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TABLE 5 LABORATORY ANALYTICAL RESULTS 2011 ANNUAL GROUNDWATER MONITORING REPORT FORMER MARLEY COOLING TOWER SITE STOCKTON,CALIFORNIA Laboratory Analyses Screened Hexavalent Water-bearing Nitrate as N Calcium Chromium Chromium Manganese Well Zone Sample Date Event/Purpose (mg/L)* Sulfate (mg/L) (mg/L) Arsenic (pg/L) (pg/L) (pg/L)** Iron (pg/L) (pg/L) TDS (mg/L) TOC (mg/L) Water Quality Objective 10 250 -- 10 50 50 300 50 450 -- Injection Area Wells Continued MW-208 Shallow 1/14/2008 Baseline 6.3 42.9 NA <5 180 100 374 <10 627 1.3 4/2/2008 2nd Qtr. 5.9 37.2 NA <5 186 180 410 <10 653 <1.0 5/20/2008 Supplemental 4.6 45.9 NA <5 114 120 371 <10 622J 2.5 7/11/2008 3rd Qtr. 3.9J 53.1 NA <5 114 110 994 <10 737 1.2 10/22/2008 4th Qtr. 1.2J 53.9 NA <5 73J 70J <100 930 758J 5.OJ 10/22/2008 4th Qtr. (Dup) 0.9 63.8 NA 5 54 50 <100 930 724J 6.9 1/9/2009 1st Qtr. <1 27.2 NA <5 40 <10 <100 3,970 719 23.0 4/7/2009 2nd Qtr. 1.7 42.0 NA <5 <10 <10 580 1,940 727 2J 7/14/2009 3rd Qtr. NA 40.5 NA <5 <10 <10 654 2,820 724 3.3 10/12/2009 4th Qtr. NA 24.3 NA 3 19 <10 740 5,020 799 14.0 2/1/2010 1st Qtr. NA 25.8 NA 3 30 <10 707 5,860 703 1.3J 2/1/2010 1st Qtr. (Dup) NA 27.6 NA 3 33 <10 753 <10 700 1.2 4/13/2010 2nd Qtr. NA 27.0 NA 3 22 <10 725 7,350 763 <1 7/8/2010 3rd Qtr. NA 24.2 NA 4J 18 <10 718 4,930 754 2.4 10/13/2010 4th Qtr. NA 1.3 NA 2J 20 20 810 4,860 704 0.91 1/20/2011 1st Qtr. NA 24.4 NA 10 8J <0.2 838 3,310 627 3.8 4/14/2011 2nd Qtr. NA 30.8 NA 8 13 <0.2 337 3,150 611 2.4 7/20/2011 3rd Qtr. NA 25.9 NA 9 3.1 <10 364 1,490 420 3.3J 7/20/2011 3rd Qtr. (Dup) NA 24.5 NA 9 3J <10 326 1,520 436 3.8J 10/12/2011 4th Qtr. NA 0.3J NA <5 <10 <0.5 244 890 444 2.7 MW-300 Shallow 1/9/2008 Baseline 5.7 52.8 NA <5 <10 <10 349 10 670 1.7 4/2/2008 2nd Qtr. 5.6 44.9 NA <5 24 10 311 <10 676 <1.0 7/11/2008 3rd Qtr. 6.7 48.4 NA <5 15 <10 775 <10 705 <1.0 10/22/2008 4th Qtr. 10.2 57.0 NA <5 21 10 <100 <10 654J 1.5J 1/9/2009 1st Qtr. 6.6 40.2 NA <5 42J <10 <100 <10 644 <1.0 4/7/2009 2nd Qtr. 6.4 35.6 NA <5 14 20 495 <10 698 1.2 J 7/15/2009 3rd Qtr. NA 29.1 NA <10 20 20 796 <10 674 1.3 10/12/2009 4th Qtr. NA 30.5 NA 4 30 <10 582 <10 703 1.3 2/2/2010 1st Qtr. NA 41.3 NA 3 30 <10 610 <10 692 0.6 4/14/2010 2nd Qtr. NA 49.4 NA 3 15 10 336 <10 685 1.1 7/8/2010 3rd Qtr. NA 56.6 NA 4J 24 <10 566 <10 704 0.7J 10/13/2010 4th Qtr. NA 51.7 NA 4J 16 <10 530 <10 709 0.6J 1/20/2011 1st Qtr. NA 45.0 NA 4J 16 9.63 393 <10 719 0.3J 4/14/2011 2nd Qtr. NA 50.6 NA 4J 20 10.5 509 <10 685 0.3J 7/20/2011 3rd Qtr. NA 51.3 NA 3J 13 10 484 <10 680 1.2J 10/13/2011 4th Qtr. NA 52.9 NA 3J 10 9.94 369 <10 704 0AJ MW-301 Shallow 4/2/2008 2nd Qtr. 14.8 30.4 NA <5 108 100 335 <10 804 <1.0 7/11/2008 3rd Qtr. 20.7 41.2 NA <5 100 90 1,200 <10 876 <1.0 10/22/2008 4th Qtr. 16.3 36.0 NA <5 86 80 <100 <10 861J 1.4 1/9/2009 1st Qtr. 17.1 29.8 NA <5 97 50 <100 <10 954 <1.0 4/8/2009 2nd Qtr. 19.7 31.7 NA <5 90 90 667 <10 898 1.3 J 7/15/2009 3rd Qtr. NA 36.1 NA <5 95 100 1,080 <10 816 1.9 10/15/2009 4th Qtr. NA 35.6 NA 3 86 100 735 <10 855 1.3 10/15/2009 4th Qtr. (Dup) NA 35.7 NA 3 91 120 708 <10 856 1.5 2/2/2010 1st Qtr. NA 42.8 NA 2 88 80 918 <10 873 0.6 4/15/2010 2nd Qtr. NA 44.7 NA 3 125 120 682 <10 806 0.7U 7/8/2010 3rd Qtr. NA 47.3 NA 3J 130 120 782 <10 832 0.91 10/14/2010 4th Qtr. NA 68.6 NA 2J 144 140 1,040 <10 860 1.0 1/25/2011 1st Qtr. NA 288 NA 2J 100 98.2 435 <10 862 <1.0 4/18/2011 2nd Qtr. NA 56.7 NA 3J 90 89.5 284 <10 872 0.4J 7/20/2011 3rd Qtr. NA 44.2 NA 2J 100 100 663 <10 807 11.11 10/13/2011 4th Qtr. NA 35.3 NA 2J 135 135.0 563 <10 941 0.5J (Page 5 of 19)