W912P611R00080001_IHCCDF_FACILITY OPS_AMD0004_Specs.pdf

IHC CDF Facility Operations & Dredging W912P6-11-R-0008 signs and suitable and efficient lights at all points of entry to the section or sections of roadway which are to be closed to public travel during dredging operations under the contract. The Contractor shall also furnish flagmen and watchmen to warn and direct traffic or to prevent travel on any portion of roadways during the periods in which operations under the contract are performed as may be required to ensure safety and prevent accidents. All facilities furnished by the Contractor under this paragraph shall be as prescribed by local highway authorities and shall be subject to approval by the Contracting Officer. Traffic control shall be in accordance with the Indiana Manual on Uniform Traffic Control Devices and with the USACE Safety and Health Requirements Manual, EM 385-1-1. Separate payment shall not be made for any costs incurred by the Contractor in compliance with the provisions of this paragraph but all costs therefore shall be considered as a subsidiary obligation of the Contractor and are included in the contract price for other contract items as applicable.

1.24 TRAFFIC CONTROL

The Contractor is responsible for all required traffic control and coordination associated with Contract activities. In particular, the Contractor is responsible for all coordination and activities that require the raising of drawbridges along the Indiana Harbor and Ship Canal navigational channel length, or that require staging and coordinating vessel traffic around bridge crossings. The Contractor is responsible for contacting the bridge owners or operators given in Table 2, and for coordinating openings of any bridges as required for dredging operations.

The contractor shall coordinate with City of East Chicago Emergency Responders regarding bridge openings and road closures.

In addition to bridges, the Contractor shall coordinate with British Petroleum to move existing oil booms at Indianapolis Boulevard when barges go through. The western most end of the dockface along the Lake George Branch contains existing oil booms that may not be disturbed; the Contractor may not stage vessels in areas with oil booms and may not disturb oil booms. The western most end of the dock face, where the Contractor may not work, is shown on the the plans. The area where no vessels may dock is approximately 700' long measured from the west property line.

The Contractor shall coordinate with INDOT, BP, and any other necessary parties as needed to allow for the trasnport of sediment from the dredge location to the Confined Disposal Facility. The coordination effort for boom removal, bridge opening, or other obstructions is the responsibility of the Contractor. Any delays in the coordination efforts shall be borne 100% by the Contractor and shall not increase the contract in any bid item.

1.24.1 Bridge Contact Information

The Contractor is responsible for all routine coordination with the bridge owners and operators and with the oil boom operators. All bridge openings must be done in accordance with the requirements of the bridge owner/operator. The contact information for the various bridges along the canal is provided in Table 3; this information is provided for the Contractor's convenience and may not be complete or current. The available physical data on the bridges is given in Table 2. The Contractor is advised that bridge opening requirements, and bridge construction activities may change over time. In addition, active construction may occur on one or more bridges along the canal during the life of this contract, and it is anticipated that the oil boom configuration (operated

SECTION 01 10 00.00 03 - Page 15

AMD-0004

1.7 PAYMENT

Payment of the task under this section is discussed in

SECTION 01 22 00.00 .3 1.1.12.1.

1.8 NOTIFICATION

The Contracting Officer shall be notified of any operational concerns or deficiencies related to the Gradient Control System.

1.9 O&M DATA MANAGEMENT

The SCADA system that controls the GCS captures operational data. The Contractor shall collect and provide this data to the Government in the form of Weekly Reporting. Use of the website as described in SECTION 27 26 26 to transmit data is recommended. The weekly reports shall capture daily well trending data, daily reports including hourly pump run time and total estimated volume pumped, volume pumped by the liftstations, and the alarm log as automatically captured by the SCADA system.

Once a month, Field Logs shall be submitted to the Government by the Contractor. The Field Logs will consist of the Weekly Reports for the month provided on compact disc as well as any operator notes, pump maintenance schedules, pressure transducer or ultrasonic sensor maintenance schedules, collection header cleanout records, and lift station maintenance schedules. Any deficiencies with the system and resolutions shall also be recorded in the Field Logs.

1.10 EMERGENCY OPERATIONS

The Contractor shall submit for review the Emergency Procedures for equipment malfunctions that would require a full or partial shut down of the system to prevent damage to equipment. Examples may include a failure at a lift station or the inability for the CDF or treatment plant to accept groundwater. Include Emergency Shutdown Instructions for fire, explosion, spills, or other foreseeable contingencies. Provide guidance and procedures for emergency operation of all utility systems. Should system alarms activate during off-duty hours, the persons or positions responsible for checking, receiving, and answering alarms shall be provide. Provide procedures to restart the system once the emergency has passed.

PART 2 PRODUCTS

2.1 FLOWMETERS

The Contractor shall provide a tamper-proof totalizing flowmeter on the discharge line of each lift stations to indicate the instantaneous flow rate and to record the total volume of water discharged per day. The flowmeter shall have an accuracy of +/- 0.5%. The flowmeter will be placed in an area so that it can be read by a representative of the Contracting Officer at any time.

PART 3 EXECUTION

3.1 SYSTEM OPERATION AND MAINTENANCE

The Contractor shall be required to perform all activities needed to operate the system per the performance requirements, maintain the system as to keep all equipment in working condition per manufacturer requirements, SECTION 33 24 13.02 03 - Page 4 and to make repairs and replacements as needed. When available, the O&M Manual will discuss the following activities in detail.

