250.01 250-1 SECTION 250 ENVIRONMENTAL, HEALTH AND SAFETY MANAGEMENT DESCRIPTION
250.01 This work consists of protection of the environment, persons, and property from
contaminants that may be encountered on the Project. This includes monitoring the work for encounters with contaminants or suspected soil and groundwater contaminants; the management of solid, special, and hazardous waste; and management of visual emissio ns associated with hazardous waste, when encountered on the project.
250.02 The Contractor shall furnish all personnel, materials, equipment, laboratory services,
and traffic control necessary to perform the contamination monitoring, testing, and site remediation when required. Traffic control shall be per the requirements of Section 630. Monitoring equipment used to detect flammable gas, oxygen level, and toxic gas shall be capable of detection to meet the following standards: Table 250 -1 DETECTION STANDARDS FOR MONITORING GASES Instrument Detection Constituent Threshold Limit Increments Flammable Gas 1% LEL 1% Oxygen 19% 0.1% Toxic Gas 1 PPM 1 PPM Table 250 -1 Notes: LEL = lower explosive limit PPM = parts per million CONSTRUCTION REQUIREMENTS
250.03 General. Prospective bidders, including subcontractors, are required to review the
environmental documents available for this project. These documents are listed in subsection 102.05 as revised for this project. This project may be in the vicinity of property associated with petroleum products, heavy metal -based paint, landfill, buried foundations, abandoned utility lines, industrial area or other sites that can yield hazardous substances or produce dangerous gases. These hazardous substances or gases can migrate within or into the construction area and could create hazardous conditions. The Contractor shall use appropriate methods to reduce, and control known landfill, industrial gases, and visible emissions from asbestos encounters and hazardous substances that exist or migrate into the construction area. The Contractor shall follow CDOT’s Regulated Asbestos -Contaminated Soil Management Standard Operating Procedure, dated October 18, 2016, for proper handling of asbestos -contaminated soil, and follow all applicable Solid and Hazardous Waste Regulations for proper handling of soils encountered that contain any other substance mentioned above. 250.03 250-2 Encountering suspected contaminated material, including groundwater, old foundations, building materials, demolition debris, or utility lines that may contain asbestos or be contaminated by asbestos, is possible at some point during the construction of thi s project. When suspected contaminated material, including groundwater, is encountered, or brought to the surface, the procedures under subsection 250.03(d) and 250.05 shall be followed. Transportation of waste materials on public highways, streets and roadways shall be done per Title 49, Code of Federal Regulations (CFR). All labeling, manifesting, transportation, etc., of waste materials generated on this project shall be coordinated with the Engineer. All hazardous waste manifests for waste materials generated on this project shall list the Colorado Department of Transportation as the generator of the waste materials except as otherwise noted. If the Contractor contaminates the site, the Contractor shall be listed as the generator on the hazardous waste manifests, permits, and other documents for such material. If the project is not on a State Highway or frontage road, then the appropriate local governmental entity having jurisdiction over the transportation system facility shall be listed as the hazardous waste generator. If waste materials must be handled in a permitted treatment, storage and disposal (TSD) facility, the facility shall be designated in writing by the Engineer. If the waste materials are the result of the Contractor’s actions, the Contractor shall designate the facility. The hazardous waste transportation phase of the work involves insurance required by law and regulations. If the waste materials are determined to be hazardous, the Contractor must submit proof that the transportation company is covered by the appropriate type and amount of insurance required by laws and regulations governing the transportation of hazardous waste. The Contractor alone bears the responsibility for determining that the work is accomplished in strict accordance with all applicable federal, state, and local laws, regulations, standards, and codes governing special waste, petroleum, and hazardous substan ce encounters and releases. The Contract will list known or suspected areas of contamination. Health and Safety Officer, Monitoring Technician, and Health and Safety Plan shall be required when so stated in the Contract. (a) Health and Safety Officer (HSO) . The Contractor shall designate an HSO, not the Project Superintendent, who shall have at least two years of field experience in chemical related health and safety. The HSO shall be either a certified industrial hygienist (CIH), certified hazardous materials manager (CHMM), professional engineer (PE) licensed in the State of Colorado, certified safety professional (CSP), or registered environmental manager (REM) meeting the criteria set forth in 29 CFR 1926. When asbestos is present or is suspected to be present, the HSO shall have additio nal training and certification per the Air Quality Control Commission Regulation N o. 8 Part B. The HSO shall meet the minimum training and medical surveillance requirements established by the Occupational Safety and Health Association. When regulated asbestos contaminated soil (RACS) is present or is suspected to be present on or near a project, the HSO shall have knowledge of RACS regulations. The HSO shall meet the minimum training and medical surveillance requirements established by the Occupational Saf ety and Health Administration (OSHA) and the Environmental Protection Agency (EPA) for a supervisory Site Safety Official per 29 CFR 1962.65. The Contractor shall furnish documentation to the Engineer, at the Pre - construction Conference, that the above requirements have been met. Certification as an Asbestos Building Inspector per subsection 250.03(b) is recommended. 250.03 250-3 The HSO shall be equipped with the following:
1.Communication equipment as required in subsection 250.03(d)2A and a vehicle.
2.Monitoring and detection equipment for flammable gas, oxygen sufficiency, toxic gas, radiological screening, and other hazards. This includes, as required, a combustible gas indicator, flame ionization or photo ionization detector , oxygen meter, radiation monitor with Geiger Mueller detector, and other foreseeable equipment.
3.Depth gauging equipment, sampling equipment, and sampling containers.
