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CaliforniaDegional Water Quality Cool Board ;
<br /> Central Valley Region
<br /> Karl E.Longley,SeD,P.E.,Chair '
<br /> Linda S.Adams Arnold
<br /> Eec11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114
<br /> Samna for Phone(916)464-3291 •FAX(916)464464 p (�ppp Schwarzenegger
<br /> Environmental REC HWED Governor
<br /> Protection http://www.wa[erboards.ca.gov/cenvalvalle v
<br /> Ms. Eugenia Valdez SEP 1 0 26%�eptember 2009
<br /> J&LMarket
<br /> 812 ENNONMEN T HEALTH8125 EI Dorado Street PERP,�IT/SERVICES
<br /> French Camp, CA 95231
<br /> DOCUMENT REVIEW, J&L MARKET, 8125 S. EL DORADO ST., FRENCH CAMP,
<br /> SAN JOAQUIN COUNTY, CASE NO. 390897
<br /> I reviewed the Pilot Testing Work Plan (Workplan), received 1 July 2009 from your consultant ATC
<br /> Associates, Inc. The Workplan proposes installation of two ozone sparge wells spaced 20' apart and
<br /> with screens at 35' below ground surface for a pilot test lasting 4 weeks, using a mobile ozone
<br /> generator. Each ozone well will alternate between receiving active ozone injection at 2 to 3 cubic feet
<br /> per minute.for a duration of 15 to 20 minutes per hour, with observation monitoring for water levels,
<br /> dissolved oxygen, oxidation-reduction potential, pH, temperature, and analyses of ozone injection
<br /> byproducts (total chromium, hexavalent chromium, and bromate). Nearby shallow monitoring wells
<br /> (JLM-3 and JLM-13) will also be sampled for petroleum hydrocarbons, including fuel oxygenates and
<br /> lead scavengers, from two to three times per week during pilot testing. A pilot study report will be
<br /> submitted 6 weeks after completion of field work.
<br /> The Workplan is approved with the following conditions:
<br /> • Each ozone well will be injected for a minimum of three days before switching to observation
<br /> mode,
<br /> • Sampling of wells JLM-3 and JLM-13 is to only be once a week during pilot testing, not two to
<br /> three times per week as proposed,
<br /> • Sampling for petroleum hydrocarbons, total chromium, hexavalent chromium, and bromate will
<br /> occur prior to startup of testing, immediately following completion of all testing, and once per
<br /> week during the pilot study,
<br /> • Sampling for the remaining field meter parameters will occur prior to startup of testing,
<br /> immediately following completion of all testing, and before and after each ozone well is used for
<br /> ozone injection during testing (once every three days), and
<br /> • A schedule with dates for the ozone pilot study is due 30 September 2009.
<br /> Semi-annual monitoring during the 3rd and 1st quarters, with status reports of work conducted during
<br /> the 2nd and 4h quarters, was approved by my 8 July 2009 letter. You may contact me regarding
<br /> questions by phone at (916) 464-4615; or for questions and status report submittals, by e-mail at
<br /> barton w terboards.ca. ov. (
<br /> �
<br /> `_ -A
<br /> ames L.L. Bart
<br /> Engineering Geologist
<br /> UST Enforcement Unit II
<br /> cc: Mr. Mark Owens, SWRCB, UST Cleanup Fund, Sacramento
<br /> Mr. Michael Infurna, San Joaquin County Environmental Health Department, Stockton
<br /> Mr. Todd Hafner, ATC Associates, Inc., Modesto
<br /> California Environmental Protection Agency
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