3_Garvey_PWS_Dec_22_2015_FINAL.pdf

ATTACHMENT 1

PERFORMANCE WORK STATEMENT (PWS)

Garvey Elevator OU1

Remedial Action – Phase II Garvey Elevator Superfund Site, OU 1

Hastings, NE

I. SITE BACKGROUND

The former Garvey Elevators, Inc. (Garvey) grain storage facility is a commercial grain elevator located approximately ½ mile southwest of Hastings, Nebraska, in Adams County. The Garvey Elevator Superfund Site (Site) includes the grain storage facility and off-property areas having groundwater contamination related to the grain storage facility’s operations.

The former Garvey property contains an active 8-million bushel capacity grain storage facility on a 22-acre parcel. It is currently owned and operated by Ag Processing Inc. (AGP). Garvey owned the grain storage facility from its construction in 1959 until 2005. The grain storage facility at the Garvey terminal consists of a concrete elevator head house and silos, flat-storage building, steel grain storage bins, and associated buildings (maintenance shop, office building and chemical storage shed). The area surrounding the grain storage facility is rural with a sparse distribution of residential properties north, east and west of the site.

Garvey used a liquid mixture of carbon tetrachloride (CCl4) and carbon disulfide (CS2) as a grain fumigant from 1959 to 1985. CCl4 and CS2 are CERCLA hazardous substances and are categorized as volatile organic compounds (VOCs). In 1960, Garvey installed a 3,000-gallon, above-ground storage tank (AST) north of the silos to store the liquid fumigant (refer to feature labeled “Former CCl4 AST” in Figure 2 of the design plans). The fumigant was transferred via piping from the AST to the silos’ grain application gallery on top of the silos. The section of piping between the AST and the side of the silos was buried (refer to feature labeled “Former Pipeline” on Drawing C-02 of the design plans). The piping exited the subsurface at the base of the silos and extended up the north side of the silos to the application gallery on top. In the mid-1970s, a release of CCl4 at the ground surface was noted in the area where the trucks drove over the underground piping. The buried portion of this delivery pipe was excavated and found to be broken in two places: one near the AST and one near the grain elevator. The piping was completely replaced at the time. Leaks and drips were reported to have occurred during the operation period of the AST and piping. Staining in the area beneath the valve of the AST was also observed.

Garvey ceased use of the liquid fumigant in 1985 and the AST and underground piping were removed in 1986.

The Site is located within the Loess Plains, a portion of the Great Plains physiographic province.

Topography of the area is relatively flat, with a slight slope to the east-southeast. The Site sits on a generally flat area with poor drainage that tends to pond water.

In April 2011, the U.S. Environmental Protection Agency (EPA) completed the Remedial Investigation (RI) which fully characterized the nature and extent of contamination in soil and groundwater at the Site. Field investigations at the grain elevator focused on those areas where contaminants were known to have been or potentially could have been released. These areas included the known source area of the former AST and buried piping, areas where pesticides or herbicides may have been stored or disposed of, areas where fumigant application equipment was washed and areas where electrical transformers were positioned.

Subsurface soil sampling was performed at multiple depths at 31 locations across OU 1. At one location near the former AST, soil sampling was performed approximately every 5 feet to a depth of 81.5 feet bgs. The other locations were sampled to total depths ranging between 10 and 20 feet bgs. CCl4 and/or CHCl3 were detected above the screening levels for the protection of groundwater at two locations, near the former AST and near the buried piping that transferred the fumigant from the AST to the grain elevator. At the location near the AST, the only CCl4 exceedance found was at 7 feet bgs. At the location near the buried piping, CCl4 exceedances were found at all four depths sampled from 4 to 20 feet bgs. Based on these results, it appears that soil contamination is present in the area directly adjacent to or beneath the former liquid fumigant AST and near the buried piping between the AST and the elevator. Subsurface soil samples collected from locations north, south and east of the former AST did not contain CCl4 or its degradation product CHCl3.

The EPA has organized the Site into two OUs. OU 1 is designated as the area of soil and groundwater contamination that is generally within the boundaries of the 22-acre parcel on which the grain storage facility formerly owned by Garvey was operated. OU 1 is commonly referred to as the source area.

