"Water Treatment Plant Classification Form" - Connecticut

Water Treatment Plant Classification Form is a legal document that was released by the Connecticut State Department of Public Health - a government authority operating within Connecticut.

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  • Released on July 26, 2004;
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1
STATE OF CONNECTICUT
DEPARTMENT OF PUBLIC HEALTH
WATER TREATMENT PLANT CLASSIFICATION FORM
Public Water System (PWS) Name:
Date:
PWS Identification Number (PWSID):CT ___ ___ ___ ___ ___ ___ ___
Water Treatment Plant Name:
Population served:
Form completed by:
Title:
Phone number: (
)
-
SDWIS State Asgn No.:______________________________For State Use Only
ITEM
VALUE
POINTS
Size (2 to 20 points)
Maximum population served, peak day (1 to10)__________________
1/10,000
or part
Design flow average day or peak month's average_______________
1/MGD
day, whichever is greater (1 to 10)
or part
Water Supply Sources
Groundwater_____________________________________________
3
Groundwater under the direct influence of surface water___________
5
Surface water____________________________________________
5
Average raw water quality varies enough to require_______________
0-10
treatment changes 10% of the time
Little or no variation__________________________________
0
High variation. Raw water quality subject to serious_________
10
industrial waste pollution
Raw water quality is subject to or has elevated:
Taste and/or odor levels_________________________________
3
Color levels___________________________________________
3
Iron and/or manganese levels_____________________________
5
Turbidity levels________________________________________
5
Coliform and/or fecal counts______________________________
5
Algal growths__________________________________________
5
Raw water quality is subject to periodic:
Industrial and commercial waste pollution____________________
5
Agricultural pollution____________________________________
5
Urban runoff, erosion and storm water pollution_______________
3
Recreational use (boating, fishing,etc.)______________________
2
Urban development and residential land use pollution__________
2
Phone: (860) 509-7333
Telephone Device for the Deaf (860) 509-7191
410 Capitol Avenue - MS # 51WAT
P.O. Box 340308 Hartford, CT 06134
An Equal Opportunity Employer
1
STATE OF CONNECTICUT
DEPARTMENT OF PUBLIC HEALTH
WATER TREATMENT PLANT CLASSIFICATION FORM
Public Water System (PWS) Name:
Date:
PWS Identification Number (PWSID):CT ___ ___ ___ ___ ___ ___ ___
Water Treatment Plant Name:
Population served:
Form completed by:
Title:
Phone number: (
)
-
SDWIS State Asgn No.:______________________________For State Use Only
ITEM
VALUE
POINTS
Size (2 to 20 points)
Maximum population served, peak day (1 to10)__________________
1/10,000
or part
Design flow average day or peak month's average_______________
1/MGD
day, whichever is greater (1 to 10)
or part
Water Supply Sources
Groundwater_____________________________________________
3
Groundwater under the direct influence of surface water___________
5
Surface water____________________________________________
5
Average raw water quality varies enough to require_______________
0-10
treatment changes 10% of the time
Little or no variation__________________________________
0
High variation. Raw water quality subject to serious_________
10
industrial waste pollution
Raw water quality is subject to or has elevated:
Taste and/or odor levels_________________________________
3
Color levels___________________________________________
3
Iron and/or manganese levels_____________________________
5
Turbidity levels________________________________________
5
Coliform and/or fecal counts______________________________
5
Algal growths__________________________________________
5
Raw water quality is subject to periodic:
Industrial and commercial waste pollution____________________
5
Agricultural pollution____________________________________
5
Urban runoff, erosion and storm water pollution_______________
3
Recreational use (boating, fishing,etc.)______________________
2
Urban development and residential land use pollution__________
2
Phone: (860) 509-7333
Telephone Device for the Deaf (860) 509-7191
410 Capitol Avenue - MS # 51WAT
P.O. Box 340308 Hartford, CT 06134
An Equal Opportunity Employer
2
Note: Each unit process should have points assigned only once
Chemical Treatment/Addition Process
Fluoridation______________________________________________
5
Disinfection
Ultraviolet (UV)________________________________________
2
Gaseous chlorine______________________________________
5
Liquid or powdered chlorine______________________________
5
Chlorine dioxide________________________________________
5
