PORT NOTE: This is a modified version of FAA Item P-156. At the end of this section are Construction Modifications
denoting Port-specific changes. FAA and Port editing notes follow the text to which they refer.
For review: Use track changes when editing text. Turn off track changes when deleting FAA and Port editor’s notes. Cut and
paste Construction Modifications to Engineer’s Design Report. Turn track changes back on and submit review documents in
electronic and in hard copy to the Port with design edits showing.
For advertisement: Accept all changes. Submit to the Port in electronic and in hard copy.
ITEM P-156 TEMPORARY AIR AND WATER POLLUTION, SOIL EROSION, AND SILTATION CONTROL
PORT NOTE: This item has been customized to meet the requirements of Port Environmental Affairs. Edit Sections 2.1 through
2.6 and other sections with notes as applicable to the project, but leave remaining sections unaltered unless approved otherwise
by Port Environmental Affairs.
DESCRIPTION
156-1.1 This item shall consist of temporary control measures and monitoring to control water pollution, soil
erosion, and siltation until final completion of the work. Erosion control devices and/or methods include the use of
berms, dikes, dams, sediment basins, fiber mats, gravel, mulches, silt fences, grasses, slope drains, and other
techniques. This item also describes techniques to monitor effectiveness of the temporary control methods.
The temporary erosion control measures contained herein shall be developed to the extent practical to assure
economical, effective, and continuous erosion control throughout the construction period.
Temporary control may include work outside the construction limits such as borrow pit operations, equipment and
material storage sites, waste areas, and temporary plant sites.
156-1.2 PERMITS. The Port is administrator of the NPDES General Permit 1200-CA for the Discharge of
Construction Site Runoff to Public Waters on projects performed by or for the Port on Port property. A copy of the
permit and its regulations are on file at the Port’s Engineering offices. The law mandates that the Port and its agents
comply with these regulations. The Contractor shall comply with the requirements of the permit as noted in these
specifications. These specifications are intended to serve as a supplement to the general permit language.
156-1.3 SUBMITTALS. At the pre-construction meeting, submit the following information in order to supplement
the Port’s Erosion, Sediment, and Pollutant Control (ESPC) measures shown on the plans:
a.
Construction start and completion dates.
b.
Dates when ESPC measures will be in place.
c.
Projected date of removal of erosion control structures, i.e., silt fence (after soil is stabilized by
vegetation).
d.
Description of control procedures to prevent the discharge of all wash water from concrete trucks into
the storm and surface water system.
e.
Description of procedures for prompt maintenance or repair of ESPC measures utilized on-site.
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P-156-1
f.
Description of clearing and grading practices, including a schedule of implementation, that will
minimize the area of exposed soil throughout the duration of the project. (Whenever practicable,
clearing and grading shall be phased to prevent exposed inactive areas from becoming a source of
erosion.)
g.
Description of best management practices that will be used to prevent or minimize storm water from
being exposed to pollutants from spills, cleaning and maintenance activities, and waste handling
activities. These pollutants include fuel, hydraulic fluid, and other oils from vehicles and machinery
as well as debris, leftover paints, solvents, and glues from construction operations.
h.
Name, title, and telephone number of designated employee to perform the Contractor’s inspection and
monitoring of ESPC measures.
Any requested changes or modifications to the ESPC measures shown on the plans shall be submitted to the Port for
approval prior to implementation. Upon request by the Port, the Contractor shall submit updated ESPC drawings
which include the latest modifications. ESPC inspection records shall be submitted with the Contractor’s monthly
request for payment.
MATERIALS
156-2.1 GRASS. The species and application rates of grass seed furnished shall conform to Item T-901, Seeding.
156-2.2 MULCHES. Mulches may be grass straw, fiber mats, bonded fiber matrix, or other suitable material
which conforms to Item T-901, Seeding.
156-2.3 FERTILIZER. Conform to Item T-901, Seeding.
156-2.4 SLOPE DRAINS. Not used.
156-2.5 OTHER. All other materials shall meet commercial grade standards and shall be approved by the Port
before being incorporated into the project.
156-2.6 INLET PROTECTION. Inlet protection shall be installed as shown on the drawings.
156-2.7 DITCH PROTECTION. Ditch protection shall be installed as shown on the drawings, or as directed by
the Port.
156-2.8 JET BLAST CONTROL MATERIAL. A hydraulically applied bonded fiber matrix material which
conforms to Item P-152, Excavation and Embankment.
CONSTRUCTION METHODS
156-3.1 GENERAL. The implementation of ESPC measures and construction performance monitoring
maintenance, replacement, and upgrading of ESPC measures are the Contractor’s responsibility until all construction
is completed and accepted and vegetation is established.
TEMP. POLLUTION, SOIL EROSION, & SILTATION CONTROL
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Some states, municipalities, and pollution control authorities have very specific regulations
for air and water pollution controls. These may include requirements for:
Use of smoke density charts.
Measurement of weight and density (micrograms per cubic meter of air) of suspended
particulate.