3.1.1 Extraction Wells

There are 88 extraction wells in the Gradient Control System (GCS). Each well consists of a well casing, well screen, filter pack, bentonite seal and grout, protective covers, a concrete pad and vault, KPSI Series 320 level transducer manufactured by Esterline Pressure Systems, Model 320S34B0A027.404014.402A10036B, and a Grundfos REDI-FLO3 submersible pump.

Each well shall be kept in good working condition and the pump and transducer shall be calibrated and maintained per the manufacturer's recommendations. A status box to adjust the pumping rate for the submersible pump and to communicate with the motor shall be provided to the Contractor.

3.1.2 Monitoring Wells

There are 40 monitoring wells in the GCS system. Each well consists of a well casing, well screen, filter pack, bentonite seal and grout, protective covers, a concrete pad and vault, and an KPSI Series 320 level transducer manufactured by Esterline Pressure Systems, Model 320S34B0A027.404014.402A10036B. Each well shall be kept in good working condition and the transducer shall be calibrated and maintained per the manufacture's recommendations. The 4 monitoring wells on the southern edge of the site are linked to 2 Endress & Hauser Prosonic S FMU90 ultrasonic sensors that hang from the canal wall. The ultrasonic sensors shall also be calibrated and maintained per the manufacturer's recommendations.

3.1.3 Collection Header & Clean Outs

Each of the 88 extraction wells pumps water into a collection header. The 12 inch collection header pipe acts as a gravity drain circling the entire site. Manholes placed at roughly every 500 feet allow access to the header. The entire collection header shall be cleaned semi-annually by the Contractor. There is also inlets from the debris pad, concrete crane pad, and decontamination pad, which drain into the collection header. The pad-clean outs will require more frequent cleanings during dredging cycles and shall be the responsibility of the Contractor.

3.1.4 Lift Stations

Each lift station contains 2 ABS Group pumps, Model AFP 1546 M 90. Each lift station shall be kept in good working condition and the pumps shall be maintained per the manufacture's recommendations. Repairs and replacement of the lift station pumps shall be the responsibility of the Contractor.

3.1.4.1 Flow Monitoring

The Contractor shall record a daily flow measurement from the totalizing flowmeter at each lift station. The daily flow measurements will be documented in the Weekly Reporting . This information will be carried over into the monthly Field Logs. The total groundwater volume extracted shall also be reported to IDNR annually as part of IDNR's Pump Registration requirements.

SECTION 33 24 13.02 03 - Page 5

3.1.5 Local Control Panels

Eight Local Control Panels (LCP) enclose the power and fuse terminal block, local pump switches, motor current sensors, Ethernet switch, main power taps, motor breakers and motor relays. Monthly maintenance checks of the LCP's is required. The maintenance checks shall include but is not limited to checking each unit air conditioner, including compressor, air inlet, and condenser and evaporator air movers; UPS battery; power conditions; indicator lights, including test light; and cabinet conditions, including checking for damage, excessive dirt or moisture, conduits and connectors, and mounting bolts. The current sensor of each LCP will also be calibrated.

A barometric pressure sensor at LCP 7 houses a OMEGA PX409 barometric pressure transducer. The this transducer shall be maintained to the manufacturer's recommendations.

3.1.6 Radio System

Monthly maintenance checks of the radio system will include but is not limited to checking the base for loose or missing bolts, checking the condition of the pole or stand for damage, and checking for any loose or damaged conduits. The antenna shall also be checked for damage to the mounting bracket, aliment, surge protector box, and ground wires.

3.1.7 Central Control Station

Monthly maintenance of the central control station shall include but is not limited to the UPS battery, the Cat5 cables, and the LAN switches.

3.1.8 System Alarms

Alarms produced by the GCS shall be responded to within 24 hours unless otherwise directed by the COR.

-- End of Section --

SECTION 33 24 13.02 03 - Page 6 separating debris and dredged sediment. Debris may be separated from dredged sediment at the point of dredging or at the point of off-loadiing.

The Contractor is responsible for proposing the procedures, equipment, labor and all other necessary items.

3.4 DISPOSAL OF DREDGED SEDIMENT

3.4.1 Water Sources

To the extent possible, the Contractor must use water recirculated from the CDF pond for hydraulic off-loading of sediment. If no pond or insufficient pond exists, the Contractor may use water from the Lake George Branch of the Indiana Harbor Ship Canal, as approved by the COR. The Contractor must provide all pumps and piping for obtaining water from any source. If water will be used from the canal, the Contractor must register all pumps with the State of Indiana Department of Natural Resources, and must provide the Government with a copy of the registration. The Contractor shall record the volume of water pumped from the canal and incorporate it into the integrated data management system as described in Section 27 26 26 DATA COMMUNICATIONS INTEGRATION REQUIREMENTS. The Contractor is responsible for managing the pond in the CDF, moving stop logs, and other water management activities.

