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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 Background/Compliance Wells Continued MW-202 Shallow 1/9/2008 Background 7.5 45.2 NA <5 <10 <10 227 <10 556 <1.0 4/1/2008 2nd Qtr./Compliance 8.1 43.7 NA <5 15 <10 218 <10 563 <1.0 7/10/2008 3rd Qtr./Compliance 9.2 37.9 NA <5 <10 <10 830 <10 636 <1.0 10/21/2008 4th Qtr./Compliance 7.5 37.6 NA <5 15 <10 <100 <10 620 2.2 1/9/2009 1st Qtr. 8.3 39.8 NA <5 33 <10 <100 <10 573 <1.0 4/7/2009 2nd Qtr. 7.3 36.7 NA <5 <10 <10 429 <10 541 <1.0 7/14/2009 3rd Qtr. NA 37.0 NA <5 <10 <10 630 <10 612 1.7 10/12/2009 4th Qtr. NA 39.2 NA 3 11 <10 604 <10 670 1.4 2/1/2010 1st Qtr. NA 38.6 NA 2 31 <10 676 <10 798 0.6 4/13/2010 2nd Qtr. NA 40.0 NA 3 26 <10 423 <10 737 <1 7/7/2010 3rd Qtr. NA 30.5 NA 3J 8J <10 472 <10 587 0.8J 10/13/2010 4th Qtr. NA 39.4 NA 3J 15 <10 493 <10 585 1.0 1/21/2011 1st Qtr. NA 40.6 NA 4J 12 3.36 360 <10 727 <1.0 4/13/2011 2nd Qtr. NA 36.2 NA 3J 7J 2.67 233 <10 541 <1.0 7/20/2011 3rd Qtr. NA 41.0 NA 3J 6J <10 454 <10 621 <1.0 10/12/2011 4th Qtr. NA 41.7 NA 2J 3J 1.57 327 91 678 0.5J MW-210 Shallow 1/9/2008 Background 7.1 22.3 NA <5 <10 <10 161 <10 445 <1.0 4/1/2008 2nd Qtr./Compliance 6.5 19.4 NA <5 11 <10 160 <10 415 <1.0 7/10/2008 3rd Qtr./Compliance 5.8 16.5 NA <5 <10 <10 400 <10 424 2.4 10/21/2008 4th Qtr./Compliance 5.0 15.7 NA <5 <10 <10 <100 <10 470 4.7 1/8/2009 1st Qtr. 4.4 20.2 J NA <5 10 <10 <100 <10 479 2.0 4/7/2009 2nd Qtr. <1.0 10.5 NA <5 <10 <10 270 <10 412 4.3 J 7/14/2009 3rd Qtr. NA 24.0 NA <5 <10 <10 271 20 405 2.7 10/12/2009 4th Qtr. NA 24.6 NA 2 6 <10 278 30 416 1.6 2/1/2010 1st Qtr. NA 29.7 NA 2 14 <10 284 20 413 1.9 4/13/2010 2nd Qtr. NA 25.5 NA 4 12 <10 159 <10 416 1.0 7/7/2010 3rd Qtr NA 20.4 NA 3J 10 <10 285 <10 386 1.9 10/12/2010 4th Qtr. NA 23.3 NA 3J 17 <10 296 <10 488 1.0 1/20/2011 1st Qtr. NA 21.6 NA 3J 6J 1.26 224 <10 503 1.1 4/13/2011 2nd Qtr. NA 21.3 NA 3J 8J 1.31 229 <10 429 1.6 7/19/2011 3rd Qtr. NA 17.8 NA 2J 4J <10 135 <10 377 <1.0 10/12/2011 4th Qtr. NA 20.6 NA 2J <10 <0.5 253 6J 501 2.0 MW-302 Shallow 1/9/2008 Background 3.5 16.2 NA <5 <10 <10 167J <10 377 <1.0 4/1/2008 2nd Qtr./Compliance 3.4 23.2 NA <5 10 <10 140 <10 423 <1.0 4/1/2008 2nd Qtr./Supplemental(Dup) 3.4 23.3 NA <5 11 <10 177 <10 405 <1.0 7/10/2008 3rd Qtr./Compliance 4.2 24.5 NA <5 <10 <10 492 <10 471 <1.0 7/10/2008 3rd Qtr. (Dup) 4.3 25.1 NA <5 <10 <10 455 <10 458 <1.0 10/21/2008 4th Qtr./Compliance 4.5 18.7 NA <5 13 <10 <100 <10 436 2.4 1/9/2009 1st Qtr. 4.5 20.3 NA <5 37 <10 <100 <10 464 <1.0 4/7/2009 2nd Qtr. 3.9 57.1 NA <5 <10 <10 340 <10 537 1.5 J 7/14/2009 3rd Qtr. NA 23.1 NA <5 <10 <10 386 <10 474 1.3 10/12/2009 4th Qtr. NA 24.8 NA 4 9 <10 326 <10 455 1.4 10/12/2009 4th Qtr. (Dup) NA 24.6 NA 4 12 <10 323 <10 451 1.4 2/1/2010 1st Qtr. NA 17.2 NA 4 14 <10 290 <10 388 0.9 4/13/2010 2nd Qtr. NA 18.9 NA 4 14 <10 134 <10 404 <1 7/7/2010 3rd Qtr. NA 16.6 NA 4J 91 <10 279 <10 403 0.5J 7/7/2010 3rd Qtr. (Dup) NA 16.5 NA 4J 8J <10 371 <10 386 0.4J 10/13/2010 4th Qtr. NA 16.7 NA 4J 10 <10 287 <10 388 0.5J 1/21/2011 1st Qtr. NA 15.4 NA 5 6J 2.04 155 <10 426 <1.0 4/14/2011 2nd Qtr. NA 14.6 NA 5 8J 1.59 129 <10 334 0.3J 7/20/2011 3rd Qtr. NA 14.3 NA 4J 3J <10 232 30 322 <1.0 10/12/2011 4th Qtr. NA 48.2 NA 3J 4J 2.11 227 <10 499 0.3J (Page 15 of 19)