Permissible weights of emission in pounds per hour (kilograms per hour) versus pounds per
hour (kilograms per hour) of material processed.
Open burning.
Erosion control measures.
*********************************************************
Several methods of controlling dust and other air pollutants include:
Exposing the minimum area of erodible earth.
Applying temporary mulch with or without seeding.
Using water sprinkler trucks.
Using covered haul trucks.
Using dust palliatives or penetration asphalt on haul roads.
Using plastic sheet coverings.
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The ESPC measures shown on the plans shall be constructed in conjunction with all clearing, grading, trenching,
borrow, stockpile, and other earthwork activities and in a manner that ensures that sediment and sediment-laden
water do not enter the drainage system, roadways, or violate applicable water quality standards.
The ESPC measures shown on the plans are the minimum requirements for anticipated site conditions and
Contractor methods and sequences. During the construction period, the ESPC measures shall be upgraded as needed
for unexpected conditions, storm events, or Contractor methods or sequences and to ensure that sediment and
sediment-laden water do not leave the site.
The Contractor shall be responsible for implementing temporary ESPC measures during construction to correct
unforeseen conditions. The Contractor shall be responsible for additional erosion control due to the Contractor’s
negligence, carelessness, or failure to install planned controls as a part of the work.
Implementation, construction, and maintenance of ESPC measures shall be in accordance with the [City of Portland
Erosion Control Manual] [Cleanwater Services Erosion Prevention and Sediment Control Planning and Design
Manual]. Do not begin soil disturbance activities until all ESPC measures are in place.
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P-156-3
Schedule and perform ground disturbance activities in order to minimize impact to the overall project.
PORT NOTE: Use Cleanwater Services option if work is in Hillsboro; otherwise use City of Portland option.
The erosion control drawings together with the supplemental ESPC information constitute the ESPC plan. A copy
of the ESPC plan shall be retained on site and made available to the Port upon request.
156-3.2 SCHEDULE. Conform to Section 013200, Construction Progress Documentation.
PORT NOTE: If Section 013200 is not included, delete text and replace with, “Not used.”
156-3.3 AUTHORITY OF THE PORT. The Port has the authority to limit the surface area of erodible earth
material exposed by clearing and grubbing, to limit the surface area of erodible earth material exposed by
excavation, borrow and fill, or embankment operations. The Port also has the authority to direct the Contractor to
provide immediate permanent or temporary pollution control measures to prevent contamination of adjacent streams
or other watercourses, lakes, ponds, or other areas of water impoundment.
156-3.4 CONSTRUCTION DETAILS. No visible or measurable erosion material or pollutant shall exit the
construction site. Visible or measurable is defined as:
a.
Deposits of mud, dirt, sediment or similar material exceeding 1/2 cubic foot in volume in any area of
100 square feet or less on public or private streets, adjacent property, or into the storm or surface water system,
either by direct deposit, dripping, discharge, or as a result of the action of erosion.
b. Evidence of concentrated flows of water over bare soils; turbid or sediment laden flows; or evidence
of on-site erosion such as rivulets on bare soil slopes, where the flow of water is not filtered or captured on the site.
c.
Mud flows or earth slides, sloughing, or other earth movement that leaves the property.
Employ all reasonable means and methods to control or divert upslope stormwater runoff away from cleared and
grubbed areas, stockpiled materials, borrow sites, and other disturbed areas that will be open or stockpiled for
periods longer than 2 weeks.
Construction entrances, exits, and parking areas shall be graveled or paved to reduce the tracking of sediment onto
public or private roads. Maintain for the duration of the project. Unpaved roads on the site shall be graveled or
under other effective erosion and sediment control measures, either on the road or down gradient, to prevent
sediment and sediment-laden water from leaving the site.
Preserve existing vegetation where practicable and reseed and mulch open areas as soon after grading or
construction as allowed.
Continuously secure or protect soil stockpiles and borrow sites from runoff and erosion throughout the project with
temporary soil stabilization measures or protective cover.
Maintain and install sediment controls on all down gradient sides of the construction site for the duration of the
work.
PORT NOTE: Retain preceding paragraph for Hillsboro projects only.
TEMP. POLLUTION, SOIL EROSION, & SILTATION CONTROL
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Provide any necessary ongoing maintenance, repair, and restoration of ESPC measures to keep them continually
functional. The following maintenance activities shall be included:
a.
Visual or measurable amounts of sediment and pollutants that leave the site shall be cleaned up
immediately and placed back on the site or properly disposed. Under no conditions shall sediment be intentionally
washed into storm sewers or drainage ways.
b.
Clean catch basin protection when design capacity has been reduced by 50 percent.
c.
Remove sediment trapped by sediment fences before it reaches one third (1/3) of the above ground
fence height.
d.
Remove trapped sediments from sediment basins when design capacity has been reduced by 50
percent.