4.Personal protective equipment (levels C and D) when required. The HSO shall recommend and supervise those actions that will minimize the risk of hazardous substance related injury to the workers, Department personnel, the general public, property, and the environment. Hazardous substance is defined in 29 CFR 1926.32. The HSO shall prepare written procedures for the monitoring of confined space entry and working in or near excavations, including but not limited to trenches and drill holes associated with this project. The HSO shall conduct or supervise all hazardous substance and solid waste related testing, sampling, monitoring, and handling for this project to ensure compliance with applicable statutes and regulations, and other applicable environmental requirements under subsections 107.01 and 107.02. The HSO shall be available for consultation and assistance with contaminated materials related testing, sampling, and field monitoring as required by the Engineer. The HSO shall prepare and submit a bound and indexed final site report to the Engineer at the end of the project. This site report shall include a detailed summary of all contaminated materials and contaminated water that were encountered and their final disposition. During each week the HSO is utilized, the HSO shall prepare a daily diary that shall be submitted to the Contractor and the Engineer. This diary shall be submitted at the end of the week and shall become a part of the Department’s records. The diary shall contain a chronological log of activities on the project including dates and times on site, equipment used and calibrations, field monitoring results, visual observations, conversations, directives both given and received, and disposition of suspected ha zardous substances. The Engineer will review this submittal and approve the actual number of hours to be paid. (b) Monitoring Technician (MT). The Contractor shall designate a monitoring technician to be responsible for monitoring of hazardous substances during work on the project. The MT shall have a minimum of two years of actual field experience in assessment and remediation of hazardous su bstances that may be encountered during highway construction projects. When asbestos is present or is suspected to be present on or near a project, the MT shall have additional 40 hours’ experience in RACS project management and certification as an Asbest os Building Inspector per the Colorado Air Quality Control Commission Regulation N o. 8 Part B. The MT shall be experienced in the operation of monitoring devices, identifying substances based upon experience and observation, and field sampling (for testing) of all media that may be found on the site. Completion of the 40 -hour hazardous waste and 8 - hour supervisory training required by OSHA and U.S. EPA rules and regulations that complies with the accreditation criteria under the provisions of the proposed 29 CFR 1910.121 is required before beginning work. The Contractor shall furnish documentation at the Pre - construction Conference that demonstrates these requirements have been met. 250.03 250-4 The MT shall be equipped with the following: (1) Communication equipment as required in subsection 250.03(d)2A and a vehicle. (2) Monitoring and detection equipment for flammable gas, oxygen sufficiency, toxic gas, radiological screening, and other hazards. This includes, as required, a combustible gas indicator , flame ionization or photo ionization detector, oxygen meter, radia tion monitor with Geiger Mueller detector , and other foreseeable equipment. (3) Depth gauging equipment, sampling equipment, and sampling containers. (4) Personal protective equipment (levels C and D) when required. The MT shall be present on site and perform monitoring as required by 250.03(d) when work is being performed in areas of suspected contamination and on a predetermined basis throughout other work on the project. The MT shall monitor for compliance with regulations, the project Health and Safety Plan and the Materials Management Plan (if they exist for the project), the Contract, and the environmental documents for the project. The MT shall immediately notify the Contractor , the Engineer, and the HSO of any hazardous condition. During each week the MT is utilized, the MT shall prepare a daily monitoring diary , which shall be submitted to the Contractor, HSO and the Engineer. This diary shall be submitted at the end of the week and shall become a part of the Department’s records. The diary shall contain a chronological log of activities on the project including dates and times on site, equipment used and calibrations, field monitoring results, visual observations, conversations, directives both given and received, and disposition of suspected hazardous substances. The Engineer will review this submittal and approve the actual number of hours to be paid. (c) Health and Safety Plan (HASP ). The HSO shall prepare a written HASP for the project, formatted as shown in Appendix B, Occupational Safety and Health Guidance Manual for Hazardous Waste Site Activities, DHHS (NIOSH) Publication No. 85-115, available from the Superintendent of Documents, U.S. Government Printing Office. The Contractor and the HSO shall review the environmental documents listed before preparation of the HASP . The Con tractor shall submit a signed (or electronically sealed when HSO is a Professional Engineer) electronic HASP to the Engineer for acceptance. The Engineer shall have seven calendar days to review and accept or reject the proposed HASP . Within five calendar days after acceptance, the HSO shall distribute the accepted HASP to each emergency response agency s ervicing the project area, the HASP designated emergency hospital, and the Engineer. Earth or demolition work shall not occur until after the HASP is accepted distributed. The HASP shall also be available to the Contractor’s employees, their representatives, and officials of OSHA, EPA, Colorado Department of Public Health and Environment (CDPHE), local government health department, Federal Highway Admini stration (FHWA) , and as determined by the Engineer. The Engineer will distribute the accepted HASP to appropriate Department personnel. The HSO shall revise and update the HASP as warranted by changes in the field conditions. All on -site workers (Contractor’s, Department’s, Utilities’, and others) shall be briefed by the HSO on the contents of the HASP and any revisions thereof. The HSO shall conduct briefings (group or individual) to inform new employees, subcontractors, utili ty 250.03 250-5 companies, and other on -site workers of the HASP contents before their entry on site. All personnel involved in excavation or other soil disturbing activities shall receive the required two-hour Asbestos Awareness training by a Certified Asbestos Inspector, when asbestos discoveries are anticipated, or discoveries are made. A signature log of all briefing attendees shall be kept and furnished to the Engineer. The . Contractor shall provide, as required, eyewash equipment and stations, emergency showers, hand and face washing facilities, and first aid equipment. The Contractor shall provide, as required, decontamination facilities for personnel and equipment employed in the work. The exact procedure for decontamination and frequency shall be included in the accepted HASP . Decontamination facilities shall meet th e criteria set forth in the Code of Federal Regulations (29 CFR and 40 CFR). (d) Precautions and Procedures . The following minimum precautions and procedures shall be followed during the construction of the project:
1.General construction precautions:
A.All monitoring and piezometer wells and test borings shall be established or abandoned by the Contractor as regulated by the State Engineer’s Office. Copies of all required permits, notification, and abandonment documents shall be submitted to the Engi neer before payment approval.