Ozonation (on-site generation)____________________________
5
PH adjustment (calcium carbonate, carbon dioxide, ____________
10
hydrochloric acid, calcium oxide, calcium hydroxide,
sodium hydroxide, sulfuric acid, other)
Stability or Corrosion Control (calcium oxide, calcium__________
10
hydroxide, sodium carbonate, sodium
hexametaphosphate, other)
Coagulation & Flocculation Process
Chemical addition (1 point for each type of chemical_____________
1-5
coagulant added, maximum 5 points) (aluminum
Sulfate, bauxite, ferrous sulfate, ferric sulfate, calcium
oxide, bentonite, calcium carbonate, carbon dioxide,
Sodium silicate, other)
Rapid mix units
Mechanical mixers______________________________________
3
Injection mixers________________________________________
2
In-line blender mixers___________________________________
2
Flocculation tanks
Hydraulic flocculators___________________________________
2
Mechanical flocculators_________________________________
3
Clarification/Sedimentation Process
Horizontal flow (rectangular basins)___________________________
5
Horizontal flow (round basins)_______________________________
7
Upflow solids contact sedimentation__________________________
15
Inclined plate sedimentation_________________________________
10
Tube sedimentation_______________________________________
10
Dissolved air flotation______________________________________
20
Filtration Process
Single media filtration
Calcite chip____________________________________________
5
Granular activated carbon (GAC)___________________________
5
Other________________________________________________
5
Dual or mixed media filtration________________________________
5
Microscreens____________________________________________
5
Diatomaceous earth filters__________________________________
5
Cartridge filters___________________________________________
5
Slow sand filters__________________________________________
5
Direct filtration___________________________________________
10
Pressure or greensand filtration______________________________
15
3
Other Treatment Processes
Aeration________________________________________________
3
Packed tower aeration_____________________________________
5
Ion exchange/softening____________________________________
5
Lime-soda ash softening___________________________________
20
Copper sulfate treatment___________________________________
5
Powdered activated carbon_________________________________
5
15
Special Processes (reverse osmosis, electrodialysis, other)_______
Residuals Disposal
Discharge to lagoons______________________________________
5
Discharge to lagoons and then raw water source________________
8
Discharge to raw water_____________________________________
10
Disposal to sanitary sewer__________________________________
3
Mechanical dewatering_____________________________________
5
On-site disposal__________________________________________
5
Land application__________________________________________
5
Solids composting________________________________________
5
Facility Characteristics
Instrumentation
The use of SCADA or similar instrumentation systems__________
0
to provide data with no process operation
The use of SCADA or similar instrumentation systems__________
2
to provide data with limited process operation
The use of SCADA or similar instrumentation systems__________
4
to provide data with moderate process operation
The use of SCADA or similar instrumentation systems__________
6
to provide data with extensive or total process operation
Clearwell size less than average day design flow______________
5
TOTAL (sum of all POINTS)
CLASSIFICATION TYPE
CLASSIFICATION LEVEL (for Treatment Plants only)
Types
•SMALL WATER SYSTEM means a community water system or a non-transient
non-community water system that serves less than 1000 persons and has no
treatment or has only treatment which does not require any chemical treatment,
process adjustment, backwashing or media regeneration by an operator.
•TREATMENT PLANT
LEVEL
Class I
30 points or less
Class II
31 - 55 points
Class III
56 - 75 points
Class IV
76 points or greater
4
WATER TREATMENT DEFINITIONS
Ae r a t i o n
T h e p r o c e s s o f a d d i n g a i r t o wa t e r . A i r c a n b e a d d e d t o wa t e r b y p a s s i n g a i r t h r o u g h wa t e r o r p a s s i n g wa t e r
t h r o u g h a i r .
D i a t o m a c e o u s e a r t h f i l t e r s
F i l t e r t e c h n o l o g y u s i n g a t h i n l a ye r o f d i a t o m a c e o u s e a r t h ( a f i n e , si l i c e o u s m a t e r i a l ) t h a t i s d e p o s i t e d o n a
p o r o u s p l a t e t o s e r v e a s a f i l t e r . G o o d t e c h n o l o g y f o r s m a l l e r s ys t e m s b e c a u s e o f i t s r e l a t i v e s i m p l i c i t y o f
u n i t s a n d m a i n t e n a n c e r e q u i r e m e n t s .
