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` Page 1 of 3 <br /> Lori Duncan [EH] <br /> From: Lori Duncan [EH] <br /> Sent: Wednesday,August 04, 2010 8:28 AM <br /> To: 'Neely, Joe'; 'denis.l.brown@shell.com' <br /> Cc: Nuel Henderson [EH]; 'Jim Barton' <br /> Subject: RE: 240854 -Shell site-6131 Pacific Ave, Stockton-COR-240854- <br /> Joe, <br /> It is up to the consultant to propose a remedial method. If you want to change your proposal,then submit a new <br /> proposal. I can't be making suggestions as to what method to use. <br /> Any work you do related to obtaining a general permit for waste discharge from the regional board should be <br /> discussed with or approved by them. Whether these results mean you can or cannot use sodium persulfate at this <br /> site would be up to them. I'm not a chemist, and I can't comment on them. <br /> You should verify with the regional board whether a bench scale test is required for the injection <br /> method/substance you decide on, if you are still planning on proposing some type of injection. They are not <br /> requiring them for everything now, at least that is my understanding, especially if you have a similar site/situation <br /> that you can compare to. <br /> Thanks, <br /> Lori Duncan, Senior REHS <br /> San Joaquin County <br /> Environmental Health Department <br /> Iduncan@sjcehd.com <br /> (209)468-0337 phone <br /> (209)468-3433 fax <br /> From: Neely, Joe [mailto:jneely@craworld.com] <br /> Sent: Tuesday, August 03, 2010 5:32 PM <br /> To: Lori Duncan [EH] <br /> Cc: Project Email Hold <br /> Subject: 240854 - Shell site- 6131 Pacific Ave, Stockton-COR-240854- <br /> Lori: <br /> tockton-COR-240854Lori: <br /> There is a new development at this site that I wanted to discuss with you as it affects our plans <br /> for remediation at the site. <br /> We recently performed a special groundwater sampling event where we collected groundwater <br /> samples and tested them for metals and cations. The results came back (lab data attached) and <br /> we found that we have naturally elevated levels of Sodium, Manganese, Aluminum, and Iron that <br /> exceed the water quality goal. We did this analysis to help determine if in-situ chemical oxidation <br /> (ISCO) is a viable remedial alternative for the site-based on a recent experience at another <br /> Stockton site. <br /> Currently, we are in the process of evaluating ISCO for one of Mike Infurna's sites (2575 Country <br /> Club) and we found elevated Sodium levels (well above the water quality goal) at this site. Our <br /> 8/4/2010 <br />