Exhibit_C_-_Operational_Guide.pdf

Operational Guide Collier County Solid Waste Division Leachate Storage and Deep Well Injection Facility

Nicholas Henslee 3/18/23

FINAL VER: 3-18-2023

Job number: W219000FL.04 Page 1-1 LST/DIW Operators Manual March 2023 Collier County Solid Waste Division

Table of Contents

Section 1 Introduction........................................................1-1

1.1 General............................................................................................................................... 1-1

1.2 Deep Injection Well Overview .......................................................................................... 1-1

1.3 Important Contacts ............................................................................................................. 1-2

1.4 Alarm Code Cheat Sheet.................................................................................................... 1-3

1.6 Design Criteria ................................................................................................................... 1-4

1.7 System Tags ....................................................................................................................... 1-5

1.8 Valve Locations ................................................................................................................. 1-6

Section 2 Standard Operating Procedures ......................... 2-1

2.1 Operating Scenarios ........................................................................................................... 2-1

2.1.1 Parallel Scenario ........................................................................................................ 2-1

2.1.2 Single Tank Scenario .................................................................................................. 2-1

2.1.3 Draining a single tank ................................................................................................ 2-2

2.1.4 Manual Pump Down ................................................................................................... 2-3

2.2 Compliance ........................................................................................................................ 2-3

2.2.1 Introduction................................................................................................................. 2-3

2.2.2 Testing intervals .......................................................................................................... 2-4

2.2.3 Locations ..................................................................................................................... 2-4

2.2.4 Sampling Procedures .................................................................................................. 2-4

2.3 Dual Zone Monitoring Well (DZMW)........................................................................... 2-5

2.3.1 Overview ..................................................................................................................... 2-5

2.3.2 Design Criteria ........................................................................................................... 2-5

2.3.3 Valves.......................................................................................................................... 2-6

2.3.4 Pump Controls ............................................................................................................ 2-8

2.3.5 Sump............................................................................................................................ 2-9

2.3.6 Misc............................................................................................................................. 2-9

2.4 Master Leachate Pump Station ........................................................................................ 2-10

2.4.1 Overview ................................................................................................................... 2-10

2.4.2 Design Criteria ......................................................................................................... 2-10

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2.4.3 Pump Station Options ............................................................................................... 2-11

2.5 Leachate Storage Tanks ................................................................................................... 2-13

2.5.1 Overview ................................................................................................................... 2-13

2.5.2 Design Criteria ......................................................................................................... 2-13

2.5.3 Attached Components ............................................................................................... 2-14

2.6 DIW Injection Pump Station............................................................................................ 2-19

2.6.1 Overview ................................................................................................................... 2-19

2.6.2 Design Criteria ......................................................................................................... 2-19

2.6.3 Pump Controls .......................................................................................................... 2-19

2.6.4 Sump.......................................................................................................................... 2-19

2.7 Main Electrical area ......................................................................................................... 2-19

2.7.1 Overview ................................................................................................................... 2-19

2.7.2 Cabinets .................................................................................................................... 2-20

2.7.3 VFDs ......................................................................................................................... 2-21

Section 3 Alternate Operating Procedures ...................... 3-23

3.1 Series Mode ..................................................................................................................... 3-23

3.1.1 Description ................................................................................................................ 3-23

3.2 Direct Injection ................................................................................................................ 3-24

3.2.1 Description ................................................................................................................ 3-24

3.2.2 Steps .......................................................................................................................... 3-24

3.3 Level Switch Checks........................................................................................................ 3-25

3.3.1 Overview ................................................................................................................... 3-25

3.3.2 Steps .......................................................................................................................... 3-25

3.4 Tanker Loading ................................................................................................................ 3-27

3.4.1 Description ................................................................................................................ 3-27

3.4.2 Steps .......................................................................................................................... 3-27

3.5 Sump Pumps .................................................................................................................... 3-28

3.5.1 Description ................................................................................................................ 3-28

3.5.2 LST Sump .................................................................................................................. 3-28

3.5.3 DZMW Sump............................................................................................................. 3-29

3.5.4 DIWLPS area sump................................................................................................... 3-29

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Section 4 Alarms .............................................................. 4-30

4.1 General............................................................................................................................. 4-30

Section 5 Troubleshooting................................................ 5-31

5.1 Overview.......................................................................................................................... 5-31

5.2 Flow Complications ......................................................................................................... 5-32

5.2.1 Injection pump showing running but not showing flow in SCADA .......................... 5-32

5.3 Level Complications ........................................................................................................ 5-33

5.3.1 Level Sensors ............................................................................................................ 5-33

5.4 Pressure Complications .................................................................................................... 5-33

5.5 SCADA Complications.................................................................................................... 5-34

5.6 Power Complications ....................................................................................................... 5-34

5.7 Sump failure ..................................................................................................................... 5-34

5.8 MOV Valve Issues........................................................................................................... 5-34

5.8.1 120V (control) power loss......................................................................................... 5-34

Section 6 Emergency Operation Scenarios ...................... 6-35

6.1 Power Outages ................................................................................................................. 6-35

6.1.1 Deep Injection Well................................................................................................... 6-35

6.1.2 Master Leachate Pump Station................................................................................. 6-35

6.2 Leaks ................................................................................................................................ 6-35

6.3 Pipe Damage .................................................................................................................... 6-35

6.4 Tanks................................................................................................................................ 6-36

6.4.1 Superficial Damages ................................................................................................. 6-36

6.4.2 Tank Seams ............................................................................................................... 6-36