D i r e c t f i l t r a t i o n
F i l t r a t i o n p r o c e s s wh e r e t h e s e d i m e n t a t i o n s t a g e o f c o n v e n t i o n a l f i l t r a t i o n i s o m i t t e d . F i l t r a t i o n i s p e r f o r m e d
d i r e c t l y a f t e r t h e f l o c c u l a t i o n s t a g e o f t r e a t m e n t . F i l t e r a i d i s u s u a l l y a d d e d b e f o r e f i l t r a t i o n .
D i s s o l ve d a i r f l o t a t i o n
P r o c e s s o f s o l i d s r e m o v a l wh e r e d i s s o l v e d a i r i s a d d e d t o t h e c l a r i f i e r f r o m t h e b o t t o m o f t h e b a s i n a n d t h e
a i r r a i s e s s u s p e n d e d p a r t i c l e s t o t h e t o p o f t h e wa t e r wh e r e t h e p a r t i c l e s a r e r e m o v e d b y s k i m m i n g .
E l e c t r o d i a l y s i s
P r o c e s s wh e r e b r a c k i s h wa t e r f l o ws b e t we e n a l t e r n a t i n g c a t i o n - p e r m e a b l e a n d a n i o n - p e r m e a b l e m e m b r a n e s .
A d i r e c t e l e c t r o n i c c u r r e n t p r o v i d e s t h e m o t i v e f o r c e t o c a u s e i o n s t o m i g r a t e t h r o u g h t h e m e m b r a n e s a n d
e i t h e r r e a c t t o c r e a t e a g a s o r r e m a i n i n a s e p a r a t e s o l u t i o n a s b r i n e wa s t e wa t e r .
H o r i z o n t a l - f l o w
F l o w o f wa t e r i n a h o r i z o n t a l d i r e c t i o n t h r o u g h a r e c t a n g u l a r o r r o u n d s e d i m e n t a t i o n / c l a r i f i c a t i o n b a s i n a s
o p p o s e d t o a v e r t i c a l o r u p wa r d f l o w t h a t wo u l d b e f o u n d i n a s o l i d s - c o n t a c t c l a r i f i e r .
I n j e c t i o n m i x e r s
U s e o f p e r f o r a t e d t u b e s o r n o z z l e s t o d i s p e r s e t h e c o a g u l a n t i n t o t h e wa t e r b e i n g t r e a t e d . P r o v i d e s u n i f o r m
d i s t r i b u t i o n o f t h e c o a g u l a n t o v e r t h e e n t i r e b a s i n . G e n e r a l l y s e n s i t i v e t o f l o w c h a n g e s a n d m a y r e q u i r e
f r e q u e n t a d j u s t m e n t s t o p r o d u c e t h e p r o p e r a m o u n t o f m i x i n g .
I n - l i n e b l e n d e r m i x e r s
U s e d f o r c o a g u l a n t m i x i n g wh e r e c o a g u l a n t i s a d d e d d i r e c t l y t o wa t e r b e i n g t r e a t e d t h r o u g h a d i f f u s e r i n a
p i p e . P r o v i d e s r a p i d d i s p e r s i o n o f t h e c o a g u l a n t wi t h o u t s i g n i f i c a n t h e a d l o s s . E n e r g y c o n s u m p t i o n i s l e s s
t h a n a c o m p a r a b l e m e c h a n i c a l m i x e r .
M e c h a n i c a l d e w a t e r i n g
T h e u s e o f m e c h a n i c a l d e v i c e s s u c h a s c e n t r i f u g e s a n d r o t a t i o n a l m e c h a n i s m s t o f o r c e t h e s e p a r a t i o n o f
s o l i d s ( s l u d g e ) f r o m l i q u i d s ( wa t e r ) .
