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Pagel of 3 <br /> Angelica Sandoval Marin [EH] <br /> From : Angelica Sandoval Marin [EH] <br /> Sent: Thursday, March 13, 2014 4: 18 PM <br /> To : Nuel Henderson [EH] <br /> Subject: FW: 2575 Country Club Blvd, Stockton , CA Shell Oil Co. <br /> Attachments: 240783- TABLE 1 SOIL DATA. pdf; 240783-TABLE 2 GW DATA. pdf; 240783-TABLE 3 <br /> 1; ESTIMATED MASS IN SOIL . pdf; 240783-TABLE 4 ESTIMATE MASS in GW. pdf, 240783-Time to <br />{I Reach WQOs. PDF; 240783-MAR1001 -figs 1 -9-Mar05-2014. pdf <br /> Nuel, <br /> Could your review this data and determine if we it closer to closure. <br /> Thanks <br /> Angelica <br /> From: Silva, Larry [mailto : lsilva@craworld .com] <br /> Sent: Thursday, March 06, 2014 12 : 16 PM <br /> To: Angelica Sandoval Marin [EH] <br /> Cc: Silva, Larry <br /> Subject: RE: 2575 Country Club Blvd, Stockton, CA Shell Oil Co. <br /> j Angelica, <br /> Please find attached the time to reach water quality objective (WQO) calculations and the residual mass in soil <br /> and groundwater calculations that were prepared for the subject site. <br /> CRA prepared time to reach WOO calculations for wells MW-5r, MW-7, MW-8, MW-15, MW-17, MW-18, and <br /> RW-1A. If a constituent of concern (COC) in a well was below its respective water quality objective (WQO) for at <br /> least the last four consecutive sampling events then CRA did not prepare time to reach WQO calculations for it. <br /> The exception was for MTBE in wells MW-8, MW-9, and MW45 and benzene in well MW-15, where the CDCs <br /> during the last four sampling events were overall lower than WQOs. <br /> The COC mass remaining in soil and groundwater were calculated using the contours presented in Fig fifes 1 <br /> through 6 and Figures 7 through 9, respectively. 1 <br /> Here's a list of documents included in this email. <br /> • Table 1 : Soil Analytical Data ( � - <br /> • Table 2 : Groundwater Analytical Data - <br /> • Table 3 : Estimated Mass Remaining in Soil <br /> • Table 4: Estimate Mass Remaining in Groundwater <br /> • Graphs: Time to Reach Water Quality Objectives <br /> • Figure 1-6: COCs in Soil Isoconcentration Contour Maps <br /> • Figure 7-9 : COC Isoconcentration Contour Maps <br /> Please let me know if you have any questions. <br /> Thank you, <br /> Larry <br /> 3/13/2014 <br />