аЯрЁБс>ўџ .0ўџџџ-џџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџьЅС#` №Пєbjbj\.\. .>D>DєџџџџџџЄттттттті & іН Ж>>>>>>>>< > > > > > > $shлТb т >>  b тт>>w ” ” ”  ‚т>т>< ”  < ” ” М тт >2 `§ТаxљЧ˜ .д <  0Н м ,Ц И т 4>LŠ6” Р,ь*>>>b b ~ >>>Н     ііі$ііііііттттттџџџџ California Regional Water Quality Control Board North Coast Region Interoffice Communication DATE: September 17, 2007 TO: John Short SUBJECT: Inspection of Forestville Water District Wastewater Treatment Facility (WDID No. 1B83100OSON) On July 25, 2007, beginning at 9:30 a.m., I inspected the subject facility accompanied by the George Roberts, General Manager. I inspected the wastewater treatment plant and the Crinella Vineyard, a recycled water user. Inspection The treatment plant and laboratory are clean and well-maintained. George runs pH and chlorine residual tests in the lab and sends all other samples to Brelje and Race for analysis. We discussed the issue of calibrating the flow meter, turbidity meters in the microfiltration plant, and chlorine residual meter. George has not calibrated the flow meter since Forestville Water District took over responsibility for the plant. I explained to him that this should be done annually. Headworks. There were no odors at the headworks. Influent flows ranged between 125 and 160 gallons per minute (while we were at the headworks) and George reported that the morning low was 58 gpm. The bar screens were operational but not running while we were at the headworks. Treatment. George reported that he has been challenged to keep BOD levels below permit limits. He has tried various methods of improving plant performance, including recirculating wastewater to increase the detention time in the ponds and running the aerators on the first pond 24 hours per day. He used to shut the aerators off intermittently through the day to achieve some level of nitrification. Since he is not running any aerators on Pond 2, duckweed has developed on the surface and George thinks the duckweed might be having a positive impact as well. George also shuts the plant down on weekends. Disposal. All treated, disinfected effluent is being discharged to irrigation fields. 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