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WASTEWATER CHARACTERIZATION Influent samples are collected from the WWTP monthly and analyzed for pH, biochemical oxygen demand (BOD), and total suspended solids (TSS). The results of influent sample collected in 2007 are presented in Table 3. The average influent pH concentration during 2007 was 7.4, with a range of 6.8 to 7.7. Influent BOD observed in 2007 ranged ftom 106 to 660 mg/L, with an average concentration of 240 mg/L. In 2007, TSS ranged from 70 to 1,180 mg/L, with an average concentration of 287 mg/L. Effluent samples are collected from the WWTP weekly and analyzed for pH, turbidity, BOD, TSS, total dissolved solids (TDS), coliform bacteria, electrical conductivity (EC), and settleable solids (SS). The average effluent BOD concentration reported in 2007 was 12.0 mg/L and average effluent TSS was 7 mg/L. Coliform bacteria were typically not detected in effluent samples. Two coliform detections in December 2007 (2,400 and 50 1\4PN/100 mL) were attributed to a failure of the ozone disinfection system, which has since been repaired. The results of effluent samples collected in 2007 are summarized in Table 3. WASTEWATER TREATMENT Wastewater generated at the RV Park is treated with a Bio -Pure wastewater treatment system manufactured by ACT. The Bio -Pure® process is an intermittent cycle, extended aeration system G (ICEAS), consisting of extended aeration, clarification, multimedia filtration, and ozone disinfection. The WWTP is rated by the manufacturer to treat 50,000 gallons per day (gpd). Wastewater flows into a lift station with an operational capacity of 17,770 gallons. Wastewater held in the lift station is aerated. Wastewater is screened prior to being pumped into the aeration chamber, where the wastewater is treated by forced air aeration. The aeration chamber has an operational capacity of 21,610 gallons. After a set time, treated wastewater is transferred to a clarifier with a 10,820 -gallon operational capacity. Floating waste is collected in the clarifier and returned to the aeration chamber. Clarifier supernatant flows into an ozone contact chamber with an operational capacity of 4,030 gallons. Ozone is injected into the contact basin for a minimum of 40 minutes. Sludge collected in the clarifier and ozone contact chamber are returned to the aeration chamber. Once the wastewater has been disinfected it is pumped through multimedia filters prior to being stored in a golf course pond located immediately east of the treatment plant. A schematic of the RV Park WWTP is provided in Figure 3. The vendor for the WWTP reports that the system contains approximately 26,000 gallons of reserve and flow equalization capacity, equivalent to approximately 50% of the rated daily flow. In addition to the reserve and equalization capacity in the WWTP, treated wastewater is stored in a golf course pond prior to dispersal, which is equivalent to approximately one day of storage at peak flows. The Bio -Pure treatment system is warranted by the manufacturer to produce effluent with biochemical oxygen demand (BOD) less than 10 mg/L, total suspended solids (TSS) less than t 10 mg/L, and total coliform bacteria less than 2 colonies per 100 mL. Although the WWTP French Camp — Report of Waste Discharge 3 SAB027102 July 2008 n:Isab0271021documents\rwd\frenchcamprwd_july rev 6nal.doc