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MW-401 Q WELL LOCATED U_ LEGEND 1 620' NORTHEAST U MW-401 Bu�kg-nd Current Proposed Q SHALLOW ZONE WELLS 1/9/2008 10/12/2011 ULBC Nitrate a,N 37 NA 10 MW-5 O MONITOR WELL Im/U z Sulfate(mg/L) 16.9 19.4 22 S-2 ® RECLAMATION WELL MW-211 Arsenic(pg/L) <5 4J 10 w Chromium ,L <10 <10 25 = ADRIENNE AVE 100-FOOT SAND WELLS MW-210 Hexavalent <10 <03 25 ~ Mw-302 Background Current Proposed MW-411 O Chromiummium( /L) � 1/9/2008 10/12/2011 ULBC MONITOR WELL Iron L 93 99300 O Nitrate as N Manganese MW-302 (/') 3.5 NA 10 S-6 ♦ RECLAMATION WELL ( /L) 110 20 50 Sulfate(m/L 16.2 48.2 50 TDS(urg,L) 284 237 450 INTERMEDIATE ZONE WELLS Arsmium(pg/ <5 31 10 MW-1 ❑ MONITOR WELL Former Phase I Chromium(µg/L) <10 4J 25 FORMERection Area Hexavalent In MW-209 RETORT PIT MW-445 Chromium(pg/L) <10 2.11 25 1-3 ■ RECLAMATION WELL O 11 Iron(µg/L) 1671 277 300 1 MW-106 oA 20 Manganese <10 <1° 5o DEEP ZONE WELLS FORMER W-200 MW-2 -'206 O ' MW-2•• TDSImg/L) 377 499 490 MW-460 • MONITOR WELL RUNOFF ° D-1 ® RECLAMATION WELL RETENTION ••• MW-211 Background Current Proposed • ;MVO-6 q 0 ° (Supplemental) 1/21/2008 10/12/2011 ULBC _X X- FENCE 00. Nitrate as N POND a •• _1010; : ` 0 0 ° a-1050° 000 MW-210 Background Current Proposed (mg/L) 7.o NA to DEEP INJECTION • • •_ / O O 1/9/2008 10/12/2011 ULBC Sulfate 29.6 20.4 38.5 POINT (55 to 115 ft) (2008) • • • -212 O O ° ° •° ° °O° O.1• I WATER Nitrate as N 7 1 NA 10 Arsenic(pg/L) <5 41 10 3 (mg/L) Chromium(pg/L) <10 <10 25 SHALLOW INJECTION d; TANK Sulfate 22.3 20.6 29 MW-467 Hexavalent "�' ' • MVV'r1040 ° ° ° o ° �Oo °01° I TW-14 <lo 0.61 zs POINT (55 to 85 ft) (2008) ^ • • O O Icl • • O Arsenic <5 2J 10 Chromium(pg/L) O MW-5 • •• 0 ° MW1213 0 0 0 ° °I I •a• -15 Chrom;um(µg/L) aoo <oo zs MW-328 o-an(µg/L) <10 �9 50 13 ULBC UPPER LIMIT CONCENTRATION o�o00.6 Hexavalent Manganese • °\ O 01 • • • Chrlronl(µg/L�/L) 161 253 300 MW-400 TDS 398 311 517 O 0 ° ° S ■iI °o I ••• •• BOLD VALUES EXCEED PROPOSED ULBC C14 MW-104 ° ° o 1.,1 0 BLDG . . Manganese <10 6 50 (SUPPLEMENTAL) WELLS WERE ADDED FOR MW-301 0 01 I ❑ • • • TDSµ(mg/L) 445 501 490 DAWES AVE � 0MW-107 0 0 ° 0 ° ° o O °01° I MW-447D • SUPPLEMENTAL DATA, BUT Fo r Phase 11 to I MW-447D S Q • MW-IOP o°0 0010 I • OM*204 0 o ARE NOT REQUIRED PER THE � Inj cion Area ° I Z • • • • • • • • • • • • • O 9'o WASTE DISCHARGE REQUIREMENT/ MW-7 • • • • • • • • • • • • • • • • • J 0 N • • • • • • • • • • • q • • • • • O 0 0 MONITORING AND REPORTING MW-20 _1 _1 /LIEOL 8 MW-4 • • • 00 °0° 0°0 MW-321 W-301 PROGRAM. Q • • • 00° W-448D00° CARROL AVE J = ESTIMATED VALUE Q / ••❑BLDG o ° °o • • • • • • • • • • UJ = NOT DETECTED AT MDL 0 w ••• ° 0 °0° I-� -- = NO DATA 3 \ ° ° S-s ■MW 324 NA = NOT ANALYZED LU • BUILDING BLDG o ° -16 4th Qtr/Compliance' Current Proposed mg/L = MILLIGRAMS PER LITER U • • • MW-304 Q 10/22/20M 10/12/2011 ULBC pg/L = MICROGRAMS PER LITER M $ Z MW-363 0 0 -11 Nitrate as N 2.2 NA 10 O Background Current Proposed Background Current Proposed TDS = TOTAL DISSOLVED SOLIDS U MW-202 MW-7 p 0 0 S-7 O O Sulfate m L 31.6 42.4 60 1/9/2008 10/12/2011 ULBC 1/9/2008 10/13/2011 ULBC FIELD MW-320 J O MW-2050 • • • • • • • • • • • • Arsenic l- <5 21 13 Nitrate as Nitrate a,N 5 o o ° ° 0 1 = 4TH QUARTER/COMPLIANCE DATA UTILIZED AS O (mg/L) 7.5 NA 10 Nitrate 8.6 NA 11.2 HOUSE m o O Chromium L 24 6, 25 BASELINE SAMPLING EVENT FOR WELL MW-304. �' O O 1 n-17 Hexavalent Sulfate(mg/L) 45.2 41.7 58.8 Sulfate(mg/L) 42.0 42.7 54.6 O ° Z ° -- 3.13 25 BASEBAL O Chromium(µg/L) Arsenic(µg/L) <5 2, to Arsenic(WL) <5 21 10 0 ° 0 SUPPLEMENTAL INJECTION W ° ° J 0 Iron(µg/L) <100 418 300 m Chromium( /L) <SO 31 25 Chromium /L <10 <10 25 o FIELD O O • O O Manganese U Hexavalent Hexavalent • ° ° m O <10 <SO 50 POINT (2010) no ls7 zs ao 0.88 zs o g L) O Ch romium(µg/L) Chromium(pg/L) 0 0 °°° TDS(mg/L) 8931 859 808.5 Iron(µg/L) 227 327 295.1 Iron(µg/L) 287 339 373 IW-300 ° EW-1 Z.N Manganese Manganese O (pg/L) <10 91 50 (µg/L) <10 20 so OFFICE - � MW-310 Background Current Proposed g TDS m/LI 556 678 612 TDS(mg/L) 577 696 634.7 MW- 2 • • • • • • • • • • • • • • • (Supplemental) 1/21/2008 10/12/2011 ULBC MW- • • • • • • • • • • • • • • • • O Nitrate mg/L)N 6.4 NA 10 U Sulfate(mg/L) 16.5 44.2 21.5 Y FRANKLIN HIGH Arsenic( L) 6.0 IJ 10 0 MW-323 z Chromium( /L) <10 <10 25 SCHOOL a0 <0.5 25 0 FEET 250 Hexavalent � Chromium(µg/L) Iron(µg/L) 243 413 316 MW-201 ManganeseIc SCALE O (p8/L) <10 20 50 U TDS(mg/L) 377 837 490 O Background Current Proposed MW-325 Background Current Proposed E]MW-201 MW-425 2/4/2008 10/13/2011 ULBC (Supplemental) 1/21/2008 10/12/2011 ULBC Nitrate as N Nitrate as N GERTRUDE AVE 14.3 NA 15.7 5.0 NA 10 M W H O Img/L) (mg/LI MW-327 Sulfate(m/L) 49.4 53.9 64.2 Sulfate m L) 17.3 13.6 22.5 MW-304 O ❑ Arsenic(pg/L) 15 21 10 Arsenic L) 9.0 41 11.7 FORMER MARLEY COOLING TOWER COMPANY O Chromium /L) 17 13 50 Chromium(µg/L) <10 <10 2S MW-310 r4 ("g STOCKTON, CALIFORNIA N Hexavalent Hexavalent Chromium( L) <10 10 25 Chromium(µg/L) <lo <0.5 zs MW-325 COMPLIANCE WELL Iron L 390 528 429 Iron( L 157 171 300 ADELBERT AVE d Manganese Manganese ANALYTICAL SUMMARY z <10 <10 so <10 20 so OCTOBER 2011 ADELBERT AVE TDS(mg/0 786 940 864.6 TDS(mg/L) 330 315 450 ®M -364 FIGURE 4