SW5190701_Form_(O&M)_20190826

Operation & Maintenance Agreement
Project Name:
Project Location:
Siler School Square
Siler City, NC
Cover Page
Maintenance records shall be kept on the following BMP(s). This maintenance record shall be kept in a log in a known set location.
Any deficient BMP elements noted in the inspection will be corrected, repaired, or replaced i nrnediateiy. These deficiencies can
affect the integrity of structures, safety of the public, and the pollutant removal efficiency of the BMP(s).
The BMP(s) on this project include (check all that apply & co
Bioretention Cell
Quantity:
Dry Detention Basin
Quantity:
Grassed Swale
Quantity:
Green Roof
Quantity:
Infiltration Basin
Quantity:
Infiltration Trench
Quantity:
Level SpreaderNFS
Quantity:
Permeable Pavement
Quantity:
Proprietary System
Quantity:
Rainwater Harvesting
Quantity:
Sand Filter
Quantity:
Stormwater Wetland
Quantity:
Wet Detention Basin
Quantity:
Disconnected Impervious Area
Present:
User Defined BMP
Present:
ig u&m taoies win
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
Location(s):
I acknowledge and agree by my signature below that I am responsible for the performance of the maintenance procedures listed for
each BMP above, and attached O&M tables. I agree to notify NCDENR of any problems with the system or prior to any changes to
the system or responsible parry.
* Responsible Party: Richard Angino
Title & Organization: After School, LLC
Street address: 463 112 Carolina Circle
City, state, zip: Winston Salem, NC 27104
Phone number(s): 336-499-1963
Email: [e-mail]
Signature:'. I Date: q'Zo`9
I, VI/ t Sort 9. &rtj-^ a Notary Public for the State of NeAlk
County of ` do hearby certify that personally appeared before me this �L� day of y,tt 20 \5 and
acknowledge the due execution of the Operat' ns and Maintenance Agreement .
Witness my hand and official seal, 01&�
Forsyth County, N rth Carolina
Notary P lic
VVilson D. rren
f�'v Commission Expir 11/312023
Seal My commission expires I I' z) 'Z013
Proprietary System Maintenance Requirements
How many devices are
Contech StormFilters?
ST RM-EZ ATTACH MANUFACTURER'S MAINTENANCE MANUAL FOR ALL PROPRIETARY DEVICES 8/14/2019
Version 1.4 O&M Manu—a-F----
Page 1 of 1

Proprietary System Maintenance Requirements
How many devices are
Contech StormFilters?
ATTACH MANUFACTURER'S MAINTENANCE MANUAL FOR ALL PROPRIETARY DEVICES
STORM-EZ 7/10/2019
Version 1.4 O&M Manual Page 3 of 3

Filterra Owner's Manual
f i [teffa�
Bioretention Systems
C% NTECH®
ENGINEERED SOLUTIONS

i
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Bioretention Systems
Table of Contents
Introduction................................................................................4
Activation Overview.....................................................................4
Filterra Plant Selection Overview...................................................6
Warranty Overview......................................................................6
Routine Maintenance Guidelines...................................................6
Maintenance Visit Procedure.........................................................9
Appendix 1 —Activation Checklist...............................................12
Appendix 2 — Planting Requirements for Filterra Systems................13
Enclosed
Local Area Filterra Plant List
C% NTECH®
ENGINEERED SOLUTIONS
www.ContechES.com/filterra 1800-338-1122 3

