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TABLE 5
<br /> LABORATORY ANALYTICAL RESULTS
<br /> 2011 ANNUAL GROUNDWATER MONITORING REPORT
<br /> FORMER MARLEY COOLING TOWER SITE
<br /> STOCKTON,CALIFORNIA
<br /> Laboratory Analyses
<br /> Screened Hexavalent
<br /> Water-bearing Nitrate as N Calcium Chromium Chromium Manganese
<br /> 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)
<br /> Water Quality Objective 10 250 -- 10 50 50 300 50 450 --
<br /> Injection Area Wells Continued
<br /> MW-448S Intermediate 8/10/2010 Baseline NA 38.3 NA <5 2,300 2,220 380 20 957 1.0
<br /> 8/16/2010 Baseline NA 35.5 NA <5 2,060 1,820 357 NA 537 1.0
<br /> 8/23/2010 Baseline NA 32.7 NA 4J 1,890 1,870 388 NA 566 0.8J
<br /> 10/14/2010 4th Qtr. NA 36.4 NA 6 2,120 2,110 359 20 550 1.1
<br /> 12/6/2010 4th Qtr. NA 35.6 NA 5 2,170 2,010 374 7J 655 0.6J
<br /> 1/25/2011 1st Qtr. NA 34.6 NA 4J 2,280 2,030 314 7J 587 <1.0
<br /> 4/14/2011 2nd Qtr. NA 23.3 NA 6 1,370 1,210 56 40 373 4.0
<br /> 5/23/2011 Supplemental NA NA NA NA 1,350 1,150 183 <10 NA 1.1
<br /> 6/20/2011 Supplemental NA NA NA NA 1,570 1,570 202 20 NA 3.OJ
<br /> 7/21/2011 3rd Qtr. NA 31.1 NA 5.0 1,820 1,530 417 20 486 2.0
<br /> 8/22/2011 Supplemental NA NA NA NA 2,240 2,150 170 10 NA 1.7J
<br /> 10/17/2011 4th Qtr. NA 34.7 NA 4J 2,230 2,230 326 91 583.0 0.8J
<br /> MW-448D 8/16/2010 Baseline NA 48.0 NA 5 4,110 4,040 405 NA 611 2.0
<br /> 8/23/2010 Baseline NA 46.5 NA 5 4,980 4,910 476 NA 649 1.8
<br /> 10/14/2010 4th Qtr. NA 53.7 NA 7 12,800 12,500 380 20 632 1.4
<br /> 12/6/2010 4th Qtr. NA 45.5 NA 6 10,800 10,300 272 10 597 0.91
<br /> 1/25/2011 1st Qtr. NA 40.1 NA 6 9,790 8,410 348 10 514 <1.0
<br /> 4/18/2011 2nd Qtr. NA 38.2 NA 6 7,870 7,500 104 <10 476 0.3J
<br /> 5/23/2011 Supplemental NA NA NA NA 9,240 9,040 260 <10 NA <1.0
<br /> 5/23/2011 Supplemental(Dup) NA NA NA NA 9,350 9,040 249 <10 NA <1.0
<br /> 6/20/2011 Supplemental NA NA NA NA 9,770 9,000 229 6J NA <1.0
<br /> 7/21/2011 3rd Qtr. NA 43.8 NA 5 9,170 8,570 366 5J 516 <1.0
<br /> 7/21/2011 3rd Qtr. (Dup) NA 49.4 NA 5 9,320 8,980 398 7J 511 <1.0
<br /> 8/22/2011 Supplemental NA NA NA NA 8,320 8,220 137 <10 NA 1.0J
<br /> 10/17/2011 4th Qtr. NA 32.8 NA 6 4,440 4,440 208 <10 433 0.3J
<br /> EW-3 Intermediate 12/6/2010 4th Qtr. NA 107 NA 3J 31,700 28,800 329 91 788 0.8J
<br /> 1/25/2011 1st Qtr. NA 119 NA 3J 37,100 33,300 321 6J 733 <1.0
<br /> 1/25/2011 1st Qtr. (Dup) NA 122 NA 3J 38,000 33,900 335 7J 783 <1.0
<br /> 4/18/2011 2nd Qtr. NA 39.1 NA 4J 10,100 8,510 65J <10 410 0.7J
<br /> 4/18/2011 2nd Qtr. (Dup) NA 37.9 NA 4J 9,280 8,800 95 <10 417 0.5J
<br /> 7/21/2011 3rd Qtr. NA 25.2 NA 3J 5,210 3,580 223 10 358 <1.0
<br /> 7/21/2011 3rd Qtr. (Dup) NA 23.5 NA 3J 5,440 4,300 250 10 311 <1.0
<br /> 10/17/2011 4th Qtr. NA 54.5 NA 3J 12,400 12,400 232 40 529 0.91
<br /> EW-4 Intermediate 12/8/2010 4th Qtr. NA 14.5 NA 8 29 28 167 <10 418 5.2
<br /> 1/21/2011 1 st Qtr. NA 15.8 NA 9 194 232 209 5J 529 3.6
<br /> 4/18/2011 2nd Qtr. NA 12.8 NA 5 38 26.1 193J <10 395 0AJ
<br /> 7/21/2011 3rd Qtr. NA 14.0 NA 5 23 10 230 <10 377 <1.0
<br /> 10/13/2011 4th Qtr. NA 14.3 NA 5 15 13.6 156 <10 362 3.1
<br /> EW-5 Intermediate 12/8/2010 4th Qtr. NA 16.2 NA 4J 55 54.6 206 <10 388 0.7J
<br /> 1/25/2011 1st Qtr. NA 14.5 NA 4J 54 52.7 96 <10 391 <1.0
<br /> 4/18/2011 2nd Qtr. NA 13.7 NA 5 18 8.42 44J 5J 345 0.2J
<br /> 7/21/2011 3rd Qtr. NA 15.2 NA 4J 16 10 264 <10 378 <1.0
<br /> 10/13/2011 4th Qtr. NA 16.4 NA 3J 13 13.2 165 <10 378 0.3J
<br /> (Page 13 of 19)
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