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%W
<br /> %W FALL CREEK
<br /> REPORT OF WASTE DISCHARGE RNGINF.F.RTNG.TNC:.
<br /> %w year 1978 through 2002 (years 1981 and 82 were not included due to incomplete data sets for
<br /> these years). Using this data set,FCE calculated the average monthly rainfall (18.1 in/yr) and
<br /> performed a statistical analysis, using the Gaussian probability density function and exceedance
<br /> probability, to determine the 100-year annual rainfall return(33 in/yr). The projected 100-year
<br /> annual rainfall return is similar to rainfall that occurred in water year 1998, the actual wettest
<br /> year in this record(32.4 in/yr). FCE then calculated the monthly runoff volumes from the
<br /> _ winery facility for average and 100-year annual rainfall years under current and future facility
<br /> configurations. The results of these storm water calculations are shown in Table 3.3.
<br /> %W
<br /> Table 3.3. Estimated Monthly Winery Facility Storm water Runoff
<br /> Volumes for Average Year and Wet Year Rainfall Periods
<br /> �. Current Expansion(gal) 10-Yr Plan(gal)
<br /> .. Rainfall inches A=1.2 ac,C=0.88 A=1.3 ac,C=0.88
<br /> Average 100-year Average 100-year Average 100-year
<br /> January 3.74 6.84 106,963 195,532 114,310 208,963
<br /> February 3.64 6.65 103,967 190,056 111,108 203,110
<br /> March 2.78 5.09 79,566 145,450 85,032 155,441
<br /> April 1.18 2.16 33,848 61,875 36,173 66,125
<br /> May 0.60 1.10 17,154 31,358 18,332 33,512
<br /> June 0.10 0.18 2,797 5,113 2,989 5,464
<br /> July 0.03 0.06 994 1,818 1,063 1,943
<br /> �- August 0.01 0.02 236 432 252 461
<br /> ... September 0.24 0.43 6,762 12,361 7,227 13,210
<br /> October 0.92 1.69 26,402 48,264 28,215 51,579
<br /> '%' November 2.10 3.84 60,063 109,798 64,189 117,340
<br /> `, December 1 2.73 4.99 78,1001 142,769 1 83,464 1 152,575
<br /> Itw Total 18.08 33.05 516,853 944,825 552,354 1,009,722
<br /> Figures 3.2 and 3.3 show monthly projected wastewater flows under the current expansion and
<br /> %6, 10-year plan. They show that from November through May storm water runoff is the main
<br /> source of wastewater at the Winery. From June through October, the process wastewater is the
<br /> main source of wastewater. With the current expansion production level, storm water runoff in
<br /> %W the average rainfall year represents approximately 72% of the total annual wastewater discharged
<br /> `r to the wetland. In a 100-year annual rainfall year, storm water runoff represents approximately
<br /> %W 82% of annual wastewater flow. With projected wastewater flow rates and facility configuration
<br /> `w under the 10-yr plan, the storm water discharged to the wetland would be 53% and 68% of the
<br /> total volume of water discharged to the wetland during average and 100-year annual rainfall
<br /> `- years, respectively.
<br /> JESSIE'S GROVE WINERY 8 FEBRUARY 2004
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