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LK E/NFELOER MIN h14.Rlght Splutiom. A three-stage subsurface oil/water separator tank and aboveground filter unit were also installed near the northeast corner of the shop near a wash rack. The tank had an estimated capacity of 1,500 gallons. This system was installed to manage wastewater generated from washing trucks on the east side of the shop. Strip drains installed along the perimeter of the shop building and in the wash rack area were routed to two drop inlets located east of the wash rack. These two inlets are plumbed together and routed to the oil/water separator. Excess water at one time was pumped into an approximate 8,000-gallon trailer, which was not present during the 7 years of operations by Mr. Farmer. Mr. Farmer did indicate the oil/water separator was a closed loop system and that wastewater generated was re-used or disposed of offsite. Specific offsite waste disposal details were not recalled. Mr. Farmer commented that storm water is transported in a low-lying shallow swell area located along the eastern and southern property boundaries. The water trends south and west toward the southwest corner of Parcel 3, which then discharges into an offsite shared retention basin (on Parcel 2). Mr. Farmer commented that storm water catch basins on Parcel 3 are also routed to a large-diameter subsurface pipe trending north and south along the western boundary. This is a shared drain pipe with the Delta Truck Center and is routed beneath East Transportation Court with discharge into the north end of the offsite retention basin. Mr. Farmer indicated no transformers are located onsite and that the Parcel receives municipal water, but does not discharge to a municipal sanitary system. Schneider subsequently leased the property from 2003 to December of 2015. Schneider maintained their own trucks at the facility and had 30 to 40 mechanics. A fueling area, which included two 12,000 gallon diesel ASTs, fueling island with four dispenser's and canopy, was installed to fuel their trucks near the east-central portion of Parcel 3. Within 6-months of arriving, Schneider installed a permitted sewage package treatment plant that includes two tanks (estimated at 8,000 gallons each), and each with a 3-stage clarifier/system. This was installed to handle bathrooms, showers and a clothes washer located in the office area by Schneider. Excess water from the package tanks were pumped to a subsurface evaporative system with a liner to prevent infiltration. A control panel for this system was identified near the northwest corner of the main office building in near proximity to the tanks and evaporative field. A former septic tank installed by Mr. Farmer, located in the same area was reportedly used as a pump station for this package treatment system. Mr. Farmer indicated he had two leach lines that trended north from this former septic tank. It is unknown if the leach lines remain. Schneider did not wash trucks at the facility and did not use the oil/water separator installed by 20172543.001A/STO16R49461 Page 46 of 54 November 2, 2016 ©2016 Kleinfelder �Aleinfelder.com