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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-361 Deep 1/10/2008 Baseline <1 8.5 NA <5 <10 <10 88 90 144 <1.0
<br /> 4/1/2008 2nd Qtr. <1 13.9 NA 7 <10 <10 63 70 176 <1.0
<br /> 7/10/2008 3rd Qtr. <1 12.9 NA 6 <10 <10 195 50 1901 <1.0
<br /> 10/21/2008 4th Qtr. <1 12.5 NA 6 <10 <10 <100 50 193 3.8
<br /> 10/21/2008 4th Qtr. (Dup) <1 12.5 NA <5 <10 <10 <100 50 172 3.9
<br /> 1/8/2009 1st Qtr. <1 16.2 J NA 5 <10 <10 <100 40 152 <1.0
<br /> 4/7/2009 2nd Qtr. <1 11.1 NA 6 <10 <10 130 40 159 <1.0
<br /> 7/14/2009 3rd Qtr. NA 8.6 NA <5 <10 <10 100 30 132 1.2
<br /> 10/12/2009 4th Qtr. NA 7.8 NA 5 <10 <10 89 30 147 1.6
<br /> 2/1/2010 1st Qtr. NA 4.7J NA 1 3 <10 116 50 81 2.9
<br /> 4/13/2010 2nd Qtr. NA 6.1 NA 6 3 <10 37 30 144 1.9
<br /> 7/7/2010 3rd Qtr. NA 7.8 NA 4J 3J <10 149 20 128 1.3
<br /> 10/12/2010 4th Qtr. NA 9.0 NA 4J 4J <10 139 40 142 1.2
<br /> 1/20/2011 1st Qtr. NA 8.7J NA 6 <10 <0.2 95 40 140 0.7J
<br /> 4/13/2011 2nd Qtr. NA 8.9 NA 5 <10 <0.2 97 50 143 1.4
<br /> 7/19/2011 3rd Qtr. NA 9.3 NA 5 <10 <10 98 40 138 <1.0
<br /> 10/12/2011 4th Qtr. NA 10.4 NA 5 <10 <0.5 119 40 158 0.7J
<br /> MW-363 Intermediate 10/12/2010 4th Qtr. NA 11.4 NA 15 5J <10 50 120 222 0.6J
<br /> 1/20/2011 1 st Qtr. NA 10.3J NA 14 3J 1.91 75 110 220 <1.0
<br /> MW-436(I-5) Intermediate 1/21/2011 1st Qtr. NA 23.2 NA 8 14 10.0 410 <10 675 <1.0
<br /> 1/21/2011 1st Qtr. (Dup) NA 23.1 NA 8 15 10.3 425 <10 711 <1.0
<br /> MW-447S Intermediate 8/9/2010 Baseline NA 53.1 NA <5 7,090 7,080 313 NA 543 1.0
<br /> 8/16/2010 Baseline NA 33.6 NA 6 3,540 3,330 270 NA 387 1.5
<br /> 8/23/2010 Baseline NA 48.7 NA 4J 7,990 7,780 397 NA 578 1.0
<br /> 10/14/2010 4th Qtr. NA 57.2 NA 6 7,700 7,670 370 10 564 1.3
<br /> 12/6/2010 4th Qtr. NA 44.0 NA 5 6,990 6,510 274 <10 542 0.6J
<br /> 1/25/2011 1st Qtr. NA 40.7 NA 4J 6,650 5,740 234 70 670 1.1
<br /> 4/18/2011 2nd Qtr. NA 42.4 NA 6 6,020 5,980 120 10 733 0.4J
<br /> 5/23/2011 Supplemental NA NA NA NA 5,910 5,880 243 <10 NA <1.0
<br /> 6/20/2011 Supplemental NA NA NA NA 5,130 5,200 247 <10 NA <1.0
<br /> 7/21/2011 3rd Qtr. NA 41.2 NA 5 4,950 3,350 413 <10 520 <1.0
<br /> 8/22/2011 Supplemental NA NA NA NA 815 753 71 6J NA 1.11
<br /> 8/22/2011 Supplemental(Dup) NA NA NA NA 868 776 83 7J NA 1.3
<br /> 10/17/2011 4th Qtr. NA 49.8 NA 4J 2,630 2,630 350 <10 627 0.6J
<br /> MW-447D Intermediate 8/9/2010 Baseline NA 40.2 NA 6 2,530 2,360 282 NA 393 2.5
<br /> 8/16/2010 Baseline NA 45.3 NA 6 2,540 2,320 296 NA 442 3.3
<br /> 8/23/2010 Baseline NA 39.7 NA 6 2,500 2,440 275 NA 425 3.0
<br /> 10/14/2010 4th Qtr. NA 32.6 NA 7 3,350 3,120 154 20 425 2.4
<br /> 12/6/2010 4th Qtr. NA 32.4 NA 6 2,960 2,730 223 20 436 1.8
<br /> 1/25/2011 1st Qtr. NA 33.9 NA 6 3,460 3,110 180 10 530 1.1
<br /> 1/25/2011 1st Qtr. (Dup) NA 31.9 NA 6 3,610 3,050 195 10 505 1.1
<br /> 4/18/2011 2nd Qtr. NA 29.7 NA 6 1,620 1,600 53 <10 400 0.3J
<br /> 5/23/2011 Supplemental NA NA NA NA 2,130 1,920 158 <10 NA <1.0
<br /> 6/20/2011 Supplemental NA NA NA NA 2,600 2,290 157 <10 NA 1.01
<br /> 7/21/2011 3rd Qtr. NA 31.0 NA 6 2,370 1,870 300 <10 403 <1.0
<br /> 8/22/2011 Supplemental NA NA NA NA 2,040 1,950 99 <10 NA 1.01
<br /> 10/17/2011 4th Qtr. NA 31.9 NA 6.0 2,290 2,280 206 <10 461.0 0.7J
<br /> (Page 12 of 19)
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