Introduction
Thank you for your purchase of the Filterra"' Bioretention System. Filterra is a specially engineered stormwater treatment system
incorporating high performance biofiltration media to remove pollutants from stormwater runoff. The system's biota (vegetation
and soil microorganisms) then further breakdown and absorb captured pollutants. All components of the system work together
to provide a sustainable long-term solution for treating stormwater runoff.
The Filterra system has been delivered to you with protection in place to resist intrusion of construction related sediment which
can contaminate the biofiltration media and result in inadequate system performance. These protection devices are intended
as a best practice and cannot fully prevent contamination. It is the purchaser's responsibility to provide adequate measures to
prevent construction related runoff from entering the Filterra system.
Included with your purchase is Activation of the Filterra system by the manufacturer as well as a 1-year warranty from delivery
of the system and 1-year of routine maintenance (mulch replacement, debris removal, and pruning of vegetation) up to twice
during the first year after activation.
Design and Installation
Each project presents different scopes for the use of Filterra systems. Information and help may be provided to the design
engineer during the planning process. Correct Filterra box sizing (by rainfall region) is essential to predict pollutant removal
rates for a given area. The engineer shall submit calculations for approval by the local jurisdiction. The contractor is
responsible for the correct installation of Filterra units as shown in approved plans. A comprehensive installation manual is
available at www.ContechES.com.
Activation Overview
Activation of the Filterra system is a procedure completed by the manufacturer to place the system into working condition. This
involves the following items:
Removal of construction runoff protection devices
Planting of the system's vegetation
Placement of pretreatment mulch layer using mulch certified for use in Filterra systems.
Activation MUST be provided by the manufacturer to ensure proper site conditions are met for Activation, proper installation of
the vegetation, and use of pretreatment mulch certified for use in Filterra systems.
www.ContechES.com/filterra 1800-338-1122

Minimum Requirements
The minimum requirements for Filterra Activation are as follows:
1 .The site landscaping must be fully stabilized, i.e. full landscaping installed and some grass cover (not just straw and seed) is
required to reduce sediment transport. Construction debris and materials should be removed from surrounding area.
2.Final paving must be completed. Final paving ensures that paving materials will not enter and contaminate the Filterra system
during the paving process, and that the plant will receive runoff from the drainage area, assisting with plant survival for the
Filterra system.
3.Filterra throat opening should be at least 4" in order to ensure adequate capacity for inflow and debris.
0'- 4" MIN CLEAR
THROAT OPENING
1 .4
CAST -IN -PLACE GUTTER AND THROAT " .. THROAT PROTECTION DEVICE
OPENING (BY CONTRACTOR PER
DO NOT REMOVE - LEAVE IN PLACE
LOCAL STANDARDS) UNTIL SITE IS STABILIZED AND
FILTERRA IS ACTIVATED
d
An Activation Checklist is included on page 12 to ensure proper conditions are met for Contech to perform the Activation
services. A charge of $500.00 will be invoiced for each Activation visit requested by Customer where Contech determines that the
site does not meet the conditions required for Activation.
www.ContechES.com/filterra 1800-338-1122 5

Filterra Plant Selection Overview
A Plant List has been enclosed with this packet highlighting recommended plants for Filterra systems in your area. Keep in mind
that plants are subject to availability due to seasonality and required minimum size for the Filterra system. Plants installed in the
Filterra system are container plants (max 15 gallon) from nursery stock and will be immature in height and spread at Activation.
It is the responsibility of the owner to provide adequate irrigation when necessary to the plant of the Filterra system.
The "Planting Requirements for Filterra Systems" document is included as an appendix and discusses proper selection and care of
the plants within Filterra systems.
Warranty Overview
Refer to the Contech Engineered Solutions LLC Stormwater Treatment System LIMITED WARRANTY for further information. The
following conditions may void the Filterra system's warranty and waive the manufacturer provided Activation and Maintenance
services:
• Unauthorized activation or performance of any of the items listed in the activation overview
• Any tampering, modifications or damage to the Filterra system or runoff protection devices
• Removal of any Filterra system components
• Failure to prevent construction related runoff from entering the Filterra system
• Failure to properly store and protect any Filterra components (including media and underdrain stone) that may be shipped
separately from the vault
Routine Maintenance Guidelines
With proper routine maintenance, the biofiltration media within the Filterra system should last as long as traditional bioretention
media. Routine maintenance is included by the manufacturer on all Filterra systems for the first year after activation. This includes
a maximum of 2 visits to remove debris, replace pretreatment mulch, and prune the vegetation. More information is provided in
the Operations and Maintenance Guidelines. Some Filterra systems also contain pretreatment or outlet bays. Depending on site
pollutant loading, these bays may require periodic removal of debris, however this is not included in the first year of maintenance,
and would likely not be required within the first year of operation.
These services, as well as routine maintenance outside of the included first year, can be provided by certified maintenance
providers listed on the Contech website. Training can also be provided to other stormwater maintenance or landscape providers.
www.ContechES.com/filterra 1800-338-1122