OU 2 is the associated contaminated groundwater plume that extends east-southeast from OU 1 approximately four miles in the direction of groundwater flow. The effort required under this PWS is for OU 1 only.

A soil vapor extraction (SVE) system consisting of eight SVE wells, piping, knockout tanks, vacuum blowers, and control components exists at the elevator. This system was installed in 1998 and EPA continues to operate and maintain it. A groundwater extraction and treatment (GET) system consisting of eight groundwater extraction wells, piping, packed column air stripper, and control components also exists at the elevator. This system was installed in 1998 and EPA continues to operate and maintain it.

The SVE blowers, packed column air stripper, and control components are housed in a Quonset hut at the elevator.

II. DESCRIPTION OF REMEDIAL ACTION – PHASE II

The Interim Record of Decision (ROD) issued by EPA in September 2013 addresses the contaminated soil in the area designated as OU 1. The EPA’s Selected Remedy for OU 1 soils is excavation, treatment and disposal of contaminated soil and expansion and operation of the existing SVE system.

This procurement includes the following components:

• Excavation of contaminated soil in the vicinity of the former 2000-gallon above-ground-storage tank and buried transfer pipe. Volume of excavation estimated to be approximately 204 bank cubic yards;

• Treatment of the excavated soil by ex-situ SVE to meet cleanup goals;

• Confirmation sampling of walls of the excavated volume to determine if perimeter soils meet cleanup goals and possible excavation of any remaining contaminated soils;

• Backfill of the excavated soils with clean fill from an on-site borrow area;

• Disposal of treated soil in the on-site borrow area;

• Installation of two SVE wells near the former AST and buried transfer pipe;

Installation of piping to connect SVE wells to existing SVE system and integration into the existing SVE system are not included in this Performance Work Statement

III. BASIS OF DESIGN

A. Contaminants

The primary contaminant of concern identified in the 2013 Interim Record of Decision for the soils was CCl4, a VOC. The two other contaminants of concern, chloroform (CHCl3), a breakdown product of CCl4, and tetrachloroethylene (PCE) are present in lesser amounts.

B. General Conditions

The Contractor may work daylight hours, from dawn until dusk, 7 days a week. The Contractor may not work on Federal holidays. The Contractor is expected to clean up the worksite at the end of the working day, including picking up trash. Contractor shall keep the city streets clear of mud, dirt, and other related construction debris. The Government will not be responsible for any loss or damage to the property of the Contractor.

C. Tasks

The contractor is required to provide all specified services, including all management, supervision, labor, equipment, tools, materials, supplies, services and any other costs incidental to performance of the tasks included herein. The tasks mentioned are not all inclusive of the contract, but they do represent the major features of work for this contract.

TASK 1 – COMPLIANCE REQUIREMENTS AND COSTS

The contractor shall procure all permits, licenses, utility clearances, and certificates that may be required by law as well as comply with all federal, state, and local laws, ordinances, rules, and regulations applicable to the performance of this PWS and contract plans & specifications.

All plans and reports shall be in compliance with applicable federal regulations.

TASK 2 – MOBILIZATION AND DEMOBILIZATION

Contractor shall mobilize to site within thirty (30) days of approval of the Site Management Plan and Health and Safety Plan and provide sufficient personnel and field equipment to meet schedule requirements.

Contractor on-site personnel shall attend a safety briefing led by either the project manager or field site manager each day prior to beginning field work.

Contractor shall provide for logistics and establish equipment and materials lay-down and storage areas and support facilities. Contractor lay-down area is designated in the contract drawings.

Contractor shall maintain a positive drainage through the area between the flat grain storage building and the ex situ treatment area, borrow area, and treated soil disposal area.

Efforts include mobilization and demobilization of all necessary equipment to perform the work as outlined in the PWS and contract plans and specifications.

Power is not available at the site for use by the contractor. The contractor shall be responsible for acquiring necessary power where required.

Potable water is not available at the site for use by the contractor. The contractor shall provide a means of obtaining potable water from a source approved by the EPA Contracting Officer’s Representative (COR) and storing it, as needed.

Restroom facilities are not available at the site for use by the contractor.

