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Hanson, RickFrom:MAHONEY770@aol.comSent:Wednesday, May 14, 2008 9:47 PMTo:Hanson, Rick; dave.muckerman@ch2m.comCc:dblackmon@tdhco.com; pmahoney@parkson.com; JNagel@parkson.com;srothenberg@parkson.com; mmiller@parkson.comSubject: Drum Thickeners for Athens, Equipment Proposal Review - Meeting 5/15/08Drum Thickeners for Athens, Clarke Co., GA. North Oconee WRF - EouiDment Proposal Review -Neaotlation Meeting 5/15108Dear Sirs:Thank you all for your time and consideration of our "bid to Engineer" for the supply of 2 x 400 gpm Rotary DrumThickeners per your specification (our Parkson product models "ThickTech 400").Further to our meeting today at 9 AM at the JJ&G offices in Atlanta, GA. I am pleased to confirm in writing ourresponses to your comments received 5/12/08 related to our bid for the RDT 400 units for the above plant.In attendance:-Mr. Rick Hanson, P.E. (Jordan Jones & Goulding)Mr. David Muckerman, P.E., BCEE (CH2MHilI)Mr. Douglas Blackmon. P.E. (The T.D.H. Company L.L.C.)Mr. Paul L. Mahoney, I. Eng. (Parkson Corporation)I interpose our response and/or confirm (blue) between each of your original questions (red) below as follows:-Drum Th ckeners - Athens Equipment Proposal Review Comments1. N informationisj.rovided to verJfythat the motors that are controlled from VFDs (i.e. floc tank mixer motors andth main drive motors) are inverter duty rated as specified. Please verify. Answer to Question 1. PARKSONposes to supplv both the specified VFDs and Motors (2 per RDT unit) required for the Floc Tank mixer andR T Drive in matched form and confirm that the poposed motors are inverter duty rated, per the specification1T eprnposal includes several options that can be included. The say_ water solenoid is not rg-qvidJor thisin tllation.A wer to Oueto 2 AKON notes that a s.pray slenoid valve will required to control the flow of thes oplied Wash Water to the Rotating Drum Assembly spray wash system. Controls for the same are includedw hin the control panel in our offer. Although not soecified, such valve(s) will supply these as part of our generalc e of equipment. The client may wish to supply another Woe that meetsany special site specific requirementsbtthese are_Lqitred~t ensr a ajs~~yinstallation control sequence.3. It is unclear in the proposal if the solids dischargae cbute jasrLeuired for the desion. The-chute shown lnther n _raviQgdappears to be a standard offering-and does n ocmatcJ the oein the design.to Question uwer 3. The solids discharge chute is included within our offer, but not drawing was producedtO show_ itgre-submittal. Such diverter chute drawing will be-part of our submittal dQcument, gQ.PJJrchase0der.4,____ r.us features in the pposal are listed as o tional but are required, eg. _en_.nor___eodrontgo1c nnection, oolvmer injection rings, etc.A iswer to question 4. Items noted as "options" in our proposal document Clause 9.0 are included in thesa )e of our offer and are in line with your specification.1

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