Use an approved jet blast control material (with seed) when excavation and/or grading areas are to be returned to
aircraft traffic or when directed by the Port. Apply at the rate of 3,000 pounds per acre to areas shown on the
erosion control plans or as directed by the Port.
If construction activities cease for 30 days or more, the entire site shall be stabilized using vegetation or a heavy
mulch layer, temporary seeding, or another method that does not require germination to control erosion.
PORT NOTE: Use preceding paragraph for all locations except Hillsboro.
If construction activities cease for 15 days or more on any significant portion of the work site, that portion of the site
shall be stabilized using straw, compost, or other tackified covering that prevents soil and wind erosion.
PORT NOTE: Use preceding paragraph for Hillsboro only.
Any use of toxic or other hazardous materials shall include proper storage, application, and disposal.
When trucking saturated soils from the site, either watertight trucks shall be utilized or loads shall be drained on-site
until dripping has been reduced to minimize spillage on roads and streets.
Clean all catch basins and inlets protected from sediment prior to final acceptance. The cleaning operation shall not
flush sediment laden water into the downstream system.
ESPC measures installed during construction shall be removed after all construction and site disturbance activities
are complete and permanent soil stabilization is in place.
PORT NOTE: Edit preceding paragraph as appropriate for the project.
Remove and dispose of waste material according to Disposal article in Section 015000, Temporary Facilities and
Controls.
The Port will obtain DEQ approval for any treatment system or operational plan used to treat contaminated
construction dewatering.
PORT NOTE: Retain preceding paragraph for Hillsboro only.
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156-3.5 TEMPORARY STABILIZATION DURING WET WEATHER PERIODS. All exposed soils shall be
covered during the wet weather periods. The Contractor shall use temporary stabilization methods at the end of each
work day if rainfall is forecasted in the next 24 hours.
PORT NOTE: Retain preceding paragraph for Hillsboro only.
156-3.6 MONITORING AND REPORTING REQUIREMENTS. An employee with knowledge and experience
in construction storm water controls and management practices shall be designated by the Contractor to perform
inspections of ESPC measures. Inspect erosion control measures daily and maintain as necessary to ensure their
continued functioning. For inactive periods of work, inspect ESPC measures at least once every 14 days and within
24 hours after any storm with precipitation greater than 0.5 inches per 24-hour period.
Visibly monitor storm water runoff to evaluate the effectiveness of the erosion control measures or practices. If
visible quantities of sediment are leaving the property, take corrective action immediately. Notify the Port of all
corrections and violations.
The Contractor shall keep a record of inspections. This record shall be available to the Port upon request and shall
be submitted with each request for payment. Visual inspections shall document the following information:
a.
Inspection date, inspector’s name, weather conditions, and rainfall amount for the past 24 hours (in
inches). (Rainfall information can be obtained from the nearest weather recording station.)
b. List observations of: Erosion and sediment controls, chemical and waste controls, locations where
vehicles enter and exit site, status of areas that employ temporary or final stabilization control, soil stockpile area,
and non storm water controls.
c.
At representative discharge location(s) from the construction site, conduct observation and document
the quality of the discharge for any turbidity, color, sheen, or floating materials. If possible, in the receiving stream,
observe and record color and turbidity or clarity upstream and downstream within 30 feet of the discharge from the
site. For example, a sheen or other types of floating material shall be noted as present/absent. If present, it may
indicate possible spill or leakage from vehicles or materials storage. Observation for turbidity and color shall
describe any apparent color, the clarity of the discharge, and apparent differences compared with the receiving
stream.
d. If visual or measurable amounts of sediment are leaving the property, briefly explain the corrective
measures taken to reduce the discharge and/or clean it up. Describe efforts to prevent future releases. The ESPC
shall be amended accordingly.
e.
If a site is inaccessible due to inclement weather, the inspection shall include observations at a
relevant discharge point or downstream location, if practical.
METHOD OF MEASUREMENT
PORT NOTE: Payment can be broken into a per-item cost per Port approval. See FAA AC 150/5370.
156-4.1 TEMPORARY EROSION CONTROL. Temporary erosion control will not be measured.
TEMP. POLLUTION, SOIL EROSION, & SILTATION CONTROL
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BASIS OF PAYMENT
156-5.1 TEMPORARY EROSION CONTROL. Payment will be made at the contract lump sum price for all
temporary erosion control necessary. This price shall be full compensation for furnishing all materials, labor,
equipment, and tools necessary to complete the item.
END OF ITEM P-156
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CONSTRUCTION MODIFICATIONS
Modification:
Revised item to comply with the requirements of the Port’s National Pollutant
Discharge Elimination System (NPDES) General Permit 1200CA.
Justification:
The Port is administrator of a NPDES General Permit 1200CA (Discharge of
Construction Site Runoff to Public Waters) on projects performed by or for the
Port on Port property. The Port and its agents are mandated, by law, to comply
with the applicable requirements of this permit. Because of this, the item needed
to be rewritten in a form consistent with permit language.
TEMP. POLLUTION, SOIL EROSION, & SILTATION CONTROL
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