M e c h a n i c a l m i x e r s
P a d d l e s , t u r b i n e s , a n d p r o p e l l e r s f r e q u e n t l y u s e d i n c o a g u l a t i o n f a c i l i t i e s . U s e s e l e c t r i c a l e n e r g y f o r m i x i n g
t h e c o a g u l a n t wi t h t h e wa t e r b e i n g t r e a t e d .
p H a d j u s t m e n t
T h e a l t e r a t i o n o f t h e p H o f t h e r a w wa t e r o r p r e f i n i s h e d wa t e r b y m e c h a n i c a l o r c h e m i c a l p r o c e d u r e s t o
e n h a n c e t h e p e r f o r m a n c e o f t h e t r e a t m e n t p r o c e s s .
R e ve r s e o s m o s i s
P a s s a g e o f wa t e r f r o m a c o n c e n t r a t e d s o l u t i o n t h r o u g h a s e m i p e r m e a b l e m e m b r a n e t o f r e s h wa t e r wi t h t h e
a p p l i c a t i o n o f p r e s s u r e .
S C AD A i n s t r u m e n t a t i o n
The Supervisory Control And Data Acquisition system is a computer-based system that monitors and controls remote water facility sites.
A SCADA master control is typically located in a dedicated control center or treatment plant control room. Remote sites are equipped
with remote terminal units to gather information and issue controls from the master station.
S o l i d s c o m p o s t i n g
M i x i n g o f s l u d g e wi t h d e c a y i n g o r g a n i c m a t e r i a l f o r e v e n t u a l u s e a s f e r t i l i z e r .
5
S t a b i l i t y o r c o r r o s i o n c o n t r o l
T h e r e m o v a l o f d i s s o l v e d g a s e s , t r e a t m e n t o f t h e f i n i s h e d wa t e r t o m a k e i t n o n c o r r o s i v e , a n d b u i l d i n g o f
p r o t e c t i v e c o a t i n g i n s i d e t h e p i p e .
T u b e s e d i m e n t a t i o n
T u b e s e t t l e r s o r h i g h r a t e s e t t l e r s a r e p l a c e d i n r e c t a n g u l a r o r c i r c u l a r b a s i n s . W a t e r e n t e r s t h e i n c l i n e d
s e t t l e r t u b e s a n d i s d i r e c t e d u p wa r d t h r o u g h t h e t u b e s . E a c h t u b e f u n c t i o n s a s a s h a l l o w s e t t l i n g b a s i n .
P a r t i c l e s c o l l e c t o n t h e i n s i d e s u r f a c e s o f t h e t u b e s o r s e t t l e t o t h e b o t t o m o f t h e b a s i n .
U p f l o w s o l i d - c o n t a c t s e d i m e n t a t i o n
U n i t wh i c h c o m b i n e s t h e c o a g u l a t i o n , f l o c c u l a t i o n , a n d s e d i m e n t a t i o n p r o c e s s e s i n t o a s i n g l e b a s i n , wh i c h i s
e i t h e r r e c t a n g u l a r o r c i r c u l a r i n s h a p e . F l o w i s a n u p wa r d d i r e c t i o n t h r o u g h a s l u d g e b l a n k e t o r s l u r r y o f
f l o c c u l a t e d , s u s p e n d e d s o l i d s .
U r b a n r u n o f f
D u r i n g d r y p e r i o d s , o i l , g r e a s e , g a s o l i n e , a n d o t h e r r e s i d u e s a c c u m u l a t e o n p a v e d s u r f a c e s . W h e n s t o r m s
b e g i n , t h i s m a t e r i a l i s wa s h e d i n t o l o c a l r e c e i v i n g wa t e r f r o m r o a d wa y s t o r m d r a i n a g e s y s t e m s . U r b a n
r u n o f f a l s o c o n t a i n s a n i m a l d r o p p i n g s f r o m p e t s a n d f er t i l i z e r s u s e d f o r l a n d s c a p i n g . C o n t r i b u t e s t o t a s t e
a n d o d o r c o m p l a i n t s .
6/5/96
Rev. 2/13/97 - Changed points for pressure or greensand filtration 20->15
Rev. 7/22/98 - Corrected point range for Class III
Rev. 7/26/04 – Included Small Water System Classification and changes to format