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Table 6 A ARCADIS Hydraulic Capture Analysis Results Forward Landfill, Manteca, California USEPA USEPA USEPA USEPA Test Pumping Water- Pumping mping Pumping Rate Saturated Transmissivity Hydraulic Hydraulic Radius of USEPA Well Maximum Maximum Downgradient ul Pumped Rate Rate(Q, Thickness 2 Conductivity Gradient 2 3 Capture Width Radius of Upgradient . . • , Well Bearing Zone A gpm) gal/d) (Q,ft'/d) IT,ft (ft) Capture Capture Width r (Ywell, ±ft) (Y.,±ft) (ft) ft) Shallow/ EW-1 Intermediate 95 136,800 18,289 50 9,000 180 0.002 254 508 508 1016 162 Groundwater Zone Shallow/ EW-2 Intermediate 100 144,000 19,251 30 5,400 180 0.002 446 891 891 1783 284 Groundwater Zone Shallow/ RW-3R Intermediate 45 64,800 8,663 30 5,400 180 0.002 201 401 401 802 128 Groundwater Zone Shallow/ EW-4 Intermediate 50 72,000 9,626 40 7,200 180 0.002 167 334 334 668 106 Groundwater Zone Notes -Saturated thickness for shallow zone calculated from thickness of higher permeability sands present in the screen interval. • `-Hydraulic gradient calculated from fourth quarter 2018 groundwater flow map,but varies from 0.001 up to 0.003 depending on the season 3-Lateral plume capture from well location per USEPA(2008)capture zone evaluation guidance[Ywell=±Q/4Ti]. 4-Upgradient maximum lateral plume capture per USEPA(2008)capture zone analysis[Ymax=±Q/2Ti]. 5-Downgradient maximum plume capture per USEPA(2008)capture zone analysis [Xo=Q/2nTi]. USEPA-U.S. Environmental Protection Agency ft-feet ft/day-feet per day Q ft2/day-square feet per day Y ,yell gpm-gallons per minute 4 P 4 HMU-Hydraulic Management Unit Q Q-Discharge Y n _ +Yw,,, T-Transmissivity 2 Ti Well i-Hydraulic gradient X y well-width of capture adjacent to the extraction well JC y max-maximum upgradient capture by the extraction well 0 2 ;TTi (Stagnation Poing -Y u Xo-Stagnation point downgradient of the extraction well -Yn- -:�.� ,.:`- sN+�n,-.. .. ., •