Why Maintain?
All stormwater treatment systems require maintenance for effective operation. This necessity is often incorporated in your
property's permitting process as a legally binding BMP maintenance agreement. Other reasons to maintain are:
• Avoiding legal challenges from your jurisdiction's maintenance enforcement program.
• Prolonging the expected lifespan of your Filterra media.
• Avoiding more costly media replacement.
• Helping reduce pollutant loads leaving your property.
Simple maintenance of the Filterra is required to continue effective pollutant removal from stormwater runoff before discharge into
downstream waters. This procedure will also extend the longevity of the living biofilter system. The unit will recycle and accumulate
pollutants within the biomass, but is also subjected to other materials entering the inlet. This may include trash, silt and leaves
etc. which will be contained above the mulch layer. Too much silt may inhibit the Filterra's flow rate, which is the reason for site
stabilization before activation. Regular replacement of the mulch stops accumulation of such sediment.
When to Maintain?
Contech includes a 1-year maintenance plan with each system purchase. Annual included maintenance consists of a maximum
of two (2) scheduled visits. Additional maintenance may be necessary depending on sediment and trash loading (by Owner or at
additional cost). The start of the maintenance plan begins when the system is activated.
Maintenance visits are scheduled seasonally; the spring visit aims to clean up after winter loads including salts and sands while
the fall visit helps the system by removing excessive leaf litter.
It has been found that in regions which receive between 30-50 inches of annual rainfall, (2) two visits are generally required;
regions with less rainfall often only require (1) one visit per annum. Varying land uses can affect maintenance frequency;
e.g. some fast food restaurants require more frequent trash removal. Contributing drainage areas which are subject to new
development wherein the recommended erosion and sediment control measures have not been implemented may require
additional maintenance visits.
Some sites may be subjected to extreme sediment or trash loads, requiring more frequent maintenance visits. This is the reason for
detailed notes of maintenance actions per unit, helping the Supplier and Owner predict future maintenance frequencies, reflecting
individual site conditions.
Owners must promptly notify the (maintenance) Supplier of any damage to the plant(s), which constitute(s) an integral part of the
bioretention technology. Owners should also advise other landscape or maintenance contractors to leave all maintenance to the
Supplier (i.e. no pruning or fertilizing) during the first year.
www.ContechES.com/filterra 1800-338-1122

Exclusion of Services
Clean up due to major contamination such as oils, chemicals, toxic spills, etc. will result in additional costs and are not covered
under the Supplier maintenance contract. Should a major contamination event occur the Owner must block off the outlet pipe of
the Filterra (where the cleaned runoff drains to, such as drop inlet) and block off the throat of the Filterra. The Supplier should be
informed immediately.
Maintenance Visit Summary
Each maintenance visit consists of the following simple tasks (detailed instructions below).
1 . Inspection of Filterra and surrounding area
2. Removal of tree grate and erosion control stones
3. Removal of debris, trash and mulch
4. Mulch replacement
5. Plant health evaluation and pruning or replacement as necessary
6. Clean area around Filterra
7. Complete paperwork
Maintenance Tools, Safety Equipment and Supplies
Ideal tools include: camera, bucket, shovel, broom, pruners, hoe/rake, and tape measure. Appropriate Personal Protective
Equipment (PPE) should be used in accordance with local or company procedures. This may include impervious gloves where the
type of trash is unknown, high visibility clothing and barricades when working in close proximity to traffic and also safety hats and
shoes. A T-Bar or crowbar should be used for moving the tree grates (up to 170 Ibs ea.). Most visits require minor trash removal
and a full replacement of mulch. See below for actual number of bagged mulch that is required in each media bay size. Mulch
should be a double shredded, hardwood variety. Some visits may require additional Filterra engineered soil media available from
the Supplier.
Box Length
Box Width
Filter Surface
Area (ft2)
Volume at 3" (ft3)
# of 2 ft3 Mulch
Bags
1
•
www.ContechES.com/filterra 1800-338-1122

