU 3/4/09 <1 0 73 <:1 0 <1 0 <1 0 96 2nd QU 6/23/09 <1 0 76 <1 0 <1 0 <1 0 89 3rd QU 9/14/09 <1 0 79 <1 0 <1 0 <1 0 88 4m QU 12/17/09 <1 0 76 <1 0 <1 0 <1 0 52 IstQU 2/24/10 <1 0 77 <1 0 <^ 0 <1 0 42 2nd QU 6/14/10 <1 0 64 2 1 <1 0 <1 0 47 3rd QU 8/24/10 <1 0 72 43 «:1 0 <1 0 46 4th QU 10/15/10 <1 0 71 3 <1 0 <1 0 33 IstQU 2/22/11 <1 0 86 15 <1 0 <1 0 7 2nd QU 5/26/11 <1 0 81 16 <1 0 <1 0 5 3rd QU 8/17/11 <1 0 63 92 <1 0 <1 0 1 7 4m QU 11/16/11 38 04 '" 12/7/11 <1 0 <1 0 <1 0 1 4 1st QUI/18/12 <1 0 48 <1 0 <1 0 1 7 0 1 TW4-18 IstQU 3/16/05 NA NA 38 NA NA 14 1 2nd QU 5/25/05 NA NA 29 8 NA NA 12 9 3rd QU 8/31/05 <1 0 NA 39 28 <1 0 133 4m QU 12/7/05 <1 0 41 14 1 1 <1 0 73 1st QU 3/9/06 <1 0 36 12 1 6 <1 0 5 9 2nd QU 6/14/06 <1 0 35 12 27 <1 0 47 3rd QU 7/20/06 <1 0 35 108 <1 0 <1 0 6 1 4m QU 11/8/06 <1 0 34 12 5 <1 0 <1 0 57 IstQU 2/28/07 <1 0 30 92 <1 0 <1 0 51 2nd QU 6/27/07 <1 0 28 8 <1 0 <1 0 49 3rd QU 8/15/07 <1 0 32 89 <1 0 <1 0 50 4m QU 10/10/07 <1 0 27 74 <1 0 <1 0 44 1st QU 3/28/08 <1 0 23 64 <1 0 <1 0 07 2nd Qtr 6/25/08 <1 0 23 57 <1 0 <1 0 46 3rd QU 9/10/08 <1 0 26 8 <1 0 <1 0 49 4m QU 10/15/08 <1 0 30 94 <1 0 <1 0 52 1st QU 3/4/09 <1 0 29 11 <1 0 <1 0 52 2nd QU 6/23/09 <1 0 30 16 <1 0 <1 0 62 3rd QU 9/14/09 <1 0 26 13 <1 0 <1 0 59 4m QU 12/22/09 <1 0 30 82 <1 0 <1 0 54 1st QU 2/24/10 <1 0 41 69 <1 0 <1 0 5 1 2nd QU 6/14/10 <1 0 35 29 <1 0 <1 0 90 3rd QU 8/12/10 <1 0 37 29 <1 0 <1 0 90 4m QU 10/15/10 <1 0 50 30 <1 0 <1 0 100 1st QU 2/22/11 <1 0 52 39 <1 0 <1 0 100 2nd QU 5/26/11 <1 0 36 26 <1 0 <1 0 90 3rd QU 8/17/11 <:1 0 23 29 <1 0 <1 0 46 4m QU 11/16/11 23 63 '" 12/7/11 <1 0 28 <1 0 <1 0 IstQU 1/18/12 <1 0 18 25 <1 0 <1 0 44 TW4-19 IstQU 3/16/05 NA NA 2 200 NA NA 53 2nd QU 5/25/05 NA NA 1 200 NA NA 57 3rd QU 8/31/05 <5 0 NA 1 400 <5 0 <5 0 46 4m QU 12/7/05 <50 81 2 800 <50 <50 <01 IstQU 3/9/06 <S0 86 1 200 <S0 <50 4 2nd QU 6/14/06 <50 116 1 100 <50 <50 52 3rd QU 7/20/06 <50 123 1 120 <50 <50 43 4th QU 11/8/06 1 6 134 1 050 26 <1 0 46 1st QU 2/28/07 1 3 133 1 200 <^ 0 <1 0 4 2nd QU 6/27/07 Did not sample 3rd QU 8/15/07 1 9 129 1 100 <1 0 <1 0 4 1 4th QU 10/10/07 1 9 132 1 100 <1 0 <1 0 4 1st QU 3/28/08 29 131 1 800 <1 0 <1 0 22 2nd QU 6/25/08 <1 