6.4.3 Weather Events ......................................................................................................... 6-36

6.5 SCADA Outages.............................................................................................................. 6-37

6.5.1 Alarms ....................................................................................................................... 6-37

6.5.2 Procedures ................................................................................................................ 6-37

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Section 7 Maintenance ..................................................... 7-38

Section 8 Safety ................................................................ 8-39

Section 9 Limitations........................................................ 9-40

Table of Figures Figure 1 Full Editable Alarm List Link ................................................................................... 1-3

Figure 2 WSA Draft O&M Manual Link ................................................................................ 1-4

Figure 3 Golder O&M Manual Link ........................................................................................ 1-4

Figure 4 Excerpt from Equipment ID Matrix .......................................................................... 1-5

Figure 5 Excerpt from Valve ID Matrix .................................................................................. 1-5

Figure 6 Valve and Equipment ID Matrix Link ...................................................................... 1-5

Figure 7 DIW Valve Location Map (Overview) ..................................................................... 1-6

Figure 8 IPS Valve Location Map (detail) ............................................................................... 1-7

Figure 9 DZMW Valve Location Map (detail)........................................................................ 1-8

Figure 10 Parallel Mode Valving Matrix ................................................................................. 2-2

Figure 11 Single Tank Scenario Valving Matrix..................................................................... 2-1

Figure 12 Tank Draining Scenario Valving Matrix................................................................. 2-3

Figure 13 WSA DIW Monitoring Protocol Link..................................................................... 2-4

Figure 14 DIW FDEP Permit................................................................................................... 2-4

Figure 15 DZMW Upper and Lower Zones ............................................................................ 2-6

Figure 16 DZMW Overall Valve Matrix ................................................................................. 2-7

Figure 17 DZMW Valve Map ISO Diagram........................................................................... 2-8

Figure 18 DZMW Pump Controls ........................................................................................... 2-9

Figure 19 MLPS CC O&M Manual ..................................................................................... 2-10

Figure 20 MLPS Brown and Caldwell SOP Manual ............................................................. 2-10

Figure 21 MLPS 8" Main to DIW Drawings......................................................................... 2-11

Figure 22 MLPS Backup Generator Manual ........................................................................ 2-11

Figure 23 MLPS Pump Station Piping Overview .................................................................. 2-11

Figure 24 Valving for LST/DIW at the MLPS ...................................................................... 2-12

Figure 25 MLPS Valves to Warren Street WRF ................................................................... 2-13

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Figure 26 Annotated Tank Attached Equipment ID Tag Photo ............................................ 2-14

Figure 27 Odor Control Devices............................................................................................ 2-16

Figure 28 Air/Vacuum Relief Valve ...................................................................................... 2-17

Figure 29 LST Overflow Pipe ............................................................................................... 2-18

Figure 30 Circuit Breaker Panels........................................................................................... 2-20

Figure 31 West Electrical Rack ............................................................................................. 2-20

Figure 32 East Electrical Rack............................................................................................... 2-21

Figure 33 Variable Frequency Drives Submittal ................................................................... 2-22

Figure 34 Sump Discharge Line ............................................................................................ 3-28

Figure 35 Example Flowchart................................................................................................ 5-32

Figure 36 Editable Flow Chart (Created in Visio) ................................................................. 5-32

Figure 37 Link to Maintenance Task Matrix ......................................................................... 7-38

March 2023 Collier County Solid Waste Division

Section 1 Introduction

1.1 General

The purpose of this manual is to provide new operators with guidelines to aid in operating the leachate storage and deep injection well system. This guide is meant to serve as a living document which must be updated whenever changes are made to the system. For more in-depth explanations please refer to the full O&M manual for the site.

Leachate in this context can be defined as the liquid that seeps through a landfill, this liquid can originate as rain, byproducts of decomposition or liquids contained in the wastes themselves. This liquid can be contaminated with a wide variety of substances, the deep injection well (DIW) was constructed as a means for disposal of this waste.

The leachate is collected from each of the cells and is sent to the master leachate pump station (MLPS). The MLPS then pumps the leachate to either the DIW system or to the Warren Street WRF. The leachate pumped to the DIW can either be pumped directly down the well, or into the two 50,000 gallon tanks on site. From the onsite storage tanks the leachate is then pumped down into the deep injection well for disposal.

March 2023 Collier County Solid Waste Division

1.2 Deep Injection Well Overview

Collier County Solid & Hazardous Waste Management Division (Collier County) has expanded its waste management facilities to be able to store and/or inject leachate into a Deep Injection Well

(DIW).

The project included installing an 8” leachate forced main from the existing master leachate pump station (MLPS) to feed two 50,000-gallon capacity Leachate Storage Tanks (LSTs). The Injection well Pump Station (IPS) pumps the leachate into the DIW through two 20 HP horizontal centrifugal pumps with a third pump to act as a stand-by. The DIWPS pumps will be equipped with variable frequency drivers (VFDs). The design flow rate for the system is 400 GPM and the discharge pressure at the DIW of 95 ft TDH.

The system also has a Dual Zone Monitoring Well (DZMW) equipped with two 1.5 HP horizontal centrifugal pumps that can take samples from the lower and upper level of the well through a sampling port with the leachate being pumped into the LSTs through a 2” line.

