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XzX LEGEND O Shallow Zone Monitor Well P BGG CWS-35 CARDINALAVE --o Did Not Pump On' Location of Reductant Solution Injections • Shallow Zone Extraction Well July 16,2012 LIBBY in September and October 2010 for the o.76 @ O 100-Foot Sand Zone Monitor Well OJ <3 @ Full-Scale In Situ Remediation Program O\ =40 to 180 ft bgs ♦ 100-Foot Sand Zone Extraction Well 00�A< �� = 115 to 180 ft bgs ❑ Intermediate Zone Monitor Well CO �� ■ Intermediate Zone Extraction Well MW-445 ® Deep Zone Monitor Well (-30.21) MW-441 NS MW-214(1-8) Deep Zone Extraction Well \ 11/_11 @ -22.00 MW-447S__ ❑ MW-443 WALKER LANECuneo 21.05 \�j MW-401 <0.2/<0.2 22.46 N NM NM ® NM o California Water Service Municipal Well 7@ 4/3 1,950 205# 51161 N@ 4.13/4.11 # M - 06 2,060 4# NM 5 6/6# N Domestic Well -106 NS MW 447D MW-442'' ® NS a Irrigation Well MW-2 I NM Colombini 3 5 -22.08 22.62 MW-439(1-6) NS n• 1.5:90@ 2,250 THO Y -24.69 5 @ N Colombini 2 Colombini 3 16 @T 2,350 MW-448S NS NM NM CWS-62 MW-325 Well ID 2W0611 -22.54 9 @ 2.46# <0.2# Pumped 32,000 gallons -24.04 Groundwater Elevation Measured on # MW-449 S 2,550 4 1.96 Colombini 2 @ 889 GPM on # -22.42 2,62o July 16, 2012 in Feet Above Mean 3 2;550 N Colombini 1 d NM July 16,2012 Sea Level MW-210 W"302 2'6'^ MW-448D NM 3.11 # NS v 22.53 3.08# 5# 4 @ 7 Concentration of Hexavalent MW-209 MW-449 D MW 444 # O Z`Z;O� -22:41 1;960/1;970 -23.31 4 Chromium in Micrograms per Liter: tq ov� MW" 5,700 2,050/2,090 NS Colombi�l. 4.22/4.22 = Detections for Primary �4 Of M-6 5,7-1 - n W 467 5@-1 ? ?s SQ? MW-446 and Duplicate Samples MW-212 -M i MW-328 �� -21 89 � _1 - -22 63 � 26, -26.74 g Concentration of Total Dissolved 94.5# n ',I MW '22'50 -400 NS n, ? `, QQ` NS Chromium in Micrograms per Liter: 98/98# "V W-5 W-1 1 67 2S ` <3/<3 = Detections for Primary and Tw- I • sp -50 Duplicate Samples 5;0.00 .23 OO�MW-321 (1-9) MW-326 MW-426 ?g MW-10 ` 500 W: ' 14945 -23:04 -23:15NS NS - �QO �S•00 �? MW-1 MW MW-450 D�� 3�(b-1149 6@ 7@ MW-4361 I-5 24 SQ MW-431 #,# Sample Result from April 2012 ( ) -24.86 @,@ Sample Result prior to April 2012 1.42 � -23.05 iMW-324(I-10) � NS # 23.00=22.45 -23.59 I_ 3 Iwo 87 8 � . 1�11�-'fT MW-213(1-7) MW-3L MW-450 S.23.O0 _22.69 15.10# 8#10.0/1 Ch/9J�f ® MSI 6L6# NS Not Sampled 56106 72 14 438 3,880 440 18# -412( - 8 W-411 A Screened in the Shallow, 100-Foot 3. MW-424(I-2) MW-427_ I.3 IN LAIR ��- Sand, and Intermediate Zones 4,040)-3,980 21.27 (- $ MW-465 MW-434 S-6 NS ) -23.02 _24.47 © Pumping W211 FRANKLIN HIGH MW-461 (D 2) SCHOOL MW-322 # NS u� w �� 63NS p g -22.72 TRUD MW-425 6 <3# MW-429(I-4)�23.5 �_ / 6# / (-21.47 Anomalous Data/Not Contoured MW-4 23.4/23.2 MW-3 4 MW-430--23.63 \\// -22i31�MW-320 -22.94 22.72 3 MW- 2 MW-420 23.26 NS Q / 24/24 # _ 24 �? Contour of Equal Groundwater 981/1971 -22.55 MW-310 MW-325 NS 23.07 NS 3 0 9821982 <0.2 EW-1A - -2288 5" N2 @ NS 07 NS 9 @ %MW-433 �i Elevation <3 MW-323 -23.20 �7 82 7 @ 11 @ MW-410 M -464 ❑ ? -23.71 g - W3'18 /NS Direction of Groundwater Flow -22:56 MW-327 <0.2 ? -2318 5.53 -22:58 <3 Z2.S NS'_MW-435 _ 6 9 N@ 22 33 8�-lA) 8 0 CWS-20"' 7#�-23.43 �- MW-437 Isoconcentration Contour of MW;421 -23.42 6 NS -22.15 -23 07'� Did Not Pump On�� NS CWS-52 fJe� Hexavalent Chromium; # NS NS July 16,2012 2 7 u Did Not Pump On NS # <3 # 9 n Iv 22/4.22 @ ,3�OQ July 16,2012 7 17 Queried where Inferred; 1 11 1 IAN <'3/<3@ MW-432 NS Dashed where Approximate. -23.03 4@ NOTE: MW-4 and MW-212 ® 6S were Contoured using October 0 650 2011 Concentrations. Feet D U D E K FIGURE 3 SPX Cooling Technologies Groundwater Elevations and Chromium Concentrations in the Intermediate Zone in July 2012 3909-20 JULY 2012 Stockton,California