12443926Q0208 Attachment B Statement of Work CodyCady.docx

Attachment B – Statement of Work, Cody/Cady Mine Site Inspection

STATEMENT OF WORK

CERCLA Site Inspection for Cody/Cady Mine, Mark Twain National Forest, Wayne County, Missouri

Project Overview The United States Forest Service (USFS) requires a Contractor to perform a Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) Site Inspection (SI) at the Cody/Cady Mine Site (Site) located on the Mark Twain National Forest (MTNF) in Wayne County, Missouri.

The Cody/Cady Mine Site is a Forest Service managed abandoned iron mine from the 1910’s that is believed to contain surface level waste rock with potentially high arsenic (As) concentrations. There has been minimal work in the past to evaluate the extent of contamination due to mining activities and any potential release of contaminants.

The purpose of the SI is to determine the presence of onsite soil contamination and its extent. The SI activity shall include soil sampling and the creation of an SI report.

The sampling will employ incremental sampling methodology (ISM) soil sample collection, to be processed and analyzed in a laboratory to evaluate an unbiased estimate of the mean concentration of the contaminants of concern (COCs) in soil which include the US EPA target analyte list (TAL) metals. The work includes field collection of 27 soil samples along with 12 QA replicates for a total of 39 field samples with 30 aliquots each. Each Decision Unit (DU) will be sampled and no less than 20% of the DUs will receive triplicate QA replicates. The DUs will vary in size and shape and will require the investigator to determine the locations of the 30 aliquots to adequately cover the entire DU. The field work will be followed by laboratory processing by drying, disaggregating, sieving, milling, using a COR approved lab SOP and analysis of the resulting samples using SW-846 Methods. There shall also be 4 replicate laboratory QC subsamples along with trip blanks, method blanks, and processing equipment blanks per the laboratory SOP.

All work shall follow Environmental Protection Agency (EPA) guidance and shall be subject to USFS review and acceptance by the Forest Service Contracting Officer’s Representative (COR). Contractor shall utilize analytical methods in USEPA publication SW-846, Test Methods for Evaluating Solid Waste, Physical/Chemical Methods (SW-846 Methods), defensible under CERCLA.

Project Objectives The objective of this project is to perform a CERCLA SI for the Cody/Cady Mine Site. The Site is located on federal lands administered as part of the MTNF in Missouri. The SI shall be consistent with the requirements of the NCP and applicable EPA Guidance, including EPA Guidance for Performing Site Inspections Under CERCLA (1992 or Latest Edition), Improving Site Assessment: Combined PA/SI Assessments (1999 or Latest Edition). Strict coordination and communication with the COR is required for the success of this project.

The SI will be based on analytical results generated through the use of ITRC’s Incremental Sampling Methodology (ISM) applied to twenty-seven FS identified DUs.

Project Background The Site consists of 10 acres of National Forest System (NFS) land 2.5 miles east of the town of Williamsville, Wayne County Missouri. This Site was an active iron mine between 1908 and 1910, during which approximately 4,000 tons of lump ore were removed. The Site consists of a pond and various prospect pits, waste piles, and trails. To the best of our knowledge, there are no structures, equipment, or underground workings at the Site.

The primary sources of information for the Site are XRF screening data from the Missouri Department of Natural Resources (MoDNR) and a US Department of the Interior Bureau of Mines Report from 1948. The screening data from MoDNR indicates the potential for elevated levels of As in the soil.

Site Access The site is accessible by foot via a ¼ mile skidder trail off MO-49. A site access map that depicts the site location is attached as Attachment E.

Overall Project Schedule:

Site Inspection:

The objectives of the SI sampling are to collect data to determine the presence of and concentrations of COCs in Site soil.

Site Inspection Technical Approach The USFS requires that field sampling activities and analytical methods employed be capable of validly differentiating areas above and/or below the background levels of lead (Pb) and arsenic (As) associated with this geologic area. The soil sampling shall determine whether there’s evidence of a release of Pb and/or As from the Cody/Cady Mine Site through use of ITRC’s Incremental Sampling Methodology (ISM).

The field effort planned is to result in statistically valid and defensible data sufficient to complete the CERCLA Site Inspection. The ability to delineate overall contaminant distribution is critical for subsequent, efficient actions.

The Forest Service has established guideline areas for 27 decision units (DU). Decision units will require field delineation prior to sampling. Minor adjustments to DU’s shown in the SOW are allowed to prevent sampling areas that are difficult to access (dense vegetation, impervious surface, etc…). DU’s should not exceed 20,000 sqft. Boundaries of the DU’s will require identification on a map as part of the final deliverable. A map of the approximate DU areas will be provided by the Forest Service.

ITRC’s ISM soil composite samples of 30 aliquots shall be used within each of the 27 DUs. Additionally, triplicate soil composite samples of 30 aliquots shall be collected at 6 DU’s for a total of 39 composite soil samples containing 30 increments each. The investigator will determine the locations of each of the 30 aliquots to adequately cover the entire area consistent with ISM protocol. The surface duff will be cleared away and the samples will be taken of the surface soils 0-2 inches. Include 1 trip blank if recommended by laboratory. The contractor shall coordinate with the laboratory for appropriate sample containers, sample size, and any preservatives required. The field work is followed by laboratory processing and analysis of the soil samples by using appropriate SW-846 Methods. The laboratory shall have previous experience processing ISM samples and shall be approved by the COR before the field work begins.

The COCs which the samples will be analyzed for include:

1) TAL Metals SW-846 Method 6010D (excluding Mercury and Cyanide) Contractor must remain cognizant of land ownership patterns since USFS will not obtain permission to enter upon non-NFS lands. Field locations of soil samples and Decision Units shall be documented with a GPS receiver to a post-field corrected accuracy of 3 feet.

