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Harlin Knoll [EH] <br /> From : Jim Barton [jbarton@waterboards.ca.gov] <br /> Sent: Thursday, March 13, 2008 11 :28 AM <br /> To: Harlin Knoll [EH] <br /> Subject: Fwd : Workplan for Ozone Bench Scale Study, 8606 Thornton Rd ,Stockton <br /> OK Harlin , here it is . Thanks . <br /> > > > Jim Barton 3 / 5 / 2008 10 : 10 AM > > > <br /> Hi Harlin , <br /> I conducted a preliminary review of the 3 March 2008 document from Secor , which is <br /> addressed to me for approval and cc ' d to you . I noticed that it also includes a scope <br /> of work for installation of an ozone sparge well and field procedures for the well <br /> installation . The reason given for constructing the single ozone sparge well now is to <br /> collect soil and groundwater samples for the bench scale test . Water samples will be <br /> collected through the auger using a bailer . Once the bench scale test is complete , they <br /> will decide whether to install four additional ozone sparge wells . Seems to me that , if <br /> they use an existing monitoring well to get a cleaner water sample and collect soil only <br /> from a direct push boring , the cost will be less and the sample will be adequate for the <br /> bench scale test . What do you think? <br /> Please advise how you want to handle this workplan , my comments in my letter on the bench <br /> scale test portion only , recommending they use a monitoring well for the water sample and <br /> a direct push boring for the soil sample , and deferring the one well installation ( call <br /> it a pilot study? ) approval to you . Or do you want to incorporate my comments in your <br /> letter and tell Secor to wait for the results of the bench scale test before installing <br /> the well ? <br /> Thanks . <br /> Jim <br /> James L . L . Barton , P . G . <br /> Engineering Geologist <br /> California Regional Water Quality Control Board Central Valley Region , 11020 Sun Center <br /> Drive , Suite 200 , Rancho Cordova , CA 95670 office ( 916 ) 464 - 4615 <br /> fax ( 916 ) 464 - 4704 <br /> 1 <br />