Maintenance Visit Procedure
Keep sufficient documentation of maintenance actions to predict location specific maintenance frequencies and needs. An
example Maintenance Report is included in this manual.
1. Inspection of Filterra and surrounding area
• Record individual unit before maintenance with photograph (numbered).
Record on Maintenance Report (see example in this document) the following:
Record on Maintenance Report the following:
Standing Water yes no
Damage to Box Structure yes no
Damage to Grate yes no
Is Bypass Clear yes no
If yes answered to any of these observations, record with
close-up photograph (numbered).
2. Removal of tree grate and erosion control stones
• Remove cast iron grates for access into Filterra box.
• Dig out silt (if any) and mulch and remove trash & foreign items.
3. Removal of debris, trash and mulch
Record on Maintenance Report the following:
Silt/Clay yes no
Cups/ Bags yes no
Leaves yes no
Buckets Removed
• After removal of mulch and debris, measure distance from the top of the
Filterra engineered media soil to the top of the top slab. Compare the
measured distance to the distance shown on the approved Contract Drawings
for the system. Add Filterra media (not top soil or other) to bring media up as
needed to distance indicated on drawings.
Record on Maintenance Report the following:
Distance to Top of Top Slab (inches)
Inches of Media Added
www.ContechES.com/filterra 1800-338-1122 9

a a
jZ7
NRA
4. Mulch replacement
• Add double shredded mulch evenly across the entire unit to a depth of 3".
• Refer to Filterra Mulch Specifications for information on acceptable sources.
• Ensure correct repositioning of erosion control stones by the Filterra inlet to
allow for entry of trash during a storm event.
• Replace Filterra grates correctly using appropriate lifting or moving tools,
taking care not to damage the plant.
5. Plant health evaluation and pruning or replacement
as necessary
• Examine the plant's health and replace if necessary.
• Prune as necessary to encourage growth in the correct directions
Record on Maintenance Report the following:
Height above Grate
Width at Widest Point
Health
Damage to Plant
Plant Replaced
6. Clean area around Filterra
healthy
(ft)
(ft)
unhealthy
yes no
yes no
• Clean area around unit and remove all refuse to be disposed of appropriately.
7. Complete paperwork
• Deliver Maintenance Report and photographs to appropriate location
(normally Contech during maintenance contract period).
• Some jurisdictions may require submission of maintenance reports in
accordance with approvals. It is the responsibility of the Owner to comply with
local regulations.
10 www.ContechES.com/filterra 1800-338-1122

Maintenance Checklist
Drainage
System Failure
Problem
Conditions to Check
Condition that Should Exist
Actions
Excessive
Accumulated sediments or
Inlet should be free of
Inlet
sediment or trash
trash impair free flow of water
obstructions allowing free
Sediments and/or trash should
accumulation.
into Filterra.
distributed flow of water into
be removed.
Filterra.
Trash and debris should be
Mulch Cover
Trash and floatable
Excessive trash and/or debris
Minimal trash or other debris
removed and mulch cover raked
debris accumulation.
accumulation.
on mulch cover.
level. Ensure bark nugget mulch
is not used.
"Ponding" in unit could be
"Ponding" of water
indicative of clogging due
Stormwater should drain
Recommend contact
Mulch Cover
on mulch cover.
to excessive fine sediment
freely and evenly through
manufacturer and replace mulch
accumulation or spill of
mulch cover.
as a minimum.
petroleum oils.
Soil/mulch too wet, evidence of
Vegetation
Plants not growing
spill. Incorrect plant selection.
Plants should be healthy and
Contact manufacturer for advice.
or in poor condition.
Pest infestation. Vandalism to
pest free.
plants.
Plant growth
Plants should be appropriate
Trim/prune plants in accordance
Vegetation
to the species and location of
with typical landscaping and
excessive.
Filterra.
safety needs.
Cracks wider than 1 /2 inch
Structure
Structure has visible
or evidence of soil particles
Vault should be repaired.
cracks.
entering the structure through
the cracks.
Maintenance is ideally to be performed twice annually.
Filterra Inspection & Maintenance Log
Filterra System Size/Model: Location:
Date
Mulch &
Debris
Removed
5-5901
Buckets
Depth of
Mulch
Added
Mulch
Brand
we s
Premium
Height of
Vegetation
Above
Grate
Vegetation
Species
Galaxy
Magnolia
Issues with
System
- Standing water in
downstream structure
Comments
Removed blockage in downstream
structure
www.ContechES.com/filterra 1800-338-1122

