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MW-441 <br /> -18.55 LEGEND <br /> NS <br /> 7' <br /> 0 Shallow Zone Monitor Well <br /> ? Location of Reductant Solution Injections J • Shallow Zone Extraction Well <br /> p0 in September and October 2010 for the <br /> ,�°N' Full-Scale In Situ Remediation Program O 100-Foot Sand Zone Monitor Well <br /> LI <br /> n. =40 to 180 ft bgs <br /> - 115 to 180 ft bgs 100-Foot Sand Zone Extraction Well <br /> �O ❑ Intermediate Zone Monitor Well <br /> %gyp ■ Intermediate Zone Extraction Well <br /> / O <br /> MW-2 (D Deep Zone Monitor Well <br /> ?22.07 <br /> 7 15.9 le Deep Zone Extraction Well <br /> 16 MW-447 S <br /> QQ -22.94 o California Water Service Municipal Well <br /> 1,990 <br /> MW-211 �;✓� MW-302 MW-206 -21:50 2,160 23 49 7 D Q N Domestic Well <br /> 03 <br /> 1196 4 2,150 0 d Irrigation Well <br /> 3 EW-22,290-2200 ? <br /> MW-209 M-4 EW-5 . MW-325 Well ID <br /> MWO1o6 -23.32 Groundwater Elevation Measured on <br /> MW-445 MW-2070 • MW-203 ? April 23, 2012 in Feet Above Mean <br /> -21.79 n '22:50 Sea Level <br /> NS EW,3 <br /> 11 /11 � � MW"6 MW-1'05_ � 7.82 Concentration of Hexavalent <br /> ♦ % 102 Chromium in Micrograms per Liter: <br /> MW-214(1-8) <br /> 520/521 = Detections for Primary <br /> 21.85 • MW 328 and Duplicate Samples <br /> R, 50, �♦ M. -101 � -23:00 <br /> <0.2 lMW-5 p i��•• TW-,14 23.49 8 Concentration of Total Dissolved <br /> W-1,04..- 2)-*-%,,a TW-15 NS Chromium in Micrograms per Liter: <br /> MW-212 MW-107 500 3 MW-448 S -6/6 19/19 = Detections for Primary and <br /> -21.59 0 go,-11, -103 •��/-204(S-8) -23.11 Duplicate Samples <br /> 3 2,540 <br /> 98/98 -12 •%♦ • �2� 2,570 1 Last Sampled in April 2010 <br /> MW <br /> -24.00 MW-448 D Last Sampled in April 2011 <br /> •ter ."' MW-3u <br /> MW-1 '�` • p 2,3 00/2,350 ?4.00 <br /> N 4 Last Sampled in October 2011 <br /> -21.70 vw �, 2,460/2,440 ♦ S <br /> NS Not Sampled <br /> 1.42 ���. M;2400 v1 *�� ♦ MW-324 110 <br /> W-208 ( <br /> MSV 3e3�'�. " ) A Screened in the Shallow, 100-Foot <br /> MW-213(1-7) „! -37.28 Sand, and Intermediate Zones <br /> -22.88 t 15.1 <br /> UUMIJUE <br /> 5,120/5,130 _T_C- MW-321 (1-9) BMW-326 <br /> 5,410/5,170 -40.47 -23.34 © Pumping Well <br /> 0.43 <br /> 4 ss (-21.58) Anomalous Data/Not Contoured <br /> MW-4 J <br /> -23.13 EW-1A 1-11 MW-303 Contour of Equal Groundwater <br /> 5207521' _ 7) 507.7 508 / MW-424(1-2) ?i'23�� <br /> 720 -<<0.20.2 Elevation <br /> MVV <br /> FRA LIN HIGHn' <3 510/511 - 6� (-21.58) <br /> NS Direction of Groundwater Flow <br /> MW-320c ooL MW-323 <br /> -23.07 6 Isoconcentration Contour of <br /> 10 9 010.9 6%4 -23;50 /50� Hexavalent Chromium; <br /> 11/11 8 -MW=20 3. 325 Uut Queried where Inferred; <br /> MW-322 [7". <br /> 3.32 MW-425 <br /> -23.75 82 -23 29 Dashed where Approximate. <br /> cERTRUDE 17.4 NS NOTE: MW-4 and MW-212 were <br /> MW-327 20 M 310 5 ?3. Contoured using October 2011 <br /> 0 350 n NS 03 MW-304 -364 �� Concentrations. <br /> ® <br /> Feet 6 ADELBERT <br /> D U D E K Figure A-6 <br /> SPX Cooling Technologies Groundwater Elevations and Chromium Concentrations Beneath the North and South Yards in the Intermediate Zone in April 2012 <br /> 3909-20 <br /> APRIL 2012 Stockton,California <br />