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PRO„ AA, I I' <br />On Call Engineering Design Servl<es <br />PFAS Treatment Systems <br />Existing Condition 2,454 256 285 <br />(No PFAS) <br />Proposed IX Treatment with Clean 2,454 302 328 <br />Filters <br />Proposed IX Treatment with Dirty 2,454 317 343 <br />Filters <br />A system curve for Well 26 with PFAS treatment is presented in Figure 1. The existing well pump curve is not <br />provided at this time, therefore a generic curve is included to indicate a pump curve that would be capable of <br />incorporating treatment. During the design process Tetra Tech will evaluate all of the actual existing well pump <br />curves against the calculated new system curve to determine the well pump's ability to meet the new system <br />pressure requirements with PFAS treatment. The maximum flow rate the pump will operate at with the new <br />treatment will be presented, and if unacceptable recommendations made for modifications such as adding <br />bowls, changing motor size, or replacing the well pump entirely. <br />i <br />sao eaa <br />ilwv <br />----- -- ------ ----- <br />n IP 17 1C 15 le 2. 21 21 Te 1. . s> ll lc <br />rw„u.. m OPe,rtb� <br />Figure 1. Preliminary system <br />curve for Well 26 and <br />example pump curve. <br />note, actual pump curve not <br />available, shown is an example <br />for demonstrative purposes. <br />Figure 2. Example lead lag <br />model for use to establish <br />increased monitoring and <br />resin change -out <br />frequency requirements. <br />TET ouncil 19 — 40 4/4/202 aye I r t <br />