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MW-441 <br /> MW-401 -22.26 LEGEND <br /> NS <br /> <3 @ <br /> O Shallow Zone Monitor Well <br /> Location of Reductant Solution Injections • Shallow Zone Extraction Well <br /> in September and October 2010 for the <br /> Full-Scale In Situ Remediation Program O 100-Foot Sand Zone Monitor Well <br /> =40 to 180 ft bgs <br /> 0 = 115 to 180 ft bgs * 100-Foot Sand Zone Extraction Well <br /> � = 115 to 180 ft bgs (in July/August 2012) 11 Intermediate Zone Monitor Well <br /> ■ Intermediate Zone Extraction Well <br /> =40 to 180 ft bgs (in July/August 2012) <br /> MW-2 ® Deep Zone Monitor Well <br /> 22.03 <br /> 21.2 Deep Zone Extraction Well <br /> 22 MW-447 S <br /> ,^'„ -22.08 o California Water Service Municipal Well <br /> 590 <br /> MW-211MW-210 590 N Domestic Well <br /> MW-206 MW-447 D <br /> 22.77 -22.09 <br /> 1.96 @) OM 302 MW-44X9 D 1,620 a Irrigation Well <br /> 3 W-2 -22.14 1,630 <br /> MW-209 EW-4 EW- 7,490 <br /> 0 -06 71500 MW-325 Well ID <br /> O MW-449 S -21.88 Groundwater Elevation Measured on <br /> -22.35 07O • MW-203 Jan.23, 2013 in Feet Above Mean <br /> -22.35 -22.17 <br /> NS EW 1,740 Sea Level <br /> 11 /11 @ *__W1*102 M 6 OMW-1 - - 1770 7.82 Concentration of Hexavalent <br /> MW-214(I-8) / 1 • • Chromium in Micrograms per Liter: <br /> -22.33 ♦ % MW-101 0 __ 520/521 = Detections for Primary <br /> <0.2 W-5'$0�,0 0 MW-461 Q MW-328 <br /> 0 - -22.08 ? and Duplicate Samples <br /> w TW-15 NS ? 8 Concentration of Total Dissolved <br /> • --6-16 6 �°° <br /> MW-212 MW-107 MW-448 S Chromium in Micrograms per Liter: <br /> -22 07 0 ♦ 1�va(S-8) _21.99 ��, 19/19 = Detections for Primary and <br /> 94.5" % • � • •• • 2,440 fir, v� Duplicate Samples <br /> 98/98 @ MW <br /> MW-7 TW-12 �` MW-80 SOOO ' 2,450 �� �� ?> O0 cS <br /> =__ "Soo" ` MW-_ MW-448 D crO ` #,# Sample Result from October 2012 <br /> • ! S -22.05 <br /> $ . , - @@ Sample Result prior to October 2012 <br /> MW-1 1;460 "22.25 <br /> -22.03 1,470 <br /> 1.42 @ '22'25 ��� • !` ; NS Not Sampled <br /> <3 MW_20 MW-36 `) MW- ?�S �� �� MW-324(1-10) A Screened in the Shallow, 100-Foot <br /> MW-213(1-7) M -450 D I -36.46 <br /> Sand, and Intermediate Zones <br /> 2,450 X21.85 t: 7�-44.80 =(I;9) - 17 0 $MW-326 © Pumping Well <br /> 16.6 -44.80 <br /> 2,460 100 <0.21<0.2 -22.31 <br /> MW-300 MW-450 S <3/<3 6,@ (-22.33) Anomalous Data/Not Contoured <br /> MW-4 O -22.05 I-11 <br /> -22.14 4,700 MW EW-1 -61.140 <br /> 11MW-303 S-6 �? Contour of Equal Groundwater <br /> 1,05071;070 X4;800 (22.49) 346 1� 4' MW-424(1-2) �i 22 p0 Elevation <br /> 1,060/1,080 -<0.2 <br /> MW-320 �OLN HIGH MW-323 O� 4 360 NS.56) Direction of Groundwater Flow <br /> 4 @ <br /> -22.33 6.64 / Isoconcentration Contour of <br /> 6.64 <br /> 41:0 8/7 O MW-325 /50 Total Chromium; <br /> 41 2ul (-364 <br /> .88 3 MW-425 Queried where Inferred; <br /> MW <br /> -22.10 2 @ -22 19 Dashed where <br /> -22.1 o Approximate. <br /> DE MW-327 15.7 M -5@ <br /> -22.15 MW-304 '22 00 <br /> ® 0 350 NS <br /> Feet 6 @ <br /> DU DE K Figure 2 <br /> SPX Cooling Technologies Groundwater Elevations and Chromium Concentrations Beneath the North and South Yards in the Intermediate Zone in January 2013 <br /> 3909-20 <br /> AUGUST 2013 Stockton,California <br />