# Docket Number: EPA-HQ-OPP-2010-0242

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United States Chemical Safety June 2010

Environmental Protection and Pollution Prevention

Agency (7510P)



# Chlorine Gas

Summary Document: Registration

Review

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# 3 of 69 

# TABLE OF CONTENTS

Chlorine Gas Registration Review Team ....................................................................... 4

I. PRELIMINARY WORK PLAN .................................................................................. 5

II. FACT SHEET ............................................................................................................ 16

III. GLOSSARY OF TERMS AND ABBREVIATIONS ...................................21

IV. APPENDIX A ............................................................................................................ 23

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# 4 of 69 Chlorine Gas Registration Review Team

Human Health & Environmental Effects

Tim McMahon

Srinivas Gowda

Risk Management

Monisha Harris

Lance Wormell

Office of General Counsel

Philip Ross

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# 5 of 69 I. PRELIMINARY WORK PLAN

Introduction

The Food Quality Protection Act (FQPA) of 1996 mandated a re gistration review

program. All pesticides distributed or sold in the United States generally must be

registered by the U.S. Environmental Protec tion Agency (USEPA, EPA, or the Agency),

based on scientific data showing that they will not cause unreasonable risks to human

health or the environment when used as di rected on product labe ling. The registration

review program is intended to make sure that , as the ability to assess risk evolves and as

policies and practices change, all registered pesticides continue to meet the statutory

standard of no unreasonable adverse effects to human health or the environment.

Changes in science, public policy, and pestic ide use practices will occur over time.

Through the registration review program, the Agency periodically r eevaluates pesticides

to make sure that as change occurs, products in the marketplace can be used safely.

Information on this program is provided at

http://www.epa.gov/oppsrr d1/registration_review/

.

The Agency is implementing the registration review program pursuant to Section

3(g) of the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) and will review

each registered pesticide every 15 years to de termine whether it continues to meet the

FIFRA standard for registration. The Agency will consider benefits information and data

as required by FIFRA. The public phase of re gistration review begins when the initial

docket is opened for each case. The docket is the Agency’s opportunity to state what it

knows about the pesticide and what additional risk analyses and data or information it

believes are needed to make a registrati on review decision. After reviewing and

responding to comments and data received in the docket during th is initial comment

period, the Agency will develop and commit to a final work plan and schedule for the

registration review of chlorine gas.

Chlorine gas, PC Code 020501, was first registered in the United States in 1948.

Currently there are 43 active chlorine gas pr oducts registered for pesticidal use; each

product lists chlorine at 99.5% active ingredient. The major use sites for chlorine gas

include commercial and industrial cooling towers (once-through and recirculating),

municipal water supplies and treatment pl ants, sewage and wastewater management

plants, pulp and paper mills, commercial and industrial swimming pools, agricultural

irrigation systems, and public water systems. Chlorine gas is also used as a chemical

reactant in the synthesis of chlorinated i norganic chemicals such as sodium and lithium

hypochlorite. These hypochlorite salts also have registered pesticidal uses including uses

on terrestrial food crops (for which tolera nce exemptions are listed in 40 CFR 180.1235

and 40 CFR 180.1054) as well as several other uses including swimming pool use. The

Agency published Reregistration Eligibility Decision documents (REDs) for sodium and

calcium hypochlorite in 1992 and for lith ium hypochlorite in 1993 that included

assessment of all registered uses for these hypochlorite salts.

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# 6 of 69 The Agency issued a Reregistration E ligibility Decision (RED) document for

chlorine February 1999. The RED can be located at:

http://www.epa.gov/pesticides /reregistration/status.htm

.

Risk Assessment Status & Anticipa ted Risk Assessment and Data Needs

Human Health Risk Assessment Status

The Agency has reviewed all the availa ble information on toxicology and human

exposure regarding chlorine ga s. The toxicology and exposur e databases for chlorine gas

are considered adequate. Therefore, the Agen cy anticipates that no additional toxicity or

exposure data will be needed for the ch lorine gas registration review case.

Further human health information is ava ilable in the document titled “Chlorine

Gas: Human Health Effects Scoping Docume nt for the Registration Review Decision,”

dated June 4, 2010.

Dietary and Drinking Wa ter Exposure and Risk

Dietary Food Exposure

Food exposure to chlorine gas and aqueous chlorine is not expected to occur

because there is not a reasonable expectation that residues significantly above naturally

occurring background levels would occur. Du e to the high reactivity and water solubility

of chlorine and chlorine salts, residues are also not expected to accumulate or

bioaccumulate in the food chain. Therefor e, a dietary food risk assessment is not

anticipated as being needed for chlorine gas in support of this registration review.

Dietary Drinking Water Exposure

The registered uses of chlorine gas and aqueous chlorine include disinfection of

municipal drinking water. The EPA's Office of Water has conducted a risk assessment

for the use of chlorine in di sinfection of municipal drinking water as well as disinfection

byproducts resulting from the use of chlorine in municipal drinki ng water disinfection

(Stage 1 Disinfectants and Disinfection B yproducts Rule (Stage 1 DBPR: 63 FR 69390 -

69476, December 16, 1998, Vol. 63, No. 241). As a result of this assessment, a

Maximum Residual Disinfectant Level of 4 mg /L for chlorine in municipal drinking

water was determined as a safe level for human exposure

(http://www.epa.gov/safewater/mdbp/dbp1.html). Maximum contaminant levels of

disinfection byproducts were also established as a result of th is assessment. As the other

registered uses of chlorine gas/aqueous chlo rine are not likely to result in contamination

of surface or groundwater, and as the EPA's Office of Water has already assessed the

drinking water use, the Office of Pestic ide Programs does not anticipate conducting a

drinking water assessment for chlorine gas/aqueous chlorine.

