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RE'\ E V EV <br />JUN 2 3 2009 <br />ENVIRONMENT HEALTH <br />Ms. Vicki McCartney PERMIT/SERVICES <br />Senior REHS <br />San Joaquin County Environmental Health Department <br />600 East Main Street <br />Stockton, California 95202-3029 <br />(209)468-9852 <br />Dear Ms. McCartney: <br />Subject: Groundwater Monitoring Reduction Request <br />Earthgrains Baking Companies, Inc. <br />(Former Rainbo Baking Company) <br />2651 South Airport Way <br />Stockton, California 95206 <br />Reference: Facility Site Code: 19093 <br />June 18, 2009 <br />Project: 62400145 <br />On behalf of Sara Lee Bakery Group, Inc. (Sara Lee), PSC Industrial Outsourcing, LP <br />(PSC) is submitting this request for a reduction in the requirements for the groundwater - <br />monitoring program for the above referenced project site. Groundwater monitoring has <br />been conducted at the site since 1987. Twenty-two years of data is sufficient to assess <br />trends in the contaminant plume and to monitor the migration. The request is based on <br />the approved State Water Resources Control Board resolution on May 19, 2009. <br />v The current monitoring program is quarterly with some wells being monitored on an <br />annual basis as indicated on the attached Table 1, Current Groundwater -Monitoring <br />Program. PSC recommends the current quarterly groundwater monitoring be revised to <br />an annual program. Sampling events would be reduced to an.annual basis to occur in the 4 <br />second quarter of each subsequent year until final site closure has been granted. In <br />addition , PSC recommends that the annual monitoring events only include wells MW -1; MVJ <br />MW-7,-12,SP-1, SP-2,IPZ-1 and PZ-2'The 14 additional wells on site routinely' �r�l `�2 <br />report no detectable concentrations. Well MW -12' is_ the downgradient well used to ^ <br />monitor potential migration of the contaminant plume. 'The oxygenates MTBE, ETBE, <br />TAME and TBA would also be reduced from the monitoring program, since they have <br />historically been non -detect. The reduced groundwater -monitoring program would be as <br />indicated on the attached Table 2, Proposed Groundwater -Monitoring Program. <br />PSC INDUSTRIAL OUTSOURCING, LP. <br />210 West Sand Bank Road, Columbia, IL 62236 <br />(618)281-1543 Fax(618)281-7020 <br />