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MUSCO FAMILY OLIVE COMPANY AND THE STUDLEY COMPANY _4- WASTEWATER TREATMENT AND LAND DISPOSAL FACILITY SAN JOAQUIN COUNTY INSPECTION REPORT At this point, Regional Board staff requested a schematic of the irrigation piping system and all flow meters. Ms. Wyels asked about measurement of irrigation flows to the fields and reminded Musco staff of the requirement in Monitoring and F Reporting Program No. R5-2002-0148 to meter flows to application areas. Musco staff confirmed that flows to fields ` a are not metered; instead, flows are estimated based on the number of sprinkler heads, duration of irrigation, and flow rating. Musco staff stated that the Evaporation East field is no longer Figure 7—Standing Water in Evap South being irrigatedaced and will not be planted with N yPa Forage. A "mud box" had been installed in the Evaporation West Standing water field (Figure 8) and contained standing water, and no pump, during the inspection. Flies were collected around the standing water. Grading of the field did not allow for proper drainage into the box. Standing water at the top end of the field as well indicated poor water management. Regional _ Board staff observed poor to minimal plant growth in this field. Following a brief lunch break, the inspection resumed near the 95-Acre field. Tailwater from this field is routed under a railroad culvert, then through a ditch into a mud box at the Figure 8—Field Evaporation West edge of the eucalyptus grove where it is combined with tailwater from field 55 East. The mud box, which Musco staff stated was installed in May 2006, was nearly filled with sediment. Tailwater was being pumped into the eucalyptus tree area, where muddy, standing wastewater was observed. Mr. Del Frate noted that he had observed standing wastewater in this area during his March 2006 site visit. The standing wastewater here also appeared to be 4 �� p A fermenting, with occasional bubbles rising to the surface and flies congregating around the'perimeter (Figure 9). Musca staff stated that a sump pump ` r had been installed for this area. Ms. Wyels reminded Mr. Hall of Land Application Areas Specification D.15 in the WDRs, which requires that there be no standing water in the land application areas 24 hours after wastewater is x . w applied, and informed him that this area needed to Flies be cleaned up. Musco staff disagreed with Regional Board staff's assessment that the muddy wastewater was in fact standing water. Figure 9—Flies on Silty,Standing Water in Eucalyptus Grove Near S5 East and 95-Acre Fields