TASK 3– EXCAVATION AND EX-SITU SOIL VAPOR EXTRACTION (SVE)

Contractor shall perform excavation and treatment of soils in accordance with contract plans, drawings and specifications.

Contractor shall not excavate below the bearing load of the adjacent grain silos without adequate excavation support. The excavation area is within approximately 10 feet of the vertical grain storage bins.

Contractor shall install the appropriate erosion and sediment control in accordance with specification section 01 57 13 prior to excavation activities. Erosion and sediment control shall be maintained until site restoration.

Contractor shall construct an above ground SVE treatment bed in accordance with the plans, drawings and specifications prior to conducing exploratory or initial excavation.

Prior to conducting exploratory or initial excavation, Contractor shall perform confirmation sampling of the borrow areas soils necessary to backfill the excavation area in accordance with the plans, drawings and specifications. The volume of soils characterized by the confirmation sampling shall be sufficient to backfill the initial excavation volume, as well as potential volume from ten (10) step-outs.

Contractor shall excavate two narrow trenches, each to a depth of 10 feet and maximum length of 20 feet to positively identify location of former buried CCl4 transfer pipe. The trenches shall be parallel to the main vertical elevator grain storage bins and shall be located approximately 20 feet and 40 feet from the bins and centered about the buried piping location shown in the drawings.

Contractor shall shift the excavation area, defined in the contract drawings, such that it is centered over the location of the former buried CCl4 transfer pipe. Location of the excavation area shall remain as in the contract drawings in the event the location of the former buried CCl4 transfer pipe is not identified.

Contractor shall excavate the approximately 204 bank cubic yards of soil to the “Initial Limits of Excavation” specified in the contract drawings.

Contractor shall perform confirmation soil screening and sampling in accordance with plans, drawings, and specifications.

Step-outs of the excavation area may be necessary, depending on site conditions as determined by the results of sidewall confirmation sampling.

Contractor shall excavate to a depth of 10 feet below ground surface in accordance with specification section 31 23 16 in the initial excavation and step-out areas.

Contractor shall provide temporary excavation support per specification section 31 50 00. Shoring plan must be reviewed and approved by professional engineer prior to submitting to Government for approval.

Contractor shall transport excavated soil to the SVE treatment bed. Contractor shall transport backfill soil from the borrow areas to the excavation area. The SVE treatment area / borrow area / treated soil disposal area is located approximately 600 feet from the excavation area.

Contractor shall backfill and compact borrow soil in the initial excavation area and step-out areas in accordance with the plans, drawings and specifications.

Contractor shall operate the SVE treatment bed in accordance with the plans, drawings and specifications for a minimum of 1 week after the final soil load has been placed and until it is demonstrated by confirmation soil sampling that cleanup levels have been achieved.

Contractor shall establish and monitor a set of deformation monitoring points on structures, paving, and utilities near the excavation. Contractor shall measure and record baseline elevations and coordinates before the start of excavation. Contractor shall survey no less than once per day during excavation and twice weekly during backfilling. Contractor shall compare surveys to baseline survey throughout activities.

TASK 4 –INSTALLATION OF NEW SVE WELLS

Contractor shall install two new SVE wells using hollow-stem auger techniques in accordance with the plans, drawings and specifications.

Contractor shall perform performance testing of the two new SVE wells and three existing SVE wells to determine their ability to draw a minimum air flow in accordance with the plans, drawings and specifications.

Contractor shall finish each well head of the two new SVE wells in a concrete utility vault rated for H- 20 loads.

Contractor shall trench, bed and backfill conveyance pipe from the two new SVE wells to the treatment building. Contractor shall connect the conveyance pipe to their respective header pipes at the treatment building.

TASK 5 – INSTALLATION OF VAULTS AND PIPING FOR EXISTING SVE WELLS

Contractor shall install H-20 rated concrete utility vaults on each of the three existing SVE wells that is determined by the performance testing in Task 4 to have met the criteria for minimum air flow.

Contractor shall trench, bed and backfill conveyance pipe from each of the three existing SVE wells – that is determined by the performance testing in Task 4 to have met the criteria for minimum air flow – to their respective header pipes at the treatment building.

