Definable Features of Work

The project tasks for this CTO are grouped into definable features of work, which are work activities that are significant enough to warrant distinct plans and specifications. The definable features of work for this project are:

• Mobilization and Site Preparation

• Treatment Well and Monitoring Well Installation

• Field Piping/Trenching

• System Installation

• Surveying

• Sampling (aqueous, solid, air, waste)

• System Startup and O&M

• Waste Management

• Cleanup and Site Restoration

• Decontamination and Demobilization

The definable features of work will be inspected in accordance with the three phases of control. The three phases include Preparatory, Initial, and Follow-up. An overview of the inspection provisions is outlined in the subsections that follow.

6.8.1 Mobilization and Site Preparation

As part of the mobilization activity, a pre-construction meeting will be held to review project scope, schedule, communications, and field documentation and reporting. The meeting will verify that site preparation provisions, such as permitting/approvals; utility clearances; demarcation of the work zones; staging of equipment and material; stormwater runoff and erosion controls; as well as other devices to be used at the site, are in place to begin the field activities. Additionally, equipment and materials will be verified functional and in good operational condition prior to starting the field work.

Preparatory Phase

The preparatory phase will include a review of the relevant activity hazard analyses (AHAs), communications matrix, project schedule, submittal status, work zone layout, and confirmation that appropriate materials and equipment are available. A dig permit is in place. Personnel training and medical clearance records will be reviewed.

Initial Phase

Inspections will be made as necessary to ensure construction limits are defined, utilities marked, and material staged in the designated areas. Additionally, equipment will be inspected for operability and proper function. Deficient equipment will not be permitted to operate.

Follow-up Phase

The Project QC Manager will provide continuous oversight of the site preparation activities to verify that the work is completed in accordance with the requirements provided in this work plan addendum. Deficiencies will be documented and corrected.

Task Inspection Details Pre-Construction

Meeting

• Verify training and medical clearance

• Verify Dig Permit in place

• Verify designated locations of equipment layout and material staging

• Discuss maintaining mark-up drawings and recording field data

Site Preparation • Review pre-construction and construction quality control submittals to ensure they are approved

• Review personnel certifications and licenses for performing particular work

• Confirm that field equipment is properly setup and calibrated and in operational condition

• Confirm that the materials and equipment are stored properly in accordance with the work plan addendum

• Review site security measures

• Discuss construction schedule

• Ensure the erosion controls are installed properly

• Review the H&S plan and PPE requirements

• Ensure MSDSs are onsite

6.8.2 Treatment Well and/or Monitoring Installation

The preparatory inspection for treatment well and/or monitoring well installation activities will include review of the construction drawings, the site-specific work plan, and

specifications, verifying the submittal approval, confirming qualifications and schedule of the well driller, verifying that appropriate materials are present, and confirming that the appropriate equipment and geologists and/or technicians are available to complete the work.

Initial Phase

Prior to the treatment well and/or monitor well installation activities, the Project QC Manager will complete an initial inspection of the augers to verify that they have been properly decontaminated. The locations of the treatment wells and monitoring wells will be shown on the site plan provided in the work plan. Deficiencies will be documented and corrected as necessary.

Follow-up Phase

A geologist or other approved technical representative and the Project QC Manager will be responsible for oversight of well installation activities. Oversight activities will include verification that the work is being completed according to the technical specifications and the well details provided on the construction drawings. Attention will be placed on total well and screen depth, well materials, and filter pack materials and depths. The Project QC Manager will verify that the installation procedures are completed in accordance with the requirements provided in the work plan, technical specifications, and the well details provided on the construction drawings. Deficiencies will be documented and corrected as necessary.

Task Inspection/Control Well Drilling Confirm that necessary permits, applications, and other required documents

have been obtained.

Confirm the monitoring well installation location.

Confirm that drilling conforms to state and local regulations.

Confirm that oversight is provided by a Florida registered geologist or engineer.

Confirm that proper decontamination procedures are used.

Confirm that the boring is the correct size and depth.

Confirm that the well has been developed in accordance with this Work Plan Addendum.

Confirm that appropriate drilling activity records are kept.

Well Construction Confirm that no glue, solvents, or pipe dope is used in the well casing construction.

Confirm that new, unused PVC is used for the well casing and an appropriate slot size is used for the screen.

Confirm that well screen is placed in correct interval.

Confirm that the appropriate filter pack and seal is used.

Confirm that the appropriate flush-to-ground well head completion is installed.

Confirm that appropriate well construction records are kept.

Well Development Confirm that development is completed between 24 and 48 hours after construction.

Confirm that the number of well volumes of groundwater specifiied in this Work Plan Addundum are removed from the well and pH, temperature, specific conductance, and turbidity have stabilized.

Decontamination and Investigation Derived Waste (IDW) Disposal

Confirm that soil cuttings, purged groundwater, and sampling equipment IDW are disposed according to this Work Plan Addendum.

Confirm that sampling equipment is decontaminated or disposed of properly.

6.8.3 Field Piping/Trenching

The preparatory phase for the installation of the pipe and utility trenches will include a review of the site plan, construction drawings, work plan, technical specifications, submittal status, confirmation of appropriate materials and construction equipment, worker

qualifications and availability, and equipment availability.

Initial Phase

Initial inspections of the pipe trench will be completed when a representative portion of the trench has been excavated. The Project QC Manager will verify that the depth and slope are being maintained according to the construction drawings and technical specifications.

Follow-up Phase

The Project QC Manager will provide oversight during trench and piping installation activities. The Project QC Manager or Site Superintendent will document the length, depth, and location of the trench, pipe placement, and bedding and cover material in the trench.

Daily observation will verify compliance with the construction drawings and technical specifications. Fill activities will be inspected to verify proper placement, soil loading, and compaction, where necessary. The Project QC Manager will conduct inspections to verify that the work, pipe materials, and associated equipment are in accordance with the

construction drawings, the requirements provided in the work plan, and technical specifications. Deficiencies will be documented and corrected.

6.8.4 System Installation