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S
<br />LAURA ANDREW EP 2 4 2004
<br />SARA LEE BAKING GROUP
<br />8400 MARYLAND AVE
<br />ST LOUIS MO 63105-3668
<br />SITE CODE 19093
<br />RE: The Earthgrains Company Facility RO: 0431
<br />2651 South Airport Way
<br />Stockton, California 95206
<br />San Joaquin County Environmental Health Department (EHD)
<br />asSeviewed Corpe(2004
<br />Site Investigation Report dated August 9, 2004, prepared EY
<br />on your behalf for the above -referenced site. In this report, PSC discusses the results
<br />from the site investigation conducted in June 2004 that involved advancement of four
<br />boreholes to approximately 35 feet below surface grade (bsg), three boreholes to
<br />approximately 100 feet bsg, and sampling of two domestic wells located on an adjacent
<br />property. PSC also discusses the analytical results for groundwater samples collected on
<br />June 21 and 24, 2004 during the quarterly groundwater -monitoring event. Based on these
<br />findings, PSC proposes a reduction in the number of monitoring wells sampled during the
<br />quarterly groundwater monitoring events. PSC also requests that 1,2-dibromoethane
<br />(EDB) be omitted from the analyte list of compounds being tested quarterly in the
<br />groundwater -monitoring program.
<br />EHD approves removal of EDB from the analytical list of compounds tested each quarter
<br />since non -detect results for EDB have been reported for every soil and groundwater
<br />sample during the June 2004 site investigation and groundwater monitoring event. EHD
<br />also approves moving monitoring wells MW -2, MW -3, MW -4, MW -6, MW -9, and MW -
<br />13 from the quarterly to the annual groundwater -monitoring program as annual
<br />monitoring of these wells appears to be adequate to track the plume. However, please do
<br />not exclude these wells from having the water level measurements documented each
<br />quarter for the purpose of determining the groundwater gradient.
<br />To remain in compliance with regulatory requirements, EHD directs you to continue
<br />quarterly groundwater monitoring in accordance with Section 2652 (d) of the California
<br />Code of Regulations, Title 23, Division 3, Chapter 16. Notify Vicki McCartney of EHD
<br />at least forty-eight hours prior to any fieldwork and please include a copy of the original
<br />field data sheets in the quarterly reports. EHD also recommends that you take total depth
<br />measurements for each well during the sampling events and include this data in the
<br />quarterly reports to demonstrate that the wells are properly developed and are yielding
<br />valid data.
<br />HEALTH DEPARTMENT
<br />ENVIRONMENTAL
<br />SAN JOAQUIN COUNTY
<br />Unit Supervisors
<br />K. Heran, R.E.H.S.
<br />304 East Weber Avenue, Third Floor
<br />Carl Borgman, R.E.H.S.
<br />Mike Huggins, R.E.H.S, R.D.I.
<br />c: <
<br />Donna
<br />DirectorStockton,
<br />R.E.H.S.
<br />California 95202-2708
<br />Douglas W. Wilson, R.E.H.S..
<br />Margaret Lagorio, R.E.H.S.
<br />• - - -
<br />. P.
<br />Al Olsen,
<br />program Manager
<br />Telephone: (209) 468-3420
<br />Robert McClellon, R.E.H. S.
<br />c4�iFOR`'�
<br />Laurie A. Cotulla, R.E.H.S.
<br />Fax: (209) 464-01.38
<br />Mark Barcellos, R.E.H.S.
<br />program Manager
<br />-
<br />S
<br />LAURA ANDREW EP 2 4 2004
<br />SARA LEE BAKING GROUP
<br />8400 MARYLAND AVE
<br />ST LOUIS MO 63105-3668
<br />SITE CODE 19093
<br />RE: The Earthgrains Company Facility RO: 0431
<br />2651 South Airport Way
<br />Stockton, California 95206
<br />San Joaquin County Environmental Health Department (EHD)
<br />asSeviewed Corpe(2004
<br />Site Investigation Report dated August 9, 2004, prepared EY
<br />on your behalf for the above -referenced site. In this report, PSC discusses the results
<br />from the site investigation conducted in June 2004 that involved advancement of four
<br />boreholes to approximately 35 feet below surface grade (bsg), three boreholes to
<br />approximately 100 feet bsg, and sampling of two domestic wells located on an adjacent
<br />property. PSC also discusses the analytical results for groundwater samples collected on
<br />June 21 and 24, 2004 during the quarterly groundwater -monitoring event. Based on these
<br />findings, PSC proposes a reduction in the number of monitoring wells sampled during the
<br />quarterly groundwater monitoring events. PSC also requests that 1,2-dibromoethane
<br />(EDB) be omitted from the analyte list of compounds being tested quarterly in the
<br />groundwater -monitoring program.
<br />EHD approves removal of EDB from the analytical list of compounds tested each quarter
<br />since non -detect results for EDB have been reported for every soil and groundwater
<br />sample during the June 2004 site investigation and groundwater monitoring event. EHD
<br />also approves moving monitoring wells MW -2, MW -3, MW -4, MW -6, MW -9, and MW -
<br />13 from the quarterly to the annual groundwater -monitoring program as annual
<br />monitoring of these wells appears to be adequate to track the plume. However, please do
<br />not exclude these wells from having the water level measurements documented each
<br />quarter for the purpose of determining the groundwater gradient.
<br />To remain in compliance with regulatory requirements, EHD directs you to continue
<br />quarterly groundwater monitoring in accordance with Section 2652 (d) of the California
<br />Code of Regulations, Title 23, Division 3, Chapter 16. Notify Vicki McCartney of EHD
<br />at least forty-eight hours prior to any fieldwork and please include a copy of the original
<br />field data sheets in the quarterly reports. EHD also recommends that you take total depth
<br />measurements for each well during the sampling events and include this data in the
<br />quarterly reports to demonstrate that the wells are properly developed and are yielding
<br />valid data.
<br />
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