TASK 6 – RESTORATION OF DISTURBED AREAS

Site restoration of the soil excavation area shall start only after excavation, trenching, backfill and compaction activities are completed, as specified in sections 02 61 13 and 31 23 16.

Site restoration of the areas disturbed during SVE related activities shall start only after installation of new SVE wells and well vaults and connection of SVE wells to the SVE system is completed, as specified in sections 03 40 00, 31 23 16, 33 11 00 and 33 23 00.

Contractor shall restore the ex situ treatment area, borrow area, and treated soil disposal area in accordance with the plans, drawings and specifications.

Seeding shall be as specified in accordance with section 32 92 19.

I. SCHEDULE

The Contract duration is six (6) months from the time of contract award. Confirmation of the suitability of the borrow soils through analysis of collected samples shall be performed prior to, or simultaneous with, the start of excavation of the excavation area. A preliminary construction schedule is provided as Figure 8.1 of the design plans. The Contractor shall submit an actual schedule as part of the Contractor Quality Control Plan.

II. CONTRACT DELIVERABLES

A complete list of contract deliverables is specified in the Submittal Register, located within the contract Specifications at the end of specification section 01 33 00. A list of pre-construction work plans to be reviewed by EPA are listed below:

1. Site Safety and Health Plan

2. Spill and Discharge Control Plan

3. Environmental Protection Plan

4. Contractor Quality Control Plan

5. Sampling and Analysis Plan

6. Offsite Disposal Plan

7. Ex-situ SVE Treatment Plan

8. Excavation Plan

9. Shop Drawings and Design Calculations for Excavation Support System

10. Decontamination Pad Design

Drafts versions of the work plans listed above shall be submitted as a part of the technical proposal.

The COR will provide comments for Contractor review and inclusion. Final work plans are due twenty-one (21) days from COR submission of comments. The Contractor shall submit statements and certifications specified in specifications 01 35 29, 01 35 30, 01 43 00, 01 43 16, 02 81 00, 13 30 20, 31 00 00, 31 50 00, and 33 23 00 within thirty (30) days of contract award.

III. PERSONNEL QUALIFICATIONS; KEY PERSONNEL REQUIREMENTS

KEY PERSONNEL 1: PROJECT MANAGER

The Project Manager (PM) shall be the on Site contractor point of contact with the EPA RPM/COR, and shall be responsible for the management and execution of all response actions. The PM does not have to be on Site while work is progressing in the field. The PM shall demonstrate the following minimum qualifications and experience:

Project Manager

1) B.S. degree or above

2) A minimum of three (3) years (in the past five (5) years) of on-site field experience in the following:

a. Any combination of earthmoving, demolition, and environmental hazardous/contaminated waste, but must have experience in all 3 areas to qualify as the PM.

b. OSHA 10-hour Construction Outreach training

c. 40 hour OSHA HAZWOPER training and be up to date on HAZWOPER 8 hour annual refreshers.

Project Manager without a B.S. Degree A minimum of five (5) years (in the past ten (10) years) of on-site field experience the following:

a. Any combination of earthmoving, demolition, and environmental hazardous/contaminated waste, but must have experience in all 3 areas to qualify as the PM.

b. OSHA 10-hour Construction Outreach training

c. 40 hour OSHA HAZWOPER training and be up to date on HAZWOPER 8 hour annual refreshers.

KEY PERSONNEL 2: SITE SUPERINTENDENT

The Site Superintendent (SS) directs and oversees work activities at the direction of the PM and is required to be on-site throughout the project while work is occurring.

The Site Superintendent (SS) is the on-site point person overseeing all the project work and is required to be on-site throughout the project while work is occurring. The SS must demonstrate and describe at least five (5) combined years’ experience as a SS in a combination of the following features:

earth moving, demolition, managing and supervising hazardous cleanup personnel. The Site Superintendent must have experience in all multiple areas to qualify for the position. Years’ experience can occur concurrently. SS must have OSHA 10 hour Construction Outreach training and 40 hours OSHA HAZWOPER training and be up to date on HAZWOPER training and be up to date on HAZWOPER 8 hour annual refreshers.

