From: Jim Gleason [jim@treatmentequipment.com]
Sent: Tuesday, September 25, 2007 2:57 PM
To: James Kelly
Subject: FW: S1-2001, revised net present worth comparison for Aerzen
positive displacement and Neuros Turbo blowers

Attachments: Blower BCE Final.PDF; Neuros- PD Blower Payback Analysis
Final .PDF; sno co pud energy inc.pdf

Jim,

Please see note below along with the referenced attachments.  As with the previous information I've sent,  I ask that you use this for internal review on your project and do not distribute outside of your project team.

Please confirm receipt and let me know if you have any questions.

Thanks,

Jim

-----Original Message-----
From: Tom Wilkie [mailto:TWilkie@Alderwoodwater.com]
Sent: Tuesday, September 25, 2007 2:36 PM
To: Jim Gleason
Subject: FW: S1-2001, revised net present worth comparison for Aerzen positive displacement and Neuros Turbo blowers


Jim, hope this helps.

Tom

-----Original Message-----
From: Molseed, Art [mailto:Amolseed@brwncald.com]
Sent: Wednesday, July 11, 2007 6:28 AM
To: bim@alderwoodwater.com; ndavidson@alderwoodwater.com; twilkie@alderwoodwater.com
Cc: shawn_wilson@urscorp.com; Banerjee, Joyeeta; david.bloxom@tetratech.com; randy.fritch@tetratech.com; Melcer, Henryk
Subject: S1-2001, revised net present worth comparison for Aerzen positive displacement and Neuros Turbo blowers

Brigitte, Nancy and Tom:

Attached is a revised memorandum that summarizes a Business Case Evaluation
(BCE) performed to compare the net present worth for capital and power costs for Aerzen positive displacement and Neuros Turbo blowers.  This BCE includes a revised estimate of savings if Snohomish County PUD was to offer the District an energy incentive as discussed at the December 7, 2006 meeting with the utility.  The BCE includes 1) technical memorandum (Blower BCE Final.PDF), 2) spreadsheet calculations (Neuros- PD Blower Payback Analysis Final.PDF), and 3) Snohomish County PUD "announcement" for energy savings program distributed at the December 7 meeting (sno co pud energy inc.pdf).

Please note that document is labeled "Final".  This is intended to be a final draft for District review.  We will incorporatey District comments into the document before preparing for transmittal to Snohomish County PUD.

As you know, Enviroquip's scope of work currently includes Aerzen positive displacement blowers for membrane tanks and there are ongoing discussions/negotiations to incorporate Aerzen positive displacement blowers
for the aeration tanks into the Enviroquip scope.   Enviroquip has recently
provided the team with comparative quotes for both types of blowers which were incorproated into the BCE.  As described in the attached memorandum, selection of blower type affects the blower number because of turndown capability.  Therefore, there is a difference in number of blowers assumed for each type.

Thanks.  We are prepared to discuss this analysis with you at your convenience.

Art