California Code of Regulations › Title 22 - Social Security › Division 4 - Environmental Health › Chapter 15 - Domestic Water Quality and Monitoring Regulations › Article 2 - General Requirements › Section 64413.1 - Classification of Water Treatment Facilities

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a) Each water treatment facility shall be
				  classified pursuant to Table 64413.1-A based on the calculation of total points
				  for the facility using the factors specified in subsection (b).
Table 64413.1-A. Water Treatment Facility Class
					 Designations
Total
								Points
Class
Less than 20
T1
20 through 39
T2
40 through 59
T3
60 through 79
T4
80 or more
T5
(b)
				  The calculation of total points for each water treatment facility shall be the
				  sum of the points derived in each of paragraphs (1) through (13). If a
				  treatment facility treats more than one source, the source with the highest
				  average concentration of each contaminant shall be used to determine the point
				  value in paragraphs (2) through (5).
(1) For
				  water source, the points are determined pursuant to Table 64413.1-B.
Table 64413.1-B. Points for Source Water Used by the
					 Facility
Type of source water used by the
								facility
Points
Groundwater and/or purchased treated water meeting
								primary and secondary drinking water standards, as defined in section
								116275
								of the Health and Safety Code
2
Water that includes any surface water or
								groundwater under the direct influence of surface water
5
(2)
				  For influent microbiological water quality, points shall be determined by using
				  the median of all total coliform analyses completed in the previous 24 months
				  pursuant to Table 64413.1-C:
Table 64413.1-C. Influent Water Microbiological
					 Quality Points
Median Coliform Density Most Probable
								Number Index (MPN)
Points
less than 1 per 100 mL
0
1 through 100 per 100 mL
2
greater than 100 through 1,000 per 100
								mL
4
greater than 1,000 through 10,000 per 100
								mL
6
greater than 10,000 per 100 mL
8
(3)
				  For facilities treating surface water or groundwater under the direct influence
				  of surface water, points for influent water turbidity shall be determined
				  pursuant to Table 64413.1-D on the basis of the previous 24 months of data,
				  except that if turbidity data is missing for one or more of the months, the
				  points given for turbidity shall be 5. The maximum influent turbidity sustained
				  for at least one hour according to an on-line turbidimeter shall be used unless
				  such data is not available, in which case, the maximum influent turbidity
				  identified by grab sample shall be used. For facilities that have not been in
				  operation for 24 months, the available data shall be used. For facilities whose
				  permit specifies measures to ensure that influent turbidity will not exceed a
				  specified level, the points corresponding to that level shall be assigned.
Table 64413.1-D. Influent Water Turbidity
					 Points
Maximum Influent Turbidity Level
								Nephelometric Turbidity Units (NTU)
Points
Less than 15
0
15 through 100
2
Greater than 100
5
(4)
				  The points for influent water perchlorate, nitrate, or nitrite levels shall be
				  determined by an average of the three most recent sample results, pursuant to
				  Table 64413.1-E.
Table 64413.1-E. Influent Water Perchlorate, Nitrate,
					 and Nitrite Points
Perchlorate, Nitrate, and Nitrite
								Data Average
Points
Less than or equal to the maximum contaminant
								level(MCL), as specified in Table 64431-A
0
For each contaminant greater than its
								MCL
5
(5)
				  The points for other influent water contaminants with primary MCLs shall be a
				  sum of the points for each of the inorganic contaminants (Table 64431-A),
				  organic contaminants (Table 64444-A) and radionuclides (Tables 64442 and
				  64443). The points for each contaminant shall be based on an average of the
				  three most recent sample results, pursuant to Table 64413.1-F. If monitoring
				  for a contaminant has been waived pursuant to sections
				  64432(m) or (n),
				  64432.2(c), or
				  64445(d), the
				  points shall be zero for that contaminant.
Table 64413.1-F. Influent Water Chemical and
					 Radiological Contaminant Points
Contaminant Data
								Average
Points
Less than or equal to the MCL
0
Greater than the MCL
2
5 Times the MCL or greater
5
(6)
				  The total points for surface water filtration treatment shall be the sum of the
				  points of those treatment processes utilized by the facility for compliance
				  with section
				  64652, pursuant to Table
				  64413.1-G.
Table 64413.1-G. Points for Surface Water Filtration
					 Treatment
Treatment
Points
Conventional, direct, or inline
15
Diatomaceous earth
12
Slow sand, membrane, cartridge, or bag
								filter
8
Backwash recycled as part of
								process
5
(7)
				  The points for each treatment process utilized by the facility and not included
				  in paragraph (6) that is used to reduce the concentration of one or more
				  contaminants for which a primary MCL exists, pursuant to Table 64431-A, Table
				  64444-A, and Tables 64442 and 64443, shall be 10. Blending shall only be
				  counted as a treatment process if one of the blended sources exceeds a primary
				  MCL.
(8) The points for each
				  treatment process not included in paragraphs (6), or (7) that is used to reduce
				  the concentration of one or more contaminants for which a secondary MCL exists,
				  pursuant to Tables 64449-A and 64449-B, shall be 3. Blending shall only be
				  counted as a treatment process if one of the blended sources exceeds a
				  secondary MCL.
(9) The points for
				  each treatment process not included in paragraphs (6), (7), or (8) that is used
				  for corrosion control or fluoridation shall be 3.
(10) The total points for disinfection
				  treatment shall be the sum of the points for those treatment processes utilized
				  by the facility for compliance with section
				  64654(a),
				  pursuant to Table 64413.1-H.
Table 64413.1-H. Points for Disinfection
					 Treatment
Treatment
								Process
Points
Ozone
10
Chlorine and/or chloramine
10
Chlorine dioxide
10
Ultra violet (UV)
7
(11) The points for disinfection/oxidation
				  treatment not included in paragraphs (6), (7), (8), or (10) shall be a sum of
				  the points for all the treatment processes used at the facility pursuant to
				  Table 64413.1-I.
Table 64413.1-I. Points for Disinfection/Oxidation
					 Treatment without Inactivation Credit
Treatment
								Process
Points
Ozone
5
Chlorine and/or chloramine
5
Chlorine dioxide
5
Ultra violet (UV)
3
Other oxidants
5
(12) The points for any other treatment
				  process that alters the physical or chemical characteristics of the drinking
				  water and that was not included in paragraphs (6), (7), (8), (9), (10), or (11)
				  shall be 3.
(13) The points for
				  facility flow shall be 2 per million gallons per day or fraction thereof of
				  maximum permitted treatment facility capacity, up to a maximum of 50 points;
				  except that for facilities utilizing only blending, the points shall be based
				  on the flow from the contaminated source and the dilution flow required to meet
				  the MCL(s) specified in Tables 64431-A, 64444-A, 64449-A, 64449-B, and Tables
				  64442 and 64443.