1184858_RFP 03-22 Leachate Evaporation System Appendix B Performance Requirements.pdf

Heat Assisted Leachate Evaporation System

RFP 03-22 – Appendix B

Performance Requirements

Southeastern Public Service Authority (SPSA) 723 Woodlake Drive, Chesapeake, VA 23320

757.420.4700 www.spsa.com

TABLE OF CONTENTS

SECTION I

EXISTING SITE CONDITIONS

EXISTING LEACHATE SYSTEM

LEACHATE CHARACTERISTICS

SECTION II

PERFORMANCE REQUIREMENTS

SECTION III

SCOPE OF SUPPLY

SECTION IV

OPERATIONS

SECTION V

ATTACHMENTS – SEPARATE FILES

ATTACHMENT 1 – OVERALL AND EXISTING CONDITIONS PLAN

ATTACHMENT 2 – PAGES FROM SPSA LEACHATE MANAGEMENT

IMPROVEMENTS - PHASE 1 SCADA SYSTEM AS-BUILT

DRAWINGS

ATTACHMENT 3 – PAGES FROM SPSA LEACHATE MANAGEMENT

IMPROVEMENTS - PHASE 2 LEACHATE LOADOUT AND PUMP

STATION AS-BUILT DRAWINGS

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SECTION I

EXISTING SITE CONDITIONS

The SPSA Regional Landfill is currently comprised of six disposal cells. Cells I to IV consist of 102 acres of lined landfill first operated in 1985 that were closed in 2008 and include approximately 12 million cubic yards (CY) of municipal solid waste (MSW). The 43.6-acre Cell V landfill was constructed and began operations in 1997. Cell V contains approximately 6 million CY of MSW and waste to energy ash residue materials, with the ash comprising approximately 25% of the waste by weight. The 41-acre Cell VI was constructed in two phases beginning in 2006 and has a capacity of approximately 8.9 million CY; including overlap onto Cell V. Cell VI contains MSW and ash, with the ash comprising approximately 27.5% of the total waste by weight. In July 2024, SPSA anticipates that ash will no longer be received by the facility and that MSW disposal will increase from 100,000 to over 450,000 tons per year. SPSA has state regulatory permit approval for the construction of Cell VII, comprising of 56.1 acres to the east of the existing Cell V. Cell VII will provide an additional 10 million CY of disposal capacity. Construction of Cell VII – Phase 1 (30.8 acres) is anticipated to commence in 2024 and be operational in April 2026.

EXISTING LEACHATE SYSTEM

The leachate pre-treatment system receives leachate from closed Cells I-IV, the active Cells V and VI, leachate collected from SPSA’s transfer stations and delivered via tanker truck, and domestic wastewater flows from on-site facilities. The pre-treatment system consists of a 0.8 million gallon (MG) aerated lagoon followed by a 0.8 MG clarifying lagoon. The aeration system was equipped with four aerators; however, only one two are currently in service. Aerators were taken offline over time as the biological organic strength (BOD5) decreased and less oxygen was required to reduce the BOD5 concentration to meet the discharge permit. Settled sludge in the clarifying lagoon is not recycled to the head of the aerated lagoon. Cells I-IV gravity discharges from leachate collection manholes to the leachate management pump station wet well where it is discharged into the aeration lagoon. Leachate from Cells V and VI are pumped from submersible sump pumps to the Cell V Lift station which pumps leachate directly into the aeration lagoon. Leachate is discharged from the clarifying lagoon via a gravity line and modulating control valve to a wet well where it is discharged via a forcemain to the existing HRSD Nansemond Water Treatment Facility or pumped to the loadout station for loading of tanker trucks for disposal at alternate HRSD treatment facilities.

SPSA is effectively managing up to 50,000 gpd with the pretreatment and disposal system. A sitewide leachate SCADA system was installed in 2018 and 2019 to monitor and control the operations of the leachate pump stations at each Cell, the Cell V lift station, and the discharge of treated leachate. The proposed leachate evaporation system shall communicate with the sitewide leachate SCADA system for recordation of

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process flows and alarm conditions that SPSA would require for record keeping and reporting, and response actions.

An overall site plan and existing conditions plan depicting the preferred location for the evaporation system are included as a separate file titled “Appendix B - Attachment 1 – Overall and Existing Conditions Plan.pdf”. Excerpts from the Leachate SCADA Record Drawings are included as a separate file titled “Appendix B - Attachment 2 – Pages from SPSA Phase 1-As-Built Drawings.pdf”. Excerpts from the Leachate Pump Station and Loadout Record Drawings are included as a separate file titled “Appendix B - Attachment 3 – Pages from SPSA Phase 2 As-Built Drawings.pdf”. The drawings include relevant site information, one-line diagrams and control panel diagrams. Additional information including Operation and Maintenance Data for SCADA and Pump Station components can be provided if requested.

