Appendix C.7 Hazardous Materials, Pollution Prevention, and Solid Waste

247 Pages·2009·3.09 MB·English

Appendix C.7 Hazardous Materials, Pollution
Prevention, and Solid Waste
Contents
Hazardous Materials and Solid Waste Technical Memorandum
Port Standard Specification for Construction Waste Recycling
C.7-1
HILLSBORO AIRPORT PARALLEL RUNWAY 12L/30R ENVIRONMENTAL ASSESSMENT
APPENDIX C.7

Hazardous Materials and Solid Waste Technical Memorandum

Administrative Draft

Hillsboro Airport
Parallel Runway Project 12L/30R
Hazardous Materials and Solid Waste
Technical Memorandum

Prepared for
Port of Portland

February 2009
Prepared by

Summary
This technical memorandum describes existing conditions, environmental consequences,
and mitigation measures to avoid and minimize impacts of the Hillsboro Airport Parallel
Runway project on hazardous materials and solid waste. The three alternatives currently
being assessed for this project are Alternative 1 - No Action, Alternative 2 - Proposed
Runway 12L/30R with Charlie Helipad Option A, and Alternative 3 - Proposed Runway
12L/30R with Charlie Helipad Option B.
Existing Conditions
Hazardous Materials
The hazardous materials analysis identified sites within the study area that are known to
have hazardous material issues associated with current or historical site activities, including
those with documented releases to the environment. The hazardous materials issues
associated with these sites were assessed to determine the potential of affecting or being
affected by the proposed project.
The primary concerns for hazardous materials are associated with construction, when
subsurface contamination may be encountered as part of construction or post-construction
operations. Cleanup and control of hazardous material contamination during construction
can delay construction and increase project expenses. Operation of the project would also be
a concern if it generated hazardous materials or created a potential for releases to the
environment. The Airport currently uses a variety of hazardous or toxic materials such as
vehicle and aviation fuels and solvents which could be released to the environment as a
result of a spill, airplane crash, or ground support equipment accident. The Port implements
a number of best management practices to address pollution prevention initiatives. These
include maintaining and updating a site specific spill prevention control and
countermeasure plan, stormwater pollution control plan, and properly handling and storing
hazardous materials.
Solid Waste
HIO generates municipal type solid waste and other wastes associated with the operation
and maintenance of general aviation aircraft. The Port of Portland’s waste management
system separates waste streams so that materials that can be recycled are captured and
remaining materials are properly disposed.
Environmental Consequences
Hazardous Materials
The Proposed Action Alternatives for the Hillsboro Airport Parallel Runway 12L/30R
project could affect hazardous materials by either cleaning up contamination encountered in
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HILLSBORO AIRPORT PARALLEL RUNWAY PROJECT 12L/30R HAZARDOUS MATERIALS TECHNICAL MEMORANDUM
the environment or by causing releases to the environment during construction or future
operations.
No contaminated sites of potential concern were identified inside the project footprint. Eight
sites within the area of potential impact outside of the footprint were identified as of
potential concern because of possible contaminants. Construction activities around these
sites could disturb the identified hazardous substances, which in turn could pose a risk to
the environment and human health. No specific environmental impacts were identified
involving the sites of potential concern and their suspected contaminants. However, there is
a possibility of encountering unexpected contaminated media from previously unknown
sites during construction phases of the project. All necessary corrective actions and
reporting requirements would be fulfilled if previously unknown contaminants are
discovered during construction or a spill occurs during construction.
Project operation is not anticipated to generate hazardous or toxic wastes. Through its
pollution prevention program, the Port of Portland continues to examine ways to reduce the
use of potential pollutants at the airfield.
Solid Waste
Various nonhazardous solid wastes would be generated during demolition and
construction of the project. The concrete, asphalt, soil, and other wastes would be
segregated and when possible recycled or reused. For example, clean soil would be used as
fill, if appropriate. Solid waste generation from the construction activities is not anticipated
to exceed 50 cubic yards of material. This estimated volume is well within the capacities of
the local disposal facilities.
The increased Airport traffic forecast for 2012 under all alternatives would result in
increased generation of solid waste from greater numbers of Airport users (pilots and
passengers) as well as increases in onsite employment and in overall operations. However,
the facilities constructed in the Proposed Action Alternatives would not result in a
substantial increase in solid waste generation over that of the No Action Alternative. The
Port of Portland continues to examine ways to reduce waste generation through its waste
management program, which includes waste segregation, recycling, and energy recapture.
The project’s impacts on HIO’s solid wastes and solid waste management program are
expected to be negligible.
Mitigation and Measures to Avoid and Minimize Impacts
No significant impacts related to hazardous materials or solid waste were identified for
Alternatives 2 and 3; therefore no mitigation is required.
Best management practices (BMPs) would be used to avoid and minimize impacts during
construction and operation of the proposed project. Potential BMPs include but may not be
limited to creating a contaminated media management plan, implementing stormwater
management and erosion control measures, and ensuring staff and work crews are properly
trained.
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HILLSBORO AIRPORT PARALLEL RUNWAY PROJECT 12L/30R HAZARDOUS MATERIALS TECHNICAL MEMORANDUM
Contents
Page
Summary ............................................................................................................................................ iii
Existing Conditions ............................................................................................................... iii
Hazardous Materials ................................................................................................ iii
Solid Waste ................................................................................................................ iii
Environmental Consequences ............................................................................................. iii
Hazardous Materials ................................................................................................ iii
Solid Waste ................................................................................................................ iv
Mitigation and Measures to Avoid and Minimize Impacts ............................................ iv
Hazardous Materials and Solid Waste ........................................................................................... 1
1. Regulatory Setting, Background, and Methodology .................................................... 1
1.1 Regulatory Setting ................................................................................................ 1
1.2 Background ........................................................................................................... 2
1.3 Methodology ......................................................................................................... 2
2. Existing Conditions ........................................................................................................... 5
2.1 Study Area ............................................................................................................. 5
2.2 Current Conditions in the Study Area .............................................................. 5
3. Environmental Consequences ....................................................................................... 10
3.1 Alternative 1 - No Action .................................................................................. 10
3.2 Alternative 2 - Proposed Runway 12L/30R with Charlie Helipad
Option A .................................................................................................................. 12
3.3 Alternative 3 - Proposed Runway 12L/30R with Charlie Helipad
Option B ................................................................................................................... 14
3.4 Cumulative Impacts ........................................................................................... 14
4. Mitigation and Measures to Avoid and Minimize Impacts ...................................... 14
5. References ......................................................................................................................... 15
Acronyms and Abbreviations ........................................................................................................ 17

Exhibits
1 Features of Potential Concern
2 Key to Exhibit 1, Features of Potential Concern
3 Summary of Waste Streams at the Hillsboro Airfield
4 Projected Annual Waste Streams for the Year 2012
Attachments
A Fate and Transport
B Environmental Data Report
C Historic Aerial Photos
D Certified Sanborn® Map Report
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HILLSBORO AIRPORT PARALLEL RUNWAY PROJECT 12L/30R HAZARDOUS MATERIALS TECHNICAL MEMORANDUM