0 128 1 000 <1 0 <1 0 28 3rd QU 9/10/08 86 113 3 600 <1 0 <1 0 35 2 4th QU 10/15/08 12 124 4 200 <1 0 <1 0 47 8 IstQU 3/4/09 1 2 127 1 100 <1 0 <1 0 32 2nd QU 6/23/09 1 2 132 990 <1 0 <1 0 24 3rd QU 9/14/09 15 43 6 600 <1 0 «:1 0 <0 1 4th QU 12/22/09 16 124 4 700 <1 0 <1 0 26 7 IstQU 2/17/10 1 3 144 940 <1 0 <1 0 2 2nd QU 6/14/10 42 132 1 800 <1 0 <1 0 44 3rd QU 8/16/10 49 142 2 000 <1 0 <1 0 59 4m QU 10/15/10 1 3 146 1 200 <1 0 <1 0 27 IstQU 2/17/11 17 " ~ 135 3 400 <1 0 <1 0 17 0 2nd QU 6/7/11 83 148 4 000 <1 0 <1 0 12 0 3rd QU 8/17/11 2 1 148 970 <1 0 «1 0 30 4m QU11/17/11 148 50 '" 12/5/11 54 2 200 <1 0 <1 0 1st QU 1/23/12 1 5 138 660 <1 0 <1 0 0 6 (1) VOCs were resampled because laboratory missed holding time NA = not analyzed NS = not sampled Bold and red = highest concenUation since monuonng started Bold and blue = lowest concenUation since montonng started Shaded indicates concenUations exceeding GWQS Bold and italics indicates me MDL exceeded the GWQS 1 st Qu = January March 2nd Qu = Apnl June 3rd Qu = July September 4m QU = October December TABLE 1 Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2012 Chloroform Contamination Investigation DUSA White Mesa Mill Well Sampling Event Parameter GWQS Well Sampling Event Carbon Tetrachloride (5 pg/L) Chloride (mg/L) No GWQS Chloroform (70 pg/L) Chloromethane (30 pg/L) Methylene Chloride (5 pg/L) Nitrate Nitrate + Nitrite (10 mg/L) TW4-20 IstQU 3/16/05 Monitor well was not installed 2nd QU 5/26/05 NA NA 39 000 NA NA 101 3rd QU 8/31/05 <10 NA 3 800 <10 <10 29 4m QU 12/7/05 <2S0 131 19 000 <250 <2S0 1 8 IstQU 3/9/06 <S00 120 9^00 <SO0 <S00 38 2nd QU 6/14/06 <S00 235 61 000 <S00 <500 94 3rd QU 7/20/06 <1000 134 5 300 <1000 <1000 29 4m QU11/8/06 71 124 11 000 1 9 22 35 IstQU 2/28/07 31 124 4 400 <1 0 1 1 42 2nd QU 6/27/07 22 112 1 800 <1 0 <1 0 2 3 3rd QU 8/15/07 35 117 5 200 <1 0 1 8 2 1 4m QU 10/10/07 68 170 9 000 <1 0 1 9 56 IstQU 3/28/08 "9 132 13 000 <1 0 1 5 0 9 2nd QU 6/26/08 13 191 30 000 <1 0 1 2 80 3rd QU 9/10/08 15 156 21 000 <1 0 37 44 4m QU 10/15/08 NA 168 NA NA NA 55 IstQU 3/4/09 ~ 57 164 8 200 <1 0 52 5 1 2nd QU 6/23/09 49 164 6 800 <1 0 42 29 3rd QU 9/14/09 84 153 13 000 <1 0 44 33 4m