HomeMy WebLinkAboutWell Correspondence 00 Deming Street (2) 4
G STATE OF CONNECTICUT
DEPARTMENT OF HEALTH SERVICES
MEMORANDUM
DATE: January 14, 1985
TO: Health Officials Working On EDB Investigations
FROM: Paul Ritsick, Principal Sanitary Engineer
Water Supplies Section
SUBJECT: UPDATE, GRANULAR ACTIVATED CARBON FILTERS FOR EDB REMOVAL
On June 4, 1984 you were sent a letter concerning granular activated
carbon filters and the treatment of EDB in drinking water. Since that time
we have compiled additional data and have discussed filter installations
with various contractors and health officials. I wish to update you at this
time with respect to filter media, contact time, filter sizes, and installation.
Although this update is intended for single family residences it could also
serve as a guidance for multi-family dwellings. Should you have any questions
please contact this office. Thank you.
Filter Media: GAC is still considered to be the most effective means of
treating EDB. Virgin material is required. Manufacturers and specifi-
cations are listed in the attached table.
Contact Time: For EDB levels ranging from .1 ppb to less than 10 ppb a minimum
empty bed contact time of 2 minutes is recommended.
Example: For a flow rate of 5 gallons per 3minute (.67 cubic feet per Minute)
the filter size would be: .67 Ft /Min. x 2 minutes - 1.34 Ft
Design would be for a 1.5 Ft unit.
Note: Flow restrictors may be installed in conjunction with the size
of the filter unit to provide for a desired contact time.
Filter Size: A minimum of 1 cubic foot is recommended.
*If an installation requires 2 cubic feet, the installation of a single
2 cubic foot unit rather than 2-1 cubic foot units is recommended. This
installation is less expensive to install and to maintain (media replace-
ment and water quality testing). Both systems, however, will work.
Installation: Attached is a schematic showing two installation options. Earlier
this year only Option #2 which located the GAC filter before the water storage
tank was recommended. New data indicates that Option #1 which locates the
GAC unit after the water storage tank is also a viable installation. This
b phone: 566-1253
150 Washington Street — Hartford, Connecticut 06106
An Equal Opportunity Employer
is of interest since in many locations it may be easier and less expensive
to install treatment following Option #1. Regardless of which option is
followed the contact time provided is important. Flow restrictors can be
installed in consideration of the filter size to ensure adequate contact
time.
Prefilter: A prefilter is recommended as a means of extending the life of
the GAC media. The prefilter may be a cartridge type, media type or micro
strainer depending upon the amount of particulate matter (iron or sediment)
in the water. If a home already has a filter for iron removal the GAC
unit should be installed after (down stream) that filter.
PR/ch
EDB TREATMENT - SINGLE HOUSEHOLD USE 12/20/8
GRANULAR ACTIVATED CARBON FILTERS Prepared by:
hater Supplies Sectio
Dept,- of Health Service
OPTION #1 - GAC FILTER INSTALLED AFTER THE PRESSURE STORAGE TANK
MINIMUM 1 FT3 OF MEDIA
PRESSURE L
OW
STORAGE ` v RESTRICTOR GAC
E FILTER
TANK FLOW SERVI
WELL SAMPLING METER SAMPLING
TAP TAP
MINIMUM 1 FT3 OF MEDIA
OPTION #2 - GAC FILTER INSTALLED BEFORE THE
PRESSURE STORAGE TANK
FLOW
GATE PRESSURE
RESTRICTOR VALVE
GAC STORAGE
SERVI
FLOW FILTER TANK
METER SAMPLING
WELL SAMPLING TAP
AP
NOTES:
1 . SAMPLING TAP ( 17 ) : TAPS ARE NECESSARY TO SAMPLE WATER BEFORE AND AFTER FILTER IN
ORDER TO INSURE EFFECTIVE TREATMENT.
2. PREFILTER: 1T IS RECOMMENDED THAT A PREFILTER BE INSTALLED BEFORE THE GAC UNIT. IT IS
USED TO REDUCE PARTICULATE MATTER BUILDUP ON THE GAC UNIT. A MEDIA TYPE
PREFILTER REQUIRING BACKWASHING SHOULD NOT BE USED UNLESS THE SEPTIC SYSTEM
IS ADEQUATE OR THE HOME IS ON PUBLIC SEWERS.