This guide is meant as a general overview for current and future system operators, for more detailed and specific information consult either the O&M above or the other technical resources that can be found embedded in this document. The technical resources and source elements are embedded in this guide as icon objects, to access them you must open this guide in Microsoft Word, then simply double click the icon to open the embedded document. This guide is intended as a living document to refined, added to, corrected, updated, and expanded by and for the operational staff of the Collier County Leachate Storage and Deep Well Injection Facility.

Job number: W219000FL.04 Page 1-2 LST/DIW Operators Manual March 2023 Collier County Solid Waste Division

1.3 Important Contacts

Below is a list of contact information for operators to use if there is a problem with the LST/DIW system. The first line supervisor should always be the first contact. This list should be reviewed at least monthly and updated as needed. Physical copies of this list should be printed out and posted in safe accessible areas, it is also advisable for relevant on call parties to keep a physical copy of this list at home where it is accessible should there be a power or internet outage. Extra space is provided for additional contacts to be added as needed. Some examples are provided but the list must be populated by relevant county staff.

Title Agency Name Primary Phone #

Alternate Phone #

Email Address

DIW/LST

Operator

CC Solid Waste

DIW/LST

Supervisor

CC Solid

Supervisor

Management

- FP&L

Coordinator CC Safety

Fire

Department

CC Sheriff’s dept.

Technical Principal

Consor Engineering

Nick Henslee 602-6791-1101 - nhenslee@consoreng.com

Coordinator FDEP General

Mechanical Service

Warren Street

WRF

Collier County Water Services

Job number: W219000FL.04 Page 1-3 LST/DIW Operators Manual March 2023 Collier County Solid Waste Division

1.4 Alarm Code Cheat Sheet

Below is a list of all the alarms currently set up at for the DIW/LST system. The items listed in blue are the suggested minimum items assigned to the Win911 callout system, this list should be checked and update to reflect current alarms and call out items, a link to the editable master list is also provided below.

Alarm list.xlsx

Figure 1 Full Editable Alarm List Link

Alarm Tag Alarm Description Alarm Tag Alarm Description DIW_PIT_401_HIHI_ALM Lower Monitor Well High High Alarm LST_TK001_HIHI_ALM Leachate Storage Tank 1 High High Alarm DIW_PIT_401_HI_ALM Lower Monitor Well PSI High Alarm LST_SUMP_ALM DIW Storage Tank Area Sump Alarm DIW_PIT_401_LOLO_ALM Lower Monitor Well PSI Low Low Alarm LST_SDV004_ALARM Leachate Storage Tank 2 Outlet Valve Alarm DIW_PIT_401_LO_ALM Lower Monitor Well PSI Low Alarm LST_SDV003_ALARM Leachate Storage Tank 1 Outlet Valve Alarm DIW_PLC_COMM_ERROR Deep Injection Well PLC Communication Error LST_SDV002_ALARM Leachate Storage Tank 2 Inlet Valve Alarm DIW_PUMP_LOW_FLOW_ALARM Deep Injection Well Pump Low Flow Alarm LST_SDV001_ALARM Leachate Storage Tank 1 Inlet Valve Alarm DIW_SAMPLE_SUMP_ALM DIW Sample Area Sump Alarm LFS_CWEATHER_COMM_ERROR Weather Station Comm Error DIW_SDV050_ALARM Deep Injection Well Bypass Valve Alarm DIW_P1_FTR Deep Injection Well Pump 1 Fail to Run S DIW_PIT_301_LO_ALM Upper Monitor Well PSI Low Alarm DIW_P1_FAULT Deep Injection Well Pump 1 Fault Status WMI_ALERT_LS_LIT_LAHH WMI notification of high level alarm LST_TK002_LSL Leachate Storage Tank 2 Low Level Switch WIN911_TEST_BIT This is a test of the Win911 System DBP_COMM_ERROR Diesel Bypass Pump Communication Error DIW_PIT_301_LOLO_ALM Upper Monitor Well PSI Low Low Alarm LFLPS_UPS_LOW_BAT_H UPS Alarm Low Battery LFLPS_DBP_FAULTED BYPASS PUMP FAULTED LFLSP_VALVE_POSITION_ALM Plant and DIW Valve are both Open or Closed LFLPS_DBP_NOT_IN_AUTO BYPASS PUMP NOT IN AUTO LFLPS_PUMP_2_FTS_H Pump 2 Failed to Start WIN911_DAILY_TEST Bit triggered by PLC to test callout. LFS_LPSPLC_COMM_ERROR Leachate Pump Station PLC Comms Loss DIW_PIT_301_HI_ALM Upper Monitor Well PSI High Alarm LFLPS_PUMP_2_FTSTP_H Pump 2 Failed to Stop DIW_PIT_301_HIHI_ALM Upper Monitor Well High High Alarm LFLPS_PUMP_1_FTS_H Pump 1 Failed to Start DIW_P3_NO_FLOW_ALARM Deep Injection Well Pump 3 No Flow Alarm LFLPS_PUMP_1_FTSTP_H Pump 1 Failed to Stop LST_TK002_LSH Leachate Storage Tank 2 High Level Switc LFLPS_PLC_MAIN_PFR_H Lift Station Power Fail Alarm DIW_P3_FTR Deep Injection Well Pump 3 Fail to Run S LFLPS_PLC_FLT_H LCP1000 PLC IS IN FAULT DIW_P3_FAULT Deep Injection Well Pump 3 Fault Status LFLPS_PLANT_VALVE_FAIL_TO_OPEN Effluent Valve to WW Plant Fail to Open Alarm LFLPS_INF_NWVLV_COMMS NW Influent Valve HART Comms Alarm LFLPS_PLANT_VALVE_FAIL_TO_CLOSE Effluent Valve to WW Plant Fail to Close Alarm DIW_P2_NO_FLOW_ALARM Deep Injection Well Pump 2 No Flow Alarm LFLPS_PHASE_FLT_H LCP POWER PHASE FAILURE DIW_P2_FTR Deep Injection Well Pump 2 Fail to Run S LFLPS_P1012_SLR_H Pump 2 Seal Leak LFLPS_INF_SEVLV_COMMS SE Influent Valve HART Comms Alarm LFLPS_P1012_OTR_H Pump 2 Overtemp DIW_P2_FAULT Deep Injection Well Pump 2 Fault Status LFLPS_P1012_FLT_H Pump 2 Failure DIW_P1_NO_FLOW_ALARM Deep Injection Well Pump 1 No Flow Alarm LFLPS_P1011_SLR_H Pump 1 Seal Leak LST_TK002_LO_ALM Leachate Storage Tank 2 Low Alarm LFLPS_P1011_FLT_H Pump 1 Failure LST_TK002_LOLO_ALM Leachate Storage Tank 2 Low Low Alarm LFLPS_LSH_1000_H Lift Station High Level Alarm (Float) LST_TK002_HI_ALM Leachate Storage Tank 2 High Alarm LFLPS_INF_VLV_FTCLS_H Influent Valve Failed to Closed Alarm WMI_DAILY_TEST Test bit for WMI email testing LFLPS_FLOW_FLT_H Flow Signal Error LST_TK002_HIHI_ALM Leachate Storage Tank 2 High High Alarm LFLPS_DOOR_H LCP DOOR OPENED LST_TK001_LSL Leachate Storage Tank 1 Low Level Switch PRESSURE_HIGH DIW Pressure Hi Hi LST_TK001_LSH Leachate Storage Tank 1 High Level Switc LFLPS_DIW_VALVE_FAIL_TO_OPEN Effluent Valve to DIW Fail to Open Alarm LST_TK001_LO_ALM Leachate Storage Tank 1 Low Alarm LFLPS_DIW_VALVE_FAIL_TO_CLOSE Effluent Valve to DIW Fail to Close Alarm LST_TK001_LOLO_ALM Leachate Storage Tank 1 Low Low Alarm LFLPS_1012_AMP_FLT_H Pump 2 Amps Error LST_TK001_HI_ALM Leachate Storage Tank 1 High Alarm LFLPS_1011_AMP_FLT_H Pump 1 Amps Error

