19970893 Ver 3_More Info Received_20070405

q~o8~3 V3
CAROL[NA
8208 Brian Ct.; Garner, NC 27529
ECOSYSTEMS' ~NC. P:919-606-1065-F:919-341-4474
Apri14, 2007
Ms. Amy Chapman
401 Wetlands Unit
NC Division of Water Quality
2321 Crabtree Boulevard
Raleigh, NC 27604
RE: Operation and Maintenance Agreements
Shotwell Construction & Demolition Landfill Expansion
Wake County, North Carolina
Dear Ms. Chapman;
C C~ ~ Q~~ p
~rK 5 2007
t~TLANp3 MAD STOR~NATER BRANCH
As required by the conditions of the Major Variance from the Neuse River Basin: Nutrient
Sensitive Waters Management Strategy: Protection and Maintenance of Existing Riparian
Buffers Rule (15A NCAC 02B .0233) (Rule) for the above referenced project, enclosed are the
signed operation and maintenance (O&M) forms for the proposed best management practices
(BMPs) to be implemented on the site.
The November 2006 variance submittal, subsequently approved by the Environmental
Management Commission in March 2007, included preliminary plans for the landfill expansion
and proposed BMPs. Final design plans will be developed in conjunction with the upcoming
Clean Water Act Section 404/401 permit process. If necessary at that time, revised O&M forms
will be submitted based on the detailed design of the landfill and BMPs.
Please contact me at your convenience if you have any questions or require further information.
Sincerely,
Carolina Ecosystems, Inc.
i
Philip May
Senior Environmental Scientist
Cc: Stacey Smith, P.E., Richardson, Smith, Gardner & Associates, Inc.
David King, Shotwell Landfill, Inc.
Gary Lynch, Shotwell Landfill, Inc.
File

EXTENDED DRY DETENTION BASIN OPERATION AND MAINTENANCE AGREEMENT
PRELIMINARY DOCUMENTATION
The extended dry (dry) detention basin system is defined as the dry detention basin, pretreatment incuding
forebays and the vegetated filter if one is provided.
Maintenance activities shall be performed as follows:
1. After every significant runoff producing rainfall event and at least monthly:
a. Inspect the dry detention basin system for sediment accumulation, erosion, trash accumulation,
vegetated cover, and general condition.
b. Check and clear the or~ce of any obstructions such that drawdown of the temporary pool occurs within
24 hours as designed.
2. Repair eroded areas immediately, re-seed as necessary to maintain good vegetative cover, maw
vegetative cover to maintain a maximum height of six inches, and remove trash as needed.
3. Inspect and repair the collection system (i.e. catch basins, piping, swales, riprap, etc.) quarterly to
maintain proper functioning.
4. Remove accumulated sediment from the dry detention basin system semi-annually or when volume is
reduced to 50°r6 of the original design volume (see Stormwater Plan below). Removed sediment shall be
disposed of in an appropriate manner and shall be handled in a manner that will not adversely impact
water quaf'dy (i.e. stockpiling near a wetland or stream, etc.).
The measuring device used to determine the sediment elevation shall be such that it will give an accurate
depth reading and not readily penetrate into accumulated sediments.
5. If the basin must be drained for an emergency or to perform maintenance, the flushing of sediment
through the emergency drain shall be minim~ed to the maximum extent practical.
6. All components of the dry detention basin system shall be maintained in good working order in
acxordance with the Facility Stormwater Plan as approved by the NCDENR Division of Water Gluality. It is
noted that a preliminary plan (dated November 2006 by G.N. Richardson 8 Associates, Inc.) hats been
issued and will be finalized in conjunction with 401/404 permitting,
7. Level spreaders or other structures that provide diffused flow shall be maintained every six months. All
accumulated sediment and debris shall be removed from the structure, and a level elevation shall be
maintained across the entire flow spreading structure. Any down gradient erosion must be repaired and/or
replanted as necessary.
I acknowledge and agree by my signature halo at I am responsible for the performance of the seven
maintenance procedures listed above. t agr , fo notify DWQ of any pro ms with the syst r~r to any
changes to the system or responsible pa
~~
Print name: Gerry Lynch _
Title: Manager
Address: 4724 S field Road, Wendell, rth Carolina
Phone: [phone] %
Page 1 of 2

Note: The legally responsible party should no# be a homeowners association unless more than 5096 of the
lots have been sold and a resident of the subdivision has been named the president.
1, Q. ~ q 1 ~e ~e 21't- , a Notary Public for the State of N D ~ ~-~ ~ ! ~Yl-a;
County of 0~1 h S~l'~- _ _ , do hereby certify that ~L I'rT ~~ M~
personally appeared before me this 3 day of 1~'~Y~ ~ bb ,and acknowledge the due
execution of the forgoing extended dry detention basin maintenance requirements. Witness my hand and
official seal,
~p1E B. G
a~~~TAR~-~~
Z
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SEAL
My commission expires ~ "' ~'g" ~`O~~a'
Page 2 of 2

LEVEL SPREADER OPERATION AND MAINTENANCE AGREEMENT
The level spreader is defined as an elongated, level threshold, designed to diffuse stormwater runoff.
Maintenance activities shall be performed as follows:
After construction and until vegetation has been established, level spreader(s) shall be inspected
after every rainfall. Thereafter, level spreader(s) shall be inspected at least every month and more
frequently during the fall season and after heavy rainfall events:
a. Accumulated sediment leaves, and trash shall be removed, and repairs made if required.
b. Inspect level spreader(s) for evidence of scour, undercutting, settlement of the stn~cture,
and concentrated flows downhill from the level spreader(s).
c. A level elevation shall be maintained across the entire flow-spreading structure at all times.
Repair or replace the level spreader if it is damaged.
d. Mow vegetative cover to a height of six(6) inches and prune plants if they cover over half
of the level spreader surface.
e. Repair eroded areas and replace/replant dead or damaged vegetation.
Z. The contractor should avoid the placement of any material on and prevent construction tn3ffic
across the structure. If the measure is damaged by construction traffic, it shall be repaired
immediately.
3. Inspect and repair the collection system (e.g., catch basins, pipes, swales, riprap) four (4) times a
yeaz to maintain proper functioning.
I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance
procedures listed above. I agree to notify DWQ of any problems with the system or prior to any changes to
the system or re,~ponsible party.
Print name• (~ Q ! ~` ~ ~.. ~ ~ h
Title: ~ ..,,
Address: ~f 7 %z / ~ •.r.- . ~ ,<~ ,1% ~J~ ~ ~'t .-. ~-1 rv c
Phone• ~ 77~-til~g " 2 >> 9 r
Signature:
Date: c? -v~-
Note: The legally responsible party should not be a homeowners association unless more than 50% of the lots
have been sold and a resident of the subdivision has been named the president.
I, 8 Y hQ- ~ C-rlr~r Z Yl , a Notary Public for the State o ~6 Y~~ GQYoI f h a ,County of
D ri do hereby certify that - L h ~ ~ personally appeared before me this
day of Yi 00~ and ac owledge the due execution of the forgoing wet detention
basin maintenance requirements. Witness my hand and official seal,
~pTARY
otiti A `G z
SEAL
(~,tavL+..ol,(s~ ~~ ~~
My commission expires ~ ' ~' g " ~"0 ~ ~'