3. GATE VALVE: A GATE VALVE LOCATED BEFORE THE PRESSURE TANK IS SHOWN IN OPTION #2. THIS
WOULD ALLOW WATER FROM THE PRESSURE TANK TO BE USED WHILE THE FILTER UNITS
ARE REMOVED OR BEING REPAIRED.
4. FLOW METER: THIS METER SHOULD BE CAPABLE OF MEASURING FLOW (GALLONS PER MINUTE) AND
TOTAL GALLONS PUMPED. THE HOMEOWNER USES THIS INFORMATION TO DETERMINE MEDIA
REPLACEMENT AND TESTING FREQUENCY.
5. FLOW RESTRICTOR: THIS RESTRICTOR SHOULD BE SIZED IN CONJUNCTION WITH THE SIZE OF THE GAC
UNIT TO ENSURE A MINIMUM OF 2 MINUTES CONTACT TIME.
SPECIFICATIONS OF SEVERAL COMMERCIALLY AVAILABLE CARBONS
Cwgon Cslgon Westvaco:
Filbuwb Filtrasorb
physipl Properties 300 400 8x10 12x40
Surface Area,m�lg(BET) 950-1050 1000.1200 850 850
Apparent Density.9/cc OAS 0.44
26 25
Density, backwashed &drained,Iblcu ft 30 30
Real Density,glee 2.1 2.1
Particle Density,g/cc 1.3-1.4 1.3-1.4 1.4 1.4
Effective Size 0.8-0.9 0.55-0.65 0.90 0.65
Uniformity Coefficient 1.8 or less 1.9 or less 1_tl 1_6
Pore Volume,ce/g 0. - 0.9
Mean Particle Diameter,mm 1.51.7 0.9-1.1
Specificstions
Sieve Sizc j U.S.Std.Serics) _
Larger than No. 8-Max. % 8 _ 2
Larger than No. 12-Max.%v S 2
5 I
Smaller than No. 30-Max. %
Smaller than No.40-Max.% 5
900 1000 850 850
Iodine No.
Abrasion No., minimum 70 5 70 7�� g 8. 7
Ash, , 5 7 7
2 2 2 2
Moisture as packed,Max. %
C
VENDORS - GRANULAR ACTIVATED CARBON UNITS (WHOLE HOUSE UNITS)
d
Treatment Company Location Contact Person installSergi Media Disposal
R.J.. Black b Son Watertown, CT Fred Black
274-8853 v v Yes
Aqua Pump Services Stafford Springs, CT John Wittenzellner v v Possibly
684-5349
Zekes Pump Service Windsor Locks, CT Tom Kaplan v v
623-6843
Culligan Water Conditioning East Hartford, CT Rick Yaconiello v v Possibly
289-4355
Aqua Sentry Manchester, CT Daryl Angeloni v v Yes
643-8429
Bidwell Pump Co. Windsor Locks, CT Ray Antonacci v v Possibly
623-6910
Waterco Industries Exeter, N.H. M.L. Bunker v v Yes
603-778-7046
Environmental Ionics Norwalk, CT Pat Sherry v v Yes
853-3322
Dolphin Water Conditioning Norwich Charles Mulholland v v Yes
887-7385
PR/ch
w
5/22/84
STATE OF CONNECTICUT
# Thank You for Sharing Your Idea.
Please send your ideas to: Employees' Suggestion Awards Program, 165 Capitol Ave., Hartford, 06106.
nterdepartment Message SAFE TIME: Handwritten messages are acceptable.
-)-201 RED'. 11/81 STATE OF CONNECTICUT Use carbon if you realhv need a copy. If typewrinen, ignore faint tines.
Stock No. 6938-051-01 - DATE
TITLE 8/6/84
SAW Assistant Director
TO Beth Wienstein
A KCY AQQR1S
preventable Disease Division �l�shington St. - Hartford
TITLE TELEPHONE
NAME Assistant Director 2264
From Edward C. Parker
AGENCY ADDRESS
9 - 122 Washington Street
DEP/Haz. Waste Mngt. Section Room
SUBJECT Disposal of Activated Carbon Contaminated with/EDB
In response to your inquiry to Water Compliance I have attached a copy
of the Department's position regarding the disposal of Activated Carbon
contaminated with EDB. Should you have any questions, please contact
me at 566-2264.