3.4.2 Water Management in the CDF During Dredging

A pond must be maintained in each disposal cell that covers all dredged material to the extent possible given site conditions. Maintaining a pond over the dredged sediment is intended to reduce both volatile and particulate air emissions. During the first dredging events, sediment slurry placed in the CDF cells will separate into a consolidated sediment layer on the bottom, with a layer of water on top. The sediment layer is expected to densify and form a seal that reduces infiltration of water from the dredge slurry. Once this seal is formed on the bottom of the CDF cells, a pond will accumulate on top of the dredged sediment and should be maintained at an approximate minimum depth of 2 feet to the extent practicable. Once the seal and pond are achieved, CDF pond water should be recycled to slurry the dredged material for hydraulic offloading.

The water surface elevation in a cell must not exceed 603.5 ft (NAVD 88) to avoid overtopping the interior dike. The difference in water level between the two cells must not exceed 7 ft. The water level in each disposal cell must be monitored regularly to ensure these conditions are being met and to assess the need for water treatment or the addition of water from another source including the Lake George Branch. The Contractor may pump water between cells as needed to maintain a pond and also to minimize the water level difference between cells. All water from the disposal cells must be treated before leaving the site, and the Contractor may not pump or discharge untreated water from the CDF.

3.4.3 Stop Logs

Stoplogs are provided on-site at 3500 Indianapolis Boulevard, East Chicago, Indiana. The Contractor must contact the COR to obtain access to the stop logs. Any stop logs not immediately installed in the Decant Structures are to be stored on site at the IHC CDF.

The Contractor is responsible for installing or removing stop logs as needed to manage water levels in the CDF. Stoplogs must be raised prior to each placement event to minimize sediment accumulation in the decant

SECTION 35 20 23.00 03 - Page 13 structures. Under no circumstances will the Contractor fill the decant structures with sediment. Stop logs must also be raised to ensure an adequate pond is maintained in the CDF at all times. The Contractor is responsible for determining the appropriate stop log elevation based on both sediment and water levels.

3.4.4 Sediment Placement in the CDF

Sediment will be placed into either the west cell or the east cell of the CDF, as directed by the COR. TSCA regulated sediment will be placed ONLY in the East Cell. The Contractor must place the dredged sediment in an even layer, with a maximum sediment height difference of 1' across the width of an individual CDF cell, to the extent possible. This requires that the Contractor use multiple sediment discharge points within the CDF.

It has been calculated that a discharge spacing of approximately 600 ft would result in a sediment elevation difference of approximately 1' between discharge spaces, however variations in the sediment may cause differences in the placement behavior of the material; it is the responsibility of the Contractor to propose a placement method that will leave the sediment in an even layer in the CDF. Limited sediment geotechnical data are provided in Table 3, however it should not be assumed that all sediment uniformly matches the properties provided.

For spill prevention, all piping outside of the CDF cells used for pumping/placing sediment must be double walled, including the pipe used for returning decanted water to the slurrying operation. The Contractor must address all spill prevention measures to be taken during sediment placement operations in the Dredging, Transportation and Disposal Plan.

The Contractor must place the sediment discharge point such that the flow of sediment and/or water will not erode the CDF dikes. Any eroded areas of the dikes that are due to the Contractors sediment placement operation must be repaired by the Contractor. The Contractor must inspect the sediment placement operation at least daily to ensure that no erosion is occurring.

The daily inspection must be documented on the Contractor's daily report.

3.4.5 Documentation of Water Management and Sediment Placement

The Contractor must document the sediment placement location within the CDF. Information that must be tracked includes the location of placement within the cell (as measured by the sediment discharge location), the date and time of the sediment placement, the flowrate and percent solids and/or density of the slurry being placed, and the total volume of material dredged and placed per day. A commercially available software package may be used by the Contractor for this purpose. The documentation for sediment placement must be reported electronically in accordance with the data reporting requirements given in Section 27 26 26 DATA COMMUNICATIONS

INTEGRATION REQUIREMENTS.

Check water levels in the disposal cells, daily if either placement or treatment is occurring and weekly if neither activity is occurring. Check the amount of sediment exposed in each cell, daily if either placement or treatment is occurring and weekly if neither activity is occurring. All data must be reported in accordance with the data reporting requirements given in Section 27 26 26 DATA COMMUNICATIONS INTEGRATION REQUIREMENTS.

3.4.6 Notifications

Notify COR when water surface elevation in either cell is 603.5 ft

SECTION 35 20 23.00 03 - Page 14

(depth=15 ft) because this means treatment is needed.

Notify COR when it appears that more than 15% of the sediment in a disposal cell is exposed because this means makeup water is needed to create or maintain pond.

3.5 EMISSIONS CONTROLS

The Contractor must manage air emissions during dredging. Under no circumstances will sediment be broadcast or sprayed into the CDF from the top of the exterior dikes of the CDF. The Contractor must place sediment low in the CDF, as close to the CDF water level as possible, and in a manner that minimizes air emissions.

The Contractor must place sediment in the CDF in a manner that will meet the action levels for real time air monitoring, as described in Section 44 10 00 AIR MONITORING. The Contractor is responsible for taking actions or implementing control methods in the event that the 24-hour action level or 5-day action levels are exceeded. Some control actions may include but are not limited to: adjusting the sediment placement location or rate, re-calibrating air monitors to ensure that readings are accurate, evaluating data to ensure that air sources originate on site, applying odor control foams to all or part of a CDF cell, tarping or otherwise covering all or part of a CDF cell, applying activated carbon to the CDF pond and/or to the discharge line, or other actions proposed by the Contractor.

