SITE INFORMATION AND CORRESPONDENCE

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City of Escalon 3 24 September 2014 San Joaquin County apparently stopped the seep by placing several yards of soil and bentonite clay on the inner pond berm. At 11:13 p.m. Mr. McCoy submitted a spill report (via e-mail) describing when the spill was identified, the City's notification to appropriate regulatory agencies, an estimated flow rate and the corrective actions that the City had taken to stop the spill. According to the report, the leak re-occurred sometime after 5:30 and the City was able to stop the leak at approximately 9:30 p.m. after placing approximately 50 cubic yards of soil and bentonite clay on the inner berm of Pond 12. On Thursday, 18 September 2014, at approximately 10:15 am the wastewater treatment plant operator informed staff that no additional seepage was occurring from the east berm of pond 12 and the discharge into pond 12 was ceased by closing the discharge valve. On Monday, 22 September 2014, the wastewater treatment plant operator informed staff that discharges into pond 12 resumed on Sunday for approximately six hours. No seepage from the berm was observed during subsequent inspections of the pond berm. The discharge of industrial wastewater to the Stanislaus River is a violation of Prohibitions A.1 and A.2 of Order 5-00-142, which state, "Discharge of wastes to surface water drainage courses is prohibited."and "Bypass or overflow of untreated or partially treated waste is prohibited." Odors: The Regional Board previously adopted Cease and Desist Order R5-2003-0124, which addressed odor complaints associated with the discharge of industrial wastewater to the Escalon WWTF. The CDO required implementation of pretreatment programs and seasonal start up procedures. Additionally, the CDO required the City to enhance treatment and disposal capacity at the WWTF. After completion of the facility improvements, the CDO was rescinded in December 2011. Beginning on 5 August 2014, Regional Board staff began receiving odor complaints from residences, located in the Del Rio subdivision, approximately one half mile south of the Escalon WWTF. Regional Board staff notified the City of the complaints and requested that the City review their monitoring data and see if there were any operational issues at the WWTF. City staff responded that there were no operational issues at the WWTF. On 22 September 2014, San Joaquin Valley Air Pollution Control District staff contacted Regional Board staff and stated that on September 19th, 20th and 21St, air district staff responded to residences in the Del Rio subdivision and confirmed the presence of odors associated with Escalon's WWTF. The presence of odors associated with wastewater from the WWTF in the Del Rio subdivision is a violation of Discharge Specification B.6 of Order 5-00-142, which states "Objectionable odors originating at this facility shall not be perceivable beyond the limits of the wastewater treatment facility." Violation Summary: The failure to maintain adequate pond vegetation control to prevent nuisance conditions, pond freeboard to prevent bypass, and the overflow of wastewater to adjacent wastewater ponds and