Attachment 1 - Form and Content of the Remedial Investigation Work Plan
The following is a general framework for RI work plans. Additional site specific information should be included where appropriate. The report should be referenced where appropriate and be thorough but concise.
Introduction
- the purpose for the investigation
- when and by whom the work was authorized
Scope of Work
- description of services to be performed at the site
Phase I Report
- see ASTM E 1527, MDA Site Files
Site Description
- soil type(s)
- estimated depth to ground water
- anticipated regional ground water flow direction
- anticipated hydrogeology
- topography
- list of references
Sample Collection
- sample locations and rationale (locate on site map)
- soil sample plan (types and depths)
- number of borings to be completed
- number of samples to be collected
- ground water sample plan
- number of wells and locations (locate on site map)
- sample analysis parameters
- field screening methods, supporting documentation and how they are to be used
- sample analysis plan describing which samples will be analyzed and which will be held frozen
- borehole abandonment methods
Sample Collection Procedures (consult guidance documents for details)
General:
- sampling equipment
- equipment decontamination methods
- sample storage, containers, transport, preservation, handling and chain of custody
Soil:
- drilling method and borehole diameter
- sample intervals (analytical and lithologic)
- how samples will be collected
- lithologic classification methods
- sample type (composites, discretes)
- how and when samples will be split
Ground Water:
- water level measurement
- well stabilization
- how samples will be collected
- decontamination and QA/QC procedures
- sample preservation
Surface Water:
- permanent sample location and depth
- how samples will be collected and characterized
Field Screening Methods
- how and when they will be used
- procedures for use
- detection limits
- percent fixed laboratory confirmation
Analytical Laboratory
- name of laboratory performing analysis (must have QA/QC and analytical methods approved and on file with MDA)
- sample holding time
- approximate sample turnaround time
Well Drilling and Installation Methods
- well locations and explanation of location selection
- sampling interval
- construction methods (drilling method, well diameter, screen length and placement, well protection)
- construction materials (screen and riser materials, filter pack and interval, seal materials)
- compliance with MDH Water Well Code
- collection and disposal of cuttings and purge water but only when sampling highly contaminated soil in public areas
- well development
- equipment decontamination
- well abandonment procedures
Maps
- topographic map with site location indicated (adapted from USGS quads)
- soil map and legend, if available
- site map showing all permanent structures (labeled), high risk areas and proposed sampling or well locations
- outline of investigation areas, approximate boring locations and well locations
Contamination Impacts Survey (see Attachment 2)
- how and when it will be conducted
Work Schedule
- proposed timetable for work to be performed
Costs
- outline of costs associated with proposed work