QU 12/14/09 14 187 15 000 <1 0 30 53 1st QU 2/17/10 27 179 3 500 <1 0 32 20 2nd QU 6/14/10 11 200 18 000 <1 0 37 56 3rd QU 8/16/10 12 196 15 000 <1 0 22 53 4m QU 10/15/10 20 203 24 000 <1 0 55 46 IstQU 2/23/11 27 220 31 000 <1 0 19 0 44 2nd QU 6/1/10 10 177 8100 <1 0 2 1 48 3rd QU 8/17/11 73 207 3 800 <1 0 3 1 65 4m QU 11/16/11 72 186 7 900 <1 0 25 42 IstQU 1/23/12 "10 207 11 000 <1 0 1 3 79 TW4 21 IstQU 3/16/05 Monitor well was not installed 2nd QU 5/25/05 NA NA 192 NA NA 146 3rd QU 8/31/05 <5 0 NA 78 <5 0 <5 0 10 1 4m QU 12/7/05 <1 0 353 86 <1 0 <1 0 96 IstQU 3/9/06 <2 5 347 120 <2 5 <2 5 85 2nd QU 6/14/06 <2 5 318 120 <2 5 <2 5 102 3rd QU 7/20/06 <2 5 357 108 <2 5 <2 5 89 4m QU11/8/06 2 296 139 <1 0 <1 0 87 IstQU 2/28/07 1 8 306 160 <1 0 <1 0 87 2nd QU 6/27/07 58 327 300 <1 0 <1 0 86 3rd QU 8/15/07 <1 0 300 140 <1 0 <1 0 86 4m QU 10/10/07 <1 0 288 120 <1 0 <1 0 83 IstQU 3/28/08 ' 7 331 390 <1 0 <1 0 143 2nd QU 6/25/08 1 7 271 180 <1 0 <1 0 88 3rd QU 9/10/08 1 6 244 120 <1 0 <1 0 7 57 4m QU 10/15/08 NA 284 NA NA NA 80 4m QU11/18/09 2 NA 170 <2 0 <2 0 NA IstQU 3/11/09 <1 0 279 180 <1 0 <1 0 8 3 2nd QU 6/23/09 <1 0 291 200 <1 0 <1 0 8 1 3rd QU 9/14/09 <1 0 281 200 <1 0 <1 0 92 4m QU 12/22/09 <1 0 256 160 <1 0 <1 0 84 IstQU 2/25/10 <1 0 228 170 <1 0 <1 0 84 2nd QU 614/10 <1 0 266 210 <1 0 <1 0 12 0 3rd QU 8/13/10 92 278 390 <1 0 <1 0 140 4m QU 10/15/10 1 2 210 200 <1 0 <1 0 70 IstQU 2/22/11 1 2 303 230 <1 0 <1 0 90 2nd QU 6/28/10 48 290 290 <1 0 <1 0 12 0 3rd QU 8/17/11 63 287 460 <1 0 <1 0 140 4th QU 11/16/11 287 130 '" 12/7/11 67 390 <1 0 <1 0 1st QU 1/19/12 64 228 420 <1 0 <1 0 150 TW4-22 1st QU 3/16/05 Monitor well was not installed 2nd QU 5/26/05 NA NA 340 NA NA 182 3rd QU 8/31/05 <5 0 NA 290 <5 0 <5 0 157 4m QU 12/7/05 <5 0 253 320 <5 0 <5 0 15 1 1st QU 3/9/06 <10 236 390 <10 <10 15 3 2nd QU 6/14/06 <10 221 280 <:10 <10 14 3 3rd QU 7/20/06 <10 221 864 <:10 <10 14 5 4m QU11/8/06 <1 0 236 350 1 6 <1 0 15 9 IstQU 2/28/07 <1 0 347 440 <1 0 <1 0 20 9 2nd QU 6/27/07 <1 0 273 740 <1 0 <1 0 19 3 3rd QU 8/15/07 <1 0 259 530 <1 0 <1 0 193 4m QU 10/10/07 <1 0 238 440 <1 0 <1 0 188 IstQU 3/28/08 <1 0 519 1 400 <1 0 <1 0 39 1 2nd QU 6/26/08 <1 0 271 1 200 <1 0 <1 0 41 9 3rd QU 9/10/08 1 3 524 6 300 <1 0 <1 0 38 7 4m QU 10/15/08 NA 539 NA NA NA 36 3 4m QU 11/18/09 <2 0 NA 630 <2 0 <2 0 NA IstQU 3/11/09 <1 0 177 390 <1 0 <1 0 20"7 2nd QU 6/23/09 <1 0 177 730 <1 0 <1 0 20 6 3fd QU 9/14/09 <1 0 391 2 300 <1 0 <1 0 40 3 4m QU 12/29/09 <1 0 175 380 <1 0 <1 0 178 IstQU 3/3/10 <1 0 427 2 200 <1 0 <1 0 36 8 2nd QU 6/14/10 <1 0 134 540 <1 0 <1 0 190 3nlQU 8/24/10 <1 0 130 340 <1 0 <1 0 150 4m QU 10/15/10 <1 0 134 340 <1 0 <1 0 160 IstQU 2/22/11 1 2 114 1 300 <1 0 <1 0 180 2nd QU 6/1/11 <1 0 138 210 <1 0 <1 0 170 3rd QU 8/17/11 <:1 0 120 450 <1 0 <1 0 150 4m QU 11/16/11 174 190 '"12/7/11 «:1 0 400 <1 0 <1 0 IstQU 1/19/12 <1 0 36 200 <1 0 <1 0 140 (1) VOCs were resampled because laboratory missed holding t NA = not analyzed NS = not sampled Bold and red = highest concenUation since montionng started Bold and blue = lowest concenUation since montionng started Shaded indicates concenUations exceeding GWQS Bold and italics indicates the MDL exceeded me GWQS 1 st Qu = January March 2nd Qu = Apnl June 3rd Qu = July September 4m Qu = October December TABLE 1 Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2012 Chloroform Contammation Investigation DUSA White Mesa Mill Well Parameter Sampling Event GWQS Carbon Tetrachloride Chloride (mg/L) Chloroform Chloromethane Methylene Chloride Nitrate Nitrate + Nitrite (5 pg/L) No GWQS (70 pg/L) (30 pg/L) (5 pg/L) (10 mg/L) TW4 23 2nd QU 6/27/07 <1 0 47 <1 0 <1 0 <1 0 <0 1 3rd QU 8/15/07 <1 0 46 <1 0 <1 0 <1 0 <0 1 4th QU 10/10/07 <1 0 43 <1 0 <1 0 <1 0 <0 1 IstQU 3/28/08 <1 0 41 <1 0 <1 0 <1 0 <0 1 2nd QU 6/25/08 <1 0 41 <1 0 <1 0 <1 0 <0 1 3rd QU 9/10/08 <1 0 35 <1 0 <1 0 <1 0 <0 05 4m QU 10/15/08 NA 51 NA NA NA <0 05 4th QU11/18/09 <2 0 NA «:2 0 <2 0 <2 0 NA 1st QU 3/4/09 <1 0 41 <:1 0 <1 0 <1 0 <0 1 2nd QU 6/23/09 <1 0 43 <1 0 <1 0 <1 0 <:0 1 3rd QU 9/14/09 <1 0 43 <1 0 <1 0 <1 0 <01 4th QU 12/16/09 <1 0 37 <1 0 <1 0 <1 0 <01 IstQU 2/24/10 <1 0 45 <:1 0 <1 0 <1 0 <01 2nd QU 6/14/10 <1 0 40 <1 0 <1 0 <1 0 <0 1 3rd QU 8/24/10 <1 0 40 <1 0 <1 0 <1 0 <01 4m QU 10/15/10 <1 0 34 <1 0 <1 0 <1 0 <01 IstQU 2/16/11 <1 0 44 <1 0 <1 0 <1 0 <0 1 2nd QU 6/14/11 <1 0 44 <1 0 <1 0 <1 0 <0 1 3rd QU 