SU0005187 - Laserfiche WebLink

Home Browse Search

100-YEAR WATER BALANCE FOR THE GEORGE REED MUNN&PERKINS AGGREGATE FACILITY SAN JOAQUIN COUNTY,CALIFORNIA Settling Ponds Prceip., Evap. Inflow,ac-in. Outflow,ac-in. Vohrme,ac-in Depth, Area, Month in in WW Precip. Evap. Perc. Recy. Change Net ft ac (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) Jan 4.00 0.95 988.8 49 3.7 1,189.4 0 -156 186 5.73 3.93 Fdi 3.59 1.40 1,143.7 44 5.5 839.5 0 342 529 2.43 3.76 Mr 3.36 2.90 1,2255 41 10.9 1,527.6 0 -272 257 10.03 4.16 Apr 2.41 4.28 1,208.7 29 17.8 1,063.2 0 157 414 4.58 3.87 May 1.51 6.46 1,142.7 18 25.0 1,365.0 0 -229 185 7.96 4.05 Jan 0.46 8.18 1,298.9 6 33.1 962.0 0 309 494 3.25 3.80 Jul 0.16 8.93 1,164.9 2 33.9 I,528.4 0 -395 99 10.04 4.16 Aug U22 7.55 1,375.7 3 31.4 904.9 0 442 540 2.12 3.74 Sep 1.17 5.45 1.181.6 14 _ -20.4 1,626,1 0 451 90 11.97 4.27 Oct 1.73 3.61 1,258.1 21 15.4 987.5 0 276 366 3.17 3.80 Nov 2.80 1.77 1,038.4 34 6.7 1,417.9 0 -352 14 923 4.12 Dec 3.75 0.98 1,190.7 46 4.0 904.1 0 328 342 2.11 3.74 Total 25.16 52.48 14,217.8 306 208.1 14,315.6 0 'Dotal pond catchment area,ac: 12.17 Percolatton Rate,in/hr: 2.38 Estimated value within the range established by Kleinfelder Geotechnical Report dated 12/28/05. Allows for reduced permeability due to sedimentation of fines. See note 7. Maximum pond storage,ac-ft: 724 Volume is determined from topographic survey conducted by NorthStar Engineering Group, dated 17105.Assumptions include constant side slopes and bottom elevations for each pond. Maximum storage volume of 72.4 acre-feet includes three(3)ponds with 2 feet of freeboard. (1) Water balance begins in January (2) 100-yr annual precipitation depth of 25.16 inches for Escalon is a weighted average of 119 years of precipitation data for Oakdale and Modesto provided by the California Department of Water Resources.The annual value is distributed monthly in accordance with mean monthly precipitation patterns. (3) Average monthly evaporation data from Calforna DWR CIIvBS. (4) Water inflow equals daily wastewater flow times days per month. (5) Precipitation inflow equals precipitation(2)times total pond catchment area of all three ponds+runoff from areas tributary to ponds. Runoff calculations use an average coefficient of C,0.45 for all areas except ponds,where X1.0. Acreage of each runoff area is shown on Exhibit H of the ROWD Technical Repot. (6) Evaporation outflow equals evapotranspiration(3)times pond water surface area(12)from previous month. (7) Pond percolation estimated as a function of submerged side slope area of all ponds and fractional amount through bottom of perc pond. (8) Recycle outflow equals zero as the plant does not regularly recycle from ponds(facility operations do not require a recycle stream). (9) Volume change equals ww inflow+precipitation inflow-evaporation outflow-percolation outflow-recycle outflow. (10) Net volume equals running total of volume change(9),beginning in January. (11) Pond water depth estimated from pond geometries and topographic field survey acquired 12/05. (12) Pond water surface area estimated as a function of net volume(10). Wastewater Generation Data,gpd Peak gpd: 2,202,021 Average Daily: 1,057,661 Dry Season Avg: 1,095,529 Wet Season Avg: 1,020,882 C?Documents aM SetvngsGbleck NSTARENGGROUP 000\Lwal Settings\Temporary Internet Files\OLK11 OUP Balance v3 XIS