NYCDEP BWT JOC/TOC Coordination

Jesse Goldin E.I.T.

New York Water Environment Association Young Professional Technical SessionMay 27, 2015

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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

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BWT JOC Regions

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JOC-15 Contracts

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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

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Newtown Creek Gravity Belt Thickener

WAS

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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

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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

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Newtown Creek Gravity Belt Thickener

Source: bdpindustries.com

Source: BDPIndustries.com

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• Conditions of Service

• GBT Performance Parameters

Newtown Creek Gravity Belt Thickener

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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

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Newtown Creek Gravity Belt Thickener

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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

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Newtown Creek Gravity Belt Thickener

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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

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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

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BWT JOC/TOC Program

Comments/Questions?

Contact:

jgoldin@dep.nyc.gov