Edward C. Parker
ECP:et
attachment
C_
e A VT TI M E: If<onv enient, handwrite rep(- to sender on this same sheet.
DISPOSAL OF ACTIVATED CARBON CONTAMINATED WITH EDB
To treat water supplies contaminated with EDB, activated carbon filters are being
installed in many homes and at several water companies. Activated carbon is a very
effective media to remove EDB, however, the activated carbon has a finite capacity.
Thus, the activated carbon media must be replaced periodically. The replacement
interval is variable depending upon the concentration of EDB; and water consumption.
For the individual home owner, the replacement interval is estimated to be every
8 to 10 months. The volume of contaminated activated carbon is 1 ft.3.
The activated carbon treatment system is purchased through a vender who will
periodically service the treatment system including the replacement of spent carbon
with fresh carbon. The vendor who replaces the contaminated activated carbon is
therefore responsible for ensuring that the waste carbon is properly disposed of or
treated.
Since EDB is a listed hazardous waste (40CFR Part 261.33) , it must be managed by
the vendor in accordance with Sections 1-48 of Connecticut's Hazardous Waste Management
Regulations. Of particular importance is the requirement that EDB must be transported
to a licensed hazardous waste treatment, storage or disposal facility. Disposal at
municipal landfills is prohibited.
For the vendor who services activated carbon units, the waste carbon must be
managed in accordance with the following requirements:
1. If the vendor generates less than 1000kg/month or accumulates on-site less than
1000kg, : the vendor is considered to be a small quantity generator. As a small
quantity generator, the vendor is required to comply with all the requirements
of Part I Section 2 and Part III, Section 9 of Connecticut's Hazardous Waste
Management Regulations.
2. If the vendor generates more than 1000kg per month of activated carbon contaminate;:
with EDB, or if a vendor generates less than 1000kg per month, but accumulated
more than 1000kg on-site, then the vendor is considered to be a generator. A
generator is required to comply with all the applicable requirements of Parts II
and III of Connecticut's Hazardous Waste Management Regulations.
2 _
3. If the vendor accumulates on-site 1000kg or more of activated carbon contaminated
Z with EDB and stores it for greater than 90 days, then the vendor is considered
to be a storage facility. To be a storage facility, the-vendor must obtain a
permit and comply with all the requirements of Part II, III, V, VI, and VII of
Connecticut's Hazardous Waste Management Regulations.
STATE OF CONNECTICUT
00
DEPARTMENT OF HEALTH SERVICES
MEMORANDUM
DATE: June 4, 1984 j
Ctr N
TO: Health Officials Working On EDB Investigations
FROM: 0. Paul Ritsick, Principal Sanitary Engineer
Water Supplies Section
SUBJECT: GRANULAR ACTIVATED CARBON FILTERS FOR EDB REMOVAL
During the past few months this office has been evaluating the use of
granular activated carbon (GAC) filters as an effective means of removing EDB
from drinking water. After discussions with officials at EPA, the State of
Florida, the University of Connecticut and water treatment companies, the Depart-
ment is recommending the use of GAC for the removal of EDB. We are recommending
a filter containing a minimum of one cubic foot of GAC media. be used, although
there may be instances where larger units or a second GAC filter will be necessary.
Attached is a schematic showing the location of the GAC unit(s) relative to the
water supply line and the water storage tank. Water sampling taps, flow meter and
a prefilter (optional) are also shown as part of the installation. It should also
be noted that the installation provides for the treatment of all water used in the
home. To make this treatment effective, we are requiring that virgin GAC media be
used in all installations; the use of reconditioned GAC media is not acceptable.
For your information, a typical one cubic foot unit measures 10 inches in diameter
and four feet in height.
The Department of Environmental Protection (DEP) is issuing orders to parties
believed to be responsible for EDB contamination. These orders require that the
polluter provide affected residences with bottled water as a short term solution
and also with a new source of water supply or a form of water treatment (including
maintenance and monitoring) as a long term solution. Both you and the homeowner
should realize, however, that if the homeowner wishes to install a GAC unit prior
to an order being implemented, he is doing so at his own expense, since the orderee
is under no legal obligation to reimburse affected parties for corrective action
those parties have taken by themselves. Should the homeowner wish to proceed, we
are recommending that the town conduct a sanitary survey at each well for which
GAC treatment is to be installed. As part of the survey we ask that bacteriolo-
gical, physical and chemical water samples be collected and analyzed. A review
of that water quality will be useful in evaluating the need for a prefilter or
disinfection.