B.Hazardous substance related activities shall have a work plan for each work phase, which shall be coordinated with the Engineer at least three workdays before commencement of each phase of the work.
C.The Contractor shall properly handle all investigation -derived waste generated by this project. Documentation shall be submitted to the Engineer of all tests performed for Treatment, Storage, and Disposal (TSD) determination; classification of waste; hauling records; TSD acceptance; manifest (if required); per applicable laws and regulations.
D.When the work may involve air emissions, the Contractor shall contact the Colorado Department of Public Health and Environment (CDPHE), Air Pollution Control Division to ascertain if an air pollution emission notice (APEN ) or permit is required for this operation. The Contractor shall be responsible for filing the APEN and obtaining said permit, if required. The processing of air pollution permits, if required, in non - attainment areas or where public hearings are required, likely will take more than 90 days.
2.For construction on a known or potentially contaminated site, the following conditions shall apply, in addition to those listed in subsection 250.03(d)1:
A.The HSO shall be on site or readily available by radio, telephone or pager at all times during the work. When on site, the HSO shall have an operational portable or mobile cellular telephone available for immediate use in areas where such service is available. When on site in cellular telephone non -service areas, the HSO shall have available, for immediate use, radio access to a site with telephone service. The HSO shall be notified at least 24 hours before the start of confined space entry, storage tank removal, drilling, excavation, trenching, or dewatering operations. 250.03 250-6 B. The HSO shall designate the onsite monitoring equipment for flammable gases, oxygen deficient or enriched atmosphere, and toxic gases, such as but not limited to, a flame ionization detector, photoionization detector, combustible gas indicator, and oxyg en meter. This designated equipment shall be on site during all construction operations and be utilized during trenching, drilling, excavating, confined space entry, underground storage tank removal, and other appropriate construction operations. The exac t equipment to fulfill this requirement shall be specified in the accepted HASP . The HSO shall conduct or supervise the monitoring. The monitoring equipment shall be calibrated as recommended by the manufacturer.
C.When drilling, trenching, or excavating in the presence of detectable concentrations of explosive gases, the soil shall be wetted, and the operating equipment shall be provided with spark proof exhausts.
D.The Contractor, through the HSO, is responsible for ensuring that 29 CFR 1926 is fully complied with during the construction of the project.
E.Affected excavation operations shall be discontinued and personnel shall be removed from the affected excavation sites where any of the following levels are detected: (1) 20.0 percent or more LEL flammable gas, or 10.0 percent in an underground or confined space, (2) Permissible Exposure Limit (PEL) of any toxic gas, (3) 19.5 percent or less oxygen, (4) 25.0 percent or more oxygen, (5) Greater than 2 mrem/hr. (Beta particle and photon radioactivity), (6) Greater than 15 pCi/L (Gross alpha particle activity), or (7) Other action levels as determined by the HSO. (8) Uncovering of suspect Asbestos Containing Material (ACM ), including but not limited to, buried facility components, active or abandoned utility lines, buried foundations and demolition debris, or miscellaneous ACM dispersed in the soil. The Contractor shall follow the procedures outlined in the HASP and 29 CFR 1926 to address these conditions. Work shall resume in these areas when approved by the Engineer.
F.Personnel shall be issued and utilize appropriate health and safety equipment as determined by the HSO, who shall provide the Engineer with a written explanation of what personal protective equipment (PPE) shall be worn, when, and by which personnel. Except in emergency cases, the Engineer shall be advised by the HSO of changes in the degree of PPE before implementation.
G.Personnel shall avoid the area immediately downwind of any excavation unless the excavation is monitored and declared safe.
H.The operators of excavating, trenching, or drilling equipment shall wear appropriate PPE as required in the HASP . 250.03 250-7 I. Exhaust blowers shall be present at the location where required in the accepted HASP .
J.The Contractor shall accomplish the work with employees who have been trained and equipped as required by the HASP and applicable provisions of 29 CFR 1910 and 29 CFR 1926.
K.Fire extinguishers, electrical equipment and wiring shall conform to the applicable requirements of 29 CFR 1926 and 49 CFR.
L.Smoking shall not be permitted within 50 feet of any excavation.
3.For construction within 1 ,000 feet of a known or potentially contaminated site, the following conditions, in addition to those l isted in subsection 250.03(d)1. shall apply:
A.The areas under construction shall be checked with a combustible gas indicator before excavation begins to determine if flammable or combustible gas is in the area.
B.Excavations, trenches, and drill holes shall be monitored by the HSO for flammable gas, toxic gas and oxygen deficiency or enrichment. This shall be carried out continuously unless the presence of flammable, combustible, or toxic gas or oxygen deficiency or enrichment in the area can be ruled out by the HSO. The recommendation to discontinue monitoring must be agreed to by the Engineer and the Contractor. Before implementation, this agreement shall be written, and shall contain specific conditions that will require re- evaluation of the area.
