JANUARY 23, 2017 ADDENDUM NO. 2 FOR SERVICING AND SUPPLYING OF ACTIVATED CHARCOAL FILTER CELLS FOR AIR HANDLING UNITS SPECIFICATION NO.

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1 JANUARY 23, 2017 ADDENDUM NO. 2 FOR SERVICING AND SUPPLYING OF ACTIVATED CHARCOAL FILTER CELLS FOR AIR HANDLING UNITS SPECIFICATION NO For which Bids were due in the office of the Chief Procurement Officer, Department of Procurement Services, Bid & Bond Room 103, City Hall, 121 N. LaSalle Street, Chicago, IL at 11:00 a.m., Central Time on January 27, The following additions and revisions are incorporated into the above-referenced Specification (the "Contract Documents") as noted. All other provisions and requirements as originally set forth, except as amended by previous addenda, remain in full force and are binding. Any additional work required by this Addendum shall conform to the applicable provisions of the original Contract Documents. BIDDER MUST ACKNOWLEDGE RECEIPT OF THIS ADDENDUM IN THE SPACE PROVIDED ON THE PROPOSAL EXECUTION PAGE. SECTION 1. NOTICE OF REVISIONS/CHANGES/CLARIFICATIONS BID OPENING HAS BEEN POSTPONED TO FEBRUARY 3, 2017 Change 1: Change 2: The Bid Opening Date has been postponed to February 3, For which Bids are due in the Department of Procurement Services, Bid & Bond Room, Room 103, City Hall, 121 N. LaSalle Street, Chicago, Illinois, 60602, at 11:00 a.m., Central Time. Delete the existing Section 5.14 and replace it in its entirety with the following revised Section 5.14: (subsection a. and b. have been updated) 5.14 Activated Charcoal Filter Cells (Line Items 1 18) For Line Items 1 through 18, pricing should be based on servicing and reactivating the existing charcoal. In the event additional virgin carbon is required to make up charcoal lost during the reactivation process, the Contractor will not be compensated for the lost carbon; however if the City requests replacement of the carbon media or the carbon media cannot be reactivated, only then, will the Contractor be compensated at the Line Item 23 bid price. The use of Line Item 23, purchase of raw (virgin) carbon must be preapproved by the Chicago Department of Aviation. The Contractor is responsible for the following services and must include each of these services in the unit cost for each Line Items 1 through 18: Page 1 of 5

2 a. Pre-and Post-Reactivation Testing Of Charcoal Filter Cells For each group of Air Handling Units (AHU) not to exceed 10 separate AHUs, the Contractor must take an appropriate random sample and perform all necessary tests to determine the presence of pollutants, contaminants and impurities in the charcoal. The Contractor is also responsible for determining if the charcoal is in compliance with the hardness, density, and size characteristics as specified in section Activated Charcoal Characteristics. The testing methods, at a minimum, shall be testing for EPA Toxicity Characteristic Leaching (TCLP) for Volatile Organic Compounds (VOCs), TCLP for Semivolatile Organic Compounds (SVOCs) and contact ph between 2 and 12. The sampling procedure consists of taking a 100 gram sample of the carbon from one Air Handling Unit (AHU) from each group of AHUs before and after reactivation. Each pre and post sample shall be tested for possible contaminants. The pre and post 100 gram sample test results shall be included in a detailed monthly report stating the findings of both tests for review by CDA prior to the installation of the carbon. The report must be submitted to CDA at the end of the month. A report of the testing results must be completed for testing done during the preceding month and must be submitted to CDA no later than three weeks into the following month. The report must contain the following: 1. Name, address, and telephone number of the laboratories (IEPA - Illinois Environmental Protection Agency certified or equivalent) which performed the tests. 2. Identification of pollutants, contaminants, and impurities by weight, volume or percentage, and/or deficiencies pertaining to physical characteristics as described in the Detailed Specification Activated Charcoal Characteristics. 3. Number of tests performed, location/building, Air Handling Unit IDs within the selected test group, and date(s) of the test(s). 4. Copies of laboratory tests results. If the pollutants, contaminants and/or impurities can be removed by the reactivation process, the carbon can then be reactivated. If the pollutants, contaminants, and/or impurities cannot be removed by the reactivation process and/or the charcoal does not meet the physical characteristics, the Contractor must legally dispose of the defective carbon and replace with new carbon. The Contractor must immediately submit a written action plan to the Commissioner to remedy the situation. The Contractor must include in its base bid price the cost of all tests and reports. b. Reactivation of Charcoal Filter Cells The Contractor must reactivate the spent charcoal of all Charcoal Filter Cells which exist at various locations at Chicago O Hare International Airport unless directed by the City to provide new virgin charcoal. The Contractor must reactivate the charcoal filter cells at a facility approved by the Commissioner which may be located anywhere in the Page 2 of 5

