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XzX LEGEND P� O Shallow Zone Monitor Well P� SGC, --o Did not pump CARDINALAVE Location of Reductant Solution Injections • Shallow Zone Extraction Well on January 23,2012 LIBBY in September and October 2010 for the 8<3 @6 @ O 100-Foot Sand Zone Monitor Well J � Full-Scale In Situ Remediation Program O� 0 =40 to 180 ft bgs ♦ 100-Foot Sand Zone Extraction Well = 115 to 180 ft bgs ❑ Intermediate Zone Monitor Well �� / = 115 to 180 ft bgs (in July/August 2012) ■ Intermediate Zone Extraction Well u D 40 to 180 ft bgs (in July/August 2012) i2 -4 5 5116D ® Deep Zone Monitor Well MW-441 NS MW-214(1-8) N.34/ 1.37# � Deep Zone Extraction Well -22.13 11-/_11 " '22.33 MW-447-S # BMW=443 WALKER LANE NS MW-401 0.<3 2 22.08 ® 51161 (2993) N Cuneo o California Water Service Municipal Well <3 @ 590 NS NM MVV-206 590 NS 3.58# N Domestic Well Y -106 MW-442 ® 19 Irrigation Well MW-2 (16.03) Colombini- Colombini 3 Y MW-447 D-22.03 '22.09 MW-439(1-6) NS Colombini 2 NM CWS-62 212 1,620 ANTHONY -23.06 7 @ ® # 1;630 NM <0.2 Did not pump 22 MW-448 S �NS # d Well ID MW-211 MW-325 -22.77 MW-449 D -21 99 9 # 4 2.9 on January 23,2013 2,440 Colombini 2 0.33 " -24.04 Groundwater Elevation Measured on 1.96 # -22.1;4 -2;450 NM Jan. 23, 2013 in Feet Above Mean 3 ® 7,490 11 N Colombini 1 d # 3.11 Sea Level MW-210 MW"11 �j 7,500 MW-448 D NM 5" N 22.05 3.14/3.14# 7 Concentration of Hexavalent MW-209 N W MW-449 S MW-444- 4/4# Colombini 1 O N -22.17 1;460 -23.74 4:50 Chromium in Micrograms per Liter: �+ 1,740 1,470 Ns 2 4.22/4.22 = Detections for Primary M 3• WV-6 1 770 W-467 4-@ ? �-'"24'25 \ and Duplicate Samples MW-328 WArNFR _ZL4.0� MW-446 p p -22.07 ,,� ? -24.55 g Concentration of Total Dissolved -22.07 S 1 2) 14 -22.08 ? -23:75 94.5 @ Qi M Tr 1 40 NS ? ? ? .23:50 NS Chromium in Micrograms per Liter: 98/98 # MW-5 MVLL1 i -20 6_i - PSI ? _23. <3/<3 = Detections for Primary and TW-12 ■ MW-321 (1-9) r, r, -23.50 '2300 25 Duplicate Samples 0 A -22.25_-44.80 1 ? ? MW-326 MW-426 Mw-202 s `' si` '23.25 #,# Sam le Result from October 2012 OQ <0:2 ;,:3, O -22e31 -23. 22.60 -22:75 22.03 MW-7 SQ • �•t �� <3 NS 00 NS MW-431 p 1.42 # MW X08 MW-450 �'4 v1v? ) ++ MW-324(1-10) 6 @22:75 7 @ MW=436.(1-5) ^^ 50 21.92 @1@ Sample Result prior to October 2012 M ? t -36..46 -22.46 -22' j X 22.25 ?/NS 3 � /_-21.85' 1�1 10:3%103 MW213(I-7 + 17.0 N 616# NS Not Sampled ) MW-300 16.6 -61.14 # -57.97 at_�100 MW-450 S 346 17 7 MW-411 A Screened in the Shallow, 100-Foot 22.05 (_) MW-42Z(I=3 LAIR 2,450 -360 MW-424 I-2 2,460 FRANKLIN HI 0700 _ S-6 (-23 56 - W 465 MW C MW-434 Sand, and Intermediate Zones scHooL ,d00 ) W-461 (D 2) -22.21 1 ,1.T• MW-322 NS NS -22.71 © Pumping Well MW-4 -22:10 TROD 4# <3# MW-429(1-4) ,�,`L' �O ( NS MW-425 � • 6 4 (-21.47) Anomalous Data/Not Contoured -22:14 13.7 MW-3 4 0 MW-423 MW=430--22:32 MW-320 15 --22.19 T- MW-422 MW-420 -22.11 NS J 1,050/1,070 -2233 MW-310 MW-325 NS�i:L "21.84 @ w ?4 00 Contour of Equal Groundwater 1,060/1,080 @ NS_ -22.18 (21.01) NS 3 Elevation 41.0 21:88 5- @ �j�.? MW-433 i 2 EW-1 - 6..1-@ NS <3 6 1 ? 41 MW-323 -22.49 X7._82_#_ �-21:75 7 # <3 MW-410 M 4 MW-440 ;tib•00 .Ns 40 Direction of Groundwater Flow -21_-96 MW-3� <0.2 -21.82 t� `�: �g" # 6.63/6.64 -22.15 4 �1' 8/7 NS MW-428 CWS=20 7S 23�c�1� \MW-437 Isoconcentration Contour of 6 NS -21.58 _21.53 Did.Not Pump On NS ? -23.10 50� -� i Total Chromium; NS# NS MW-421 January 232013 6# NS # <3- # , 7/7 Queried where Inferred; 7 -22:03 � Iv .227 4.-22 @ CWS-52 NS <3/<3 @ MW-432 Did notpumpDashed where Approximate. 9 # NS 81 onJanuary 23,2013 ® 0 650HINKLEY 6 # <0.@CO Feet D U D E K Figure 3 SPX Cooling Technologies Groundwater Elevations and Chromium Concentrations in the Intermediate Zone in January 2013 3909-20 AUGUST 2013 Stockton,California