STATEMENT OF WORK
FOR
CONSTRUCTION
Requisition #: DRAFT
Title: Remediation of Waste Sites at 100K Area
Revision Number: A
Date: 08/09/2016
TABLE OF CONTENTS
DIVISION 1 – GENERAL REQUIREMENTS
Section 01010 Summary of Work
Section 01019 Items Furnished for Construction (CHPRC-Furnished Equipment)
Section 01036 Request for Clarification (RCI) and Changes
Section 01040 Coordination
Section 01050 Field Engineering
Section 01065 Permits
Section 01110 Occupational Safety / Industrial Hygiene
Section 01130 Environmental, Radiological, and Nuclear Safety
Section 01150 Training and Qualifications
Section 01200 Project Meetings
Section 01300 Submittals
Section 01315 Project Schedules, Project Controls, and Project Performance Milestones
Section 01400 Quality Assurance and Control
Section 01500 Construction Facilities and Temporary Controls
Section 01610 Material and Equipment Delivery, Storage, and Handling
Section 01630 Product Options and Substitutions
Section 01720 Project Record Documents
SECTION 01010
SUMMARY OF WORK
PART 1 – GENERAL
1.1 INTRODUCTION / BACKGROUND
CH2M HILL Plateau Remediation Company, LLC (CHPRC) as a prime contractor to the U.S. Department of Energy requires field remediation of waste sites and burial grounds located within the Hanford Site’s 100K Area. These are legacy waste site related to nuclear reactor operations and fuel production comprising liquid waste disposal cribs and trenches, buried pipelines and areas contaminated by operational leaks and accidental spills.
1.2 DESCRIPTION OF WORK - GENERAL
1.2.1 Work is located in the 100 Area of the Hanford Site and is located approximately 40 road miles north of Richland, Washington.
1.2.2 Work consists of remediation of up to twelve (12) waste sites as described herein. Contractor shall remove, treat, and dispose of radiological and chemical hazards that includes excavation of up to 130,000 tons of contaminated soils to be retrieved and loaded into roll-off waste containers, 700 linear feet of ≤ 24 inch diameter pipe, and 700 linear feet of > 24 inch diameter pipe.
1.2.3 Interim backfilling of the sites is required. Overburden and gravel from an on-site pit will be used to perform this work.
1.2.4 Contractor shall provide a trailer for offices, lunch room, and pre-job meetings, and a bathroom trailer at the worksite. Power is in place and provided by CHPRC. A container queue and tarping tent is provided by CHPRC.
1.2.5 The contractor is responsible for providing a drive on scale, haul road, repair and maintenance tent, and lighting repair and maintenance.
1.2.6 The total depth of any excavation will not exceed 20 feet.
1.3 DESCRIPTION OF WORK - SPECIFIC
1.3.1 Included Work: The following identifies major work elements only. The work is considered a “remove, treat, and dispose” activity that includes up to twelve (12) radiological and chemical contaminated sites. These sites collectively contain about 130,000 U.S. tons of contaminated material that must be removed and placed in CHPRC-provided roll-off containers. In addition, to this material there is approximately 700 linear feet of piping that is less than or equal to 36 inches in diameter and another 700 linear feet of piping that is greater than 36 inches in diameter.
Interim backfill of the waste sites shall be required. Overburden and gravel will be available from a near-by pit for Contractor use in performing the work.
1.3.1.1 Provide and manage labor, equipment, material, and services required to complete work. Labor includes participation of Contractor’s employees in training and medical examinations required by Contract. Contractor shall provide Plan of the Day/Office Trailer; Bathroom trailer and/or portable toilets with associated janitorial/maintenance services for men and women on the job site all site; preparatory and compliance material such as, drive on load scales, signs/postings, rope, container liners, container socks, fence posts, and soil fixative.
1.3.1.2 Before receiving Notice to Proceed for excavation, the Contractor shall participate in a readiness assessment/review to demonstrate to CHPRC that all required documentation is in place and that its personnel, procedures, submittal and equipment are ready to commence work. CHPRC will review all documents and discuss readiness with Contractors key personnel prior to issuing a Notice to Proceed
1.3.1.3 Work consists of waste sites as follows;
1.3.1.3.1 100-K-100: The waste site is the discovery of potential contaminated soil and material adjacent to the remediation area. The107-KW Retention Basins had been located in this area, but were removed in 1995 (see site code 116-KW-3). Some radioactively contaminated soil and material were found adjacent to the area where the 107-KE basin.
