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Permit No. VA0088641
Page 20 of 42
milestones implemented for other (i.e., non-Chesapeake Bay) TMDLs when those plans may impact
the physically-interconnected MS4s. The parties are encouraged to cooperate with one another where
the siting or design of BMPs may be accelerated or improved by mutual cooperation.
6) Credit for TMDL Implementation – Permit specific BMP retrofit requirements shall not be double-
counted in the calculation of load reductions. If the permittee undertakes the project, the permittee
shall be entitled to full credit for the project, but may share credit with VDOT on mutually agreeable
terms, which shall be in writing.
7) Illicit Discharge Detection & Elimination – The permittee shall continue to be responsible for
implementing a program for illicit discharge detection and elimination, including dry weather field
screening, for the permittee’s portion of the physically-interconnected MS4. As part of the annual
coordination meeting, described in item (1) above, the permittee shall coordinate with VDOT on the
identification of high risk industrial facilities. The permittee shall establish procedures for notifying
VDOT when an illicit discharge is identified in the VDOT MS4.
8) Water Quality Monitoring – The permittee shall conduct water quality monitoring as required by Part
I.B.2.l) and Part I.C of this state permit. The permittee shall make available to VDOT all monitoring
data collected from areas where the physically-interconnected MS4 discharges to the VDOT MS4 or
received flow from the VDOT MS4. The permittee and VDOT are encouraged to cooperate with one
another to establish a joint monitoring network.
9) Annual Reports – As part of its Annual Report, the permittee shall document any coordination efforts
with VDOT that occurred during the reporting year pursuant to requirements (1) through (7) above.
C. MONITORING REQUIREMENTS
1. In-System/Wet Weather Monitoring
The permittee shall continue to implement an in-system monitoring program to characterize the stormwater
discharged and loading pollutants associated with various land uses. The permittee shall implement a trend
analysis monitoring program of the nutrients and suspended solids in stormwater discharged to the MS4. They
will also identify the predominant sources of nutrient and suspended solids pollutants, including the contaminant
transport pathways and spatial variability of inputs.
a) To be consistent with the previous permit and continue the existing monitoring program, the two (2)
stormwater monitoring sites within the City designated as part of the Hampton Roads Stormwater
Monitoring Network shall continue to be used for monitoring during the term of this permit.
b) To expand on the existing program to conduct a trend analysis, additional samples will be collected on a
fixed monthly interval at a minimum of once per month between January 1st and December 31st at each
monitoring location.
c) For the existing program and for trend analysis, monitoring shall be performed for the following
parameters:
1) Temperature
2) Total Suspended Solids
3) Ammonia as Nitrogen
4) Nitrate plus Nitrite Nitrogen
5) Total Kjeldahl Nitrogen
6) Total Nitrogen (calculated)
7) Orthophosphate
8) Total PhosphorusJump to an indexed page (43 of 43)