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<br /> FALL CREEK
<br /> REPORT OF WASTE DISCHARGE so F.NGINFERING.TNC.
<br /> 1�. Water Balance Calculations for High Annual Rainfall
<br /> Table 4.3 presents the results of the water balance calculations based on the same process flow
<br /> rates as above and projected storm water flows in a 100-year annual rainfall year. The water
<br /> balance calculations show during eleven months of the year all wastewater and storm water will
<br /> %b, be contained in the wetland and land disposal system. Only during the month of January there
<br /> ` will be some overflow to the storm water detention area. The results indicate that the facility
<br /> will have excess capacity to contain both wastewater and storm water runoff from the winery.
<br /> .. Table 4.3. Water Balance Calculations for the System in a 100-Year
<br /> %W Annual Return Rainfall Year(33 inches/year)
<br /> WdIaM I Grass Storwwalcr Dctantion Arta
<br /> Process Water flow Stamwater Direst W06M ET WM.M Wetland I Dir Grass Excess Dirt
<br /> `. Month (gal) rurwff(gal) Rainfall (gal) Swrage Outflow Rainfall G-ET Mfiltnm Water Rainfall ET Infiltration Stange Overflow
<br /> Pt - -(gal) St(al RWt al) EWt al SWI OWt al RGI al EGt IGt OGt 1 RPt(gal) EPI I IN al SPI al) ON
<br /> Initial C.Mi-, - - 4$387 - - - - - - - - -
<br /> January 2,055 195,532 41,784 5,535 48,387 461,301 111,436 14,762 488,809 69,166 19,187 3,093 84,161 1,099 -
<br /> Fe-y 6,962 171,663 40,614 8,721 48,387 210,517 108,315 23,259 488,809 - 18,649 5,412 94,161 - -
<br /> March 7,707 145,450 31,082 16,949 48,387 167,290 82,894 45,203 488,809 - 14,272 10,824 84,161 - -
<br /> April 7,459 59,879 17,222 25,909 48,387 54,651 35,263 69,098 488,809 - 6,071 16,898 94,161 - -
<br /> MaJ
<br /> 5.1 38
<br /> 71,758 6,701 35,898 48,387 7,299 17,871 95,738 488,809 - 3,077 24,740 94,161 - -
<br /> June 4,973 4,948 1,093 42,471 16,929 - 2,914 113,267 488,809 - 502 24,961 94,161 - -
<br /> July 5,138 1,818 388 43,032 - - 1,036 114,762 488,809 - 178 31,809 94,161 -
<br /> August 30,830432 92 37,661 - - 246 100,440 488,809 - 42 27,281 94,161
<br /> tem - -
<br /> Sep49,725 11,963 2,642 28,231 36,098 - 7,045 75,291 488,809 - 1,213 20,433 94,161 -
<br /> Octobc 43,675 48,264 10,314 17,742 48,387 72,221 27,506 47,317 488,809 - 4,736 12,370 94,161 -
<br /> Novcm 19,890 106,256 27,467 9,064 48,387 140,545 62,575 24,174 466,809 - 10,774 5,412 84,161 -
<br /> Decem 20,553 142,769 70,509 4,638 48,787 189,193 81,366 12,369 488,809 14,009 2,982 94,161
<br /> Taal 204,105 920,731 201,904 275,852 1,303,018 538,466 735,680 5,865,702 69,166 92,711 186,215 1,009,935 -
<br /> V
<br /> �. 4.3.2 Analysis of Wetland Organic Loading Rates
<br /> For the most part, the treatment efficiency of wetlands is dependent of the hydraulic detention
<br /> time of the wetland. It is generally expected that a detention time of at least 6-7 days is optimal
<br /> `. and that any shorter than that will not provide adequate treatment. Organic loading rates are also
<br /> a factor in design.
<br /> The EPA recommends a mass loading rate of approximately 112-kg BOD5/ha-d (1001b BOD/ac-
<br /> d) (USEPA, 1988). However, experimental studies have shown that BOD loading rates of up to 8
<br /> times this recommended value (1640 kg BOD5/ha-a or 1464 lb BOD/ac-d) have produced
<br /> significant organic reductions in winery wastewater(Shepherd et al, 2001). Results of that study
<br /> also found that despite fluctuations in inlet wastewater strength, the outlet water quality was
<br /> generally consistent and occasional excessive organic loading did not interfere with treatment.
<br /> FCE determined the expected monthly organic loading rates at Jessie's Grove Winery according
<br /> to the following equation:
<br /> `. L = 3.785*(CPQp +CsQs)*(I-e5eptic)
<br /> 1%W 1,000,000*d*A
<br /> where L is the loading rate(kg/ha-d), CP is the concentration of BODS in the process water
<br /> (assumed to be 5000 mg/L after screening for coarse solids), QP is the process water monthly
<br /> flow rate, Cs is the concentration of BODS in storm water(assumed to be 62 mg/L, see Section
<br /> 3.2.2), Qs is the monthly flow rate of storm water, eSept;G is the septic tank's BOD removal
<br /> %W
<br /> Vftr JESSIE'S GROVE WINERY 17 FEBRUARY 2004
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