If the real time air monitoring indicates that the Contractor is exceeding the 1-hour Maximum Action Level, the Contractor will suspend operations at the CDF as directed by the COR. If the source of air pollutants is verified to be originating outside of the CDF site, the Contractor may be compensated for the work stoppage. If the source of the air pollutants is the CDF pond, the Contractor must take immediate action to lower the air emissions rate at the CDF; sediment placement operations must be suspended until air monitoring indicates that the real time air emissions around the site are lower than the 24-hour action level.

3.6 DISPOSAL OF DREDGED DEBRIS

3.6.1 Debris Measurement

The Contractor must weigh all debris prior to disposal in the IHC CDF, for payment purposes. The Contractor must provide and use certified scales for all debris measurement. The Contractor shall document all measurements using bills of lading or similar per load tracking. All measurement documentation shall be submitted with the Daily Report. Debris storage and cleaning may only take place on the crane pad and debris pad. All trucks and equipment used for handling debris must be cleaned prior to leaving the debris handling area, so that sediment is not tracked around the site.

3.6.2 Disposal Location and Limitations

The all dredged debris shall be disposed of in the WEST CELL of the IHC CDF. Debris shall be placed within the footprint of the west cell of the CDF, on the bottom of the cell, in the general area or portion of the cell indicated by the COR. Debris may not be left on the dike slopes (interior or exterior). Debris must be placed in an even layer. Debris may not be stored outside of the CDF, the debris pad, or the crane pad. No piles of debris may be left on site, outside of these staging or disposal areas unless the materials are stored in a sealed container and the COR

SECTION 35 20 23.00 03 - Page 15 specifically approves of the storage.

The maximum size equipment that is allowed on the center dike of the IHC CDF is limited to 500 psf, or roughly a normal sized pick-up truck or small piece of equipment. Cranes or other large equipment are only allowed on the exterior dike of the west cell. The following rules apply to use of the government furnished crane (or other similar equipment) on the exterior dike:

a. The crane shall be centered on the crest of the exterior dike. The crane shall not be allowed near the edge of the crest for embankment stability as well as worker safety.

b. The crane shall be kept on the west cell exterior embankment until such time that it can be confirmed that pore water pressure has dissipated from the newest section of the dike (constructed in 2011 under the Dike 3 contract).

c. The crane shall not be allowed on the interior dike (cross-dike) for any reason. The interior dike is built from clay and debris, the strength of which cannot be confirmed.

d. As the CDF cells are filled with dredged material, it should be confirmed that the sediment is sealing as has been predicted in a number of analyses. If the sediment is not sealing the bottom of the CDF as needed, the crane should be removed from the crest and further analysis performed.

e. Visual observations shall be made any day the crane sits on the embankment. The observer shall look for signs of damage; ruts, soil sloughing, cracks, depressions, slippage, or any other signs of distress. If any signs of distress are observed during the required visual observations, the Contractor shall remove the crane from the dike and immediately notify the Contracting Officer's Representative (COR) and the USACE District Office.

f. If the crane is to remain on the embankment for an extended period of time, a crane mat shall be used to help distribute the weight of the crane.

NO MUNICIPAL WASTE OR CHEMICAL WASTE MAY BE PLACED IN THE CDF AS WASTE.

USED OIL BOOMS OR SORBENT MATERIALS, WASTE FUEL OR OIL, WATER TREATMENT

CHEMICALS OR OTHER LEFTOVER MATERIALS USED BY THE CONTRACTOR AT THE IHC CDF

MUST BE DISPOSED OF OFF-SITE CONSISTENT WITH ALL FEDERAL, STATE, AND LOCAL

WASTE HANDLING REGULATIONS. THE CONTRACTOR MUST PREPARE A SEPARATE WASTE

HANDLING PLAN IN ACCORDANCE WITH SECTION 01 57 20.02 03 ENVIRONMENTAL

PROTECTION.

3.6.3 Government Furnished Crane

A Government furnished crane (Manitowoc M-80W) is available on-site for Contractor's on-site government related work. The Contractor may elect to use this crane for debris disposal operations. If the Contractor chooses to use the crane, the Contractor shall be responsible for operating costs associated with the crane (including but not limited to the cost of providing a qualified, COR approved, operator, performance of routine service/maintenance, lubrication and fuel costs). Routine service/maintenance is to include the performance of all daily and weekly required items (A & B) as shown on the Manitowoc Engineering Company

SECTION 35 20 23.00 03 - Page 16

"Preventive Maintenance Checklist" for an M-80W crane. This Checklist is attached at the end of this specification section. The Government will perform periodic inspections of the crane to verify that the prescribed service/maintenance requirements are being performed. The Government will be responsible for non-routine maintenance of the crane.

The Manitowoc M-80 crane has a 100-ft long boom, is approximately 22 feet in length with a counterweight of 53,300 pounds. It is currently rigged to lift up to 40,000 pounds. If it turns out that more capacity is needed, the Manitowoc M-80 crane can be rigged to lift a maximum of up to 97,000 pounds; the Contractor must request in writing that the crane be rigged for a larger capacity. The Contractor must provide crane usage records on a weekly basis and completed Preventive Maintenance Checklists on a monthly basis to the Government. In addition, the Contractor is responsible for outfitting the cranes with a grapple or other fixture suitable to handle scrap and debris to be encountered during dredging operations.

