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Stockton Propeller, Inc. - 5 - 10 May 2022 Order R5-2022-0806 11.0n 18 August 2021 , the SJCEHD conducted a Site visit and confirmed SPI was no longer disposing hazardous waste to the on-Site septic system. SJCEHD issued a second Sewage Disposal Notice to Abate to document SPI's compliance (SJCEHD, 2021 e). 12.On 16 September 2021 , the SJCEHD referred the Site to the Central Valley Water Board for further investigation into potential illegal disposal of hazardous waste into the on-Site septic system and corresponding leach field and subsequent percolation to groundwater. 13.On 8 November 2021 , Central Valley Water Board staff issued an initial contact letter to the Chandlers, the Environmental Health and Safety Manager of VRC Metal Systems (VRC Metals),3 and Mike Belmont (Central Valley Water Board, 2021 a). The letter identified Central Valley Water Board staff's interest in overseeing the investigation and potential cleanup of the Site and requested enrollment in a Cost Recovery account. 14.On 18 November 2021 , Central Valley Water Board staff met with SPI and VRC Metals and requested a work plan and a sampling and analysis plan designed to investigate the potential impacts to the septic system, leach field soils, and groundwater. Consistent with his statements to the SJCEHD and DTSC, Mr. Belmont stated to Central Valley Water Board staff on 18 November 2021 that he estimates approximately five (5) gallons of SPI's wastewater was disposed of into the septic system per day since 2005 (approximately 16 years). SPI notified Central Valley Water Board staff that the septic tank was near capacity and required pumping but would continue to be evaluated over the next couple of weeks. 15.On 6 December 2021, Central Valley Water Board staff approved, through email, SPI's request to empty approximately 25 percent of the contents of the septic tank to allow extra time for SPI to submit a work plan/sampling and analysis plan (Central Valley Water Board, 2021 b). 16.On 22 December 2021 , Mr. Hrabe reported, through a letter addressed to the City of Stockton Municipal Utilities Department, several instances of potential unauthorized septic tank pumping (SPI, 2021). SPI had not yet pumped the approved 25 percent of the septic tank contents. The following are direct quotes from Mr. Hrabe's letter: a) 24 November 2021 : "an unknown waste-water company came onsite and may have pumped contents from the property's septic system..., as witnessed by my employees. We did not schedule this to be done." s At the time, VRC Metals was acting on behalf of SPI. Robert Hrabe is part owner of both VRC Metal Systems and SPI.