LFLPS_P1011_OTR_H Pump 1 Overtemp

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1.6 Design Criteria

The full design criteria for the system can be found in section 3 of the O&M submitted by WSA engineering in the link below:

Figure 2 WSA Draft O&M Manual Link

Additional process information and drawings can be found in the Golder submitted operational and control philosophy linked below:

D1A6F755.pdf

Figure 3 Golder O&M Manual Link

This guide is meant as a general overview for current and future system operators, for more detailed and specific information consult either the O&M above or the other technical resources that can be found embedded in this document. The following list contains elements that are not specifically listed in the technical specifications but are observed through experience running the system. This list should be checked regularly and updated if conditions change.

While it should never be intentionally used, it is worth noting that the LST containment area has a liquid capacity in excess of 125,000 gallons.

Each injection pumps were capable of injecting flows of around 400 GPM when new, however, this will inevitably diminish as the impellers wear down over time. Running more than one pump at a time will have a diminishing return, for example, during initial testing running two pumps at a time only produced around 700 GPM of flow and running three pumps (never advisable under normal circumstances) only produced around 900 GPM of flow.

The dual zone pumps will always flow at different rates as the deeper well has greater artesian pressure than the shallow well. During initial testing, these rates were around 30 and 50 GPM respectively.

Job number: W219000FL.04 Page 1-5 LST/DIW Operators Manual March 2023 Collier County Solid Waste Division

1.7 System Tags

As part of this SOP project, Consor was asked to develop a cohesive list of asset tags to identify important system components and equipment. The full list is embedded in this document and can be accessed using the link below. The excel sheet is set up to automatically populate asset tag style identifiers based on the user entered parameters so that they can easily be altered or updated should the need arise. For clarity, the lists of equipment and valves are separated into separate tabs. The sheet also contains preprogramed forms for the list of valves involved in changing the system to a variety of different operating modes, to use these forms only the valve number on the left side of the main list is needed, the remaining information will populate the remaining fields automatically.

Figure 4 Excerpt from Equipment ID Matrix

Figure 5 Excerpt from Valve ID Matrix

Valve and Equiptment Matrix R

Figure 6 Valve and Equipment ID Matrix Link

Number Eqpt

ASSOC

Function Description Location Long

Location Short

Instance ID Tag

1 T1 LIT Tank 1 level radar level indicator Top of tank 1 LST 001 LST-LIT-T1-001 2 T2 LIT Tank 2 level radar level indicator Top of tank 2 LST 002 LST-LIT-T2-002 3 T1 LS Tank 1 high level switch NW side of tank 1 LST 001 LST-LS-T1-001 4 T1 LS Tank 1 low level switch NW side of tank 1 LST 002 LST-LS-T1-002 5 T2 LS Tank 2 high level switch NW side of tank 2 LST 003 LST-LS-T2-003 6 T2 LS Tank 2 low level switch NW side of tank 2 LST 004 LST-LS-T2-004 7 T1 LG Tank 1 mechanical level gauge North side of tank 1 LST 001 LST-LG-T1-001 8 T1 LG Tank 1 mechanical level gauge North side of tank 2 LST 002 LST-LG-T1-002 9 IP1 LS Injection pump 1 flow switch Injection pump pad south IPS 005 IPS-LS-IP1-005 10 IP2 LS Injection pump 2 flow switch Injection pump pad center IPS 006 IPS-LS-IP2-006 11 IP3 LS Injection pump 3 flow switch Injection pump pad north IPS 007 IPS-LS-IP3-007

