Agenda

Standard Operating Procedure for:

A.1 IDDE: Inspections During Mapping

Purpose of SOP:

inspections during mapping.

This SOP provides a basic checklist for managers and field crews conducting illicit discharge

Always:

@ Characterize the outfall by recording information on the Storm

Drain Characteristic Form.

4 Conduct inspections during dry weather periods using the Dry

Weather Outfall Inspection Form.

4 Follow procedure below if an illicit discharge is encountered

TABLE 2-1:
LAND USES, LIKELY SOURCE LOCATIONS AND ACTIVITIES THAT CAN PRODUCE TRANSITORY OR INTERMITTENT ILLICIT
DISCHARGES
Land Use Likely Source Locations Condition or Activity that Produces Discharge
Residential @ Apartments @ Driveway cleaning
$ Multi-family # Dumping/spills (e.g., leaf litter and RV/boat holding tank
@ Single family detached effluent)
¢@ Equipment/vehicle wash-downs
@ Septic system maintenance
@ Swimming pool discharges
Commercial @ Campgrounds/RV parks @ Building maintenance (power washing)

35

Northeast
Regional Mercury
TMDL

Spit Brook NHRIV700061206-16 Mercury (4A-M) Northeast
Regional Mercury
TMDL

Merrimack River NHRIV700061206-24 Chlorophyll-a (5-M), E. Coli New Hampshire
(4A-M), Aluminum (5-M), Statewide

pH (5-M), Mercury (4A-M) Bacteria TMDL,
Northeast
Regional Mercury
TMDL

Unnamed Brook NHRIV700061206-28 Mercury (4A-M) Northeast
Regional Mercury
TMDL

34

03

Regional Mercury
TMDL

Lovewell Pond

NHLAK700061201-01

Mercury (4A-M)

Northeast
Regional Mercury
TMDL

Lyle Reed Brook

NHRIV700040402-04

Mercury (4A-M)

Northeast
Regional Mercury
TMDL

Unnamed Brook to
Nashua River

NHRIV700040402-07

Mercury (4A-M)

Northeast

Regional Mercury
TMDL

Nashua River

NHRIV700040402-08

E. Coli (4A-P), Non-native
aquatic plants (4C-P),
Mercury (4A-M)

LIST OF IMPAIRED WATERS

Nashua, New Hampshire

33

Impairment(s) and Associated
Water Body Name Segment ID Category Approved TMDL
Nashua River — Mine Falls |» NHIMP700040402-02 Dissolved oxygen saturation | Northeast

Dam Pond

(5-P), pH (5-M), Non-native
aquatic plants (4C-M),
Mercury (4A-M),
Cyanobacteria hepatotoxic
microcystins (5-M)

Regional Mercury
TMDL

Nashua River — Nashua
Canal Dike

NHIMP700040402-03

32

Appendix B

list of mpaied Waters
Storm System Mapping

Nashua has completed all mapping associated with Phase I and the majority of the mapping associated
with Phase II. The information is readily available via the following website:

https://www.nashuanh.gov/155/GIS-Maps

§ 190-217 § 190-218

of noncompliance with site plan approval, subject to
enforcement as outlined under § 190-157.

(2) The owner shall ensure that an annual report is provided to
the Planning Department on or before the first day of January
of each year. Such reports shall, at a minimum, include:
[Amended 6-26-2018 by Ord, No. O-18-015]

(a) The location of the property;
(b) The name, address, and phone number of the owner;

§ 190-217 § 190-217

which provide that the obligations of the maintenance plan
Tun with the land. [Amended 6-26-2018 by Ord. No.
O-18-015]

(2) The owner shall file with the registry of deeds such legal
instruments as are necessary to allow the City or its designee
to inspect or maintain the stormwater management systems
for compliance with the O&M plan.

§ 190-215 § 190-217

K. Litter, debris, yard waste, and all other nonstormwater
discharges except for those listed in Subsection J above are
prohibited. [Added 6-26-2018 by Ord. No. O-18-015]

§ 190-216. Easements.

Where a subdivision is traversed by or requires the construction of a
watercourse or a drainage way, an easement of adequate width shall
be provided for such purpose.

§ 190-217. Operation and maintenance plans.

§ 190-215 § 190-215

to the MS4. If these discharges are identified as significant
contributors to the MS4, they must be addressed in the illicit
discharge detection and elimination minimum contro] measure
described. [Added 6-26-2018 by Ord. No. O-18-015]

(1) Water line flushing;
(2) Landscape irrigation;
(3) Diverted stream flows;
(4) Rising groundwaters;

(5) Uncontaminated groundwater infiltration [as defined at 40
CFR 35.2005(20)];

(6) Uncontaminated pumped groundwater;