With respect to testing the GAC units for their effectiveness in removing
EDB, the homeowner should be informed that periodic monitoring of the filter is
necessary and that it is the homeowner's responsibility to have tests done at a
private laboratory. By reading the flow meter over a period of time and testing
for the presence of EDB, the homeowner should have a good feel for when the media
needs to be replaced. With respect to the disposal of exhausted GAC media, we
v Phone: 566-1253
ISO Washington Street — Hartford, Connecticut 06106
An Equal Opportunity Employer
prefer to leave that responsibility with the filter installer (see attached vendor
list). We will be working with DEP to arrive at a policy relative to the disposal
of GAC media containing EDB.
The Water Supplies Section will provide you with additional information con-
cerning filters and EDB as that information becomes available. Should you have
any questions please feel free to contact this office. Thank you.
PR/ch
Enclosure (2)
cc: Peter Galbraith, Director
Beth Weinstein, Assistant Director
DEP, Water Compliance
'REPARED BY: PAUL RITSICK HOUSEHOLD FILTER SYSTEM FOR EDB REMOVAL
WATER SUPPLIES SECT.
DEPT. OF HEALTH SERV. STORAGE TANK
N1 GAC #2 GAC
FILTER FILTER (OPTIONAL
GRANULAR rGRANULAR�
ACTIVATED IACTIVATE9
CARBON CARBON
1 CUBIC I CUBIC I
�
FLOW REGULATING VALVE 'OR FOOT FOOT I
GATE VALVE WITH FLOW MINIMUM) I
RESTRICTOR
WATER PIPE I FLOW TOTALIZING METER
FROM WELL PRESSURE
GAUGE
1 GATE HOUSE
I I VALVE USE
SAMPLING SAMPLING SAMPLING FAUCET
FAUCET FAUCET ( IF #2 FILTER
USED)
PRE FILTER (OPTIONAL)
CARTRIDGE TYPE OR
OTHER AS NEEDED
NOTES:
1. Prefilter: If water quality warrants this filter would be used to reduce particulate matter buildup on the GAC
unit(s). A media type unit requiring backwashing is not shown and should not be installed unless the
septic system is adequate or the home is on sewer.
2. Faucets: Faucets are necessary to evaluate water quality before and after filtration.
3. Gate Valves These valves would provide for the removal of filter units or flow meter for repair or maintenance
And Bypass: purposes. We do not recommend the installation of filter bypass plumbing.
4. Flow Totalizing Meter: This meter should be capable of measuring flow in terms of gallons per minute and total
gallons pumped. Meter readings accompanied with water quality data will provide the homeowner with
useful information as to when the GAC filter media or prefilter media would require replacement.
5. Flow Regulating Valve or Flow Restrictor: This device would regulate the flow across the filters and provide
for a uniform loading rate. This should be considered for wells with high pumping rdtes so that
an adequate contact time can be provided with the GAC media.
ay
STATE OF CONNECTICUT
DEPARTMENT OF HEALTH SERVICES
MEMORANDUM
DATE: June 4, 1984
TO: Health Officials Working On EDB Investigations
FROM: Paul Ritsick, Principal Sanitary Engineer
Water Supplies Section
SUBJECT: GRANULAR ACTIVATED CARBON FILTERS FOR EDB REMOVAL
During the past few months this office has been evaluating the use of
granular activated carbon (GAC) filters as an effective means of removing EDB
from drinking water. After discussions with officials at EPA, the State of
Florida, the University of Connecticut and water treatment companies, the Depart-
ment is recommending the use of GAC for the removal of EDB. We are recommending
a filter containing a minimum of one cubic foot of GAC media be used, although
there may be instances where larger units or a second GAC filter will be necessary.
Attached is a schematic showing the location of the GAC unit(s) relative to the
water supply line and the water storage tank. Water sampling taps, flow meter and
a prefilter (optional) are also shown as part of the installation. It should also
be noted that the installation provides for the treatment of all water used in the
home. To make this treatment effective, we are requiring that virgin GAC media be
used in all installations; the use of reconditioned GAC media is not acceptable.
