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r MUSCO FAMILY OLIVE COMPANY AND THE STUDLEY COMPANY -6- WASTEWATER TREATMENT AND LAND DISPOSAL FACILITY SAN JOAQUIN COUNTY INSPECTION REPORT The final land application area to be inspected was the South Ridge field. With the exception of the lower portion of the field near the sump, growth of NyPa Forage on this field appeared to be vigorous (Figure 13). Musco staff stated that they would like to send harvested NyPa Forage to a dairy for fodder, but do not yet have a contract in place. Standing water with flies was observed in the sump (Figure 14). The heavily crusted soil in the flat area near the sump Flies indicated that it NyPa Forage had previously been part of a large ponded area. Odors were noted Figure 1.3--,South Ride between the g g tank farm and the South Ridge field. Wind direction at this time was toward the Harpainter property to the east. Figure 14—Flies at South Ridge Sump On 27 October and 3 November 2006, Musco submitted updates to Regional Board staff(via electronic mail) regarding recent improvements to the tailwater control system. Improvements made as of the most recent update included installation of mud boxes in fields 18 North, Evaporation South,North Spur; Park West South Ridge East and the lower onion of 55 East; installation and wiringof Christ boxes West, � P , Y for all mud boxes except for South Ridge East; improvements to the discharge plumbing for the mud boxes; electrical work on the eucalyptus grove mud box pump; and completion of a tailwater ditch for the western portion of the South Ridge field. The updates also described erosion control work, including consultation with an erosion control firm. SUMMARY: As described above, Regional Board staff observed standing, and sometimes fermenting, water in sumps, tailwater return ditches, and erosion rills at various land application areas/land treatment units throughout the site. Large numbers of flies were observed clustered about the edges of several sumps and the eucalyptus grove. Tailwater conveyance, storage, and return systems functioned poorly and were inadequate to allow for proper drainage of the fields. Given assertions by Musco staff that no wastewater had been applied for two to three days prior to the inspection, it appears that applied irrigation water did not infiltrate completely within 24 hours. While a grass crop (NyPa Forage) has been planted on two-ft centers on the application areas, the grass does not appear to be actively growing on many of the fields receiving wastewater. These are violations of the following requirements contained in WDRs Order No. RS-2002-0148: Discharge Prohibition A.7, which prohibits the "[l]and application of wastewater to any LTU [land treatment unit] not having a fully functional tailwater/runoff control system." Discharge Specification 13.6, which prohibits the "discharge to conveyance systems, settling basins, ponds, or land application areas not adequately maintained to prevent off-site odor