Laserfiche WebLink
TABLE 2 — SUMMARY OF HELP MODEL PREDICTIONS <br />LCRS Design - Area 26 <br />Foothill Sanitary Landfill <br />AVERAGE ANNUAL RESULTS <br />AVERAGE <br />LANDFILL <br />WASTE <br />CONDITION <br />FILL <br />AVERAGE <br />(FT) <br />Active Cell <br />PRECIP <br />RUNOFF <br />15 <br />(Base) <br />1083 <br />Active Cell <br />MAXIMUM <br />(Side Slope) <br />7.5 <br />Closed Cell <br />DRAINAGE <br />(Current <br />145 <br />Plan -Base) <br />261 <br />Closed Cell <br />May <br />(Potential <br />300 <br />Plan -Base) <br />5 <br />LCRS Design - Area 26 <br />Foothill Sanitary Landfill <br />AVERAGE ANNUAL RESULTS <br />PEAK DAILY RESULTS <br />FLOW RATE <br />i <br />(GPD) <br />FLOW RATE <br />(ft'/day) <br />FLOW RATE <br />s <br />(ft /day/ac) <br />LATERAL <br />AVERAGE <br />LATERAL <br />< 1 <br />PRECIP <br />RUNOFF <br />ET <br />8,101 <br />1083 <br />74 <br />MAXIMUM <br />(IN/YR) <br />(IN/YR) <br />(IN/YR) <br />DRAINAGE <br />HEAD <br />DRAINAGE <br />HEAD (IN) <br />261 <br />18 <br />May <br />(IN/YR) <br />(IN) <br />(IN/DAY) <br />5 <br />20.10 <br />0.00 <br />11.22 <br />8.78 <br />< 1 in <br />0.34 <br />0.059 <br />20.10 <br />1 0.00 <br />1 11.22 <br />1 8.78 <br />1 < 1 in <br />0.34 <br />1 0.043 <br />20.10 1 9.02 1 9.63 1 1.33 <br />20.10 1 9.02 1 9.63 1 1.33 <br />< 1 in 0.13 0.023 <br />< 1 in 0.13 0.022 <br />The peak daily drainage result was used as the 'impingement rate' for drainage layer capacity <br />calculations, which is described in the following section. The maximum predicted head of 0.059 <br />inches is less than the assumed drainage layer thickness of 0.3 inches, thus confirming the <br />condition of unconfined flow, which makes the maximum head equations valid (Giroud et al., <br />2000) and satisfies the Federal requirement for maximum head on the liner system. <br />4.7 Comparison to Existing Operations <br />Reported monthly leachate volumes from Area 2A site operations during 2017 are presented in <br />the following table. <br />TABLE 3 - FOOTHILL SANITARY LANDFILL 2017 LEACHATE DATA: AREA 2A <br />MONTH <br />GALLONS <br />COLLECTED PER <br />MONTH <br />FLOW RATE <br />i <br />(GPD) <br />FLOW RATE <br />(ft'/day) <br />FLOW RATE <br />s <br />(ft /day/ac) <br />Jan <br />10 <br />< 1 <br />< 1 <br /><1 <br />Feb <br />226,820 <br />8,101 <br />1083 <br />74 <br />Mar <br />22,050 <br />1,470 <br />197 <br />13 <br />Apr <br />68,480 <br />1,956 <br />261 <br />18 <br />May <br />17,230 <br />492 <br />66 <br />5 <br />Jun <br />9,680 <br />691 <br />92 <br />6 <br />Jul <br />1,393,760 <br />44,960 <br />6011 <br />412 <br />Aug <br />1,394,610 <br />44,987 <br />6014 <br />412 <br />Sep <br />1,419,620 <br />47,321 <br />6326 <br />433 <br />Oct <br />1,512,510 <br />48,791 <br />6523 <br />447 <br />Nov <br />1,512,510 <br />50,417 <br />6740 <br />462 <br />Project No. AU 17.1254 1 LCRS Design 7 <br />May 2018 <br />