For your information, a typical one cubic foot unit measures 10 inches in diameter
and four feet in height.
The Department of Environmental Protection (DEP) is issuing orders to parties
believed to be responsible for EDB contamination. These orders require that the
polluter provide affected residences with bottled water as a short term solution
and also with a new source of water supply or a form of water treatment (including
maintenance and monitoring) as a long term solution. Both you and the homeowner
should realize, however, that if the homeowner wishes to install a GAC unit prior
to an order being implemented, he is doing so at his own expense, since the orderee
is under no legal obligation to reimburse affected parties for corrective action
those parties have taken by themselves. Should the homeowner wish to proceed, we
are recommending that the town conduct a sanitary survey at each well for which
GAC treatment is to be installed. As part of the survey we ask that bacteriolo-
gical, physical and chemical water samples be collected and analyzed. A review
of that water quality will be useful in evaluating the need for a prefilter or
disinfection.
With respect to testing the GAC units for their effectiveness in removing
EDB, the homeowner should be informed that periodic monitoring of the filter is
necessary and that it is the homeowner's responsibility to have tests done at a
private laboratory. By reading the flow meter over a period of time and testing
for the presence of EDB, the homeowner should have a good feel for when the media
needs to be replaced. With respect to the disposal of exhausted GAC media, we
v Phone: 566-1253
150 Washington Street — Hartford, Connecticut 06106
An Equal Opportunity Employer
prefer to leave that responsibility with the filter installer (see attached vendor
list). We will be working with DEP to arrive at a policy relative to the disposal
of GAC media containing EDB.
The Water Supplies Section will provide you with additional information con-
cerning filters and EDB as that information becomes available. Should you have
any questions please feel free to contact this office. Thank you.
PR/ch
Enclosure (2)
cc: Peter Galbraith, Director
Beth Weinstein, Assistant Director
DEP, Water Compliance
'REPARED BY: PAUL RITSICK HOUSEHOLD FILTER SYSTEM FOR EDB REMOVAL
WATER SUPPLIES SECT.
DEPT. OF HEALTH SERV. STORAGE TANK
N1 GAC #2 GAC
FILTER FILTER (OPTIONAL
GRANULAR GRANULAR'
ACTIVATED IACTIVATE9
CARBON CARBON
1 CUBIC 1 CUBIC I
(
FLOW REGULATING VALVE OR FOOT FOOT I
GATE VALVE WITH FLOW MINIMUM)
RESTRICTOR
WATER PIPE I FLOW TOTALIZING METER
FROM WELL PRESSURE
GAUGE
I GATE HOUSE
I 1 VALVE USE
SAMPLING SAMPLING SAMPLING FAUCET
FAUCET FAUCET ( IF #2 FILTER
USED)
PRE FILTER (OPTIONAL)
CARTRIDGE TYPE OR
OTHER AS NEEDED
NOTES:
1. Prefilter: If water quality warrants this filter would be used to reduce particulate matter buildup on the GAC
unit(s). A media type unit requiring backwashing is not shown and should not be installed unless the
septic system is adequate or the home is on sewer.
2. Faucets: Faucets are necessary to evaluate water quality before and after filtration.
3. Gate Valves These valves would provide for the removal of filter units or flow meter for repair or maintenance
And Bypass: purposes. We do not recommend the installation of filter bypass plumbing.
4. Flow Totalizing Meter: This meter should be capable of measuring flow in terms of gallons per minute and total
gallons pumped. Meter readings accompanied with water quality data will provide the homeowner with
useful information as to when the GAC filter media or prefilter media would require replacement.
5. Flow Regulating Valve or Flow Restrictor: This device would regulate the flow across the filters and provide
for a uniform loading rate. This should be considered for wells with high pumping rdtes so that
an adequate contact time can be provided with the GAC media.