C.When flammable or toxic gas is found in the area, those precautions and procedures in subsection 250.03(d)2 shall apply.
4.The following procedures shall be followed if the level of contamination as documented in the environmental documents referenced in subsection 102.05 as revised for this project is exceeded, or if previously unidentified contaminated air , soil, or water , is encountered during the construction of the project:
A.Work in the immediate area of the release or discovery of contamination shall cease. The Engineer shall be immediately notified.
B.If no HSO is required by the Contract, the Contractor shall designate an HSO as directed, per subsection 250.03(a).
C.The Engineer may direct the HSO to evaluate the material for potential hazardous substance or other contamination or unsafe conditions. This evaluation may include, but is no t limited to, on -site field monitoring, on -site testing, and on or off-site laboratory analysis. Removal of storage tanks and surrounding contaminated soils shall be per applicable laws, regulations and established procedures. If the contaminated material cannot be placed in the embankment or remediated on site, it must be removed to an appropriate TSD facility, as designated in writing by the Engineer. The HSO shall supervise the necessary testing required to make appropriate TSD determinations. Disposal of the unsuitable material shall be considered as remediation work as described in subsection 250.03(d) 4. D and 250.03(d)4. E. 250.04 250-8 D. If this site is determined to be contaminated with petroleum products, hazardous substances, or other solid waste in excess of that indicated in the above listed site investigation documents, a thorough Site Investigation and Waste Management Plan shall be accomplished under the supervision of the HSO. The Site Investigation and Waste Management Plan shall be submitted to the Engineer for approval and shall determine the extent of contamination and propose at least three types of remedial action for the contaminated area as required by applicable statutes and regulations. The HSO shall be available to assist the Engineer in explaining this study to the regulatory agencies. When requested by the Engineer, the Contractor shall prepare a Remediation Plan b ased on the selected remedial method and shall submit this to the Engineer for approval. The time required for the Engineer’s review of the Remediation Plan, including all necessary drawings, calculations, specifications, and other documentation will not exceed four weeks after a complete submittal is received. This work shall not be done unless authorized in writing by the Engineer.
E.If the site is determined to be contaminated with petroleum products; hazardous chemicals, materials, or wastes; or other solid wastes, and is required to be remediated, the HSO or other qualified individuals will supervise the Remediation Plan implementat ion as concurred to by the regulatory agencies, as directed. Hazardous Waste generated by remedial activities shall list the Colorado Department of Transportation as the hazardous waste generator on the required paperwork for projects on State Highways an d their associated frontage roads. If this project is not on a State Highway or frontage road, then the appropriate local governmental entity having jurisdiction over the transportation system facility shall be listed as the hazardous waste generator. If the waste disturbed or produced was caused by Contractor negligence, the Contractor shall be listed as the hazardous waste generator. Remediation work shall be done only when authorized by the Engineer in writing.
250.04 Heavy Metal Based Paint Management . When the work includes the removal of
paint or items covered with paint that may contain lead, chromium, or other heavy metals , the requirements of this subsection shall apply in addition to the requirements of subsection 250.03. The requirements of the HASP shall be per OSHA Publication No. 3142, Working with Lead in the Construction Industry. Paint Removal and Waste Disposal work shall be performed per 29 CFR 1926.62, State and local air quality regulations, the Steel Structures Painting Council (SSPC) Guide for Containing Debris Generated During Paint Removal Operations, the Industrial Lead Paint Removal Handbook (SSPC 91 -18), and the references contai ned. The following minimum precautions and procedures shall be followed unless modified in the approved HASP or its updates: (a) The Contractor shall contact the CDPHE, Air Pollution Control Division to ascertain if an air pollution permit is required for the cleaning or demolition work. If an air pollution permit is required, the Contractor shall obtain the permit. The Contractor shall furnish the Engineer with a copy of the permit application and the permit issued before starting cleaning or demolition activities. A copy of the Air Pollution Emission Notice [APEN] shall be provided to the Engineer, if such notice is required und er the Colorado Air Quality Control Commission’s regulations. The processing of air pollution permits in non - attainment areas, or where public hearings are required, likely will take more than 90 days. 250.04 250-9 (b) The Contractor shall contain paint chips, corrosion residues, and spent abrasives, referred to as waste materials, resulting from the cleaning or demolition operations. The Contractor shall not deposit or release waste material into the water, air or onto the ground below or adjacent to the structure. The Contractor shall conduct cleaning operations to minimize the waste materials produced. Before beginning the work, the Contractor shall submit to the Engineer for acceptance, a detailed methods statement for capturing, testing, and disposing of the removed materials. The Engineer will have seven calendar days to review and accept or reject this methods statement. (c) Abrasives utilized for blast cleaning shall be low -dusting and low waste. Unless approved otherwise, vacuum blasting or wheel blasting shall be used. (d) The HSO shall sample and test the waste material for lead, chromium, and other paint associated heavy metals using the Toxicity Characteristic Leaching Procedure (TCLP) Test, Method 1311 of the EPA publication, Test Methods for Evaluating Solid Waste 846. Sample collection methodology and frequency shall be recommended by the HSO and accepted by the Engineer wi th an adequate number of samples taken to be representative of all waste material collected. If the waste material does not pass the TCLP test, it shall be disposed of in a