3.6.4 Salvage

The Contractor may salvage debris at his discretion and expense, subject to the conditions of this paragraph 3.3, unless the salvaged item(s) are of interest to law enforcement officials. No payment will be made for either handling, cleaning or off-site disposal of debris associated with this work. The Contractor is responsible for meeting all waste handling and environmental laws associated with salvaging material from the Indiana Harbor Canal, including the following requirements:

- All salvage materials will be cleaned in accordance with 329 IAC 3.1-6-4(b);

- All cleaning of salvage materials will occur in an area with adequate secondary containment, such as on the debris pad;

- Wastes generated in the cleaning of salvage materials will be disposed of properly, such as in the IHC CDF.

The Contractor must fully document where and how any material going off-site will be salvaged, and must disclose the name and location of all proposed salvage facilities for government approval as described in paragraph 1.6. NO MATERIAL CAN BE SALVAGED IF IT IS EMBEDDED IN THE TSCA

MATERIAL IN THE SPOTS INDICATED ON THE PLANS; ALL MATERIAL FROM THE TSCA

AREAS MUST BE PLACED IN THE IHC CDF FOR DISPOSAL.

3.7 MEASUREMENT

Government will take soundings before and after dredging. Payment will be made as described in Section 01 22 00.00 03 MEASUREMENT AND PAYMENT.

3.7.1 Method of Measurement

The material removed will be measured by cubic yard in place, by means of soundings taken before and after dredging. The drawings represent existing conditions based on current available information, but will be verified and corrected, if necessary, by soundings taken before dredging in each locality. Hydrographic Surveys will be conducted to meet USACE Performance Standards as defined in the Hydrographic Surveying Manual EM 1110-2-1003 dated 1 January 2002. Surveys will be performed by multi-beam sweep type surveys or by single beam sounding equipment. Whenever bottom soundings are obtained utilizing multi-beam technology, the operating frequency will be 455 KHz. The operating frequency of the single beam sounder will be 200-210 KHz. The multi-beam sonar and the single beam sonar will be calibrated

SECTION 35 20 23.00 03 - Page 17 following procedures outlined in the aforementioned EM. The same equipment shall be used for priors and asbuilt surveys, using the same work platform wherever possible. Areas sounded more than 30 days prior to dredging will be re-sounded when requested by the Contractor. The Contractor has the option of being present when such soundings are made.

3.7.2 Government Utilization of Multi-beam and Single Beam Sounders for Quantity and Clearance Surveys

Multi-beam sounding surveys shall be performed in all required work areas wherever practical prior to dredging to identify required work. These multi-beam surveys will provide total bottom coverage of the required work area. Multi-beam surveys shall also be used for after dredge surveys to confirm total clearance of the required work area. Single beam sounding surveys shall be performed in areas where shallow depths or the tight orientation of the project area make multi-beam surveying impractical; or at the discretion of the Government.

3.7.3 Surveys During Progress of Work

Contract depth will be determined by soundings or sweepings taken behind the dredge as work progresses. The Contractor shall take progress soundings or sweepings.

3.7.4 Monthly Estimates

Monthly estimates of work completed will be based on the result of soundings taken during the progress of the work. Deductions will be made for dredging and disposal not in accordance with the specifications.

3.8 FINAL EXAMINATION AND ACCEPTANCE

As soon as practicable after the completion of areas, which in the opinion of the Contracting Officer will not be affected by further dredging operations, each area will be examined by the Government by sounding or sweeping, or both. The Contractor will be notified when soundings or sweepings are to be made and will be permitted to accompany the sounding or sweeping party and to inspect the data and methods used in preparing the final estimate. When areas are found to be in a satisfactory condition, the work therein will be accepted as complete. Final estimates will be subject to deductions or correction of deductions previously made because of excessive overdepth, dredging outside of authorized areas, or disposal of material in an unauthorized manner.

3.9 DEMOBILIZATION

At the completion of all dredging work the contractor shall remove all temporary components, barges, dredge, support equipment, and miscellaneous material from the site.

No equipment, materials, or temporary facilities shall remain on the project site upon completion of demobilization unless approved in writing by the COR. Failure to remove such items will result in the Contracting Officer withholding final contract payment until items are appropriately removed.

The entire site shall be restored to pre-mobilization conditions to the Contracting Officer's satisfaction.

SECTION 35 20 23.00 03 - Page 18

3.10 POSTPLACEMENT SEDIMENT SURVEY

The Contractor will perform soundings or a bathymetric survey of the sediment level in the CDF, to determine the sediment surface profile at the end of the contract. The survey will cover each cell of the CDF completely, from dike to dike in all directions. The Contractor may use single or multi-beam sounders as approved by the COR. The Contractor will submit the CDF post placement sediment survey in the same manner as monthly dredging estimates.

