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MONITORING AND REPORTING PROGRAM ORDER NO. 5-00-056 -2- <br /> OWENS-BROCKWAY AND <br /> OWENS-ILLINOIS GLASS FURNACE FACILITY <br /> SAN JOAQUIN COUNTY <br /> Parameter Units Type of Measurement Inspection Frequency <br /> Sludge depth and scum thickness Feet Staff Gauge Quarterly <br /> in each compartment of each septic tank. <br /> Distance between bottom of scum Inches Staff gauge Quarterly <br /> layer and bottom of outlet device. <br /> Distance between top of sludge layer Inches Staff gauge Quarterly <br /> and bottom of outlet device. <br /> Septic tanks shall be pumped when any one of the following conditions exist or may occur before the <br /> next inspection: <br /> a. The combined thickness of sludge and scum exceeds one-third of the tank depth of the first <br /> compartment: or, <br /> b. The scum layer is within three inches of the outlet device; or, <br /> c. The sludge layer is within eight inches of the outlet device. <br /> In lieu of septic tank measuring, the septic tanks may be pumped quarterly. <br /> LEACHFIELD MONITORING <br /> Both domestic wastewater systems will be visually monitored. Leachfield monitoring will consist of <br /> visual inspection of the leachfield and nearby area. The leachfield and the area downslope of the <br /> leachfield shall be inspected on a monthly basis for the presence of vvet areas, leachate or groundwater <br /> seepage, objectionable odors, and/or unexpected plant growth. Leachfield monitoring results shall be <br /> included with all monthly monitoring reports. <br /> PROCESS WASTEWATER EVAPORATION/PERCOLATION PONDS <br /> Samples shall be collected from an established sampling station located in an area which will provide a <br /> sample representative of the wastewater in Pond No. 3, or the furthest downstream treatment pond in <br /> active use. Freeboard monitoring shall be performed at all ponds. Freeboard will be measured <br /> vertically from the surface of the pond water to the lowest elevation of the surrounding berm. Process <br /> wastewater pond monitoring shall include at least the following: <br /> Sample Sampling Reporting <br /> Constituent Units Type Frequency Frequency <br /> Dissolved Oxygen mg/1 Grab Monthly Monthly <br /> Flow Gallons Metered Continuous Monthly <br /> Freeboard Feet Measurement Monthly Monthly <br />