permitted TSD facility as designated in writing by the Engineer. The waste materials handling decision shall be documented by a report (five copies) submitted to the Engineer. This documentation shall include a description of sample collection methodology, testing performed, test results, and comparison of test results with hazardous waste requirements. The waste material shall not be held at an unpermitted TSD facility site in excess of Resource Conservation and Recovery Act (RCRA) temporary storage time limits. (e) When an item coated with paint is removed, all loose paint shall be removed and collected from the item within 24 hours of the time it is removed or placed onto the ground. All loose paint shall be removed and collected from a painted item before it is removed from the site. The Contractor shall contain loose paint until it is removed and collected. Loose paint is defined as that which can be removed by manual scraping methods. Over waterways, the Contractor shall capture all paint debris by the method specified in the methods statement. The paint debris shall be collected on a daily basis and shall be stored in a properly labeled, tightly sealed container, and placed in a secured location at the end of each working day. (f) All painted steel components that are not designated to be salvaged shall be recycled. Contractor possession of the steel for future use shall be considered a form of recycling. Before transport of the components off -site, the Contractor shall obtain a letter from the recipients of the painted steel components stating that they have been fully informed of the contents of the paint and are capable of handling the paint. If the Contracto r is to maintain future possession of the steel, the Contractor shall supply this letter. If there will be more than one recipient of the painted material, one letter shall be obtained from each recipient. The Contractor shall provide a copy of each letter to the Engineer. If the painted steel components will be recycled by melting, the letter from the recipient is not required. The Contractor shall submit a letter stating the destination of the painted steel components and that they will be melted. (g) When the work consists of the removal of a bridge or components of a bridge coated with paint that has been assumed to contain lead, chromium, other heavy metals, or a combination thereof, the Contractor shall capture paint debris that is dislodged during removal operations. The Contractor may choose any method for dismantling the bridge, subject to the following required construction sequence limitations: 250.05 250-10 1. The concrete deck shall be removed before removal of the steel superstructure.
2.If the methods statement indicates that girders will be dropped to the ground during dismantling, all debris from the concrete deck removal operation shall be removed from the area below the bridge before any girders are dropped into this area.
3.Girders may be cut and dropped only if the span is located entirely over land.
250.05 Material Handling . This work consists of the additional handling of groundwater
and soils to be excavated for construction of the project that are suspected or known to be contaminated. This work also includes stockpiling or containerization, analytical sampling and testing, and final disposition of contaminated groundwater and soils requiring special handling. The Contractor shall maintain vertical trench walls for the work in the specified areas of known or potential contamination, as shown on the plans. Shoring may be necessary to meet this requirement. The Contractor shall confine the removal of contaminate d groundwater and soils encountered as a result of the excavation activities in the specified areas to the vertical and horizontal limits of structure excavation specified in the Contract. The Contractor shall be responsible for any contaminated materials generated beyond the limits of excavation. This shall include any sampling, analysis, and disposal required, and the costs thereof. The Contractor shall be listed as the generator of any such material. The limits of excavation shall be determined as 18 inches outside of structures, including sewers, water lines, inlets, manholes, and other underground structures to be constructed, or as directed. Specific areas of known or potential contamination have been identified in the project plans. There is the potential of encountering contaminated groundwater and soil, which has not been summarized in the plans or specifications, at unknown locations on t he site. Suspected contaminated soil and groundwater shall be handled by one of three methods as follows: (a) Materials Handling (Stockpile and Containerization) . When recommended by the HSO and authorized by the Engineer, material shall be stockpiled or containerized for analysis and characterization for proper handling and, disposal, or both. Sampling and testing of materials shall be as described in the Contra ct. If analysis indicates that soil samples are designated as uncontaminated, as determined by the criteria shown in the Contract or as determined by the CDPHE, the associated soils will not require any special handling and will become the property of the Contractor and may be used on site, subject to other requirements of the Contract. Health and safety monitoring and strict fugitive dust control shall be conducted during the placement of these soils. If analysis indicates that groundwater samples are designated as uncontaminated, as determined by the criteria shown in the Contract or as determined by the CDPHE, the groundwater shall be handled per subsection 107.2 5. Stockpiled and containerized materials shall be secured in compliance with the following provisions until they are determined to be uncontaminated:
1.The Contractor shall not store the material for more than 90 days.
2.The Contractor shall prevent any runoff from infiltrating the ground or running out of the containment area.
3.Soils and groundwater containing different contaminants shall be placed in separate containers or stockpiles. 250.05 250-11 4. The Contractor shall prevent the dispersion of materials or the dilution or mixing of containers and stockpiles.
5.The ground surface that the contaminated soils will be placed shall be covered with plastic sheeting , which will withstand the placement and removal of stockpiled materials without breaching.
6.The ground surface shall be graded to drain toward the edge of the soil piles and the berm or trench around them shall be covered by plastic sheeting.