-- End of Section --

SECTION 35 20 23.00 03 - Page 19 naphthalene concentrations continuously and averaging the particulate measurements over user-specified intervals. The monitor(s) shall be equipped with alarms that can be set at user-specified levels and averaging time. The selected monitor(s) shall have detection limits lower than 15 µg/m^3 naphthalene. The selected monitor(s) shall be designed for outdoor use with the ability to operate in the temperature range expected at the site, with sufficient automation and low operator maintenance requirements. The selected monitor(s) shall be capable of providing automated real-time data transmission to a central location and/or internal data logging and automated data recording. The real time naphthalene monitor(s) shall be mobile to potentially be moved in response to seasonal changes in prevailing wind direction.

Some air monitors that fulfill the requirements for real time naphthalene monitoring are: UV Sentry Gas Analyzer supplied by Cerex Monitoring Solutions, LLC., and the UV Sentry Raman Spectroscopy monitor. The monitor selected shall be one of these specified units or equivalent. Selection of one of the listed monitors does not preclude the requirement for the Contractor to ensure that the selected monitor meets the specifications above.

The Contractor is responsible for operating and maintaining air monitoring equipment and all associated appurtenances purchased under this contract until Contract closeout. Air monitoring equipment and all associated appurtenances purchased under this contract shall become the property of the Government.

2.3.3 Air Monitor Location

The goal of the real-time air monitoring is to cover the perimeter of the CDF cells and to monitor the emissions from the CDF cells. The Contractor shall be cognizant that the IHC CDF site is located in a highly industrialized area and is surrounded by various other potential sources of emissions. Eight concrete pads have been constructed on top of the exterior CDF dikes for installation of the air monitors as shown on Drawing Sheet G-04. Sheet G-04 includes an "Air Monitoring Station Location" chart on G-04 that shows the dike station of where all 8 monitor pads are located. The air monitor pads are equipped with 120VAC and 240VAC receptacles for monitoring equipment. The electrical details for the air monitor pads are shown on Drawing Sheets E-01, E-02, and E-03.

Four on-site long-term air monitors shall be installed (by others) on the four pads located at the midpoint of each exterior dike. Point source real-time monitors shall be installed at the mid-point pads adjacent to the long-term monitors. If open-path real-time monitors are selected, and if the Contractor determines that two open-path monitors are sufficient to monitor the emissions around the perimeter of the CDF cells, these monitors shall be located on the northeast and southwest corner pads, as based on past meteorological data, the prevailing wind is from the south-southwest direction at the CDF site. It should be noted that the two open-path monitor configuration is a suggested configuration and is not a requirement. The Contractor can propose alternate configurations for installation of the real-time air monitors, as appropriate, in consultation with USACE. The final installation location is subject to USACE approval.

2.4 DOCK AREA PID AIR MONITORING

The goal of the PID monitoring is to monitor the VOC emissions from the barges with dredged material docked at the IHC site, when barge(s) are idle

SECTION 44 10 00 - Page 7 or during discharge of the dredged material into the CDF. The PID monitoring requirements in this section are distinct from any personal exposure monitoring that may be required by the health and safety specifications in this contract or by the Occupational Safety and Health Administration (OSHA) for the purpose of ensuring site worker health and safety.

2.4.1 Dock Area PID Air Monitors

A photo-ionization detector (PID) shall be used to measure VOCs on the south side of the IHC site at the crane pad adjacent to the dock area. The PID monitor shall be capable of measuring VOC concentrations continuously and averaging the measurements over user-specified intervals. The selected monitor shall be equipped with a 9.8 eV lamp and shall have detection limits of at least 0.1 ppm VOCs or lower. The selected monitor shall be capable of providing automated real-time data transmission to a central location and/or internal data logging and automated data recording. The selected monitor shall be designed for outdoor use with the ability to operate in the temperature and humidity range expected at the site. The PID shall be calibrated using isobutylene, and all PID maintenance and calibration shall be performed in accordance with the product manual and manufacturer's recommendations.

Some PIDs that fulfill the requirements for monitoring VOCs at the dock area are the MiniRAE 3000 and MultiRAE. The monitor selected shall be one of these specified units or equivalent. Selection of one of the listed monitors does not preclude the requirement for the Contractor to ensure that the selected monitor meets the specifications above.

The Contractor is responsible for operating and maintaining air monitoring equipment and all associated appurtenances purchased under this contract until Contract closeout. Air monitoring equipment and all associated appurtenances purchased under this contract shall become the property of the Government.

PART 3 EXECUTION

3.1 INSTALLATION

Work shall be installed as indicated and in accordance with manufacturer's diagrams and written instructions.

3.2 OPERATION AND PERFORMANCE REQUIREMENTS

The real-time particulate and naphthalene air monitor shall be set to operate and record data continuously during dredging and CDF operationthe period specified in this Specification Section. The Contractor shall inform the COR any time any of the real-time air monitors is down for more than 5 consecutive days during the required monitoring period.

3.3 TESTING AND INSPECTIONS

3.3.1 System Performance Test

Upon installation of the real time monitors, the air monitoring equipment shall be tested in accordance with manufacturer's instructions to demonstrate indicated performance. Notify the Contracting Officer 7 days in advance of the test date. The Contractor shall furnish all instruments and personnel required for the tests. Submit the applicable test

SECTION 44 10 00 - Page 8 procedures and sampling locations to the Government for approval.

3.3.2 Retesting

If any deficiencies are revealed during test, such deficiencies shall be corrected and the tests reconducted.