1.3.1.3.2 100-K-99: While constructing the 100K Container Transfer Area north of 105-KE, excavation unearthed radioactive contaminated Grifflon material. The 107-KE Retention Basins had been located in this area, but were removed in 1995. The bottoms of the 116-KE-4 retention basin tanks were left in place during interim stabilization of the site in 1995. However, CERCLA remediation of the site was later performed with removal of the tank bottoms, piping, debris and underlying contaminated soil (CVP-2005-00002). The site was excavated to a maximum depth of approximately 14.1 feet. When the cleanup standard was met at 116-KE-4 in 2005, the radiological posting was removed. It is believed that residual contaminated material from 116-KE-4 was identified in 2009 (116-KE-4) were removed. Since the basin removal at 107-KW (116-KW-3) was an identical activity, the potential exists for contaminated soil and material to also be found adjacent to this excavation area.
1.3.1.3.3 1607-K5 Septic Tank: This septic tank and drain field are east of the 105-KE Reactor and west of the 118-K-1 Burial Ground. The unit received sanitary sewage from 1706-KER Flow Laboratory, 1706-K Water Treatment Laboratory, 165-KE Powerhouse, 105-KE Reactor Building, and 115-KE Gas Recirculation System the flow rate to this unit is estimated to have been at 700 gallons per day.
1.3.1.3.4 100-K-107 Abandoned Drain Field: The 1706-KER facility provided experimental data on the effect of water qualities, water temperature and pressure, and physical and chemical properties of materials of construction upon reactor operation and control, upon reactor tubes and slugs, and upon associated equipment when operating closed in-pile recirculation systems at elevated temperatures and pressures. It was also known as a decontamination and hot shop. Effluent from the building toilets and floor drains exited the facility via a 10.2 centimeter (4 inch) drain line to this drain field.
1.3.1.3.5 100-K-108 Septic Tank: The 1706-KER facility provided experimental data on the effect of water qualities, water temperature and pressure, and physical and chemical properties of materials of construction upon reactor operation and control, upon reactor tubes and slugs, and upon associated equipment when operating closed in-pile recirculation systems at elevated temperatures and pressures. It was also known as a decontamination and hot shop. The septic tank has a 2271 liter (600 gallon.) capacity tank, measuring 1.37 meters (54 inches) diameter by 1.78 meters (70 inches) depth. It is asphalt coated. The septic tank weighs 197 kilograms (435 pounds) and is constructed of 14 gauge steel. The crib is 1.8 meters (6 feet) wide by 2.1 meters (7 feet) tall. It was constructed of 15.2 by 15. 2 centimeter (6x6 inch) treated (coal tar creosote) wooden timbers. The outside of the crib is covered with wire mesh. A 10.2 centimeter (4 inch) vent pipe exits the top of the crib. During operation of the building, the crib was surrounded by wood guard posts. The pipeline has a minimum soil cover of 0.8 meters (2.5 feet).
1.3.1.3.6 116-KE-2 Waste Crib and Pipeline: The crib dimensions are 3 meters (10 feet) by 3 meters (10 feet) by 3 meters (10 feet) rests 0.9 meters (3 feet) above the bottom of an excavation. The length and width of the excavation measured approximately 9.1 meters (30 feet) by 9.1 meters (30 feet) at grade and 4.9 meters (16 feet) by 4.9 meters (16 feet) at the base, and was 10.5 meters (34.5 feet) deep. The bottom 3 meters (10 feet) of the excavation was filled with crushed stone then backfilled. The distribution pipes enter the crib structure 7 meters (23 feet) below grade. The side slope ratio was 1:1. The site also includes two 5.1-centimeter (2-inch) steel schedule 40 pipelines that terminate at the west wall of the 1706-KER Building approximately 6.1 meters (20 feet) below grade. The pipelines are approximately 55 meters (180 feet) long. The waste site is a wooden crib structure and the associated piping. A large excavation, approximately 30 feet deep, was required to accomplish the demolition activities. Some excavation backfill was done in 2012.
1.3.1.3.7 100-K-103 Settling Tank: This site comprises seven components of the 1717K Septic System (1607-K4) that were not included in the Closed Out documentation for the 1607-K4 waste site. 100-K-103 includes the Original Tile Field, the Replacement Septic Tank, one Leaching Trench and four distinct Replacement Tile Field, built in 1995. The additional septic system components surround the Closed Out 1607-K4 Septic Tank and Tile Field. All of the components are located north of the 1717K building, inside the 100-K Area.
1.3.1.3.8 1607-K1 Septic Tank: The sanitary sewer system is composed of a septic tank, leaching trench and associated piping. The septic tank and dosing chamber are composed of reinforced concrete per Hanford Standard E-5-11. There is a maximum of 1.5 meters (5 feet) of fill on the cover slab. There are 61 meters (200 feet) of 15 centimeter (6 inches) vitrified clay pipe to the septic tank, followed by 6.1 meters (20 feet) of 15 centimeter (6 inches) vitrified clay pipe to the leaching trench. The leaching trench contains 9.1 meters (30 feet) of 15 centimeters (6 inches) vitrified clay pipe laid with open joints.
