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PROPOSALFOR <br />On -Call Engineering Design Services <br />PEAS Treatment Systems <br />cost during construction, as full-size anchor layout templates must be created for each vessel, the templates <br />must be field located by surveyors and secured to the formwork to keep the anchors from shifting as the <br />concrete is placed. <br />The convenience of post -installed anchors can be reclaimed by the use of late pour pockets at each of the <br />tank legs. Please refer to the sketches below for a typical plan and section of the late pour pockets. A small <br />portion of the tank foundation will be blocked out with formwork so that the space within the block -out will not <br />be filled with concrete at the time the rest of the foundation concrete is placed. The reinforcing for the <br />foundation will run through the late pour block -out, and it will be located to miss the tank anchors. This will <br />create relatively clear areas at each tank base plate where the cast -in -place anchor baits can be located with <br />some freedom for field adjustments. Additional reinforcing stirrups (if required) may be placed in the late pour <br />pocket for increased concrete strength. After the tanks are properly located and temporarily supported, the late <br />pour pockets will be filled with high strength cementitious grout. After the grout in the late pour pocket sets, <br />final adjustments to the tank height may be made, to plumb and level the tanks. These adjustments are made <br />using the leveling nuts under the base plates. <br />r*NK wVDATImf--_ -max tawrw�l <br />(41141 f: �sIN M <br />clrRAN CO N <br />faNY} rat rs Mid! K W4., <br />.<'0�11TI LwA4 <br />�.I a MIN <br />I� ! i � I•il <br />i� t A �.r ssti <br />'�MPdR+uYJ �„1l8L srerGMTs+ S.�Odr <br />E lfpFblt Td roe I�d R'6C N�RJ,C PGGrb i' <br />ra dv <br />Twx 1s.wr PtarE (ar,.a,+�e] <br />Lary PwQ PtlCkEY P 4AI <br />IX Preliminary Treatment Sizing <br />ruN >Yp<.� re:aPazrp�� <br />rHxAJe H Carr AW N%eer. <br />ZA1°�,,a¢ ��NCv0, 41tRi r^ n Mi <br />I 1;/; pdcrS <br />�7JANA AW fe.fire <br />�1Qndrrrolw+c � <br />I�IC�7v2'ApoclR'`-�' <br />;.v srs�N�>f1 �3hour <br />c�rr Pcuc pyc��r <br />IX system sizing is based on the minimum Empty Bed Contact Time (EBCT) required to successfully adsorb a <br />particular pollutant and the allowable superficial velocity, or hydraulic loading rate of the vessel. IX treatment <br />for PFAS removal is configured in 2-vessel trains, with one train acting as the lead and the second train acting <br />as the lag (i.e. the vessels operate in series). <br />Santa Ana Well 26 was evaluated to consider what a PFAS treatment system for this site could look like. <br />Santa Ana Well 26 supplies the East Reservoir and Pumping Station. The well production from 2010 to 2022 <br />varied from 1,565 gpm to 2,454 gpm. Design criteria of the existing well are summarized in Table 1. <br />TETRA TECH Page 19 <br />