ARCHIVED REPORTS (2) - Laserfiche WebLink

Home Browse Search

TABLE 7 TOTAL AND HEXAVALENT CHROMIUM RESULTS EVALUATION 2013 SEMIANNUAL GROUNDWATER MONITORING REPORT FORMER MARLEY COOLING TOWER SITE STOCKTON,CALIFORNIA Page 3 of 4 Total Chromium and Chromium VI(µg/L) Percent Change in Monitoring Well Screened Water- Chemical Name 4th Qtr and 4th Qtr Supplemental Concentration from Location bearing Zone Compliance(October Sampling(December 1st Qtr Compliance 2nd Qtr Compliance Supplemental(May Supplemental(June 3rd Qtr Compliance Supplemental(August 4th Qtr Compliance 1st Qtr Compliance 2nd Qtr Compliance 3rd Qtr Compliance 4th Qtr Compliance 1st Qtr Compliance 2nd Qtr Compliance 2010) 2010) (January 2011) (Apri12011) 2011) 2011) (July 2011) 2011) (October 2011) (January 2012) (April 2012) (July 2012) (October 2012) (January 2013) (April 2013) Maximum... MW-6 Shallow Chromium 318 NS 14 19 NS NS 3J NS 6J 110 6J 10 6J 29 NS -910/1 Chromium VI 190 NS <0.5 <0.5 NS NS <10 NS <0.5 <0.5 <0.5 <0.5 <0.5 16.2 NS -91% MW-8 Shallow Chromium 142 NS 128 385 NS NS 479 NS 320 260 544 400 195 175 NS -77% Chromium VI 140 NS 127 NS NS 380 NS 175 NS -75% Shallow MW-9 Chromium 14 NS 9J 6J NS NS 8J NS <10 <10 5J N 6J <10 3J -91% Chromium Vi VI <10 NS <0.5 <0.5 NS NS <10 NS <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NM MW-101 Shallow Chromium 13 NS 10 71 NS NS 4J NS 3J 10 51 3J 4J <10 NS -1000/. Chromium VI <10 NS <0.5 <0.5 NS NS <10 NS <0.5 4.52 <0.5 <0.5 <0.5 <0.5 NS -100% MW-102 Shallow Chromium 1,200 NS 11180 11080 NS NS NS 1050 825 620 615 503 570 735 NS -39% Chromium VI 980 NS 1,080 1,030 NS NS NS 988 825 608 600 503 568 731 NS -32% MW-104(S-2) Shallow Chromium 77 NS 68 46 NS NS NS 51 <10 5J <10 71 4J <10 NS -1000/. Chromium VI <10 NS <0.5 <0.5 NS NS NS <0.2 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NS -100% MW-105 Shallow Chromium 25 NS M 11 NS NS 6J NS 81 12 4J 5J <10 <10 NS -100% Chromium VI <10 NS <0.5 <0.5 NS NS <10 NS <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NS -100% MW-106 Shallow Chromium 143 NS 135 272 NS NS 260 NS 157 230 232 143 155 195 NS -61% Chromium VI 140 NS 134 270 NS NS 260 NS 157 228 225 139 154 192 NS -62% MW-204(S-8) Shallow Chromium 4,380 NS 3,250 2,750 NS NS 634 2,030 2,200 500 NS 390 346 365 6J -100% Chromium VI 3,630 NS 2,890 2,620 NS NS 480 2,020 2,190 497 NS 331 322 362 <0.5 -100% MW-205(S-7) Shallow Chromium 714 NS 468 540 NS NS 283 530 450 290 363 380 340 310 450 -37% Chromium VI 580 NS 464 523 NS NS 230 503 450 282 342 355 331 308 339 -50% MW-206 Shallow Chromium 122 133 10 13 NS NS 6J NS <10 M 6J 6J 5J 3J 6J -100% Chromium Vl <10 <10 <0.5 <0.5 NS NS <10 NS <0.5 <0.5 <0.5 NS NS <0.5 <0.5 -100% MW-207 Shallow Chromium 72 NS 49 53 NS NS 28 NS 29 95 58 27 50 21 NS -860/, Chromium VI 70 NS 46.1 52.2 NS NS 20 NS 28.8 34.8 56.3 25.4 48.2 21.2 NS -86% MW-208 Shallow Chromium 20 NS 81 13 NS NS M NS <10 6J <10 M <10 <10 NS -100% Chromium VI 20 NS <0.5 <0.5 NS NS <10 NS <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NS -100% MW-300 