3.4 TRAINING

The Contractor shall conduct training course for operating staff as designated by the Contracting Officer. The training shall take place after the system is functionally completed and when requested by the Contracting Officer. The field instructions shall cover all of the items contained in the operating and maintenance instructions, as well as demonstrations of routine maintenance operations. The Contracting Officer shall be notified at least 14 days prior to date of proposed conduction of training course.

3.5 REAL TIME AIR MONITORING DATA INTERPRETATION

To identify site-generated emissions, wind direction data will be used to determine the appropriate upwind and downwind samplers for comparison. An alternative means to determine if action levels have been exceeded is to take the difference between the lowest and the highest readings at any time. If the difference is greater than the action level, check the wind direction at the existing on-site meteorological station located on the south dike to determine if the higher one is upwind or downwind. Because short-term equipment cannot be easily started and stopped, they will run continuously, while the meteorological wind direction data will indicate which point-source samplers are upwind and downwind at any given time, allowing for the subtraction of upwind concentrations from downwind values. This upwind/downwind designation will only be used qualitatively to determine if an action level is being approached or reached due to site emissions or by off-site sources.

3.6 PRE-DREDGE AND CDF OPERATION REAL TIME BASELINE MONITORING

3.6.1 Baseline Real Time Particulate Matter Monitoring

The real time particulate emission limit in the IDEM Air Registration Permit require property line emissions to be less than 50 µg/m^3 for total particulate matter above background for 60 minutes. To determine background concentration of particulates for the site, prior to the first dredging event, pre-dredging background sampling will occur for 60 days.

For the first year of CDF operation after the first dredging event, real-time sampling will be completed continuously to get monthly background "statistics" for a period of one year. The contractor shall differentiate all data during the first year sampling period as to upwind (background) and downwind so that the background can be separated out and used in the overall one year statistical analysis. In subsequent years, pre-dredging background sampling shall start two weeks prior to dredging start, in order to get equipment up and running and to determine if there are any surprises relative to the historical background sampling. Real-time air monitoring shall continue during the dredging and CDF filling period and for one month after dredging and filling activities have ceased. Any other non-filling related background real-time monitoring shall be conducted at the discretion of the COR.

SECTION 44 10 00 - Page 9

3.6.2 Baseline Real Time Naphthalene Monitoring

To determine background concentration of naphthalene for the site, prior to the first dredging event, pre-dredging background sampling will occur for 60 days. For the first year of CDF operation after the first dredging event, real-time sampling will be completed continuously to get monthly background "statistics" for a period of one year. The contractor shall differentiate all data during the first year sampling period as to upwind (background) and downwind so that the background can be separated out and used in the overall one year statistical analysis. In subsequent years, pre-dredging background sampling shall start two weeks prior to dredging start, in order to get equipment up and running and to determine if there are any surprises relative to the historical background sampling. Real-time air monitoring shall continue during the dredging and CDF filling period and for one month after dredging and filling activities have ceased. Any other non-filling related background real-time monitoring shall be conducted at the discretion of the COR.

3.7 REAL TIME MONITORING ACTION LEVELS

3.7.1 Particulate Matter Real Time Monitoring Action Levels

Real-time air monitoring shall be conducted during the baseline period as described previously in this section, during the dredging and sediment disposal (into the CDF) period, and two weeks after dredging and sediment disposal end. During the dredging and sediment disposal period, the real-time particulate monitor(s) will be set to record 15 minute averages with an alarm at 50 µg/m^3 above background concentration. The Contractor shall perform one of the following actions in response to an alarm at 50 µg/m^3 above background concentration for particulate matter as appropriate.

a. After an initial 15-minute exceedance, the Contractor shall check the monitoring equipment for possible malfunctions, or required recalibration, as appropriate. At the same time, the Contractor shall investigate into the source of the particulate emissions causing the exceedance, as required.

b. After the second consecutive 15-minute exceedance, the Contractor shall activate emissions control measures as described in Section

35 20 23.00 03 MECHANICAL DREDGING, TRANSPORTATION, AND DISPOSAL.

Responding after the second 15-minute exceedance allows the Contractor a period of 30 minutes to deploy the appropriate particulate matter emissions control measure to minimize the chance of the action level being exceeded

3.7.2 Naphthalene Real Time Monitoring Action Levels

Real-time air monitoring shall be conducted during the baseline period as described previously in this section, during the dredging and sediment disposal (into the CDF) period, and two weeks after dredging and sediment disposal end.

There are 3 short-term action levels for naphthalene. During the dredging and sediment disposal period, the real-time naphthalene monitor(s) will be set to record 60 minute averages with an alarm at 24-hour average of 150 µg/m^3 and 300 µg/m^3 above background concentration. A third alarm shall be set at a 60-minute average of 5,000 µg/m^3. The Contractor shall perform one of the following actions in response to the naphthalene real-time monitoring alarms as appropriate.