VENDORS - GRANULAR ACTIVATED CARBON UNITS (WHOLE HOUSE UNITS)
Treatment Company Location Contact Person Install Service Media Disposal
R.J. Black & Son Watertown, CT Fred Black
274-8853 v v Yes
Aqua Pump Services Stafford Springs, CT John Wittenzellner v v Possibly
684-5349
Zekes Pump Service Windsor Locks, CT Tom Kaplan v v
623-6843
Culligan Water Conditioning East Hartford, CT Rick Yaconiello v v Possibly
289-4355
Aqua Sentry Manchester, CT Daryl Angeloni v v Yes
643-8429
Bidwell Pump Co. Windsor Locks, CT Ray Antonacci v v Possibly
623-6910
Waterco Industries Exeter, N.H. M.L. Bunker v v Yes
603-778-7046
Environmental Ionics Norwalk, CT Pat Sherry v v Yes
853-3322
Dolphin Water Conditioning Norwich Charles Mulholland v v Yes
887-7385
PR/ch
w
5/22/84
STATE OF CONNECTICUT
DEPARTMENT OF HEALTH SERVICES
MEMORANDUM
DATE: June 4, 1984
TO: Health Officials Working On EDB Investigations
FROM: K. Paul Ritsick, Principal Sanitary Engineer
Water Supplies Section
SUBJECT: GRANULAR ACTIVATED CARBON FILTERS FOR EDB REMOVAL
During the past few months this office has been evaluating the use of
granular activated carbon (GAC) filters as an effective means of removing EDB
from drinking water. After discussions with officials at EPA, the State of
Florida, the University of Connecticut and water treatment companies, the Depart-
ment is recommending the use of GAC for the removal of EDB. We are recommending
a filter containing a minimum of one cubic foot of GAC media be used, although
there may be instances where larger units or a second GAC filter will be necessary.
Attached is a schematic showing the location of the GAC unit(s) relative to the
water supply line and the water storage tank. Water sampling taps, flow meter and
a prefilter (optional) are also shown as part of the installation. It should also
be noted that the installation provides for the treatment of all water used in the
home. To make this treatment effective, we are requiring that virgin GAC media be
used in all installations; the use of reconditioned GAC media is not acceptable.
For your information, a typical one cubic foot unit measures 10 inches in diameter
and four feet in height.
The Department of Environmental Protection (DEP) is issuing orders to parties
believed to be responsible for EDB contamination. These orders require that the
polluter provide affected residences with bottled water as a short term solution
and also with a new source of water supply or a form of water treatment (including
maintenance and monitoring) as a long term solution. Both you and the homeowner
should realize, however, that if the homeowner wishes to install a GAC unit prior
to an order being implemented, he is doing so at his own expense, since the orderee
is under no legal obligation to reimburse affected parties for corrective action
those parties have taken by themselves. Should the homeowner wish to proceed, we
are recommending that the town conduct a sanitary survey at each well for which
GAC treatment is to be installed. As part of the survey we ask that bacteriolo-
gical, physical and chemical water samples be collected and analyzed. A review
of that water quality will be useful in evaluating the need for a prefilter or
disinfection.
With respect to testing the GAC units for their effectiveness in removing
EDB, the homeowner should be informed that periodic monitoring of the filter is
necessary and that it is the homeowner's responsibility to have tests done at a
private laboratory. By reading the flow meter over a period of time and testing
for the presence of EDB, the homeowner should have a good feel for when the media
needs to be repladed. With respect to the disposal of exhausted GAC media, we
v Phone: 566-1253
150 Washington Street — Hartford, Connecticut 06106
An Equal Opportunity Employer
prefer to leave that responsibility with the filter installer (see attached vendor
list). We will be working with DEP to arrive at a policy relative to the disposal
of GAC media containing EDB.
The Water Supplies Section will provide you with additional information con-
cerning filters and EDB as that information becomes available. Should you have
any questions please feel free to contact this office. Thank you.
