All changes in the contour of the land, grading, excavating,
removal or destruction of the topsoil and removal of trees or other
vegetative cover of the land shall be known as "earth disturbance
activities" and shall comply with the erosion and sedimentation control
standards in this article.
In addition to any NPDES requirements, all earth disturbance
activities shall meet the following requirements:
A. Minimum grading. The maximum bare area of a tract (without stabilization)
shall not exceed 25% of the total area of the tract at any one time.
This requirement shall apply only if the total area of the tract,
before subdivision or land development, is greater than four acres.
B. The maximum time of exposure for bare areas shall be 20 days before
stabilization measures must be implemented.
C. Fording or travel in the beds of perennial streams or intermittent
streams with water by mechanized equipment is not permitted; bridges
or culverts shall be used when crossing streams is necessary.
D. Roads and parking areas in active construction areas shall be completed
(except for wearing course) before building construction is permitted.
The binder course shall be repaired and returned to grade before installing
the wearing course.
E. Temporary erosion control measures may be removed only after the
construction area and contained site is stabilized and the lawn area
established.
F. All newly graded slopes steeper than three to one or over shall be
sodded or stabilized with erosion control netting.
G. A routine end-of-day check shall be made during construction to make
sure that all control measures are working properly. All persons engaged
in land disturbance activities shall design, implement and maintain
control measures which prevent accelerated erosion and sedimentation.
There shall be no adverse discharge of the sediment or other solid
materials from the site as the result of stormwater runoff. This should
be accomplished by scheduling the construction in such a way as to
utilize new plantings and properly installed erosion control measures.
H. All erosion and sedimentation control structures shall be designed,
built and maintained in accordance with the Pennsylvania Erosion and
Sediment Pollution Control Program Manual.