nycdep bwt joc-toc coordination [autosaved]
TRANSCRIPT
NYCDEP BWT JOC/TOC Coordination
Jesse Goldin E.I.T.
New York Water Environment Association Young Professional Technical SessionMay 27, 2015
2
BWT JOC ProgramJOB ORDER CONTRACTS (JOCs)
• Capital Construction Upgrades For
o Wastewater Treatment Plants
o Wastewater Pump Stations
o Ancillary Facilities (CSOs, Interceptors)
• Small to Medium Sized Jobs
• First Introduced in 2000
• Issued over 2,600 Jobs Orders with value over $353 Million
• Jobs Priced out of a Unit Price Book (Otherwise NPP)
• PLA/MWBE Requirements
3
BWT JOC Regions
3
JOC-15 Contracts
4
BWT TOC Program
TASK ORDER CONTRACTS (TOCs)
• Consultant Design Projects
• 2 Contracts (North and South Regions)
o PW-88-1 (North)
o PW-88-2 (South)
• 2 Years - $3 Million Each
o First BWT TOC Program
• Types of Designs
o Capital Construction
o Expense Studies/Permitting Assistance
• M/WBE Requirements
5
Newtown Creek Gravity Belt Thickener
WAS
6
Newtown Creek Gravity Belt Thickener
PURPOSE
• Thickening/Dewatering of Raw, Un-Digested Waste Activated Sludge (WAS)
o NYC Primarily uses Centrifuge Thickening
• PW-88-2 Task 7 and Task 26
• Task 7: Feasibility Study on Alternative Sludge Thickening at Newtown Creek
o Alternatives to Centrifuge Thickening
• Centrifuge Thickening has high energy and O&M costs
• Polymer Blending Requirements
7
Newtown Creek Gravity Belt Thickener
• Alternatives Considered
o Gravity Thickening
o Gravity Belt Thickener
o Rotary Drum Thickener
o Rotary Press
• Gravity Belt Thickener Selected (Greatest Savings/Shortest Payback)
o 20 Year Net Present Value of +$21.5 Million (Savings)
o 10 Year Payback Period
o One Tenth the energy demand of centrifuges
o Annual O&M cost $3 Million lower than centrifuges
8
Newtown Creek Gravity Belt Thickener
Source: bdpindustries.com
Source: BDPIndustries.com
9
• Conditions of Service
• GBT Performance Parameters
Newtown Creek Gravity Belt Thickener
9
Service Condition Typical RangeTemperature 60 oF 50 – 100 oFFeed Solids
Concentration 3,400 mg/L TSS 1,500 – 7,600 mg/L TSS
Feed Solids pH 6.5 6.0 – 9.0
Performance Criteria Required Average Acceptable RangeHydraulic Loading Rate 400 gpm >= 400 gpm
Solids Loading Rate 1,200 lb/hr >= 1,200 lb/hrThickened Sludge
Concentration 5% TS* 4.5 – 7.0 % TS
Solids Capture >= 90% 90 – 99%Polymer Dosage <= 12 active lb/DT** 10 – 15 active lb/DT
*percent total solids on a weight basis **active pounds of polymer per dry ton of feed WAS
10
Newtown Creek Gravity Belt Thickener
10
11
Newtown Creek Gravity Belt Thickener• Task 26: GBT Pilot Specifications
Specification Detail
Skid Mounting Structural Steel Frame-Max Length 28 Feet, Max Width 12 Feet
GBT Dimensions 8.5 ft Wide x 22.5 ft Long x 6.5 ft High
Belt Material Porous High Strength, High Quality Polyester
Belt Drive Variable Frequency Motor (5 hp Max)
Polymer Mixing Variable Orifice Venturi Mixer
Fully Enclosed/Odorous Air Extraction SystemBlower Providing Negative Air Pressure
Dry-Scrubbing Carbon Media2-Ply Polyvinyl Ductwork
Sludge Hopper ¼ Inch Thick Stainless Steel Plate
Instrumentation Programmable Logic Controllers
Sump Basin Flanged Outlet at Sump Low Point
Belt Washwater SystemEnd Suction Centrifugal Pump (10 hp Max)
Stainless Steel Piping/Spray Nozzles40 gpm Max at 90 psig
Overflow Bypass Channel Drain into Sump Basin
12
Newtown Creek Gravity Belt Thickener
13
Newtown Creek Gravity Belt Thickener
• Construction:
o $820,000 estimate under contract JOC-15-EP ($10 Million) – Delphi Plumbing
o Initiation to Joint Scope stage
o Construction Start in 2-3 Months
o Milestones:
Substantial Completion: 182 CCDs from NTP
Final Acceptance: 203 CCDs from NTP
14
TOCs
• 2 Year Contracts at $3 Million insufficient
o PW-102 will replace the PW-88’s with 3 Five Year Contracts at $5 Million Each
o Capital Construction Design
o Aligned with JOC Regions
o Future expense design through 1429-ENGSVC
JOCs
• Single Bidders winning Electrical Contracts
o Provide broader electrical outreach to perspective bidders
• Streamlining Job Order Creation
o Consolidate DEP sign offs
o Pre-Qualify Subcontractors
JOC/TOC Program Challenges and Goals
14