LEACHATE CHARACTERISTICS

SPSA Leachate is sampled once per month in accordance with its Industrial Discharge Permit with HRSD. The laboratory data from 2020 and 2021 data are summarized in Table 1 below. The pH during this period has ranged from 7.2 to 7.9. All VOCs per EPA

624.1 have been below analytical detection limits. While these data describe current leachate characteristics, changes will occur over the coming years as the waste in the currently operating cells ages and the new cell opens up. During the pre-proposal on January 5, 2022, vendors may collect a sample of leachate to perform their own analytical and/or bench testing.

Table 1: SPSA Landfill Constituents in Leachate from Jan 2020 to August 2021.

All concentrations are in mg/L

BOD COD Cu Cr Zn Pb Ni Ag Cd As Hg Phenolics TDS1 TKN1

Max 152.00 1410.00 <0.009 0.035 0.088 <0.01 0.062 <0.01 <0.01 0.54 <0.0002 0.120

Min 2.83 841.00 <0.009 0.017 0.012 <0.01 0.033 <0.01 <0.01 0.02 <0.0002 0.049

Avg 67.12 1123.50 <0.009 0.027 0.036 <0.01 0.051 <0.01 <0.01 0.08 <0.0002 0.063 11,800 484

Notes 1. Only one sample collected for analysis on 8/26/21

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SECTION II

PERFORMANCE REQUIREMENTS

1. CAPACITY: Leachate Evaporation System shall have the capacity to evaporate 60,000 gallons per day. In the case of the alternate bid, two Systems shall have the capacity to evaporate 60,000 gallons per day each.

2. VOLUME REDUCTION: The Leachate Evaporation System shall be able to achieve 93% reduction in leachate volume at a minimum. At the capacity flow (60,000 gpd) the leachate concentrate will be equal or less than 4,200 gpd.

3. RESIDUALS: Vendor will be responsible for disposal of concentrate from evaporation at a permitted disposal or treatment facility. This can be achieved in one of the two ways discussed below. Straight recirculation of concentrate is not a consideration.

(a) Solidification – Leachate concentrate can be solidified with dried material until the waste can be classified as a solid waste (by passing SW-846 Test Method 9095B: Paint Filter Liquids Test). This solid waste can then be landfilled onsite at the SPSA regional landfill.

(b) Hauling – Leachate concentrate may also be hauled offsite for disposal at a permitted landfill or wastewater treatment facility.

4. SYSTEM REDUNDANCY: All rotating equipment that is critical to the function of the Leachate Evaporation System shall be redundant. For pumps this shall mean an installed spare. For mixers, motors, etc., it shall mean a shelf spare.

5. SYSTEM RELIABILITY: The Leachate Evaporation System shall be capable of operating at the required capacity for greater than 97% of days in any given year.

This means that the system shall not be offline and unable to achieve the required capacity for more than ten (10) days per calendar year.

6. UTILITIES: The following utilities will be provided by SPSA for operation of the Leachate Evaporation System:

(a) Natural gas or landfill gas for use in heat assisted units to meet the BTUs required for operation of the system

(b) Electricity to operate the system

(c) Non-potable water for washdown and restrooms

7. CONNECTIONS: The following connections will be required for the Leachate Evaporation System:

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(a) Electrical Service – Connection to electrical service within the existing Electrical building shall be by Vendor. Existing Motor Control Center and Power Panels have space and spares that can accommodate significant additional loads. Please refer to the Attachments 2 and 3 for information related to electrical capacity and motor control center availability.

(b) Leachate – Leachate to be drawn from existing pump station wet well.

Existing low flow pumps to the Nansemond Wastewater Treatment Facility can be removed to permit installation of new evaporation feed pumps.

SPSA must maintain the ability to bypass the Leachate Evaporation System via the existing suction lift pumps and leachate loadout station, should the required disposal volume exceed the treatment capacity of the evaporation system. SPSA will be responsible for costs associated with the transportation and disposal of bypassed leachate.

(c) Natural Gas and Landfill Gas (LFG) – Vendor shall make connections to the natural gas and LFG HDPE pipe feeds to the project limits by SPSA.

System shall be capable of providing continuous combustion of LFG when the leachate evaporation system is not operating.