7.Proper security shall be provided per 40 CFR. (b) Solid Waste Disposal . Soils determined to be contaminated, but not hazardous, as established by criteria in the Contract or as determined by CDPHE or other regulatory agencies having jurisdiction, shall be handled and disposed of as recommended by the HSO and approved by the E ngineer. The Contractor shall haul this material to a solid waste disposal facility. (c) Contaminated Groundwater Disposal . Groundwater determined to be contaminated, but not hazardous, as established by criteria in the Contract or as determined by CDPHE or other regulatory agencies having jurisdiction, shall be handled and disposed of as recommended by the HSO and approved by the Engineer. The Contractor shall prepare a dewatering plan proposing at least three types of treatment and disposal options of contaminated groundwater as required by applicable statutes and regulations. One of the treatment options shall include per mitting and onsite treatment before discharge or disposal. The dewatering plan shall be submitted to the Engineer for approval four weeks before dewatering activities begin. (d) Hazardous Waste Disposal . Soils and groundwater that are designated or suspected to be hazardous shall be containerized immediately upon excavation or upon discovery. Hazardous material shall be labeled and transported to a permitted treatment, storage and disposal (TSD) facili ty or to a hazardous waste disposal facility approved by the Engineer. (e) Additional Requirements. Stockpiled or containerized material characterized as uncontaminated, contaminated, or hazardous shall be stored and disposed of in a manner consistent with current established federal, state, and local regulations for waste materials. Materials with contaminants not specifically regulated shall be disposed of by the Contractor as directed, in consultation with CDPHE. All areas where wastes are generated shall be reviewed by the HSO to identify potential contaminant sources that may res ult in a contaminated waste stream. Contaminated groundwater and soils, which have been identified as solid waste or hazardous waste, requiring disposal according to federal, state, and local regulations, shall be transported per 49 CFR by the Contractor to an appropriately permitted treatment facility, landfill, incinerator, or asphalt plant or other facility approved to accept the waste. CDPHE and the landfill or other treatment or disposal facility shall be notified by the HSO of the material to be disposed of and the corresponding analyti cal test results before shipment. Potentially contaminated water collected from the lined trench of a stockpile shall be treated as required by Colorado Wastewater Discharge Permit System (CDPS) permits, 29 CFR and 40 CFR and reimbursed separately per Contract requirements. 250.06 250-12 250.06 Sample delivery. This work consists of the collection, containerization, and delivery of material samples for analysis to the testing facility designated in the Contract. Environmental Protection Agency (EPA) protocol and standards shall be followed in the collection, containerization, and transport of samples to be analyzed, including the documentation of the proper chain of custody of all samples. The Contractor shall collect sufficient sample material to perform the required analysis and is responsible for ensuring that appropriate climate control has been provided for sample transport. Sample delivery shall be made within the maximum allowable holding time for each sample type, not to exceed 24 hours, ex cluding weekends. The time period required for sample collection and delivery to the testing facility will not be considered an excusable delay. The analysis to be completed and turnaround time shall be approved by the Engineer. The Contractor shall provide the Engineer with a copy of documentation indicating that proper chain of custody requirements have been followed for all samples. Quality control samples shall be provided by the Contractor per the quality control requirements of the testing facility designated in the Contract (quality control requirements are available from the Engineer). The Contractor shall prepare, label, and transport these samples to the testing facility in conjunction with the delivery of other samples authorized for analysis by the Engineer, at no additional cost. The Engineer may request splits of samples, in advance of collection, which shall be provided at no additional cost by the Contractor.
250.07 Regulated Asbestos Contaminated Soils (RACS ) Management . Environmental
documents or plans listed in the special provisions shall include known or suspected locations that could involve encounters with RACS during excavation and other soil disturbing construction activities. Unexpected discoveries of RACS may occur during excavation and soil disturbing construction activities. RACS shall be properly managed or remediated, per subsection 250.07(a). All asbestos related activities shall be performed by CDPHE certified asbestos professionals, contractors, or consultants. Certifications are issued by the CDPHE, Indoor Air Quality Unit. A Colorado Certified Asbestos Building Inspector shall manage the assessment and disposal of RACS and other ACM. The Indoor Air Quality Unit within CDPHE is the only unit that certifies such professionals. The Contactor shall furnish a copy of the certification to the Engin eer. (a) Regulatory Compliance. RACS management is governed by 6 CCR 1007 -2, Section 5.5, which includes and references regulatory compliance with Colorado Air Quality Control Commission Regulation No. 8 Part B -Asbestos. Colorado Regulation N o. 8 governs all asbestos activities, demolition, permitting, and certification of Certified Asbestos Professionals in the State of Colorado. The Contractor shall conform to all current regulations, policy directives, or both, issued by the CDPHE, and the Department. (b) Asbestos Management and Visual Inspections . Asbestos management shall be performed by a CDPHE certified Asbestos Building Inspector. All inspections of the area of asbestos contaminated soil removal shall be performed by a CDPHE certified Asbestos Building Inspector to determine what, if any, co ntrols must be instituted to allow future activity in the excavation area. 250.07 250-13 (c) Permitting and Notification . The CDPHE requires notification of any soil disturbing activity where asbestos is known, suspected, or discovered. A 24 -hour notification to CDPHE is required before any soil disturbing activity of an unplanned asbestos discovery. A 10- workday notification to CDPHE is required before any soil disturbing activity in an area with known or potential RACS. Removal of asbestos -containing material on a facility component, that is located on or in soil that will be disturbed, wi th asbestos quantities above the following trigger levels shall be permitted and abated per the requirements of Colorado Air Quality Control Commission Regulation N o. 8 (5 CCR 1001- 10, Part B):
1.260 linear feet on pipes,
2.160 square feet on other surfaces, or
3.The volume of a 55 -gallon drum. All permit applications shall be submitted to the CDPHE a minimum of 10 days before start of work for approval. The permit application and notification shall be submitted simultaneously. A CDPHE certified General Abatement Contractor shall obtain all required State and local permits and shall be responsible for all associated fees. Permit application, notification, and waiver request forms shall be submitted to: Colorado Department of Public Health and Environment Permit Coordinator/APCD - SS - B1 4300 Cherry Creek Drive South Denver , CO 80246 -1530 Phone: (303) 692- 3100 Fax: (303) 782-0278 Application and waiver forms are available on the CDPHE website . (d) CDOT’s Regulated Asbestos -Contaminated Soil Management Standard Operating Procedure, dated October 18, 2016 . Asbestos contaminated soil shall be managed per 6 CCR 1007- 2,
Part 1 — , Section 5.5, Management of RACS. Regulations apply only upon unexpected discovery
of asbestos materials during excavation and soil disturbing activities on construction projects, or when asbestos encounters are expected during construction. The Contractor shall comply with procedures detailed in the CDPHE’s Management of Regulated Asbestos Contaminated Soil Regulation and CDOT’s CDPHE approved Regulated Asbestos - Contaminated Soil Management Standard Operating Procedure, dated October 18, 2016, including the following minimum requirements:
1.Immediate actions and implementation of interim controls to prevent visible emissions, exposure, and asbestos contamination in surrounding areas.