Appendix 1 - Filterra° Activation Checklist C \�/I--NTECH�
%�-
ENGINEERED SOLUTIONS
Project Name:
Site Contact Name:
Site Owner/End User Name:
Preferred Activation Date:
Company:
Site Contact Phone/Email:
Site Owner/End User Phone/Email:
(provide 2 weeks minimum from date this form is submitted)
Final Pavement
Landscaping
Construction
Throat
Site
System Size
/ Top Coat
Complete
materials /
Opening
Plant Species
Designation
Complete
/ Grass
Piles / Debris
Measures 4"
Requested
Emerging
Removed
Min. Height
❑ Yes
❑ Yes
❑ Yes
❑ Yes
❑ No
❑ No
❑ No
❑ No
❑ Yes
❑ Yes
❑ Yes
❑ Yes
❑ No
❑ No
❑ No
❑ No
❑ Yes
❑ Yes
❑ Yes
❑ Yes
❑ No
❑ No
❑ No
❑ No
❑ Yes
❑ Yes
❑ Yes
❑ Yes
❑ No
❑ No
❑ No
❑ No
❑ Yes
❑ Yes
❑ Yes
❑ Yes
❑ No
❑ No
❑ No
❑ No
❑ Yes
❑ Yes
❑ Yes
❑ Yes
❑ No
❑ No
❑ No
❑ No
❑ Yes
❑ Yes
❑ Yes
❑ Yes
❑ No
❑ No
❑ No
❑ No
❑ Yes
❑ Yes
❑ Yes
❑ Yes
❑ No
❑ No
❑ No
❑ No
❑ Yes
❑ Yes
❑ Yes
❑ Yes
❑ No
❑ No
❑ No
❑ No
Attach additional sheets as necessary.
NOTE: A charge of $500.00 will be invoiced for each Activation visit requested by Customer where Contech determines that the
site does not meet the conditions required for Activation. ONLY Contech authorized representatives can perform Activation of
Filterra systems; unauthorized Activations will void the system warranty and waive manufacturer supplied Activation and 1 st Year
Maintenance.
Signature
Date
12 www.ContechES.com/filterra 1800-338-1122

Appendix 2 - Planting Requirements for Filterra° Systems
Plant Material Selection
• Select plant(s) as specified in the engineering plans and specifications.
• Select plant(s) with full root development but not to the point where root bound.
• Use local nursery container plants only. Ball and burlapped plants are not permitted.
• For precast Filterra systems with a tree grate, plant(s) must not have scaffold limbs at
least 14 inches from the crown due to spacing between the top of the mulch and the
tree grate. Lower branches can be pruned away provided there are sufficient scaffold
GRAFT
branches for tree or shrub development. CR044hf
• For precast Filterra systems with a tree grate, at the time of installation, it is required _ _ _ _ _ —SOIL SURFACE
that plant(s) must be at least 6" above the tree grate opening at installation for all
Filterra configurations. This DOES NOT apply to Full Grate Cover designs.
• Plant(s) shall not have a mature height greater than 25 feet.
• For standard 21" media depth, a 7 — 15 gallon container size shall be used. Media less than 21" (Filterra boxes only) will
require smaller container plants.
• For precast Filterra systems, plant(s) should have a single trunk at installation, and pruning may be necessary at activation
and maintenance for some of the faster growing species, or species known to produce basal sprouts.
Plant Installation
• During transport protect the plant leaves from wind and excessive jostling.
• Prior to removing the plant(s) from the container, ensure the soil moisture is sufficient to maintain the integrity of the root ball.
If needed, pre -wet the container plant.
• Cut away any roots which are growing out of the container drain holes. Plants with excessive root growth from the drain holes
should be rejected.
• Plant(s) should be carefully removed from the pot by gently pounding on the sides of the container with the fist to loosen root
ball. Then carefully slide out. Do not lift plant(s) by trunk as this can break roots and cause soil to fall off. Extract the root ball
in a horizontal position and support it to prevent it from breaking apart. Alternatively the pot can be cut away to minimize
root ball disturbance.
• Remove any excess soil from above the root flare after removing plant(s) from container.
• Excavate a hole with a diameter 4" greater than the root ball, gently place the plant(s).
• If plant(s) have any circling roots from being pot bound, gently tease them loose without breaking them.
• If root ball has a root mat on the bottom, it should be shaved off with a knife just above the mat line.
• Plant the tree/shrub/grass with the top of the root ball 1" above surrounding media to allow for settling.
• All plants should have the main stem centered in the tree grate (where applicable) upon completion of installation.
• With all trees/shrubs, remove dead, diseased, crossed/rubbing, sharply crotched branches or branches growing excessively
long or in wrong direction compared to majority of branches.
• To prevent transplant shock (especially if planting takes place in the hot season), it may be necessary to prune some of
the foliage to compensate for reduced root uptake capacity. This is accomplished by pruning away some of the smaller
secondary branches or a main scaffold branch if there are too many. Too much foliage relative to the root ball can dehydrate
and damage the plant.
Plant staking may be required.
www.ContechES.com/filterra 1800-338-1122 13

