NCG590002_More Information (Received)_20210924

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David Honeycutt
Carpenter, Sydney
[External] Bailey NPDES Well #1 (NCG590001) and Well #2 (NCG590002).
Friday, September 24, 2021 2:46:04 PM
06 BAILEY SUBMITTAL PACK FILTER MEDIAS DATA SHEETS.pdf
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Sydney,
The Town of Bailey has recently completed replacing the filter systems at each of the
above wells. The filters are the same size and approximate type as the previous units but
utilize a slightly different media that doesn't require a permanganate feed. The new media
is a greensandplus per the attached sheets from the submittals. We discussed this with
Brianna Young (formerly with the NPDES Unit) during design and she indicated we should
submit the information after the filter media type was confirmed. I think this is basically a
like for like replacement from the standpoint of the NPDES permit but I want to confirm
what information is needed to clarify and verify with you if any changes are necessary.
Please feel free to give me a call if you have any questions. Thanks,
mcgdl
Shaping
Communities
Together
David Honeycutt, P.E.
Principal/Pinehurst Office Manager
McGill Associates, PA
5 Regional Circle, Suite A, Pinehurst, NC 28374
T 910.295.3159
C 910.690.2583
[e-mail]
mcgillassociates.com

DATA SHEETS
Item: FILTER MEDIAS
Model No.: GREENSAND PLUS / ANTHRACITE #1
Manufacturer: INVERSAND / CLACK CORP.
Size & Location: 12" DEPTH GREENSAND PLUS / 18" DEPTH ANTHRACITE
Normal Operating Range, Pressure, Flow, etc.:
Necessary Field Adjustment(s): N/A
REFER TO THE MANUFACTURER'S DATA SHEETS
WHICH FOLLOW FOR THIS SECTION.

nversand Company
GREENSANDokes
Performance Media for
Water Filtration
Removes iron, manganese,
hydrogen sulfide, arsenic
and radium.
GreensandPlusTM is a black filter
media used for removing
soluble iron, manganese, hydro-
gen sulfide, arsenic and radium
from groundwater supplies.
The manganese dioxide coated
surface of GreensandPlus acts
as a catalyst in the oxidation
reduction reaction of iron and
manganese.
The silica sand core of
GreensandPlus allows it to
withstand waters that are low in
silica, TDS and hardness
without breakdown.
GreensandPlus is effective at
higher operating temperatures
and higher differential pressures
than standard manganese
greensand. Tolerance to higher
differential pressure can provide
for longer run times between
backwashes and a greater
margin of safety.
Systems may be designed using
either vertical or horizontal
pressure filters, as well as
gravity filters.
GreensandPlus is a proven
technology for iron, manganese,
hydrogen sulfide, arsenic and
radium removal. Unlike other
media, there is no need for
226 Atlantic Avenue, P.O. 650 • Clayton, NJ 08312
Phone [phone] Fax [phone]
Email: [e-mail] • www.inversand.com
GREENSANDPLUS- TECHNICAL DATA
GREENSANDPLUS PRESSURE DROP
(CLEAN BED)
PRESSURE DROP, PSI/FT
1.0
1.6
1.4
12
1
0.0
60
0.7
0.6
9L
0.4
9s
021
0..2
0.10
0.16
0.14
0.12
01
4 5 5 7 8
FLOW RATE (GPM/FT')
BED EXPANSION DURING BACKWASHING
BACKWASH RATE, GPM/FT'
16
,t
0
TEMPERATURE °F
7
extensive preconditioning of filter
media or lengthy startup periods
during which required water
quality may not be met.
GreensandPlus is an exact
replacement for manganese
greensand. It can be used in CO
or IR applications and requires
no changes in backwash rate or
times or chemical feeds.
GreensandPlus has the WQA
Gold Seal Certification for
compliance with NSF/ANSI 61.
REACH Registration
01-2119452801-43-0020
for import to the EU.
Packaging is available in 1/2
cubic foot bags or 1 metric
ton (2,205 Ibs) bulk sacks.
1 of4

PHYSICAL CHARACTERISTICS
Physical Form
Black, nodular granules shipped in a dry form
Apparent Density
88 pounds per cubic foot net (1410.26 kg/m3)
Shipping Weight
90 pounds per cubic foot gross (1442.31 kg/m3)
Specific Gravity
Approximately 2.4
Porosity
Approximately 0.45
Screen Grading (dry)
18 X 60 mesh
Effective Size
0.30 to 0.35 mm
METHOD OF OPERATION CO
GreensandPlus: Catalytic Oxidation (CO)
RAW WATER INLET
Oxidant
GreensandPlus
Filter
GreensandPlus
Media
FILTERED WATER
OUTLET
Uniformity Coefficient
Less than 1.60
pH Range
6.2-8.5 (see General Notes)
MaximumT emperature
No limit
Backwash Rate
Minimum 12 gpm/sq. ft. at 55°F (29.4 m/hr @ 12.78°C)
(see expansion chart)
Service Flow Rate
2 -12 gpm/sq. ft (4.9m/hr - 29.4 m/hr)
Minimum Bed Depth
15 inches (381 mm) of each media for dual
media beds or 30 inches minimum (762 mm)
of GreensandPlus alone.
Catalytic Oxidation (CO) operation is
recommended in applications where iron
removal is the main objective in well waters
with or without the presence of manganese.
This method involves the feeding of a
predetermined amount of chlorine (Cl2)
or other strong oxidant directly to the raw
water before the GreensandPlus Filter.
Chlorine should be fed at least 10-20 seconds
upstream of the filter, or as far upstream of the
filter as possible to insure adequate contact
time. A free chlorine residual carried through
the filter will maintain GreensandPlus in a con-
tinuously regenerated condition.
For operation using chlorine, the demand
can be estimated as follows:
mg/L Cl2 = (1 x mg/L Fe) + (3 x mg/L Mn) +
(6x mg/L H2S) + (8 x mg/L NH3)

