New Jersey Administrative Code
Title 7 - ENVIRONMENTAL PROTECTION
Chapter 10 - SAFE DRINKING WATER ACT
Subchapter 12 - STANDARDS FOR THE CONSTRUCTION OF PUBLIC NONCOMMUNITY WATER SYSTEMS AND NONPUBLIC WATER SYSTEMS
Section 7:10-12.33 - Chemical and physical treatment
Universal Citation: NJ Admin Code 7:10-12.33
Current through Register Vol. 56, No. 24, December 18, 2024
(a) General requirements for chemical and physical treatment are as follows:
1. A public noncommunity water system using a
surface water source is subject to the requirements of
N.J.A.C.
7:10-11.8, 11.12, 11.13 and 11.14.
2. Treatment facilities shall be capable of
producing water that meets the applicable State primary and/or secondary
drinking water regulations at N.J.A.C. 7:10-5 and 7.
3. Treatment units shall be of sufficient
capacity to produce the daily volumes of water required pursuant to
N.J.A.C.
7:10-12.7.
4. All filter shells, ion-exchange pressure
tanks and chemical solution feed drums shall be constructed of corrosion
resistant materials or contain non-corrodible liners.
5. Point of entry treatment (POET) devices
may be used to treat water in any public noncommunity or nonpublic water
system. The Department recommends that such devices be certified to meet
appropriate ANSI/NSF standards 42, 44, 53, 55, 58, and 62 as amended and
supplemented, or the equivalent. POET devices shall also meet ANSI/NSF Standard
61 if used in public noncommunity water systems. In addition, POET devices
shall meet the following requirements:
i.
Each device shall be equipped with sampling water taps before and after the
point at which treatment is applied;
ii. The manufacturer's specifications and the
owner's manual for operation and maintenance of each POET device shall be
available on-site at all times;
iii. The owner of the water system shall
conduct an efficiency test of the device upon its installation. The
administrative authority may require the owner of the public noncommunity water
system to conduct periodic water quality testing in addition to the quarterly
monitoring required under
N.J.A.C.
7:10-5.2(a)13 if the POET
device is installed to remove primary contaminants.
6. Wastewater resulting from the backwashing
or regeneration of filter media and/or ion exchange resin shall not be
discharged to a sanitary sewer system except in accordance with the New Jersey
Pollutant Discharge Elimination System rules, N.J.A.C. 7:14A, and with written
approval from the appropriate sewerage authority.
(b) Regulations for corrosion control are as follows:
1. pH adjustment for corrosion
control is recommended when the pH of the raw water is less than 6.5. The pH
adjustment system used for corrosion control shall be capable of raising the pH
to a minimum of 7.5 units.
2. A
neutralizing filter consisting of a bed of graded limestone may be used to
adjust pH.
3. Injection of alkaline
chemicals may be used to adjust pH only if the following conditions are met:
i. Only soda-ash, lime, or caustic soda shall
be fed by means of a positive displacement pump. Due to safety considerations,
the Department does not recommend using caustic soda in small water systems and
single dwelling water supply systems.
ii. Operation of the feed pump shall be
synchronized with the operation with the well pump.
iii. Safety equipment including respirator,
gloves, apron, shower and eye wash facilities shall be provided.
(c) Regulations for removal of iron and manganese are as follows:
1. Iron and manganese removal units shall
include an oxidizing process (natural precipitation or chemical precipitation)
followed by a filtration process.
2. Iron and manganese removal units which
include an open aeration process shall be designed and constructed so as to
minimize dust pickup. All air which enters the oxidizing unit shall pass
through a corrosion-resistant screen of not less than 24 mesh in order to
prevent the entry of insects. Forced air which enters the oxidizing unit shall
pass through air particulate filters.
3. Iron and manganese removal units which
include an ion exchange process (for example, water softening) shall be
designed and constructed such that the treated water will not contain a sodium
concentration in excess of 50 mg/l pursuant to N.J.A.C. 7:10-7. The treated
water shall not be softened to zero hardness. Potassium regenerant may be used
as an alternative to sodium regenerant.
(d) Packed column aeration (PCA) units or equivalent air strippers shall be capable of removing volatile organic compounds (VOCs) from at least twice the maximum levels found in the water to below the applicable MCLs. If the PCA unit is followed by a granular activated carbon (GAC) unit(s), the removal of VOCs may be achieved through the combined use of both treatment units.
1. Each air
intake on forced aeration or mechanically induced aeration systems must be
equipped with an air particulate filter.
2. Taps by which water can be sampled shall
be placed before and after the PCA unit.
(e) Granular activated carbon (GAC) units used for the removal of VOCs shall meet with the following requirements:
1. Each GAC unit shall have a minimum carbon
life (prior to VOCs breakthrough) of three months;
2. Taps by which water can be sampled shall
be placed before and after each GAC unit tank; and
3. Only virgin GAC shall be used, except
regenerated GAC may be used if such GAC was used previously only in potable
water treatment plants and regenerated in facilities used only for potable
water treatment plant filter media.
(f) Any type of water treatment not described in (a) through (e) above shall meet the requirements of N.J.A.C. 7:10-11.15, as applicable.
Disclaimer: These regulations may not be the most recent version. New Jersey may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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