8/16/11 <1 0 41 <1 0 <1 0 <1 0 <0 1 4m QU 11/15/11 <1 0 43 <1 0 <1 0 <1 0 <0 1 1st QU 1/17/12 <1 0 40 <1 0 <1 0 <1 0 <0 1 TW4-24 2nd QU 6/27/07 <1 0 770 26 <1 0 <1 0 26 1 3rd QU 8/15/07 <1 0 791 22 <1 0 <1 0 29 4th QU 10/10/07 «:1 0 692 1 5 <1 0 <1 0 24 7 1st QU 3/28/08 <1 0 740 1 5 <1 0 <1 0 24 4 2nd QU 6/25/08 <1 0 834 1 4 <1 0 <1 0 453 3rd QU 9/10/08 <1 0 1180 29 <1 0 <1 0 38 4 4m QU 10/15/08 NA 1130 NA NA NA 448 4m QU11/18/09 <2 0 NA <2 0 <2 0 <2 0 NA IstQU 3/4/09 <1 0 1010 1 4 <1 0 <1 0 30 5 2nd QU 6/23/09 <1 0 759 1 5 <1 0 <1 0 30 4 3rd QU 9/14/09 <1 0 618 1 4 <1 0 <1 0 30 7 4m QU 12/16/09 <1 0 1080 1 2 <1 0 <1 0 28 3 IstQU 2/25/10 <:1 0 896 1 3 <1 0 <1 0 331 2nd QU 6/14/10 <1 0 639 1 7 <1 0 <1 0 30 3rd QU 8/24/10 <1 0 587 1 8 <1 0 <1 0 31 4m QU 10/15/10 <1 0 522 1 4 <1 0 <1 0 31 IstQU 2/17/11 <1 0 1100 1 8 <1 0 <1 0 31 2nd QU 5/26/11 <1 0 1110 1 1 <1 0 <1 0 35 3rd QU 8/17/11 <1 0 967 1 7 <1 0 <1 0 34 4m QU 11/16/11 608 35 '" 12/7/11 <1 0 1 2 <1 0 <1 0 1st QUI/16/12 <1 0 373 <1 0 <:1 0 <1 0 37 TW4 25 2nd QU 6/27/07 <1 0 395 <1 0 <1 0 <1 0 17 1 3rd QU 8/15/07 <1 0 382 22 <1 0 <1 0 29 4m QU 10/10/07 <1 0 358 <1 0 <1 0 «1 0 17 IstQU 3/28/08 <1 0 374 <1 0 <1 0 <1 0 187 2nd QU 6/25/08 <1 0 344 <1 0 <1 0 <1 0 22 1 3rd QU 9/10/08 <1 0 333 <1 0 <1 0 <1 0 188 4m QU 10/15/08 NA 366 NA NA NA 21 3 4m QU11/18/09 <2 0 NA <2 0 <2 0 <2 0 NA IstQU 3/4/09 <1 0 332 <1 0 <1 0 <1 0 15 3 2nd QU 6/23/09 <1 0 328 <1 0 <1 0 <1 0 153 3rd QU 9/14/09 <1 0 328 <1 0 <1 0 <1 0 33 4m QU 12/14/09 <1 0 371 <1 0 <1 0 <1 0 14 2 IstQU 2/23/10 <1 0 296 <1 0 <1 0 <1 0 14 4 2nd QU 6/14/10 <1 0 306 <1 0 <1 0 <1 0 16 3rd QU 8/10/10 <1 0 250 <1 0 <1 0 <1 0 14 4m QU 10/15/10 <1 0 312 <1 0 <1 0 <1 0 15 IstQU 2/16/11 <1 0 315 1 8 <1 0 <^ 0 15 2nd QU 5/25/11 <1 0 321 <1 0 <1 0 <1 0 16 3rd QU 8/16/11 <1 0 276 <1 0 <1 0 <1 0 16 4m QU 11/15/11 <1 0 294 <1 0 <1 0 <1 0 16 1st QUI/16/12 <1 0 304 <1 0 <1 0 <1 0 16 TW4 26 2nd QU 6/14/10 <1 0 33 13 <1 0 <1 0 79 3rd QU 8/24/10 <1 0 17 52 <1 0 <1 0 9 4m QU 10/15/10 <1 0 22 54 <1 0 <1 0 96 1st QU 2/16/11 <1 0 30 2 <1 0 <1 0 10 2nd QU 5/26/11 <1 0 15 29 <1 0 <1 0 10 3rd QU 8/17/11 <1 0 19 28 <1 0 <1 0 11 4m QU 11/16/11 26 10 "'12/7/11 <1 0 52 <1 0 <1 0 1st