NON-KEY PERSONNEL REQUIREMENTS

All on site contractor personnel shall have completed Hazwopper training and/or be current with refresher course requirements.

POST-AWARD CONFERENCE

A post-award conference will be held via telephone within two (2) weeks of contract award to (a) achieve a clear and mutual understanding of all contract requirements and, (b) to identify and resolve potential problems. Attendance will be required by representatives of the contractor and the

Environmental Protection Agency. The cost of the conference is considered a component of the final contract price and will not be billed separately.

EPA BACKGROUND CHECKS FOR ON-SITE EMPLOYEES

The contractor shall provide qualified personnel that meet the background check requirement identified below. The EPA has established 2 levels of criteria. Level 1contains background check criteria applicable to all contractor employees working at a response site. Level 2 contains background check criteria requirement that apply to all contract employees working at sites that are designated by EPA as "Sensitive Sites." Examples of sensitive sites include those that involve law enforcement activities, apparent or suspected terrorist activities, any indoor cleanups (including private residences), drug lab cleanups, and response actions at geographically sensitive locations such as military installations and government buildings. The Site involved in this procurement is a Level 1 site. The Contracting Officer or On-Scene Coordinator will notify the contractor whenever EPA designates a response site as a sensitive site. The designation will be provided to the contractor in the task order, work assignment, or verbally, as the situation warrants. If the designation is provided verbally, the contracting officer will issue a written designation as soon as practicable after the verbal notification.

LEVEL 1- EPA Background Check Criteria:

• Can be a non U.S. citizen with a valid visa,

• No convictions for crimes involving issues of National Security. A "national security crime" is defined as any criminal activity involving espionage or foreign aggression against the United States, intelligence or counterintelligence activities, concerned with undermining or overthrowing the government of the United States and unlawful handling or disclosure of classified information.

• No weapons offense in the last five (5) years,

• No felony conviction in the last three (3) years,

• Not a fugitive from justice,

• Not listed in the Excluded Parties Listing System (EPLS). EPLS is a web-based database that identifies parties excluded throughout the U.S. Government from receiving federal contracts or subcontracts. The EPLS is available at: http://epls.gov

LEVEL 2 - EPA Background Check Criteria For Sensitive Sites:

• Must be a U.S. citizen,

• No convictions for crimes involving issues of National Security. A "national security crime" is defined as any criminal activity involving espionage or foreign aggression against the United States, intelligence or counterintelligence activities, concerned with undermining or overthrowing the government of the United States and unlawful handling or disclosure of classified information.

• No weapons offense in the last ten (10) years,

• No felony conviction in the last seven (7) years,

• No misdemeanor conviction in the last five (5) years,

• No convictions for three (3) separate offenses in the last ten (10) years (excluding traffic offenses),

• Not a fugitive from justice,

• Not listed in the Excluded Parties Listing System (EPLS). EPLS is a web-based database that identifies parties excluded throughout the U.S. Government from receiving federal contracts or subcontracts. The EPLS is available at: http://epls.gov http://epls.gov/

The requirements in Level 1 or 2 may be waived by the Contracting Officers, on a case- by-case basis, at a specific location, or for a specific individual.

If the results of an employee's background check do not meet the criteria in either level l or 2, as required, the Contractor may apply for a waiver. To initiate the waiver process, the contractor must submit, in writing, the background report on the employee and an explanation of the need for the employee. The Director of the Superfund/RCRA Regional Procurement Operations Division must approve the waiver before the employee performs contract services for EPA. The contracting officer will notify the contractor of the Agency decision within five (5) days of receipt of the contractor's request for a waiver.

The contractor shall submit its request to the Director, Superfund/RCRA Regional Procurement Operations Division at:

By Mail:

U.S. Environmental Protection Agency Director, SRRPOD Mail Code 3805R 1200 Pennsylvania Avenue, NW Washington, DC 20460

By Courier/Hand Carried:

U.S. Environmental Protection Agency Director, SRRPOD Bid and Proposal Room Ronald Reagan Building, 6th floor, Room 61107 1300 Pennsylvania Avenue, NW Washington, DC 20004

The Bid and Proposal Room hours of operation are 8:00 AM - 4:30 PM weekdays, except Federal holidays.