3 United States. Removal of spent charcoal from the charcoal filter cells, cleaning, reconditioning, refining and/or repairing the charcoal filter cells as specified must be done at the Contractor s facility. In order to safeguard the coconut shell charcoal being utilized in the Airport s charcoal filter cells against damage, contamination, exchange, loss and/or substitution that may result during packaging, loading, shipments, unloading, reactivation and storage, the Contractor must ensure that : The Airport s charcoal will be carefully segregated at loading and unloading dock for storage and shipments. The Airport s charcoal will be processed separately in order to eliminate any accidental commingling, contamination, exchange, and/or substitution. As the contract requires that the Contractor sample test the carbon from each group of Air Handling Units after the cells have been removed from service before reactivating the charcoal, the Contractor shall take a 100 gram sample for the reactivated carbon to then test the carbon again before refilling the cells with it, the Contractor will need to supply the carbon at the beginning of the contract in order to have enough carbon available to meet the one day turnaround from removal of a cell at the airport to its reinstallation the next business day at the airport. Therefore, at no additional cost to the City, the Contractor must, at the beginning of the contract, provide an adequate amount of virgin carbon to be used during the initial removal and replacement of the activated charcoal filter cells and then continue to utilize the surplus of reactivated charcoal thereafter during the life of the contract. At the conclusion of the contract the Contractor will retain possession of any surplus charcoal. The Contractor s charcoal processing agency must have significant experience in the reactivation of charcoal of the charcoal filter cells similar to those that exist at the Chicago O Hare International Airport. The Contractor s charcoal reprocessing facility must be in compliance with all the applicable Federal, U.S. EPA, OSHA, State and local rules and regulations. The Contractor further agrees and understands that the charcoal reprocessing (reactivation) agency must comply with all current and future Federal, State, OSHA and U.S. EPA rules and regulations and Local applicable laws and regulations. It is up to the Contractor to determine the proper equipment and procedure for reactivation however, it must be acceptable to the City. Activated Charcoal Filter Cells- Reactivation or of Charcoal Filter Cells must be in compliance with Federal, U.S. EPA, OSHA, State and Local applicable laws, rules and regulations. During the life of this Contract, if it is found that the Airport s charcoal has been contaminated, polluted, exchanged, mixed or substituted by the Contractor and/or its charcoal reprocessing agency with other agencies charcoal, the Contractor will be completely responsible for the cost of testing of all the activated charcoal filter cells of the Chicago O Hare International Airport at no cost to the City. Consequently, the Contractor must replace all the contaminated, substituted and/or unacceptable charcoal from the activated charcoal filter cells at no cost to the City. The Contractor must also pay the cost of all damages, losses, disruptions and inconvenience to the public health and safety, public property and the normal conduct of business that may occur at the Airport due to such negligence by the Contractor and/or its charcoal Page 3 of 5

4 reprocessing agency. c. Cleaning Of Cells All cells are to be scraped with a wire brush or similar tool to remove rust and/or scale from exterior surfaces. A high pressure (125 minimum-psig), small nozzle air hose is to be used to remove any contaminated activated charcoal from the internal parts of the cells. d. Painting of Cells All charcoal filter cells are to be repainted with one coat of Hanna XB 290, Benjamin Moore CM20 Rapid Dry Enamel, Sherwin Williams Industrial Enamel B54Z-400 Series, or approved equal, at a ratio of four parts thinner to one part paint. During the process of painting, extreme care must be exercised so that pores of the filters are not choked or clogged which could potentially restrict the flow of air. The cells are to be painted on an as needed basis and /or as directed by the Commissioner; at a minimum, each cell shall painted at least once during the term of the contract unless the given cell has been replaced by a new cell. During the Contract and at the conclusion of the Contract, all cells must be in good repair and the painted surfaces must be free of chips, nicks and rust. e. Refilling of Cells Refilling of cells with activated charcoal is to be arrived at by allowing no void spaces between the top of the charcoal and the end cap of the filter cells. New gaskets are to be used. Cells must be vibrated and void space filled to the top of an end cap before shipment. The Contractor must furnish all necessary labor, material, products, and equipment and disposal services for removing, reconditioning, refilling and replacing the activated charcoal filter cells, to fully conform to the Specifications. The Contractor, upon refurbishing the activated charcoal filter cells as hereinafter specified, must deliver and reinstall the cells at Chicago O Hare International Airport at the locations designated by the Commissioner. f. Activated Charcoal Characteristics The activated charcoal must meet the following characteristics: Carbon Tetrachloride Activity - 60% by weight (minimum); Carbon Tetrachloride Retentivity - 35% by weight (minimum); Hardness (strength) 95 %( minimum); Vibrated Apparent Density 0.50 g/ml (minimum); Kindling Point -340 C (minimum) Grains of irregular configuration Particle Size Distribution (Tyler Screen) - Nominal 4 x 8 Retained on 6 Mesh - 10% Max. Passing 6 retained on 8 Mesh - 40% Min. Passing 8 retained on 10 Mesh - 40% Min. Page 4 of 5

5 SECTION 2. QUESTIONS, RESPONSES AND CHANGES Question 1: Pre reactivation Does the airport want a TCLP test done on a sample per air handler with a separate lab report per air handler? Or do they require a sample from each air handler tested together as a representative sample on a monthly basis meaning would there be one lab report per month for multiple air handlers? Response 1 : Question 2: Response 2 : The TCLP test should be done for a group of Air Handling Units (AHU) not to exceed 10 separate AHUs at a time. The Contractor must take an appropriate random sample and perform all necessary tests to determine the presence of pollutants, contaminants and impurities in the charcoal. The Contractor shall submit a lab report per month for multiple AHUs during the Contract term. Post reactivation What type of test is the airport requiring for post reactivation? Is it a TCLP test or are they looking for a test that certifies the reactivated carbon? Is this per air handler (separate report per ahu) which would be very difficult or since carbon is typically reactivated in large volumes, would this be a representative sample of all the carbon in each batch that is reactivated, meaning one report per volume reactivation? CDA is looking for a test that certifies the reactivated carbon is free of pollutants, contaminants and impurities. The testing methods, at a minimum, shall be testing for EPA Toxicity Characteristic Leaching (TCLP) for Volatile Organic Compounds (VOCs), TCLP for Semivolatile Organic Compounds (SVOCs) and contact ph between 2 and 12. The Contractor shall submit a representative sample of all carbon reactivated in each batch, one report per batch. END OF ADDENDUM NO. 2 CITY OF CHICAGO JAMIE L. RHEE DEPARTMENT OF PROCUREMENT SERVICES CHIEF PROCUREMENT OFFICER Page 5 of 5