2.Soil Characterization.
3.Training required for all personnel involved in excavation and other soil disturbing activities, once asbestos is encountered during construction or on projects where asbestos encounters are expected. Asbestos Awareness Training shall be given by a qualif ied and certified Asbestos Building Inspector with a minimum of six months’ experience inspecting asbestos contaminated soil.
4.Assessment for the presence and extent, within the proposed area of disturbance, of asbestos discoveries, whether expected or unexpected, by a CDPHE Certified Asbestos Building Inspector.
5.Investigation and sampling required for risk assessment and management. Investigation, if required, shall be conducted by a CDPHE Certified Asbestos Building Inspector. 250.08 250-14 6. Risk assessment and determinations for further management or abatement.
A.Risk assessment and determinations shall be made by a CDPHE Certified Asbestos Building Inspector and coordinated with the Engineer.
B.Soil remediation is not necessarily required, depending on the circumstances.
7.Submit CDPHE 24-hour Notification F orm for unexpected RACS discovery included in Attachment 1 of the CDOT Regulated Asbestos -Contaminated Soil Management Standard Operating Procedure.
8.Submit CDPHE 10- day Notification F orm for planned RACS management included in Attachment 1 of the CDOT Regulated Asbestos -Contaminated Soil Management Standard Operating Procedure. (e) Risk Assessment and Determinations for Further Management or Remediation . Risk assessment and determinations for further management or remediation shall be closely coordinated with the Project Engineer and Project Manager of the Statewide Management Plan.
250.08 Methamphetamine Lab Sites . Demolition of former Methamphetamine (meth) labs
is enforced by the Governing Authority, which varies from county to county. The Contractor shall demolish all buildings that are identified as former meth labs, as listed in public listings by the Governing Authority. The Contractor shall provide evidence of demolition to the Governing Authority, obtain receipt of such evidence by the Governing Authority, and shall submit these to Engineer immediately following demolition. Septic tank removal at known meth lab sites shall undergo preliminary assessment by an Industrial Hygienist or Certified Industrial Hygienist to determine proper removal and disposal. Work shall proceed per the recommendations of the Hygienist. METHOD OF MEASUREMENT
250.09 Environmental Health and Safety Management will not be measured but will be paid
for on a lump sum basis. This will include all work, materials, and hourly time charges by the HSO and other personnel required to accomplish the following: (1) Preparation, submittal and briefing of the initial HASP . (2) Preparation and submittal of the Waste Management Plan.
A.Preparation and Submittal of the Dewatering Plan.
B.Preparation and Submittal of the Remediation Plan. (3) Procedures and equipment specified in subsections 250.03 - 250.07. (4) PPE (levels C and D) for Contractor’s personnel for any contamination identified in the pre-construction investigations. (5) Preparation and submittal of the final site report. 250.10 250-15 The quantity to be measured for Health and Safety Officer will be the total number of hours that the Health and Safety Officer is actually used, as authorized, for the following work: (1) Field monitoring necessary to ensure the safety of workers on the site. (2) Hours in excess of the items listed under Environmental Health and Safety Management. (3) Hours that are necessary due to unforeseen site conditions. (4) Hours of additional consultation or field work that is requested by the Engineer. Equipment specified in subsection 250.03(a), preparation and submittal of the daily HSO diary, travel to and from the project site, and PPE (Levels C and D) required for use by the HSO will not be measured and paid for separately but shall be included in the hourly cost of the HSO. The quantity to be measured for Monitoring Technician will be the total number of hours that Monitoring Technician is actually used as authorized. Equipment specified in subsection 250.03(b), supervision of the MT , preparation and submittal of the daily m onitoring diary, travel to and from the project site, and PPE required for use by the MT (Levels C and D) will not be measured and paid for separately, but shall be included in the hourly cost of the MT . Solid stockpiled materials will be measured by the cubic yard computed from cross sections by the average end area or other acceptable method. Disposal of solid waste and solid hazardous waste materials will be measured by the cubic yard in the disposal container. Materials Sampling and Delivery will be measured by the actual number of samples collected, containerized, and transported to the testing facility indicated in the Contract. Additional environmental health and safety management work required and authorized by the Engineer, but not included in the items listed above, will be considered extra work to be paid for per subsection 109.04, unless such work is caused by the Contractor’s action. BASIS OF PAYMENT
250.10 Partial payment for Environmental Health and Safety Management, as determined by
the Engineer, will be made as the work progresses. The Contractor shall submit a schedule of environmental related Health and Safety Management work before the first partial payment is made. The schedule shall indicate the environmental related Health and Safety Management time for each work item that requires Contractor environmental related Health and Safety Management effort and the total time for the project. The accepted quantity for Health and Safety Officer will be the number of hours actually used and approved for payment by the Engineer and will be paid for at the contract unit price. The accepted quantity for Monitoring Technician will be the number of hours of onsite monitoring as approved by the Engineer and will be paid at the Contract unit price. Environmental Health and Safety Management, Health and Safety Officer and Monitoring Technician bid items shall include vehicles, phone charges, supplies, printing, postage, office support, and all other miscellaneous costs associated with the work. 250.10 250-16 Payment for Groundwater Handling (Containerization and Analysis) will