SECTION 44 10 00 - Page 10

a. 24-hour Action Level = 150 µg/m^3 (24-hour average) - If the naphthalene emissions are less than 150 µg/m^3 above background over a 24-hour period, no action is required. If the emissions are greater than 150 µg/m3 above background, the Contractor shall monitor emissions over the next 5 days to confirm the emissions do not approach or exceed 300 µg/m3 above background.

b. 5-day Action Level = 300 µg/m^3 (24-hour average) - If the naphthalene emissions are 300 µg/m^3 above background for 5 consecutive days, the Contractor shall implement emissions control measures as described in Section 35 20 23.00 03 MECHANICAL DREDGING, TRANSPORTATION, AND DISPOSAL.

c. 1-Hour Maximum Action Level = 5,000 µg/m^3 (1-hour maximum) - if the CDF naphthalene emissions reach 5,000 µg/m^3 above background, the Contractor shall cease CDF disposal activities, provided all other control measures have been implemented.

3.8 AIR MONITORING FIELD OPERATION RECORDS

The Contractor shall maintain the records of all required real-time air monitoring data and support information in accordance with Section 8a and b and Section 4g of the IDEM Air Registration: 089-15320-00471, including, but not limited to:

a) The real-time air monitoring results

b) The date, place, and time of sampling or measurements

c) The field activities in the vicinity of the monitoring, if applicable (e.g., discharge of dredged material into CDF cell)

d) All real-time air monitor calibration and maintenance records

e) Details pertaining to the application of water or chemical solutions and other methods for air emission control, including volumes of water or solution used, method of application, map of location of application

f) A log recording incidents when control measures were not used when a real-time air monitoring action level is exceeded and a statement of explanation for the no action decision

g) All field monitoring forms, survey or notes, and calculations related to real-time air monitoring and air emission control

All real-time air monitoring data and support information shall be kept at the CDF site either in hard copies or electronically. The Contractor shall make these records available for inspection by USACE, IDEM, or other relevant parties when requested. In addition to the Air Monitoring reporting to IDEM, the Contractor shall submit copies of all records required to IDEM or USACE within 20 working days of a written request from IDEM or USACE. Air monitoring field operation records shall be compiled and submitted monthly to USACE during the air monitoring period.

3.9 REAL TIME AIR MONITORING DATA WEBSITE POSTING

The Contractor shall post the real-time naphthalene and particulate air monitoring data to the project website specified in Section 01 31 23

SECTION 44 10 00 - Page 11

PROJECT WEBSITE and in accordance with Section 27 26 26 DATA COMMUNICATIONS INTEGRATION REQUIREMENTS. For naphthalene, the Contractor shall post the real-time 60 minute average concentrations plotted against the three action level concentrations described in paragraph 3.7.2. For particulate matter, the Contractor shall post the real-time 60-minute average concentrations plotted against the particulate matter action level. The real-time data shall be posted as soon as the data is generated.

3.10 AIR MONITORING DATA REPORTING

Air monitoring data reporting are set forth in the IDEM Air Registration 089-15320-00471 Sections 6 - 17. The Contractor shall submit Air Monitoring Reports described below in accordance with the schedule in the Air Registration. All reports shall be submitted to:

Compliance Data Section Office of Air Quality 100 North Senate Avenue P.O. Box 6015 Indianapolis, Indiana 46206-6015

Unless otherwise specified in the IDEM Air Registration 089-15320-00471, any notice, report, or other submission required will be considered timely if the date postmarked on the envelope or certified mail receipt, or affixed by the shipper on the private shipping receipt is on or before the date it is due. If the document is submitted by any other means, it will be considered timely if received by IDEM on or before the date it is due.

Copies of all reports and correspondences shall also be sent to USACE at:

U.S. Army Corps of Engineers Chicago District 111 North Canal, Suite 600 Chicago, Illinois 60606 Attention: Le Thai

The Air Monitoring Reports shall include the following:

a) Any failure to perform monitoring or obtain valid results in accordance with the Air Monitoring Program

b) All instances of real-time air monitoring results demonstrating that the action levels were exceeded for the period of time that called for corrective action

c) Any corrective actions taken in response to the monitoring results reported above

d) When dredging and dredged material placement take place at the CDF site, the actual in-situ dredged volumes of sediments placed in the CDF will be reported in the Air Monitoring Reportin in accordance with the schedule the Air Registration.

3.11 DOCK AREA PID AIR MONITORING AND ACTION LEVELS

Monitoring at a single location in the vicinity of the crane pad adjacent to the dock area using the PID shall be conducted every day for 10 days prior to start of dredging, and every day when at least one barge with dredged material is docked at the site. The PID monitoring shall be conducted over a continuous 30 minute period between 11 a.m. and 1 p.m.

SECTION 44 10 00 - Page 12 during the days specified above. The PID shall be set to record 30 minute averages of VOC readings.

There are 2 action levels for VOCs as detected by the PID. The PID will be set to record 30 minute averages with alarms at 30-minute averages of 10 ppm VOCs and 100 ppm VOCs. The Contractor shall perform one of the following actions or similar type actions in response the PID alarms as appropriate.

a. If the 30 minute average PID reading of VOCs is less than 10 ppm, no action is required. If the reading is greater than 10 ppm, the Contractor shall check the monitoring equipment for possible malfunctions, or required recalibration, as appropriate. Other possible actions include taking another continuous 30-minute measurement at the same location to confirm or discount the initial reading, or taking another continuous 30-minute measurement at a single location away from the dock area and barge to determine whether the barge is the source of VOCs exceedance. The location(s) for the additional measurement(s) need to be recorded. The Contractor shall monitor emissions over the next 5 days to confirm the emissions do not approach or exceed 10 ppm VOCs.