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Jeff Wong [EH] <br /> From: Jim Barton obarton@waterboards.ca.gov] <br /> Sent: Thursday, February 24, 2005 10:13 AM <br /> To: wlittle@advgeoenv.com; Jeff Wong [EH] <br /> Cc: Nuel Henderson [EH] <br /> Subject: Re: Ozone BST -West Clay Ppty-Stockton <br /> Bill, <br /> Please review the following comments: <br /> 1. Rename document as a Bench Scale Test and Pilot Study. They are not equivalent tests <br /> as the current title Bench Scale Pilot Study suggests. Note that approval to conduct an <br /> Ozone Injection Pilot Study is contingent upon the results of the Bench Scale Test. <br /> 2. Same for the analyses: Metals and General Minerals are separate tests. Metals are not a <br /> subset of General Minerals. <br /> Based on my review of a BST report received a few weeks ago: <br /> 3. Add breakdown products of the insitu chemical oxidation, including acetone, to the list <br /> of analyses. <br /> 4 . Use nitrogen sparging to assess whether volatilization or oxidation is reducing <br /> contaminant concentrations. <br /> 5. Calculate Soil Oxidant Demand (see guidance document at http: //www.itrcweb.org/ISCO- <br /> 2.pdf. <br /> 6. Use a spike water concentration of MtBE in untreated soil to calculate time for <br /> hexavalent chromium to break down to Cr3+. While 70 micrograms per Liter Cr6+ was <br /> produced by ozonation, the BST reported 190 micrograms per Liter Cr6+ was used for the <br /> break down test. <br /> 7 . Review the above-mentioned BST report. <br /> Also: <br /> 8. Review new guidance document for MtBE & TBA remediation. <br /> http: //www.itrcweb.org/MTBE-l.pdf <br /> 9. Contact me with questions. <br /> 10. If you incorporate these comments into the testing or review the recommended <br /> documents, then I concur with your proposal. <br /> Thanks. <br /> Jim <br /> >>> bill <wlittle@advgeoenv.com> 02/10/05 03:20PM >>> <br /> Jim Barton, as required by the San Joaquin County - environmental health <br /> department for the operation of in-situ ozone treatment system, and as <br /> directed by your regional board; the attached copy of the ozone bench scale <br /> pilot study has been forwarded for your approval to proceed. thanks for the <br /> consideration. william little <br /> Please note the email change: jbarton@waterboards.ca.gov. <br /> James L.L. Barton, P.G. ,( <br /> Engineering Geologist <br />