be made per subsection 109.04. Payment for Soil Handling (Stockpile) will be made at the contract unit price for all excavated material required to be stockpiled for analysis. The contract unit price will be full compensation for furnishing all materials, labor, equipment, and incidentals necessary to complete this work, and all handling of the material before disposal. This includes haul, stockpile, and security. Payment for this work will be in addition to any payment made under other bid items for excavation, embankment, or backfill on the project, or waste disposal of this material. Payment for Solid Waste Disposal and Solid Hazardous Waste Disposal will be made at the appropriate contract unit price for the disposal of material determined to be either solid waste or solid hazardous waste. The contract unit prices will be full compen sation for furnishing all materials, labor, equipment, tools, storage containers for transport, containerization of material for up to 60 days, and incidentals necessary to complete this work. This includes all handling of the material, loading for dispos al, unloading for disposal, and borrow material required for replacement of excavated material disposed of offsite. It does not include stockpiling or containerization required for analysis that is included in the item Materials Handling (Stockpile and Containerization) paid for as described above. Payment for waste disposal fees and transport of hazardous waste will be made as shown below. Payment for this work will be in addition to any payment made under other bid items for excavation, embankment, bac kfill, or material handling (stockpile and containerization) on the project. (1) Solid Waste. Transport costs to the disposal facility and disposal fees will be included in the contract unit price for this work. (2) Solid Hazardous Waste. Transport costs, disposal fees, and treatment costs will be paid for by planned force account per subsection 109.04. (3) Liquid Hazardous Waste. Transport costs, disposal fees, and treatment costs will be paid for by planned force account per subsection 109.04. The cost of shoring required to limit the removal of contaminated materials to the specified limits shall be included in the contract unit prices for any excavation to be performed. Such shoring ordered by the Engineer in areas other than the specified ar eas of known or potential contamination, as shown on the plans, will be paid for per subsection 109.04. Payment for Materials Sampling and Delivery will be made at the contract unit price for each material sample collected, containerized, and transported to the laboratory testing facility as designated in the Contract. The contract unit price will be full compensation for furnishing all materials, labor, equipment, tools, and incidentals necessary to complete this work including required sampling kits, containers, sample splits, and quality control samples. The Contractor shall be responsible for damage caused by Contractor negligence to the environment, persons, or property. Expenditures associated with actions of the Contractor shall be borne by the Contractor at no cost to the project. Contaminated groundwater containerized, treated, or disposed under the requirements of this specification will be paid for by planned force account per subsection 109.04. 250.10 250-17 The accepted quantities will be paid for at the contract unit price for each of the pay items listed below that appear in the bid schedule. Pay Item Pay Unit Environmental Health and Safety Management Lump Sum Health and Safety Officer Hour Monitoring Technician Hour Materials Sampling and Delivery Each Materials Handling (Stockpile) Cubic Yard Solid Waste Disposal Cubic Yard 250.10 250-18 THIS PAGE INTENTIONALLY LEFT BLANK 304.01 304-1 DIVISION 300 BASES SECTION 304 AGGREGATE BASE COURSE DESCRIPTION
304.01 This work consists of furnishing and placing one or more courses of aggregate and
additives, if required, on a prepared subgrade. MATERIALS
304.02 Aggregate. The aggregates shall meet the requirements of subsection 703.03.
Acceptance will be based on random samples taken from each lift.
304.03 Commercial Mineral Fillers. Portland cement shall conform to subsection 701.01.
Hydrated lime shall conform to subsection 712.03. CONSTRUCTION REQUIREMENTS
304.04 Placing. If the required compacted depth of the aggregate base course exceeds 6
inches, it shall be constructed in two or more layers of approximately equal thickness. The maximum compacted thickness of any one layer shall not exceed 6 inches. When vibratory or other approved types of special compacting equipment are used, the compacted depth of a single layer may be increased to 8 inches upon request, provided that specified density is achieved, and written approval is given.
304.05 Mixing. The Contractor shall mix the aggregate by methods that ensure a thorough and
homogenous mixture.
304.06 Shaping and Compaction . Compaction of each layer shall continue until a density of at
least 95 percent of the maximum density has been achieved as determined per AASHTO T 180 as modified by CP 23. The moisture content shall be at plus or minus 2 percent of optimum moisture content. The surface of each layer shall be maintained during the compaction operations so that a uniform texture is produced, and the aggregates are firmly keyed. Moisture conditioning shall be performed uniformly during compaction. Compaction of each reclaimed asphalt pavement aggregate layer shall continue until a wet density of at least 95 percent of the maximum wet density when determined per a one-point AASHTO T 180, Method D test has been achieved. The surface of the base course will be tested with a 10- foot straightedge, or other approved device. The surface shall be tested before the application of any primer or pavement. The variation of the surface from the testing edge of the straightedge between any two contacts with the surface shall not exceed 1/2 inch. All irregularities exceeding the specified tolerance shall be corrected to the satisfaction of the Engineer at no additional cost to the Department. The above compaction and straightedge requirements shall not apply to shoulder gravel. Compaction of shoulder gravel shall be accomplished by wheel rolling, as directed.
Source: Colorado Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 317–334 of 943.