Shallow Chromium 16 NS 16 20 NS NS 13 NS 10 29 12 15 11 91 NS -70% Chromium VI <10 NS 9.63 10.5 NS NS 10 NS 9.94 11.1 9.73 9.54 10.5 7.45 NS -63% MW-301 Shallow Chromium 144 NS 100 90 NS NS 100 NS 135 195 63 49 24 10 12 -94% Chromium VI 140 NS 98.2 89.5 NS NS 100 NS 135 110 59.6 42.7 23.2 7.1 9.29 -93% MW-303 Shallow Chromium 18 NS 23 12 NS NS 3J NS 51 3J 51 51 3J 4J <10 -1000/. Chromium VI <10 NS <0.5 <0.5 NS NS <10 NS <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 -100% TW-12 Shallow Chromium 16 NS 12 14 NS NS 91 NS M <10 6J M 4J <10 NS -100% Chromium VI <10 NS <0.5 <0.5 NS NS <10 NS <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NS -100% TW-14 Shallow Chromium 11 NS 11 14 NS NS 91 NS <10 NS NS 6J 3J <10 <10 -100% Chromium VI <10 NS <0.5 <0.5 NS NS <10 NS <0.5 NS NS <0.5 <0.5 <0.5 <0.5 NM TW-17 Shallow Chromium 18 NS 91 12 NS NS M NS <10 <10 <10 M M <10 <10 -100% Chromium VI <10 NS 0.2UJ <0.5 NS NS <10 NS <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NM 8W-1 Shallow/Intermediate Chromium 14 NS 11 6J NS NS 4J NS <10 3J <10 <10 <10 4J <10 -100% Chromium VI <10 NS <0.5 <0.5 NS NS <10 NS <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NM TW-13 100-Foot Sand Chromium 9 9 10 91 NS NS 14 NS M M 6J 12 262 31 NS -100% Chromium VI <10 <10 <0.5 <0.5 NS NS <10 NS <0.5 <0.5 <0.5 <0.5 254 <0.5 NS -100% TW-15 100-Foot Sand Chromium 41 6 <10 4J NS NS 4J NS 16 NS 24 43 37 37 10 -89% Chromium VI 20 <10 0.38J <0.5 NS NS <10 NS 15.8 NS 20.6 39.2 36.8 36.5 6.16 -94% TW-16 100-Foot Sand Chromium 5 5 7J 7J NS NS 4J NS <10 <10 4J M 4J <10 <10 -100% Chromium VI <10 <10 <0.5 <0.5 NS NS <10 NS <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NM 1-11 Intermediate Chromium 60 55 56 80 126 184 196 367 368 450 510 440 305 360 100 -800/1 Chromium VI 60 54.3 56.3 79.8 120 180 190 343 367 441 507 438 303 346 82 -84% MW-1 Intermediate Chromium II NS <10 6J NS NS 5J NS M 4J M 5J 6 <10 NS -100% Chromium VI <10 NS 0.64 3 NS NS <10 NS 2.5 2.71 1.42 2.29 NS NS NS -24% MW-2 Intermedia[, Chromium 30 NS 25 17 NS NS 16 NS 19 20 16 20 20 22 NS -53% Chromium VI 30 NS 25.3 15.1 NS NS 10 NS 19.4 19.8 15.9 18.0 19.0 21.2 NS -47% MW-213(I-7) Intermediate Chromium 2,590 NS 5J 6J NS NS 125 1,390 1,290 <10 5,410 670 2,880 2,460 2,600 -64% Chromium VI 1,970 NS <0.5 <0.5 NS NS 110 1,320 1,220 <0.5 5,120 561 2,710 2,450 2,560 -64% MW-214(1-8) Intermediate Chromium 11 NS 3J 3J NS NS <10 NS <10 4J <10 4J <10 <10 NS -1000/. Chromium VI <10 NS <0.5 <0.5 NS NS <10 NS <0.5 <0.5 <0.5 <0.5 <0.5 <0.5 NS -100% MW-320 Intermediate Chromium NS NS NS 7J NS NS 5 NS M 5J 11 <10 <10 41 49 0% Chromium VI NS NS NS 3.96 NS NS <10 NS 2.6 4.08 10.9 <0.5 <0.5 41.00 49.10 0% MW-321(1-9) Intermediate Chromium 760 474 536 406 140 142 149 136 158 120 4.1 150 57 <10 10 -99% Chromium VI 620 447 517 353 140 150 150 130 158 116 0.43J 149 49.5 <0.5 7.16 -99% MW-322 Intermediate Chromium 32 26 27 30 NS NS 22 NS 7J 16 20 24 15 15 14 -78% Chromium VI 20 20.8 22.1 22.8 NS NS 10 NS 6.9 15.7 17.4 23.4 14.9 13.7 13.3 -78%