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TENTATIVE TIME SCHEDULE ORDER R5-2018-XXXX 2 <br /> OAKWOOD LAKE WATER DISTRICT <br /> WASTEWATER TREATMENT FACILITY <br /> SAN JOAQUIN COUNTY <br /> 6. The WWTF includes a sanitary sewer collection system, a wastewater treatment plant, <br /> and Land Application Areas. The wastewater treatment plant provides tertiary <br /> treatment using a sequential batch reactor (SBR) system, sand filters, and disinfection. <br /> The tertiary-treated wastewater is conveyed to three restricted-access storage ponds <br /> where it is then discharged to 17.5 acres of LAAs. Wastewater is discharged using drip <br /> and spray irrigation. The tertiary-treated recycled water is required to comply with <br /> California Code of Regulations, title 22 (Title 22), section 60301.230. <br /> VIOLATIONS OF WASTE DISCHARGE REQUIREMENTS <br /> 7. Since issuance of the 2006 WDRs, OLWD has a history of violations which have <br /> resulted in enforcement actions, including: <br /> a. On 28 August 2012. a Notice of Violation (NOV) was issued to the OLWD <br /> based on observations made during a 9 August 2012 site inspection conducted <br /> by Central Valley Water Board staff. A summary of the inspection findings <br /> included the following: <br /> [T]he WWTF is not operating as designed because raw sewage <br /> is bypassing the headworks/bar screen. Additionally, the WWTF <br /> reportedly does not have an adequate sized generator to <br /> operate the facility should a loss of power occur. Additional <br /> maintenance/repairs are needed to remove floating vegetation <br /> from the treatment and storage ponds and preclude public <br /> access to land application areas. Lastly, the wastewater <br /> treatment plant is not currently operated by a certified <br /> wastewater treatment operator and incomplete monitoring <br /> reports have been submitted. <br /> The 2012 NOV also noted several violations in the monitoring reports, including <br /> missing information, nonsubmittal of an annual monitoring report, and effluent <br /> limit exceedances. <br /> b. On 13 April 2017, another NOV was issued to the OLWD regarding its <br /> discharge of 2.5 million gallons of treated wastewater/recycled water to land <br /> application areas in violation of the WDRs, which provided that "Irrigation with <br /> recycled water shall not be performed within 24 hours of a forecasted storm, <br /> during or within 24 hours after any precipitation event, nor when the ground is <br /> saturated."Based on discussions with OLWD, the unauthorized discharges <br /> occurred when there was insufficient storage capacity in the WWTF wastewater <br /> ponds. Several factors resulted in capacity issues, including: prolonged storms <br /> beginning in January 2017, and continuing through February 2017, high <br /> volumes of infiltration and inflow into the sewer collection system, the WDRs <br /> prevented irrigation during rainfall events or oversaturated conditions; and high <br /> volumes of rainfall directly into the ponds during the month of February 2017. <br /> The lack of storage and treatment capacity has slowed the construction of new <br /> houses for the developer of the Oakwood Shores Subdivision. <br /> In response to the 2017 NOV, the OLWD submitted a Sanitary Sewer <br /> Collection System Inspection Report dated July 2017. The report identified <br />