Collier County DIW Master Equipment Matrix AG: Analog Gauge DD: Digital Discrete IPS: Injection Pump Station MELP: Main Electrical Pad PW: Pulse Width (Modulating) ARV: Air Releif Valve DIW: Deep Injection Well LG: Level Gauge MS: Motor Starter SFST: Soft Start CMB: Combiniation air/vacuum DPG: Digital Pressure Gauge LIT: Level Indicating Transmitter P: Pump TMP: Temperature gauge CPMP: Centrifugal Pump DZMW: Dual Zone Monitoring Well LS: Level Switch PG: Pressure Guage VFD: Variable Frequency Drive DA: Digital Analog FLW: Flow Meter LST: Leachate Storage Tank PIT: Pressure Indicating Transmitter

Number Size

(Inches) Type Description Location Long

Location Short

Instance ID Tag

1 6 MOV Tank one influent valve SE of LSTs LST 001 LST-MOV-6-001 2 6 MOV Tank two influent valve SE of LSTs LST 002 LST-MOV-6-002 3 6 GV Tank two influent valve SE side of tank 2 LST 003 LST-GV-6-003 4 6 GV Tank one influent valve SE side of tank 1 LST 004 LST-GV-6-004 5 6 GV Tank one effluent valve NE side of tank 1 LST 005 LST-GV-6-005 6 6 GV Tank two effluent valve NE side of tank 2 LST 006 LST-GV-6-006 7 6 MOV Tank two effluent valve NE of LSTs LST 007 LST-MOV-6-007 8 6 MOV Tank one effluent valve NE of LSTs LST 008 LST-MOV-6-008 9 4 GV Pump 1 influent valve Injection pump pad south IPS 001 IPS-GV-4-001 10 4 GV Pump 2 influent valve Injection pump pad center IPS 002 IPS-GV-4-002 11 4 GV Pump 3 influent valve Injection pump pad north IPS 003 IPS-GV-4-003

Collier County DIW Master Valving Matrix MOV: Motor Operated Valve GV: Gate Valve CV: Check Valve BFV: Butterfly Valve BV: Ball Valve SGV SubGrade Valve PGV: Plug Valve

Job number: W219000FL.04 Page 1-6 LST/DIW Operators Manual March 2023 Collier County Solid Waste Division

1.8 Valve Locations

Below are several drawings that show the location of the valves listed by tag number for the DIW and MLPS:

Figure 7 DIW Valve Location Map (Overview)

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Figure 8 IPS Valve Location Map (detail)

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Figure 9 DZMW Valve Location Map (detail)

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Section 2 Standard Operating Procedures

2.1 Operating Scenarios

2.1.1 Parallel Scenario

2.1.1.1 Description

The parallel operating scenario refers to the configuration of the storage tanks. In this configuration both tanks are tied together through the pipework in such a way that they behave as a single tank, the levels in each tank should remain parallel.

The primary difference between this scenario and the others are that volume of leachate per foot of tank level change is doubled (roughly 4,000 gallons per foot). The tanks are connected through both the influent and effluent valve manifolds.

Under current settings, while operating in parallel mode the MLPS submersible pumps should come on at their set float levels [find out what these levels are] and begin filling the LSTs. Both tanks should fill and empty at roughly the same rate (the east tank may be slightly faster initially due to proximity to the header). When the tanks reach a level of 12 feet, the lead injection pump should turn on and drain both tanks to a level of 4 feet as determined by the lead level sensor before shutting off. After the pump shuts off, the “lead” designation in SCADA should switch to the next available pump in the sequence.

2.1.1.2 Steps

The parallel set up may be achieved from an initial starting point of any state, for purposes of clarity the steps below must assume that the initial state of the system is with all valves closed and all pumping systems off. All valves must be opened in the same order given by the valving table, any valve not on the valving table should be closed when running the system in parallel mode.

Steps:

1. Ensure that all pumping systems are off, that all system MOVs have power and are in AUTO control, and that all valves not listed in the table below are closed, DO NOT assume that they are closed.

2. Open the MANUAL valves listed in the table below in the order given.

3. Select “parallel” in the mode section of the SCADA system, select either tank as lead, and give the system the start command. Verify that the MOVs listed in the valving table below open and that the others remain closed, see the SCADA section below the valving table for details and screenshots.

4. Note the start time in the log and monitor the system for proper operation as described above.

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2.1.1.3 Valves

Figure 10 Parallel Mode Valving Matrix

2.1.1.4 SCADA

To run in parallel mode all four tank valves should be in auto and both tanks should be set as “in service.”