Mulch Installation
• Only mulch that has been meeting Contech Engineered Solutions' mulch specifications can be used in the Filterra system.
• Mulch must be applied to a depth of 3" evenly over the surface of the media.
Irrigation Requirements
• Each Filterra system must receive adequate irrigation to ensure survival of the living system during periods of drier weather.
• Irrigation sources include rainfall runoff from downspouts and/or gutter flow, applied water through the tree grate or in some
cases from an irrigation system with emitters installed during construction.
• At Activation: Apply about one (cool climates) to two (warm climates) gallons of water per inch of trunk diameter over the
root ball.
• During Establishment: In common with all plants, each Filterra plant will require more frequent watering during the
establishment period. One inch of applied water per week for the first three months is recommended for cooler climates (2
to 3 inches for warmer climates). If the system is receiving rainfall runoff from the drainage area, then irrigation may not be
needed. Inspection of the soil moisture content can be evaluated by gently brushing aside the mulch layer and feeling the
soil. Be sure to replace the mulch when the assessment is complete. Irrigate as needed**.
• Established Plants: Established plants have fully developed root systems and can access the entire water column in the media.
Therefore irrigation is less frequent but requires more applied water when performed. For a mature system assume 3.5
inches of available water within the media matrix. Irrigation demand can be estimated as 1" of irrigation demand per week.
Therefore if dry periods exceed 3 weeks, irrigation may be required. It is also important to recognize that plants which are
exposed to windy areas and reflected heat from paved surfaces may need more frequent irrigation. Long term care should
develop a history which is more site specific.
** Five gallons per square yard approximates 1 inch of water Therefore for a 6' by 6' Filterra approximately 20-60 gallons of
water is needed. To ensure even distribution of water it needs to be evenly sprinkled over the entire surface of the filter bed, with
special attention to make sure the root ball is completely wetted. NOTE: if needed, measure the time it takes to fill a five gallon
bucket to estimate the applied water flow rate then calculate the time needed to irrigate the Filterra. For example, if the flow rate
of the sprinkler is 5 gallons/minute then it would take 12 minutes to irrigate a 6' by 6' filter.
14 www.ContechES.com/filterra 1800-338-1122

Notes

i
filtefa
Bioretention Systems
C% NTECH®
ENGINEERED SOLUTIONS
9025 Centre Pointe Drive, Suite 400
West Chester, OH 45069
[e-mail] 1 800-338-1122
www.ContechES.com
© 2018 Contech Engineered Solutions LLC, a QUIKRETE Company
ALL RIGHTS RESERVED. PRINTED IN THE USA.
NOTHING IN THIS CATALOG SHOULD BE CONSTRUED AS A WARRANTY. APPLICATIONS SUGGESTED HEREIN ARE DESCRIBED
ONLY TO HELP READERS MAKE THEIR OWN EVALUATIONS AND DECISIONS, AND ARE NEITHER GUARANTEES NOR
WARRANTIES OF SUITABILITY FOR ANY APPLICATION. CONTECH MAKES NO WARRANTY WHATSOEVER, EXPRESS OR IMPLIED,
RELATED TO THE APPLICATIONS, MATERIALS, COATINGS, OR PRODUCTS DISCUSSED HEREIN. ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND ALL IMPLIED WARRANTIES OF FITNESS FOR ANY PARTICULAR PURPOSE ARE DISCLAIMED BY CONTECH.
PDF 1 /18 SEE CONTECH'S CONDITIONS OF SALE (AVAILABLE AT WWW.COHTECHES.COM/COS) FOR MORE INFORMATION.