(d) Controls – Vendor’s instrumentation and control system shall integrate with the leachate SCADA system. The evaporation system shall transmit instantaneous and daily leachate flow to the evaporation system, instantaneous and daily residue flow rate and any alarm conditions requiring SPSA attention and response.

(e) Sewer – not supplied. Emergency shower and other drains and restroom may be plumbed to existing Cells I – IV leachate wet well for pumping to the aeration lagoon. Domestic sewer shall be managed with a grinder pump.

(f) Compressed air – not supplied.

8. PERMITTING SUPPORT: SPSA will complete the local site plan and erosion and sediment control permitting. Vendor shall assist with the preparation of the VADEQ solid waste permit modification application to be filed by SPSA.

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SECTION III

SCOPE OF SUPPLY

1. LEACHATE EVAPORATION SYSTEM: Shall include all foundations, tanks, mixers, pumps, heating elements, piping, valves stacks, enclosures and instrumentation necessary to make a complete system.

2. LEACHATE FEED PUMPS: If required, shall be provided to draw leachate from the existing pump station wet well to the Leachate Evaporation System.

3. PIPING: Exterior process piping shall be CPVC piping HDPE or stainless steel.

Underground leachate lines shall be HDPE, SDR 17 or thicker walled pipe.

4. OUTDOOR INSTALLATION: The Leachate Evaporation System components shall be suitable for an outdoor installation. Electrical equipment shall be in NEMA 4X enclosures. Any exposed plastics must either be of UV-resistant resin, covered, or coated. All water lines smaller than 2-inches much be insulated. All piping low points to be equipped with manual drain valves.

5. AUTOMATIC OPERATION AND CONTROLS INTERFACE: The Leachate Evaporation System shall be equipped and programmed to operate in fully automatic mode so as to require minimal operator oversight. System controls will be by local PLC with ethernet connection to overall site SCADA system.

6. SPECIAL TOOLS: The System shall include supply of all necessary special tools and handling equipment.

7. INSTALLATION: Vendor shall install the supplied equipment including civil works, equipment placement, and connections as described in the previous section.

8. DOCUMENTS AND DRAWINGS: Vendor shall provide the following documentation and drawings during the design phase.

(a) Mass/Heat Balance and Process calculations

(b) Equipment Lists (including valves and instruments)

(c) Utilities List

(d) Inspection and Test Plan

(e) Performance Test Plan

(f) Drawings including:

(i) Process Flow Diagram

(ii) Piping and Instrumentation Diagram

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(iii) General Layout

(iv) Electrical schematic and wiring interconnection drawings

(v) Foundation details

(vi) Equipment details

(vii) Drawings of supplied instruments

(viii) Installation drawings

(g) As-built drawings shall be provided following installation and commissioning.

(h) Spare Parts – Vendor to prepare a Spare Parts List which includes recommended stock levels and lists the original OEM part numbers.

(i) Detailed Operations and Maintenance Manual that includes clear instructions for startup, operating, shutdown and troubleshooting as well as documentation for all of the included equipment.

9. Performance Test: After mechanical completion and prior to Final Acceptance, Vendor perform shall perform a five-day performance test during which all performance requirements must be met.

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SECTION IV

OPERATIONS

1. OPERATIONS: Vendor to operate Landfill Evaporation System in order to effectively manage the generated leachate volume, and up to 60,000 gallons per day per each unit meeting the performance requirements listed in Section II.

2. STAFFING: Vendor to provide well-trained qualified personnel meeting any applicable operator training and certification requirement required by VADEQ.

3. AVAILABILITY: Vendor to provide access to qualified personnel via phone on a 24x7 emergency basis.

4. MAINTENANCE: Vendor to establish a preventive maintenance program and perform all preventive maintenance required.

5. PART REPLACEMENT AND REPAIRS: Vendor to be responsible for maintaining recommended spare parts inventory, replacing parts as appropriate and making all repairs minor or major.

6. REPORTING: Vendor to provide monthly operating reports including information of volume of leachate processed, concentrate generated, as well as operating data, repairs performed, etc.

7. OWNER TRAINING: If SPSA shall determine that it will be responsible for operation and maintenance of the system, Vendor shall provide requisite training to SPSA staff or designee on all system requirements and recordkeeping. Training shall be completed over a 5 day operating period.

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SECTION V

ATTACHMENTS – SEPARATE FILES

Attachment 1 – Overall and Existing Conditions Plan

Attachment 2 – Pages from SPSA Leachate Management Improvements - Phase 1 SCADA System As-Built Drawings

Attachment 3 – Pages from SPSA Leachate Management Improvements - Phase 2 Leachate Loadout and Pump Station As-Built Drawings