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MW-441 <br /> n, -21.48 LEGEND <br /> NS <br /> 7' <br /> n0 Shallow Zone Monitor Well <br /> Location of Reductant Solution Injections J <br /> in September and October 2010 for the • Shallow Zone Extraction Well <br /> 0-. Full-Scale In Situ Remediation Program O 100-Foot Sand Zone Monitor Well <br /> Ll <br /> =40 to 180 ft bgs <br /> - 115 to 180 ft bgs 100-Foot Sand Zone Extraction Well <br /> N <br /> N 11Intermediate Zone Monitor Well <br /> AN I FC <br /> C`• ■ Intermediate Zone Extraction Well <br /> MW-2 ® Deep Zone Monitor Well <br /> 122.55 <br /> 19.8 Deep Zone Extraction Well <br /> cV - 20 MW-447 S <br /> N - cam. -23.29 o California Water Service Municipal Well <br /> 2,200 <br /> MW-211—®� MW-206 2'240 23.75 7 D ¢ ® Domestic Well <br /> 2.-21.94 OMW-302 2,580/2590 0 d Irrigation Well <br /> 3 W_2 �M 2,650/2620 <br /> MW-209 EW-4 EW-5 ---------DELMAR— MW-325 Well ID <br /> o L J -24.04 Groundwater Elevation Measured on <br /> MW-445 070 • O W-203 Jan. 17, 2012 in Feet Above Mean <br /> -22.45 M Sea Level <br /> EW- <br /> 91 _6 N7 Concentration of Hexavalent <br /> 9 ' .M* 0Mw-1 = - VVAUN Chromium in Micrograms per Liter: <br /> MW-214(I-8) ♦ 0 0 ? 520/521 = Detections for Primary <br /> -22.40 `r MW-101 W-400 and Duplicate Samples <br /> <0.2 w-5 Ow_., ,L�0� wW-467 6 8 8 Concentration of Total Dissolved <br /> 4 24.1M 2) • '' IV' NS Chromium in Micrograms per Liter: <br /> W-3 <br /> MW-212 MW-107 MW-448 S 7 19/19 = Detections for Primary and <br /> -22.37 MW- ♦ 8) ♦ -23.42 Duplicate Samples <br /> O ` <br /> 2370 <br /> 95353 ��MW-80 �' 2,400 Last Sampled in April 2010 <br /> MW ♦�♦ C i <br /> MW-448 D Last Sampled in April 2011 <br /> n' Sp' Sp0 •. MW =24.550 -24.50 <br /> MW-1 `� p — —2,800— Last Sampled in October 2011 <br /> -22.49 <br /> 2 7 01 ,� �!` 2,910 NS Not Sampled <br /> 4 08 M 363(D� W 5(S R�♦ �% .0 MW-324(1-10) A Screened in the Shallow, 100-Foot <br /> MW-213(1-7) ♦ ��� % -37.54 <br /> % '24.30 13.7 Sand, and Intermediate Zones <br /> 02288 +� ♦ _ MW-321_(1-9) U - BMW-326UUULIUUE <br /> , <br /> <3 -24.50 -40.91 -24.25 © Pumping Well <br /> 116 <br /> IM-300 120 N6 (-22.33) Anomalous Data/Not Contoured <br /> MW-4 O <br /> -23.18 3 9 EW-JA27 23 62)MW-303 -24'00 p0�? Contour of Equal Groundwater <br /> 5207521 (-24.37)—(-23 <br /> 443.62), MW-424(1-2) ?x"24 Elevation <br /> 521 /521' �`' <0.2 450/463 (-22.33) <br /> RANKLIN HIGH 3 NS Direction of Groundwater Flow <br /> SCHOOL MW-323 3 <br /> MW-320 -23.07 6 Isoconcentration Contour of <br /> 23.28 6.6/6.45 <br /> 4.08 7/7 O MW-325 /50 Hexavalent Chromium; <br /> 5 _ -24.04= - Queried where Inferred; <br /> MW-322 MW-425 - <br /> -24.17 24.01 Dashed where Approximate. <br /> GERTRUDE 15.7/15.8 NS NOTE: MW-4 and MW-212 were <br /> ❑ W-3 7 ? 16/16 M 1. <br /> 11 NS Contoured using October 2011 <br /> ® 0 350 <br /> NS N-304 _31b Concentrations. <br /> Feet 18' ADELBERT <br /> D U D E K Figure A-2 <br /> SPX Cooling Technologies Groundwater Elevations and Chromium Concentrations Beneath the North and South Yards in the Intermediate Zone in January 2012 <br /> 3909-20 <br /> JANUARY 2012 Stockton,California <br />