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TABLE 1 <br /> LABORATORY ANALYTICAL RESULTS <br /> FORMER MARLEY COOLING TOWER SITE <br /> STOCKTON,CALIFORNIA <br /> Page 19 of 24 <br /> Laboratory Analyses <br /> Screened Hexavalent <br /> Water-bearing Nitrate as N CaICIUm Chromium Chromium Manganese <br /> Well Zone Sample Date Event/Purpose mg1L* Sulfate mg/L) (mg/L) Arsenic pgIL) (tag/L** Iron gIL g1L TDS mg1L TOC(mglL <br /> Water Qual Objective 10 250 10 50 50 300 50 450 <br /> Back roundlCom liance Wells Continued <br /> MW-202 Shallow 1!312008 background 7.5 45.2 NA <5 <10 <10 227 <10 556 <1.0 <br /> 4/1/2008 2nd Qtr./Compliance 8.1 43.7 NA <5 15 <10 248 <10 563 <1.0 <br /> 7/10/2008 3rd Qtr./Compliance 9.2 37.9 NA <5 <10 410 830 <10 636 <1.0 <br /> 10/21/2008 4th Qtr.lCompliance 7.5 37.6 NA <5 15 <10 <100 <10 620 2.2 <br /> 1/9/2009 1st Qtr. 8.3 39.8 NA <5 33 <10 <100 <10 573 <1,0 <br /> 41712009 2nd Qtr. 7.3 36.7 NA <br /> a5 <10 <10 429 <10 541 <1.0 <br /> 7/14/2009 3rd Qtr, NA 37.0 NA <5 <10 <10 630 <10 612 1.7 <br /> 10/12/2009 4th Qtr. NA 392 NA 3 41 <10 604 <10 670 1.4 <br /> 2/112010 1st Qtr. NA 38.6 NA 2 31 <10 676 <10 798 0.6 <br /> 4/13/2010 2nd Qtr. NA 40.0 NA 3 26 <10 423 <10 737 <1 <br /> 7!712010 3rd Qts, NA 30,5 NA 33 81 <10. 472 <10 587 0.81 <br /> 10/13/2010 4th Qtr. NA 39.4 NA 3J 15 <10 493 <10 585 1.0 <br /> 4/21/2011 1st Qtr. NA 40.6 NA 4J 12 3.36 360 <10 727 <1.0 <br /> 4/1312011 2nd Qtr. NA 36.2 NA 31 7J 2.67 233 <10 541 <1.0 <br /> 7/20/2011 3rd Qtr. NA 41.0 NA 31 6J <10 454 <10 621 <1.0 <br /> 10/12/2011 4th Qtr. NA 41.7 NA 2J W 1.57 327 91 678 0.51 <br /> 1/25/2012 1st Qtr. NA 45.8 NA 21 5J 4.08 281 <10 585 0.91 <br /> 4/24/2012 2nd Qtr. NA 47.8 NA 3J 10 4.46 281 <10 639 0.91 <br /> 7124/2012 3rd Qtr NA 51.0 NA 3J 13 4.41 303 <10 632 0.7J <br /> 10/24/2012 4th Qtr NA N k NA NA 7J NA NA NA NA NA <br /> 1/25/2013 1st Qtr. NA NA NA NA 4J NA NA NA NA NA <br /> MW-210 Shallow 1/9/2008 Background 7.1 22.3 NA <5 <10 <10 161 <10 445 <1.0 <br /> 4/1/2008 2nd Qtr.tGompliance 6.5 19.4 NA <5 11 <10 160 <10 415 40 <br /> 7/10/2008 3rd Qtr.lCompliance 5.8 16.5 NA <5 <10 <10 400 <10 424 2.4 <br /> 10/24/2008 4th Qtr.lCompliance 5.0 15.7 NA <5 <10 <10 <100 <10 470 4.7 <br /> 1!812009 1st Qtr. 4.4 20.2 J NA <5 10 <10 <100 <10 479 2.0 <br /> 4/7/2009 2nd Qtr. <1,0 10.5 NA <5 <10 <10 270 <10 412 4.3 J <br /> 7/14/2009 3rd Qtr. NA 24.0 NA <5 <10 <10 271 20 405 2.7 <br /> 10/1212009 4th Qtr. NA 24.6 NA 2 6 <10 278 30 416 1.6 <br /> 2/1/2010 1st Qtr. NA 29.7 NA 2 14 <10 284 20 413 1.9 <br /> 4/13/2010 2nd Qtr. NA 25.5 NA 4 12 <10 159 <10 416 1.0 <br /> 7/7/2010 3rd Qtr NA 20.4 NA 31 t0 <10 285 <10 386 1.9 <br /> 10/42/2010 4th Qtr. NA 23.3 NA 31 17 <10 296 <10 488 1A <br /> 112012011 list Qtr. NA 21.6 NA 31 61 1.26 224 <10 503 1.1 <br /> 4!1312011 2nd Qtr. NA '21.3 NA 3J 61 1.31 229 <10 429 1.6 <br /> 7119!2041 3rd Qtr. NA 17.8 NA 2J 4J <br /> <10 135 <10 377 <1.0 <br /> 10/12/2011 4th Qtr. NA 20.5 NA 2J <10 <0.5 253 6J 501 2.0 <br /> 1/24/2012 1st Qtr. NA 18.4 NA 31 31 1.26 158 81 408 1.7 <br /> 4/24/2012 2nd Qtr. NA 15.4 NA 4J 5J 1.00 112 <10 336 1.3 <br /> 7!2412012 3rd Qtr NA 16.6 NA 3J 4J 0.93 152 <10 394 11 <br /> 10/23/2012 4th Qtr NA NA NA NA 4J NA NA NA NA NA <br /> 1/2512013 1st Qtr. NA NA NA NA <10 NA NA NA NA NA <br /> MW 302 Shallow 1/9/2008 Background 3.5 16.2 NA <5 <10 <10 167J <10 377 <1.0 <br /> 4/1/2008 2nd Qtr./Compliance 3.4 23.2 NA <5 10 <10 140 <10 423 <1.0 <br /> 4/1/2008 2nd Qtr.lSupplernental(Dup) 3.4 23.3 NA <5 11 <10 177 <10 405 <4.0 <br /> 7/10/2008 3rd Qtc[Compliance 4.2 24.5 NA <5 <10 <10 492 <10 471 0.0 <br /> 7/10/2008 3rd Qtr,(Dup) 4.3 25.1 NA <5 <10 <10 455 <10 458 <1.0 <br /> 40/21/2008 4th Qtr./Compliance 4.5 18.7 NA <5 13 <10 <100 <10 436 2.4 <br /> 1/9/2009 1st Qtr. 4.5 20.3 NA <5 37 <10 <100 <10 464 <1.0 <br /> 4/7/2009 2nd Qtr. 3.9 57.1 NA <5 <10 <10 340 <10 537 1.5 J <br /> 7/1412009 3rd Qtr. NA 23,1 NA <5 <10 <10 386 <10 474 1.3 <br /> 10/12/2009 4th Qtr. NA 24.8 NA 4 9 <10 326 <10 455 1.4 <br /> 10/1212009 4th Qtr.(Dup) NA 24.6 NA 4 12 <10 323 <10 451 1.4 <br /> 2/1/2010 istQtr, NA 17.2 NA 4 14 <10 290 <10 ! 38a 0.9 <br /> 4/13/2010 2nd Qtr. NA 18.9 NA 4 14 <10 134 <40 404 <1 <br /> 7/7/2010 3rd Qtr. NA 16.6 NA 4J 91 <10 279 <10 403 0.51 <br /> 7/7/2010 3rd Qtr,(Dup) NA 46.5 NA 4J 81 <40 371 <10 386 0.4J <br /> 10/13/2010 4th Qtr. NA 16.7 NA 4J 10 <10 287 <10 388 0.51 <br /> 1/21/2011 1 a Qtr, NA 15.4 NA 5 6J 2.04 155 <10 426 <1.0 <br /> 4/14/2011 2nd Qtr, NA 14.6 NA 5 81 1.59 129 <10 334 0.3J <br /> 7/20/2011 3rd Qtr. NA 14.3 NA 4J 3J <10 232 30 322 <1.0 <br /> 10/12/2011 4th Qtr. NA 48.2 NA 3J 4J 2.11 227 <10 499 0.31 <br /> 1/25/2012 1st Qtr. NA 29.0 NA W <10 1.47 169 51 402 1.0 <br /> 4/24/2012 2nd Qtr. NA 16.0 NA 5 <10 1.35 123 <10 333 0.83 <br /> 7/23/2012 3rd Qtr NA 23.0 NA 4J 4J 1.02 126 <10 374 0.51 <br /> 10/2312012 4th Qtr NA NA NA NA U NA NA NA ' NA NA <br /> 4/2512013 1st Qtr. NA NA NA NA <10 NA NA NA NA NA <br />