PR/ch
Enclosure (2)
cc: Peter Galbraith, Director
Beth Weinstein, Assistant-Director
DEP, Water Compliance
(EPARED BY: PAUL RITSICK HOUSEHOLD FILTER SYSTEM FOR EDB REMOVAL
WATER SUPPLIES SECT. STORAGE TANK
DEPT. OF HEALTH SERV. //1 GAC N2 GAC
FILTER FILTER (OPTIONAL
RANULAR GRANULAR
ACTIVATED IACTIVATE9
CARBON CARBON
1 CUBIC 1 CUBIC I
� �
FLOW REGULATING VALVE OR FOOT FOOT
GATE VALVE WITH FLOW MINIMUM)
RESTRICTOR 1
WATER PIPE � FLOW TOTALIZING METER
PRESSURE
FROM WELL ?- GAUGE
war
GATE HOUSE
I 1 VALVE USE
SAMPLING SAMPLING SAMPLING FAUCET
FAUCET FAUCET ( IF #2 FILTER
USED)
U
PRE FILTER (OPTIONAL)
CARTRIDGE TYPE OR
OTHER AS NEEDED
NOTES:
1. Prefilter: If water quality warrants this filter would be used to reduce particulate matter buildup on the GAC
unit(s) . A media type unit requiring backwashing is not shown and should not be installed unless the
septic system is adequate or the home is on sewer.
2. Faucets: Faucets are necessary to evaluate water quality before and after filtration.
3. Gate Valves These valves would provide for the removal of filter units or flow meter for repair or maintenance
And Bypass: purposes. We do not recommend the installation of filter bypass plumbing.
4. Flow Totalizing Meter: This meter should be capable of measuring flow in terms of gallons per minute and total
gallons pumped. Meter readings accompanied with water quality data will provide the homeowner with
useful information as to when the GAC filter media or prefilter media would require replacement.
S. Flow Regulating Valve or Flow Restrictor: This device would regulate the flow across the filters and provide
for a uniform loading rate. This should be considered for wells with high pumping rates so that
an adequate contact time can be provided with the GAC media.
... .. ... ... .. ... .. .. . . ....
VENDORS - GRANULAR ACTIVATED CARBON UNITS (WHOLE HOUSE UNITS)
Treatment Company Location Contact Person Install Service Media Disposal
K.J. Black & Son Watertown, CT Fred Black
274-8853 v v Yes
Aqua Pump Services Stafford Springs, CT John Wittenzellner v v Possibly
684-5349
Zekes Pump Service Windsor Locks, CT Tom Kaplan v v
623-6843
Culligan Water Conditioning East Hartford, CT Rick Yaconiello v v Possibly
289-4355
Aqua Sentry Manchester, CT Daryl Angeloni v v Yes
643-8429
Bidwell Pump Co. Windsor Locks, CT Ray Antonacci v v Possibly
623-6910
Waterco Industries Exeter, N.H. M.L. Bunker v v Yes
603-778-7046
Environmental Ionics Norwalk, CT Pat Sherry v v Yes
853-3322
Dolphin Water Conditioning Norwich Charles Mulholland v v Yes
887-7385
PR/ch
w
5/22/84
b
STATE OF CONNECTICUT
DEPARTMENT OF HEALTH SERVICES
MEMORANDUM
DATE: June 4, 1984
TO: Health Officials Working On EDB Investigations
FROM: � Paul Ritsick, Principal Sanitary Engineer
Water Supplies Section
SUBJECT: GRANULAR ACTIVATED CARBON FILTERS FOR EDB REMOVAL
During the past few months this office has been evaluating the use of
granular activated carbon (GAC) filters as an effective means of removing EDB
from drinking water. After discussions with officials at EPA, the State of
Florida, the University of Connecticut and water treatment companies, the Depart-
ment is recommending the use of GAC for the removal of EDB. We are recommending
a filter containing a minimum of one cubic foot of GAC media be used, although
there may be instances where larger units or a second GAC filter will be necessary.
Attached is a schematic showing the location of the GAC unit(s) relative to the
water supply line and the water storage tank. Water sampling taps, flow meter and
a prefilter (optional) are also shown as part of the installation. It should also - -
be noted that the installation provides for the treatment of all water used in the
home. To make this treatment effective, we are requiring that virgin GAC media be
used in all installations; the use of reconditioned GAC media is not acceptable.
For your information, a typical one cubic foot unit measures 10 inches in diameter
and four feet in height.
The Department of Environmental Protection (DEP) is issuing orders to parties
believed to be responsible for EDB contamination. These orders require that the
polluter provide affected residences with bottled water as a short term solution
and also with a new source of water supply or a form of water treatment (including
maintenance and monitoring) as a long term solution. Both you and the homeowner
should realize, however, that if the homeowner wishes to install a GAC unit prior
to an order being implemented, he is doing so at his own expense, since the orderee
is under no legal obligation to reimburse affected parties for corrective action
those parties have taken by themselves. Should the homeowner wish to proceed, we
are recommending that the town conduct a sanitary survey at each well for which
GAC treatment is to be installed. As part of the survey we ask that bacteriolo-
gical, physical and chemical water samples be collected and analyzed. A review
of that water quality will be useful in evaluating the need for a prefilter or
disinfection.