Site Inspection Project Tasks and Deliverables The SI activity includes developing and implementing soil sampling and analysis for COCs. SI activity also includes analyzing the data and reporting the results along with previous Site information and applicable benchmarks (background concentrations of COC’s and soil screening levels).

Schedule, Line 1, 2, 1A, 2A, 1B, and 2B - Field Sampling Services Field sampling is defined to include: A project phone kickoff meeting including the contractor PM, laboratory PM, and the COR shall take place prior to any onsite work to ensure project coordination. The proposed sample processing SOP’s will be discussed and approved by the COR prior to the start of field work. Meeting will also discuss planned work and timing, obtaining samples as determined in the technical approach section in this scope of work; field documentation; and associated field preparation, mobilization/demobilization, travel, and investigation-derived waste (such as excess soil) handling and disposal.

Field documentation shall include a field description of samples relevant to future data interpretation, location logging, and digital photographs showing relevant sample location characteristics.

Field notes documentation shall include:

· field log, noting field observations of conditions and features;

· basic description of samples;

· Sampling event photos, with description of each photo, including cardinal direction in which the viewer is looking and GPS coordinates of the photo location or field feature location;

· Resource or mapping-grade GPS locations of all sampling locations and significant field features, including photo points and mapping; and

· Chain of custody forms for samples.

Collect data to prepare map(s) of soil sample locations/areas and significant site features, including roads and trails, other features, and delineating non-forested areas. Data should be sufficient to delineate DU’s. However GPS locations of each sample aliquot are not required.

Deliverables – Pre-work conference call, sample collection and field notes, and post-work conference call to summarize the field work. The DUs have been divided into three priority areas as described in Appendix 1 and the Schedule of Items.

Schedule, Lines 3, 4, 3A,4A, 3B, and 4B - Laboratory Analytical Services The USFS requires analytical Methods SW-846 6010 to evaluate COC concentrations. One hundred percent of the laboratory analytical data shall undergo third party EPA Level 3 data validation following relevant, current EPA guidance. Final, validated data shall be included and evaluated in the SI Report.

Contractor and/or analytical laboratory shall be responsible for handling and disposal of any investigation-derived lab waste.

Deliverables - Preliminary unvalidated results, to include draft data spreadsheet (including draft lab data) in format proposed for final report; map of sampled locations,; draft map of photo numbers/locations, and associated spreadsheet with GPS location including elevation, and photo descriptions. These can all be included in the draft SI report.

Spatial data, including spatially-referenced data and geospatial data, should be submitted: (a) in the ESRI File Geodatabase format; and (b) as unprojected geographic coordinates in decimal degree format using North American Datum 1983 (NAD83) as the datum. If applicable, submissions should include the collection method(s). Projected coordinates may optionally be included but must be documented. Spatial data should be accompanied by metadata, and such metadata should be compliant with the Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata and its EPA profile, the EPA Geospatial Metadata Technical Specification. An add-on metadata editor for ESRI software, the EPA Metadata Editor (EME), complies with these FGDC and EPA metadata requirements and is available at https://edg.epa.gov/EME/.

Schedule, Lines 5, 6, 5A, 6A, 5B, and 6B - Site Inspection Report Produce theSite Inspection Report with data presentation, including maps of various soil concentrations as appropriate, specifically including the known Site COCs at a minimum. Report shall include:

· Final versions of prior maps, as appropriate, and discussion;

· Contractor deductions or inferences based on examination of the data and other site-related materials;

· Contractor present all lab results/data with respect to presence of COC’s compared to relevant federal, state or Tribal soil criteria and background;

· MS Excel file that includes DU number, sample analytical results, and 95% UCL of that result. The coefficient of variance (CV) will be calculated for each triplicate. Even though the use of a 30 aliquot composite assists in approaching practical normality, both the Student-t (normal distribution) and Chebyshev (non-parametric) error band will be calculated for each 30 aliquot sample.

· Level 4 Laboratory data package including all raw data and copies of the sample chains of custody.

· Level 3 data validation report (third party).

· GIS layers containing the field-verified locations tied to the corresponding data conforming with USFS requirements as well as approximate boundaries for each DU. Maps and field GPS located photos also shall be referenced to each location or encountered feature.

· Documentation of the methods used, general observations, and lessons learned from the field work.

Deliverables – Draft Report will be submitted within 30 days of receiving the final laboratory data, the Forest Service will review the draft and submit comments to Contractor. Contractor will submit another draft to the Forest Service to ensure comments were addressed. Once the Forest Service accepts the draft report and the revisions, Contractor will submit the Final versions Site Inspection Report and final GIS layers within 14 days of Forest Service acceptance.

Schedule The SI Report will be done as Draft and Final documents. Electronic text submittals shall be in both Word and Adobe Acrobat, analytical results shall be in Excel, and figures and maps shall be in Adobe Acrobat with (ArcGIS) geospatial layers included with the Final Report deliverable. Contractor is encouraged to establish and use an Internet-based file sharing site for electronic submittals.

All electronic versions must be ready for electronic posting and/or printing hard copy documents if needed for public distribution. Electronic versions of the final documents must comply with Section 508 of the Rehabilitation Act of 1973 as amended, to ensure that documents are accessible to people with disabilities and by the visually impaired using assistive technology such as screen readers and refreshable Braille displays. Guidance on Section 508 compliance is available at http://www.section508.gov/.

Base Bid

Option - Additive Alternative 1

Option - Additive Alternative 2

Maps The parcel and decision units outlined are defined as the Cody/Cady Mine site owned by the United States and managed by the Mark Twain National Forest.

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Legend

Decision Units Priority

Cody/ Cady Mine Site Decision Units Mark Twain National Forest image2.jpg