Maryland Code § EN-9-323.1

Section EN-9-323.1
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(a) Except as provided in subsection (c) of this section and for a construction
site with a total proposed disturbed area of 5 acres or more, the Department may not
authorize the discharge of stormwater associated with construction activity under a
general discharge permit until the requirements under subsection (b) of this section
are satisfied if any portion of the area of disturbance is located in:
(1) A watershed or catchment that drains to a receiving water
designated as high quality under Department regulations;
(2) The Critical Area Buffer; or
(3) An area identified by the Federal Emergency Management
Agency as having a 1% chance of annual flooding.
(b) (1) Subject to paragraph (2) of this subsection, if the Department
receives a written request within the public notification period of the general
discharge permit, the Department shall extend the public notice period to 60 days to
provide the requestor an opportunity to comment on the potential impact of
inadequate construction site controls on waters of the State.
(2) The Department shall promptly:
(i) Acknowledge receipt of the written request;
(ii) Notify the applicant for the general discharge permit of the
written request and include details regarding potential inadequacies of proposed
construction site controls;
(iii) Request an electronic copy of the approved sediment
control plan from the applicant and provide a copy to the requestor; and
(iv) Notify the applicant if any updates to the sediment control
plan are required prior to final authorization of the general discharge permit.
(c) This section does not apply to construction activity that:
(1) Does not result in the establishment of any permanent
residential, commercial, or industrial building; and

(2) Is solely intended to restore natural resources, reduce water
pollution, or improve water quality.

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