Number Size

(Inches) Type Description Location Long

Location Short

ID Tag Image

43 6 GV MLPS to DIW At MLPS MLPS MLPS-GV-6-001 0 44 6 MOV MLPS to DIW At MLPS MLPS MLPS-MOV-6-002 0 47 8 SGV Leachate transmition line iso Along transmission line @ landfill wesr road 1 MLPS MLPS-SGV-8-005 0 48 8 SGV Leachate transmition line iso Along transmission line @ landfill west road 2 MLPS MLPS-SGV-8-006 0 49 8 SGV Leachate transmition line iso Along transmission line @ landfill west road 3 MLPS MLPS-SGV-8-007 0 50 8 SGV Leachate transmition line iso Along transmission line @ landfill west road 4 MLPS MLPS-SGV-8-008 0 1 6 MOV Tank one influent valve SE of LSTs LST LST-MOV-6-001 0 2 6 MOV Tank two influent valve SE of LSTs LST LST-MOV-6-002 0 3 6 GV Tank two influent valve SE side of tank 2 LST LST-GV-6-003 0 4 6 GV Tank one influent valve SE side of tank 1 LST LST-GV-6-004 0 5 6 GV Tank one effluent valve NE side of tank 1 LST LST-GV-6-005 0 6 6 GV Tank two effluent valve NE side of tank 2 LST LST-GV-6-006 0 7 6 MOV Tank two effluent valve NE of LSTs LST LST-MOV-6-007 0 8 6 MOV Tank one effluent valve NE of LSTs LST LST-MOV-6-008 0 9 4 GV Pump 1 influent valve Injection pump pad south IPS IPS-GV-4-001 0

10 4 GV Pump 2 influent valve Injection pump pad center IPS IPS-GV-4-002 0 11 4 GV Pump 3 influent valve Injection pump pad north IPS IPS-GV-4-003 0 15 6 GV Injection pump header effluent Injection pump pad near flow meter IPS IPS-GV-6-007 0 16 8 GV Injection manifold valve NE corner of exposed 8" pipework DIW DIW-GV-8-001 0 17 8 GV DIW inlet isolation Directly east of the wellhead DIW DIW-GV-8-002 0 43 6 GV MLPS to DIW At MLPS MLPS MLPS-GV-6-001 0 26 3 GV Sump Discharge valve to Tank 1 NE of LST 2 LST LST-GV-3-012 0 27 3 GV Sump Discharge valve to Tank 2 NE of LST 2 LST LST-GV-3-013 0

Collier County DIW Parallel Mode Valving Matrix

Job number: W219000FL.04 Page 2-1 LST/DIW Operators Manual March 2023 Collier County Solid Waste Division

2.1.2 Single Tank Scenario

2.1.2.1 Description

The single tank scenario is one where either of the leachate storage tanks are in operation alone.

This will most likely be the case when one tank is out for cleaning or repairs. At this time, it may also be necessary to manually drain the tank being taken out of service. For instructions on manually draining a tank see the next section titled “draining a single tank” later in this document.

2.1.2.2 Steps

For the purposes of this guide, we will assume that the single tank scenario is being transitioned to from the parallel operation mode as this is the standard operation mode for the system. For clarity, this section will also assume that tank 1 is being taken out of service, to take tank 2 out of service it is the same operation with the exception that the tank two valves are closed instead of tank 1. Valving tables for taking either tank out of service will be provided.

Steps:

1. While operating in parallel mode open SCADA and switch the tank to be taken offline from “in service” to “out of service.”

2. This should cause the MOV influent and effluent valves for the tank being taken offline to close and the duty level sensor to switch to the in-service tank. Verify in the field that this has occurred.

3. Close and tag out the manual valves for the tank being taken out of service.

4. Close and tag out the sump valves for the tank to be taken out of service.

5. Turn off and tag out the MOV valves for the tank being taken out of service.

2.1.2.3 Valves

Figure 11 Single Tank Scenario Valving Matrix

Number Size

(Inches) Type Description Location Long

Location Short

Instance ID Tag Image

1 6 MOV Tank one influent valve SE of LSTs LST 1 LST-MOV-6-001 0 4 6 GV Tank one influent valve SE side of tank 1 LST 4 LST-GV-6-004 0 5 6 GV Tank one effluent valve NE side of tank 1 LST 5 LST-GV-6-005 0 8 6 MOV Tank one effluent valve NE of LSTs LST 8 LST-MOV-6-008 0 9 4 GV Pump 1 influent valve Injection pump pad south IPS 1 IPS-GV-4-001 0

10 4 GV Pump 2 influent valve Injection pump pad center IPS 2 IPS-GV-4-002 0 11 4 GV Pump 3 influent valve Injection pump pad north IPS 3 IPS-GV-4-003 0 15 6 GV Injection pump header effluent Injection pump pad near flow meter IPS 7 IPS-GV-6-007 0 16 8 GV Injection manifold valve NE corner of exposed 8" pipework DIW 1 DIW-GV-8-001 0 17 8 GV DIW inlet isolation Directly east of the wellhead DIW 2 DIW-GV-8-002 0 18 8 GV DIW Wellhead shutoff Directly on top of the wellhead DIW 3 DIW-GV-8-003 0

Collier County DIW Master Valving Matrix

Job number: W219000FL.04 Page 2-2 LST/DIW Operators Manual March 2023 Collier County Solid Waste Division

2.1.3 Draining a single tank

2.1.3.1 Description

This section covers how to drain a single tank. This will typically occur to allow for cleaning or repair of one of the leachate storage tanks. This procedure involves first draining both tanks, then isolating and draining the tank coming out of service using the injection pumps at a lower rate to reduce vortexing and subsequent air intrusion. After pumping the tank down as far as it can go, the other tank is returned to service and the remaining liquid is removed from the desired tank using the 1” drain and/or a submersible pump through the manway.

2.1.3.2 Steps

For the purposes of this guide, we will assume that the single tank scenario is being transitioned to from the parallel operation mode as this is the standard operation mode for the system.

