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MW-17A <br /> -(0.139) <br /> Ca��/@off <br /> �a 7t <br /> ov, tAW-16A <br /> Ftp <br /> (0.015) ,- <br /> as 1 <br /> .._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._.._ _ .._.._.._.._.._....._.._... .. _ .. c. _.._.._.._.. �_.._.._ .�.._.._.._. <br /> \ ryOn C <br /> / MW-3A \ �� <br /> �cT (0.087) <br /> • MW-13A <br /> .�..�..�..�• (0.059) N MW-15A& > �� <br /> (0.037) <br /> A/C Paved Parking Area Station House <br /> Ill <br /> (0.029) 9 <br /> A/C Paved Road AIC Paved Road <br /> MWSA 9 Ml B MW-14A <br /> (0.070) (0.002) (0.005) <br /> s�. MW-10A&= 9 <br /> ya (0.001) <br /> • RSV <br /> �� MW-4A <br /> (0.162) MW-7A ne MW-22A <br /> 3 MW-2A (0.002) se <br /> (0.000 {000iA •�•��•••^.._. LEGEND <br /> Fuel Tanks MW-12A •• <br /> �• <br /> Communications _ _ _ (0.013 •.� ..0..000 <br /> �• EWP1 Extraction Well <br /> Facility <br /> � �J J^ – `�\ o� �..�'••� Icw-t * Infiltration Gallery Well <br /> TPCAPo ♦ MIN-8A �' ••_..�•� MW-2A t9 <br /> r ExCAP t (0.008)s A-Zone Monitoring Well Location <br /> i ,_ '�•�.••�•• MW-M$ B-Zone Monitoring Well Location <br /> _ _ .—••—•• Mw-1c® C-Zone Monitoring Well Location <br /> �MWAA .•'.•i• ® GAC Vessels <br /> led (0.065) •.I <br /> •-•• Building <br /> �..�• NOTES: <br /> •�•• 1. See Table 5-4 for Summary Ground Water Analytical Results Road or Paved Area <br /> Scor Ied •, for Hexavalent Chromium(Cr-6). <br /> Sal �.•� 2. Chromium VI analyzed by EPA Method 7196. �••�••� SPTCo Property Boundary <br /> 3. The geometric mean concentration for each constituent was calculated — Existing Fence <br /> using all quarterly sampling analytical results. When there was no detection V <br /> above the method detection limit,the geometric mean of one half of the lowest i f ; Railroad Tracks <br /> detection limit for all of the quarterly analytical data for that constituent was <br /> used in the computation of the geometric mean concentration. _ _ _ _ _ _ Limits of Impoundment Excavation <br /> ' p 4. Isoconcentration contours are drawn based on actual data collected from <br /> • o= the monitoring wells. Contours between monitoring wells are based on W.S.I.D. Irrigation Canal (Buried) <br /> interpolation between monitoring wells and actual concentrations between <br /> ;• �� Contour Interval wells may differ from those infered. [ Infiltration Gallery <br /> • (fr9�) <br /> 0.01�' Figu re: <br /> • Industrial Compliance ISOCONC ENT RATION MAP OF <br /> / �-0.10�� GEOMETRIC MEAN CONCENTRATION <br /> Environmental S} 5_g <br /> j ASubsilry Systst sPems,Inc. HEXAVALENT CHROMIUM IN A-ZONE GROUNDWATER PageNo.: <br /> MW-21A: Approximate SOUTHERN PACIFIC TRANSPORTATION COMPANY <br /> / Project No.: 05100254 Dale. 03/22/94 TRACY YARD <br /> I o 120 Dra n �� TRACY, CALIFORNIA <br /> Patti Decker a Mike Purcell as shown <br /> Trcy-2WRI.0394/F.6-8#106 <br />