SUGGESTED OPERATING CONDITIONS
Bed Type
Dual media: anthracite 15-18 in. (381 mm -
457 mm) and GreensandPlus 15-24 in.
(381 mm - 610 mm)
Capacity
700-1200 grains of oxidized iron and
manganese/sq.ft. of bed area based on
oxidant demand and operation to iron break
through or dp limitations.
Backwash
Sufficient rate using treated water to produce
40% bed expansion until waste water is clear,
or for 10 minutes, whichever occurs first.
Air/Water Scour
Optional using 0.8-2.0 cfm/sq. ft. (15 m/hr - 7 m/hr)
with a simultaneous treated water backwash
at 4.0-4.5 gpm/sq. ft. (9.8 m/hr -11.03 m/hr).
Raw Water Rinse
At normal service flow rate for 3 minutes or
until effluent is acceptable.
Flow Rate
Recommended flow rates with CO operation
are 2-12 gpm/sq. ft. (4.9 m/hr-29.4 m/hr).
High concentrations of iron and manganese
usually require lower flow rates for equivalent
run lengths. Higher flow rates can be
considered with very low concentrations of
iron and manganese. For optimizing design
parameters, pilot plant testing is
recommended.The run length between
backwashes can be estimated as follows:
What is the run length for a water containing
1.7 mg/L iron and 0.3 mg/L manganese at a
4 gpm/sq. ft. service rate:
Contaminant loading
= (1 x mg/L Fe) + (2 x mg/L Mn)
= (1 x 1.7) + (2 x 0.3)
= (2.3 mg/L or 2.3/17.1 = 0.13
grains/gal. (gpg)
At 1,200 grains / sq. ft. loading _ 0.13 gpg
= 9,230 gal./sq. ft.
At 4 gpm / sq. ft. service rate 9,230/4
= 2,307 min.
The backwash frequency is approximately
every 32-38 hours of actual operation.
The Intermittent regeneration (IR) operation is available for certain applications.
Contact your Inversand representative for additional information.
GENERAL NOTES
pH
Raw waters having natural pH of 6.2 or above
can be filtered through GreensandPlus
without pH correction. Raw waters with a pH
lower than 6.2 should be pH -corrected to 6.5-
6.8 before filtration. Additional alkali should be
added following the filters if a pH higher than
6.5-6.8 is desired in the treated water. This pre-
vents the possible adverse reaction and forma-
tion of a colloidal precipitate that sometimes
occurs with iron and alkali at a pH above 6.8.
Initial Conditioning of GreensandPlus
GreensandPlus media must be backwashed
prior to adding the anthracite cap. The
GreensandPlus backwash rate must be a mini-
mum of 12 gpm/sq. ft. @ 55 ° F.
After backwashing is complete, the
GreensandPlus must be conditioned. Mix 0.5
gal. (1.9 L) of 6% household bleach or
0.2 gal (0.75 L) of 12% sodium hypochlorite for

Clack Anthracite is a select coal, mined and processed for use in
water filtration. It is ideal for single bed, dual bed or multi -media
filtration systems.
Anthracite
ADVANTAGES
• Higher service flows and longer filter
runs than equivalent sand filters
• Close attention to gradation,
hardness and purity assures
consistent and reliable performance
• Unique density allows Clack
Anthracite to be combined with
other filtration media in multi -media
filters
• Lower uniformity coefficient has less
oversized and undersized particles
resulting in a highly uniform bed
PHYSICAL PROPERTIES
• Color: Black
• Bulk Density: 50 lbs./cu. ft.
• Hardness: 3.0-3.8 (Mohs scale)
• Effective Size:
#1 Anthracite: 0.6-0.8 mm
#11/2 Anthracite: 0.85-0.95 mm
#2 Anthracite: 1.7-2.0 mm
• Uniformity Coefficient:
#1 Anthracite: <1.7
#11/2 Anthracite: <1.7
#2 Anthracite: <1.6
• Mesh Size:
#1 Anthracite: 14x30
#11/2 Anthracite: 10x20
#2 Anthracite: 4x12
• Acid Solubility: <1%
• Caustic Solubility: <1%
• Apparent Specific Gravity: 1.6 gm/cc
• Meets AWWA Standard B100-01
1
CONDITIONS FOR OPERATION
• Bed depth: 24-36 in., 10-18 in multi -
bed filters
• Freeboard: 50% of bed depth (min.)
• Service flow rate: 5 gpm/sq. ft.
or higher depending upon local
conditions
• Backwash flow rate:
#1 Anthracite: 12-18 gpm/sq. ft.
#11/2 Anthracite: 18-25 gpm/sq. ft.
#2 Anthracite: use air scour
• Backwash bed expansion: 20-40%
of bed depth
Although its potential for water treatment
has been recognized since ancient
times, anthracite coal was not used for
this purpose until the beginning of the
20th century. Crushed Anthracite makes
an excellent medium density filtration
media. Clack Anthracite is mined from the
finest Pennsylvania coal. It is specifically
selected for water treatment, and during
its production goes through several sizing
inspections. Representative samples
are randomly chosen for a complete
laboratory quality control analysis for
effective size, uniformity coefficient,
specific gravity, acid solubility and
hardness.
Because of its angular shape, some of the
sediment penetrates deeper into the bed.
When compared to equivalent filter sands,
this means longer filter runs and less head
loss. Backwash rates are also reduced.
Because of its unique density, Clack
Anthracite can be used in multi -media
filters. At 50 Ibs/ft3, it will hydraulically
classify and remain above heavier
media such as Filter Sand or Manganese
Greensand, providing a prefiltration layer.