Steps:

1. Manually start a pump down cycle through SCADA. (See the “manual pump down” section later in this guide)

2. While operating in parallel mode open SCADA select the tank to be taken offline and switch it to “out of Service.”

3. This should cause the MOV influent and effluent valves for the tank being taken offline to close. Verify in the field that this has occurred.

4. Close the manual inlet and sump inlet valves for the tank being taken out of service.

5. Turn off and tag out the inlet MOV valve for the tank being taken out of service.

6. Place all injection pumps in local manual off position.

7. Close the manual, MOV, or both outlets from the tank that is to remain in service.

8. Start any one of the injection pumps, reduce the flow rate down to around 150 GPM (this can be done either through the VFD or by slowly pinching down on the pump effluent manifold valve until the desired flow is achieved.

9. Pump down the tank that is to be taken out of service until the injection pump begins taking on air (around 1.5 – 2 feet) there will be an obvious sound change at the pump when this begins to happen. When air is heard shut the pump off.

10. Close both the manual and MOV effluent valves on the tank coming out of service.

11. Reopen both the manual and MOV effluent valves for the tank remaining in service.

12. Put all of the injection pumps back into automatic control.

13. At this point, the remaining volume in the tank can be drained in a variety of ways. Opening the 1” drain valve will take the tank down to about 8”. Alternatively, the manway can be unbolted and opened, and the rest can be drained using a submersible pump.

Job number: W219000FL.04 Page 2-3 LST/DIW Operators Manual March 2023 Collier County Solid Waste Division

2.1.3.3 Valves

Figure 12 Tank Draining Scenario Valving Matrix

2.1.3.4 Misc.

Safety: These tanks should be considered a permit required confined space, entry will require lockout tagout, atmospheric monitoring, and other appropriate measures such as forced ventilation.

2.1.4 Manual Pump Down

2.1.4.1 Description

The manual pump down function is designed to initiate the normal tank draining sequence prior to the tank level reaching the operator designated high level. The function is completed through SCADA with a single button. Assuming that the system has already been set up to one of the normal operational modes no additional valving will be needed. If the system is not already set up, see the “parallel mode” section earlier in this document.

2.1.4.2 Steps

1. Open SCADA

2. Ensure that low tank stop level is at desired elevation.

3. Click the manual pump down button shown below and monitor for proper operation.

2.2 Compliance

2.2.1 Introduction

The leachate injection process is regulated by the Florida Department of Environmental Protection (FDEP) and requires a variety of samples to be taken and analyzed at various intervals. There are two primary places this process is monitored; one is at the injection well itself where the back

Number Size

(Inches) Type Description Location Long

Location Short

Instance ID Tag Image

1 6 MOV Tank one influent valve SE of LSTs LST 1 LST-MOV-6-001 0 2 6 MOV Tank two influent valve SE of LSTs LST 2 LST-MOV-6-002 0 3 6 GV Tank two influent valve SE side of tank 2 LST 3 LST-GV-6-003 0 4 6 GV Tank one influent valve SE side of tank 1 LST 4 LST-GV-6-004 0 5 6 GV Tank one effluent valve NE side of tank 1 LST 5 LST-GV-6-005 0 6 6 GV Tank two effluent valve NE side of tank 2 LST 6 LST-GV-6-006 0 7 6 MOV Tank two effluent valve NE of LSTs LST 7 LST-MOV-6-007 0 8 6 MOV Tank one effluent valve NE of LSTs LST 8 LST-MOV-6-008 0 9 4 GV Pump 1 influent valve Injection pump pad south IPS 1 IPS-GV-4-001 0

10 4 GV Pump 2 influent valve Injection pump pad center IPS 2 IPS-GV-4-002 0 11 4 GV Pump 3 influent valve Injection pump pad north IPS 3 IPS-GV-4-003 0 15 6 GV Injection pump header effluent Injection pump pad near flow meter IPS 7 IPS-GV-6-007 0 16 8 GV Injection manifold valve NE corner of exposed 8" pipework DIW 1 DIW-GV-8-001 0 17 8 GV DIW inlet isolation Directly east of the wellhead DIW 2 DIW-GV-8-002 0 18 8 GV DIW Wellhead shutoff Directly on top of the wellhead DIW 3 DIW-GV-8-003 0 26 3 GV Sump Discharge valve to Tank 1 NE of LST 2 LST 12 LST-GV-3-012 0 27 3 GV Sump Discharge valve to Tank 2 NE of LST 2 LST 13 LST-GV-3-013 0

Collier County DIW Master Valving Matrix

Job number: W219000FL.04 Page 2-4 LST/DIW Operators Manual March 2023 Collier County Solid Waste Division pressure from the well and the liquid being pumped in are monitored, the second is at the Dual Zone Monitoring Well (DZMW) where similar parameters are monitored.

2.2.2 Testing intervals

Under current preliminary permit conditions, the average maximum and minimum pressure at both the deep injection well and both levels of the DZMW must be monitored continuously. This is done automatically using Rosemount pressure sensors mounted at each well head and captured by the historian in SCADA. In the event of a communications failure manual readings may be required.

Both the DIW and DZMW also require liquid samples to be pulled and analyzed monthly.

2.2.3 Locations

The leachate is sampled form the port located [Insert current sampling location] The upper dual zone is sampled from the port located [Insert current sampling location] The lower dual zone is sampled from the port located [Insert current sampling location]

2.2.4 Sampling Procedures

The sampling procedures are covered in greater depth in the document embedded below provided by Water Science Associates, who is currently conducting the sampling under contract with the County. It is anticipated that sometime after the completion of this document that this duty will be turned over to County operations staff, this section and attachments may need to be updated at that time.