QU 1/18/12 <^ 0 17 7 <1 0 <1 0 11 TW4 27 1st QU 1/18/12 <1 0 nf 9l<1 0 <1 0 24 (1) VOCs were resampled because laboratory missed holding t NA = not analyzed NS = not sampled Shaded indicates concenUations exceeding GWQS Bold and italics indicates the MDL exceeded me GWQS 1 st QU = January March 2nd QU = Apnl June 3nj Qu = July September 4m QU = October December TABLE 1 Historic Summary Of Monitoring Parameters Up To The 1st Quarter 2012 Chloroform Contamination Investigation DUSA White Mesa Mill Well Parameter Sampling Event GWQS Carbon Tetrachloride Chloride Chloroform Chloromethane Methylene Chloride Nitrate Nitrate + Nitrite (5 pg/L) (mg/L) No GWQS (70 pg/L) (30 pg/L) (5 pg/L) (10 mg/L) TW4-6S (Duplicate Sample of TW4 23) 1st QUI/17/12 <10 40 <10 <10 <10 <0 1 TW4-70 (Duplicate Sample of TW4-18) 1st QUI/19/12 <10 19| 26|<1 0 i<1 0 42 NA = not analyzed NS = not sampled Shaded indicates concenUations exceeding GWQS Bold and italics indicates me MDL exceeded me GWQS 1 st QU = January March 2nd Qtr = Apnl June 3rd Qu = July September 4m Qu = October December Table 2 Summary of QA/QC Samples 1st Quarter 2012 Parameter GWQS Parameter GWQS Dup icateof TW4-23 Duplicate of TW4-18 Parameter GWQS TW4-23 TW4-65 RPD TW4-18 TW4-70 RPD Nitrate + Nitnte (as N) 10 mg/L <0 1 <0 1 nc 44 42 47 Chlonde none 40 40 00 18 19 -5 4 Chloroform 70 Mg/L <1 0 <1 0 nc 25 26 -3 9 Carbon tetrachlonde 5 Mg/L <1 0 <1 0 nc <1 0 <1 0 nc Chloromethane 30 Mg/L <1 0 <1 0 nc <1 0 <1 0 nc Methylene Chloride 5 Mg/L <1 0 <1 0 nc <1 0 <1 0 nc nc = not calculated label 3 Chloroform Mass Removal Calculations DUSA White Mesa Mill, Bland, Utah 1st Quarter 2012 DRC Mass Removal Calculations Well ID MW4 MW-26 TW4-4 TW4-19 TW4-20 Ave Chloroform (ug/L) 1,500 2,400 1,200 650 11,000 Chloroform (g/L) 1 50E-03 2 40E-03 1 20E-03 6 50E-04 1 10E-02 Chloroform (Ibs/L) 3 31E-06 5 30E-06 2 65E-06 1 44E-06 2 43E-05 Chloroform (lbs/gal) 1 25E-05 2 01 E-05 1 OOE-05 5 44E-06 9 20E-05 Total gallons pumped 1st qtr 2011 90,376 31,440 101,617 148,747 76,306 lbs of chloroform removed 1 1 06 1 0 08 70 Gallons of chloroform removed 0 1 0 1 0 1 0 1 06 total lbs of chloroform removed 106 total gallons of chloroform remove<d 09