1.3.1.3.9 100-K-80 River Effluent Pipeline: 100-K-80 is a 213 centimeters (84 inches) diameter, carbon steel river effluent pipelines that extends from the face of 116-K-3 outfall structure to the Columbia River. The 100-K-96 pipeline runs parallel to 100-K-80. The pipelines are approximately 122 centimeters (48 inches) apart.
1.3.1.3.10 100-K-81 Contamination Area: The site consists of a large cylindrical piece of equipment (tank) surrounded by a rope and posted as Soil Contamination Area. The posted Soil Contamination area is adjacent to 116-K-3 Outfall Structure, approximately 6.1 meters (20 feet) west of the Outfall Structure fence. It is inside the boundaries of the 100-K-64 (Flood Plain) radiologically posted area.
1.3.1.3.11 100-K-83 Outfall: The 100-K-83 spillway (also referred to as a flume) was a combination of a three-sided, reinforced concrete trough beginning at the 116-K-3 Outfall, followed by an open earthen trench extending from the end of the concrete trough to the Columbia River shore. During decommissioning work performed during the 1980's all but the uppermost 15 meters (50 feet) of the concrete portion of the spillway were demolished and covered with soil.
1.3.1.3.12 100-K-96 100KE River Effluent Pipeline: 100-K-96 is a 213 centimeters (84 inches) diameter, carbon steel river effluent pipelines that extends from the face of 116-K-3 outfall structure to the Columbia River. The 100-K-80 pipeline runs parallel to 100-K-96. The pipelines are approximately 122 centimeters (48 inches) apart.
1.3.2 Excavation Operations
Each waste site shall be excavated in compliance with the earthwork plan, unless otherwise directed by Buyer. The ACL material shall be temporarily held within the AOC or Buyer-approved staging piles, in accordance with the Contract documents, until the material is sampled and released by the Buyer. Loaded containers shall meet survey requirements prior to pick up and release from the contaminated area.
The Contractor’s approach to excavation shall be coordinated in advance with the Buyer to maximize sampling efficiency, minimize the amount of uncontaminated material excavated, and assure that unknown waste and excavated materials with no identified disposal path remain within the AOC, and are neither transported to staging pile areas nor loaded out into ERDF transportation containers.
The Contractor shall excavate soil and debris to the lines and grades shown on the Project Drawings for Contractor processing. Excavations shall be conducted in accordance with Contract documents and in a safe manner for the type of soil and or debris present at a given location.
The Buyer will provide radiological surveying to support the excavation and sorting operations using a graded, observational approach.
The Contractor will observe the excavation and sorting operations continuously. Observations and radiological surveying shall be for items that could contain liquids, greater than Class C radioactive material, asbestos, PCBs, discolored or anomalous soil or discrete items, sealed containers, sludge, mercury, high dose rate items greater than 100 mrem/hr at 30 cm, metallic objects with densities or weights higher than other metallic objects encountered, unknown media and waste forms requiring further evaluation, or other materials potentially not meeting the ERDF waste acceptance criteria (WAC) and ERDF Supplemental WAC. The Contractor shall remove and segregate this material within the AOC or staging pile area, at the direction of the Buyer, and place it in the AOC or staging pile for supplemental characterization and identification by the Buyer. If encountered, high-dose rate items greater than 100 mrem/hr at 30 cm on contact will be stored in a shielded bunker provided by the Contractor. Staging pile areas outside the AOC shall be as directed by the Buyer and in accordance with the Contract Documents. Staging areas shall be surrounded by berms to control runoff. During the removal, sorting, and segregation process, the Buyer may direct the Contractor to place potentially dangerous waste such as (but not limited to) pieces of elemental lead, batteries, and jars into Buyer-provided drums or containers. After the necessary items are removed from the excavated material, the remaining soil and debris shall be placed in the staging pile area for characterization work.
The physical limits of the pipeline-related excavation, demolition, and removal work are as follows:
· Required depth of excavation is 0.305 m (1 ft) beneath the lowest point of all pipelines, concrete, and other engineered structures.
· Side slopes of 1.5 horizontal to 1 vertical (1.5:1).
· Base width of trench to be determined by Contractor to allow safe access for project personnel. A minimum excavation base width of 1 m (3.28 ft) laterally beyond the plan-view extent of the pipeline or structure is required.
The control points and depths shown on the Project Drawings are the expected lateral extent and maximum depth of the excavation. However, it is possible that actual waste site contamination locations may vary from the boundaries shown on the Project Drawings. Consequently, the Buyer reserves the right to alter the shape of excavations. Should the Buyer choose to exercise this right, the Contractor shall excavate to revised limits. The actual volume of soil and debris removal will be determined by the Buyer as excavation progresses.