With respect to testing the GAC units for their effectiveness in removing
EDB, the homeowner should be informed that periodic monitoring of the filter is
necessary and that it is the homeowner's responsibility to have tests done at a
private laboratory. By reading the flow meter over a period of time and testing
for the presence of EDB, the homeowner should have a good feel for when the media
needs to be replaced. With respect to the disposal of exhausted GAC media, we
v phone: 566-1253
ISO Washington Street — Hartford, Connecticut 06106
An Equal Opportunity Employer
prefer to leave that responsibility with the filter installer (see attached vendor
list) .• We will be working with DEP to arrive at a policy relative to the disposal
of GAC media containing EDB.
The Water Supplies Section will ,provide you with additional information con-
cerning filters and EDB as that 'information becomes available. Should you have
any questions please feel free to contact this office. Thank you.
PR/ch
Enclosure (2)
cc: Peter Galbraith, Director
Beth Weinstein, Assistant Director
DEP, Water Compliance
REPARED BY: PAUL RITSICK HOUSEHOLD FILTER SYSTEM FOR EDO REMOVAL
WATER SUPPLIES SECT.
STORAGE TANK
DEPT. OF HEALTH SERV.
#1 GAC N2 GAC
FILTER FILTER (OPTIONAL
GRANULAR GRANULAR
ACTIVATED IACTIVATE4
CARBON CARBON
1 CUBIC ( 1 CUBIC
�
FLOW REGULATING VALVE OR FOOT FOOT II
GATE VALVE WITH FLOW MINIMUM)
RESTRICTOR i
WATER PIPE � FLOW TOTALIZING METER
FROM WELL PRESSURE
GAUGE
GATE HOUSE
I VALVE USE
SAMPLING SAMPLING SAMPLING FAUCET
FAUCET FAUCET ( IF N2 FILTER
USED)
U
PRE FILTER (OPTIONAL)
CARTRIDGE TYPE OR
OTHER AS NEEDED
NOTES:
1. Prefilter: If water quality warrants this filter would be used to reduce particulate matter buildup on the GAC
unit(s). A media type unit requiring backwashing is not shown and should not be installed unless the
septic system is adequate or the home is on sewer.
2. Faucets: Faucets are necessary to evaluate water quality before and after filtration.
3. Gate Valves These valves would provide for the removal of filter units or flow meter for repair or maintenance
And Bypass: purposes. We do not recommend the installation of filter bypass plumbing.
4. Flow Totalizing Meter: This meter should be capable of measuring flow in terms of gallons per minute and total
gallons pumped. Meter readings accompanied with water quality data will provide the homeowner with
useful information as to when the GAC filter media or prefilter media would require replacement.
S. Flow Regulating Valve or Flow Restrictor: This device would regulate the flow across the filters and provide
for a uniform loading rate. This should be considered for wells with high pumping rapes so that
an adequate contact time can be provided with the GAC media.
t
VENDORS - GRANULAR ACTIVATED CARBON UNITS (WHOLE HOUSE UNITS)
r
Treatment Company Location Contact Person Install Service Media Disposal
R.J. Black & Son Watertown, CT Fred Black
274-8853 v v Yes
Aqua Pump Services Stafford Springs, CT John Wittenzellner v v Possibly
684-5349
Zekes Pump Service Windsor Locks, CT Tom Kaplan v v
623-6843
Culligan Water Conditioning East Hartford, CT Rick Yaconiello v v Possibly
289-4355
Aqua Sentry Manchester, CT Daryl Angeloni v v Yes
643-8429
Bidwell Pump Co. Windsor Locks, CT Ray Antonacci v v Possibly
623-6910
Waterco Industries Exeter, N.H. M.L. Bunker v v Yes
603-778-7046
Environmental Ionics Norwalk, CT Pat Sherry v v Yes
853-3322
Dolphin Water Conditioning Norwich Charles Mulholland v v Yes
887-7385
PR/ch
w
5/22/84