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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-322 Intermediate 4/1/2008 Baseline/2nd Qtr 4.5 19.2 NA 10 11 <10 116 <10 339 <1.0 7/10/2008 3rd Qtr. 3.3 35.7 NA 10 23 <10 690 840 537 2.2 7/10/2008 3rd Qtr. (Dup) 3.3 35.5 NA 10 24 <10 610 860 559 2.2 10/22/2008 4th Qtr. 2.6 36.9 NA 10 <10 <10 <100 2,150 577J 3.9J 1/8/2009 1st Qtr. 3.8 40.1 NA 8 38 10 <100 1,470 562 <1.0 4/7/2009 2nd Qtr. 4.6 34.7 NA 9 14 <10 412 1,560 607 2.1 J 7/14/2009 3rd Qtr. NA 36.2 NA 7 16 20 542 1,620 591 1.4 7/14/2009 3rd Qtr. (Dup) NA 38.0 NA 7 18 20 477 1,560 605 1.4 10/14/2009 4th Qtr. NA 36.9 NA 9 46 30 454 1,230 614 1.6 10/14/2009 4th Qtr. (Dup) NA 38.5 NA 9 45 30 439 1,250 592 1.4 2/2/2010 1st Qtr. NA 37.9 NA 9 63 50 492 890 587 0.6 4/14/2010 2nd Qtr. NA 39.8 NA 101 58 60 346J 840 570 0.8U 4/14/2010 2nd Qtr. (Dup) NA 39.8 NA 8 57 60 270 750 579 0.71JI 7/8/2010 3rd Qtr. NA 45.6 NA 10 44 40 464 890 605 7.3 10/13/2010 4th Qtr. NA 45.6 NA 11 32 20 453 1,010 603 0.5J 12/6/2010 4th Qtr. NA 50.6 NA 12 26 20.8 405 880 691 1.0 1/21/2011 1st Qtr. NA 52.1 NA 12 27 22.1 382 920 734 <1.0 4/14/2011 2nd Qtr. NA 49.2 NA 11 30 22.8 221 450 551 0.5J 7/21/2011 3rd Qtr. NA 57.3 NA 10 22 10 415 430 602 1.0 10/13/2011 4th Qtr. NA 67.8 NA 9 7J 6.9 311 930 721 0.3J MW-323 Intermediate 1/14/2008 Baseline 4.7 41.7 NA <5 11 <10 275 <10 551 <1.0 4/2/2008 2nd Qtr. 5.0 43.0 NA <5 15 <10 208 <10 519 <1.0 4/2/2008 2nd Qtr. (Dup) 4.9 43.5 NA <5 12 10 204 <10 573 <1.0 7/11/2008 3rd Qtr. 5.5 45.6 NA <5 <10UJ <10 615 <101.1J 588 <1.0 10/21/2008 4th Qtr. 4.7 43.1 NA <5 29 <10 <100 <10 577 2.8 10/21/2008 4th Qtr. (Dup) 4.7 44.2 NA <5 29 <10 <100 <10 565 2.6 1/9/2009 1st Qtr. 4.8 47.1 NA 5 24 10 <100 <10 575 <1.0 1/9/2009 1st Qtr. (Dup) 4.6 45.9 NA 6 23 10 <100 <10 594 <1.0 4/7/2009 2nd Qtr. 5.2 42.7 NA <5 <10 <10 410 10 595 <1.0 7/14/2009 3rd Qtr. NA 42.0 NA <5 <10 <10 442 <10 570 1.2 10/12/2009 4th Qtr. NA 40.7 NA 4 14 <10 408 <10 610 1.3 2/1/2010 1st Qtr. NA 40.8 NA 4 26 <10 408 <10 557 0.4 4/13/2010 2nd Qtr. NA 17.0 NA 7 9 <10UJ 100 <10 319 0.6U 7/7/2010 3rd Qtr. NA 40.7 NA 4J 14 <10 457 <10 560 0.6J 10/12/2010 4th Qtr. NA 41.1 NA 4J 16 <10 430 <10 568 1.1 10/12/2010 4th Qtr. (Dup) NA 41.6 NA 4J 16 <10 452 <10 584 0.91 1/20/2011 1st Qtr. NA 41.2 NA 5 11 4.73 366 <10 589 0.6J 1/20/2011 1st Qtr. (Dup) NA 44.3 NA 4J 10 4.66 419 <10 580 0.3J 4/13/2011 2nd Qtr NA 30.8 NA 5 7J 4.04 156 <10 454 <1.0 4/13/2011 2nd Qtr. (Dup) NA 30.5 NA 5 7J 4.07 171 <10 447 <1.0 7/20/2011 3rd Qtr. NA 37.3 NA 4J 10 <10 298 <10 501 <1.0 10/12/2011 4th Qtr. NA 42.8 NA 2J <10 <0.5 280 20 608 1.4 MW-324 (1-10) Intermediate 4/2/2008 Baseline/2nd Qtr 9.7 22.6 NA 8 21 20 178 <10 463 <1.0 5/20/2008 Supplemental 9.3 28.7 NA 7 14 <10 258 <10 481J <1.0 7/11/2008 3rd Qtr. 11.11 27.0 NA 8 15 <10 510 <10 483 <1.0 10/22/2008 4th Qtr. 9.6 28.4 NA 9 191 10 <100 <10 507J <1.0 10/22/2008 4th Qtr. (Dup) 9.5 28.9 NA 9 13 10 <100 <10 483J 1.6J 1/9/2009 1st Qtr. 10.1 40.2 NA <5 42 <10 <100 <10 644 <1.0 4/7/2009 2nd Qtr. 9.7 26.0 NA 8 14 <10 350 <10 467 <1.0 7/15/2009 3rd Qtr. NA 25.5 NA 8 14 10 554 <10 496 1.2 10/14/2009 4th Qtr. NA 28.8 NA <5 <10 <10 <50 <10 494 1.4 2/2/2010 1st Qtr. NA 25.9 NA 7 23 10 515 <10 553 0.4U 4/14/2010 2nd Qtr. NA 26.9 NA 6 14 10 294 <10 535 3.1 7/8/2010 3rd Qtr. NA 28.8 NA 7 22 10 465 <10 532 0.6J 10/13/2010 4th Qtr. NA 26.5 NA 8 17 <10 359 <10 587 0.51 12/6/2010 4th Qtr NA 25.7 NA 8 14 10.4 336 <10 803 0.5J 1/21/2011 1st Qtr. NA 25.5 NA 8 12 10.6 326 <10 701 <1.0 4/14/2011 2nd Qtr. NA 26.3 NA 8J 16 10.5 239J <10 496 0.2J 4/14/2011 2nd Qtr. (Dup) NA 26.5 NA 6 15 10.5 136 <10 516 0.3J 5/23/2011 Supplemental NA NA NA NA 15 10 327 <10 NA <1.0 6/20/2011 Supplemental NA NA NA NA 15 10 213 <10 NA 1.3J 6/20/2011 Supplemental(Dup) NA NA NA NA 16 10 228 <10 NA <1.0 7/20/2011 3rd Qtr. NA 24.5 NA 7.0 13 10 368 <10 507.0 <1.0 8/22/2010 Supplemental NA NA NA NA 15 12.1 107 <10 NA 0.6J 10/13/2011 4th Qtr. NA 24.5 NA 6 12 12.4 274 <10 534.0 0.2J (Page 11 of 19)