DIW Monitoring Protocol - Copy.docx

Figure 13 WSA DIW Monitoring Protocol Link

For reference, a copy of the most recent FDEP operating permit for the DIW can be found in the link below:

Figure 14 DIW FDEP Permit

Job number: W219000FL.04 Page 2-5 LST/DIW Operators Manual March 2023 Collier County Solid Waste Division

2.3 Dual Zone Monitoring Well (DZMW)

2.3.1 Overview

The dual zone monitoring well is located due east of the leachate storage tank containment area.

The purpose of the DZMW is to monitor the conditions of the groundwater at two different depths above the deep injection well to ensure that none of the material being injected is seeping upwards into the upper aquifers which are often used for drinking water and agriculture.

There are three two-inch lines leaving the DZMW area, one for each pump and one for the area sump. All three of these lines come together with the line from the LST area sump and come up from the ground as the three-inch line adjacent to the six-inch LST discharge lines located due west of the DZMW area. These three-inch lines then rise around eighteen feet up and discharge into the side of the LST tanks. It is important to keep this in mind, especially if the LST tanks are being run in bypass without the injection pumps, as the tanks can be overfilled by the sumps, the sample pumps, or both.

2.3.2 Design Criteria

The DZMW consists of two separate wells within the same casing. The first well, called the upper zone is in the larger diameter casing set at a depth of 1,055 feet. It may be a bit counter intuitive being the shallowest well, but the upper zone is the one that pumps out slower. This is due to hydrology, particularly a difference in the artesin pressure at different depths in different geologic formations here in Florida. The second casing is a smaller diameter, referred to as the lower zone, is set a depth of 1,338 feet. Both pumps use the same 2 hp motors but have slightly different size impellers. For more detailed information on the pumps and set up, please refer to the Golder specifications in the appendix of this document.

Job number: W219000FL.04 Page 2-6 LST/DIW Operators Manual March 2023 Collier County Solid Waste Division

Figure 15 DZMW Upper and Lower Zones

2.3.3 Valves

2.3.3.1 Sampling/purging Steps.

To set the pumps up for the pre sampling purge simply open all the valves on the valve list below (the valve for the sump and the main 3-inch sump line valves should always be open unless maintenance is being conducted). If only running one pump, be sure to close the valves on the non-running pump. Once the purge is completed there is a sample port on the underside of each pipeline near the pump that can be opened to begin pre sample testing and to take samples. Once sampling is completed stop the pump and close all valves except for the sump valve.

Job number: W219000FL.04 Page 2-7 LST/DIW Operators Manual March 2023 Collier County Solid Waste Division

2.3.3.2 DZMW Valve list

Figure 16 DZMW Overall Valve Matrix

Number Size

(Inches) Type Description Location Long

Location Short

Instance ID Tag

28 2 BV DZMW Lower Shut off At DZMW head DZMW 1 DZMW-BV-2-001 29 2 BV DZMW Upper Shut off At DZMW head DZMW 2 DZMW-BV-2-002 30 2 BV DZMW Lower pump suction isolation At DZMW north of lower pump DZMW 3 DZMW-BV-2-003 31 2 BV DZMW Upper pump suction isolation At DZMW north of upper pump DZMW 4 DZMW-BV-2-004 32 2 CV DZMW Lower pump discharge check At DZMW south of lower pump DZMW 5 DZMW-CV-2-005 33 2 CV DZMW Upper pump discharge check At DZMW south of upper pump DZMW 6 DZMW-CV-2-006 34 2 CV DZMW sump pump discharge check At DZMW south of sump pump DZMW 7 DZMW-CV-2-007 35 2 BV DZMW Lower pump discharge At DZMW south of lower pump DZMW 8 DZMW-BV-2-008 36 2 BV DZMW Upper pump discharge At DZMW south of upper pump DZMW 9 DZMW-BV-2-009 37 2 BV DZMW sump pump discharge isolation At DZMW south of sump pump DZMW 10 DZMW-BV-2-0010 11 4 GV Pump 3 influent valve Injection pump pad north IPS 3 IPS-GV-4-003 15 6 GV Injection pump header effluent Injection pump pad near flow meter IPS 7 IPS-GV-6-007 16 8 GV Injection manifold valve NE corner of exposed 8" pipework DIW 1 DIW-GV-8-001 17 8 GV DIW inlet isolation Directly east of the wellhead DIW 2 DIW-GV-8-002 43 6 GV MLPS to DIW At MLPS MLPS 1 MLPS-GV-6-001 26 3 GV Sump Discharge valve to Tank 1 NE of LST 2 LST 12 LST-GV-3-012 27 3 GV Sump Discharge valve to Tank 2 NE of LST 2 LST 13 LST-GV-3-013

Collier County DZMW Vale Matrix

Job number: W219000FL.04 Page 2-8 LST/DIW Operators Manual

2.3.3.3 DZMW valve map

Figure 17 DZMW Valve Map ISO Diagram

2.3.4 Pump Controls

The DZMW well pumps can only be started and stopped in local control. The controls for the pumps are located on the electrical rack just west of the containment area around the well (see Figure 18 below). For each pump there are three valves that must be opened before starting the pump, one at the wellhead, one on the suction side of the pump, and one on the discharge header just south of the pumps.