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# 7 of 69 Tolerances

There is a tolerance exemption for ch lorine gas (40 CFR 180.1095) “when used

preharvest or postharvest in solution on all raw agricultural commodities.” There are also

tolerance exemptions for both sodium hypochlorite (40CFR 180.1235) and calcium

hypochlorite (40CFR 180.1054).

Aggregate and Cumulative Exposure and Risk

In examining aggregate risk, the Agency takes into account the available and

reliable information concerning exposures to pesticide residues in food, drinking water,

and non-occupational pesticide expo sures. For the registered us es of chlorine gas, there

is no expectation that residues above background levels will o ccur to chlorine in the diet

from food contact or food uses. Therefore, th ere is no expectation that exposure in the

diet from food contact or food uses of chlori ne gas will result in an exposure that would

be considered in an aggregate risk assessmen t, because this level would be no different

than background levels that humans are exposed to on a daily basis. With respect to the

disinfection of municipal dri nking water, a maximum residual disinfectant level of 4mg/L

for chlorine residue has been established by the Agency’s Office of Water which has

been determined to be a safe level for human exposure. Th erefore, this exposure would

not contribute to an increased aggregate risk, as it has already been pointed out that there

is no increased dietary exposure over bac kground, and the drinking water disinfectant

level of 4 mg/L for chlorine had been determ ined to be a safe level for human exposure.

Together then, dietary and dr inking water exposures do not co ntribute to an increased

risk. Non-dietary residential de rmal and incidental oral e xposures could result from use

of chlorine gas in swimming pools. The Agen cy will need to consid er the magnitude of

these exposures, the health effects that have been reported from de rmal and incidental

oral exposures to chlorine, the dose levels at which these effects have been reported, and

the relationship of these eff ects to actual human exposures to determine whether an

aggregate assessment is appropriate. It shoul d be noted that use of proper application

methods and use of trained personnel in the use of chlorine gas would likely result in

minimal to no exposure from this use.

Section 408(b)(2)(D)(v) of FFDCA require s that, when considering whether to

establish, modify, or revoke a tolerance, th e Agency consider “available information”

concerning the cumulative effects of a part icular pesticide's residues and “other

substances that have a common mechanism of toxicity.” EPA has not yet determined

whether chlorine gas has a common mechan ism with other compounds; consequently, a

cumulative assessment will not be performed at this time.

Occupational and Residential Exposure and Risk

An occupational and/or residential exposur e assessment is required for an active

ingredient if (1) certain toxi cological criteria are triggere d and (2) there is potential

exposure to handlers (mixers, loaders, applicat ors, etc.) during use or to persons entering

treated sites after application is complete. Because chlorine gas is metered into water

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# 8 of 69 through closed systems in manufacturing proces ses or from large stationary containers

such as tank cars, tank trucks, and cylinders , the Agency believes that occupational and

post-application exposure to ch lorine gas, including exposur e of pool service operators

and bystanders is not significant provided prope r application methods are followed.

These application methods are presented in pamphlets published by the Chlorine

Institute, available at:

http://www.chlorineinstitute.org/Bookstor e/content.cfm?ItemNumber=3637&navItemNu

mber=3638).

Anticipated Physical/Chemical Property Data Needs

All product chemistry data requirements have been fulfilled for chlorine gas.

Therefore, it is anticipated that additional pr oduct chemistry data will not be needed for

the active ingredient chlorine gas.

Further information is available in the “Summary of Product Chemistry,

Environmental Fate, and Ecotoxicity Data for the Chlorine Gas Registration Review

Decision Document,” dated June 3, 2010.

Environmental Fate and Ecological Risk Assessment and Data Needs

The Agency has reviewed the environmental fate and ecological hazard databases

for chlorine gas. Based on its review, EPA be lieves risk assessments are needed to ensure

that the chlorine gas registration review cas e meets FIFRA standards. The Agency will

complete the environmental fate and ecological hazard risk assessments presented below.

• Environmental Fate

• Ecological hazard

• Endangered species assessment

Further information is available in the “Summary of Product Chemistry,

Environmental Fate, and Ecotoxicity Data for the Chlorine Gas Registration Review

Decision Document,” dated June 3, 2010.

The Agency needs to conduct ecological risk assessments for chlorine used in

once-through water cooling towers for control of microbiological gr owth and that likely

would be discharged into effluents and surface waters. Therefore, the Agency anticipates

needing ecotoxicity data for chlorine that is of potential concern for once-through water

cooling towers uses of chlorine. The followi ng ecotoxicity data are needed to conduct an

ecological risk assessment:

Anticipated Ecological Data Needs

o (GLN 850.4225) seedling emergence, Ti er II - dose response study on rice

( Oryza sativa );

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# 9 of 69 o (GLN 850.4250) vegetative vigor, Ti er II - dose response study on rice

( Oryza sativa );

o (GLN 850.4400) aquatic plant growth (a quatic vascular plant toxicity),

Tier II - dose response study on floating macrophyte Lemna gibba ; and

o (GLN 850.5400) aquatic plant growth (a lgal toxicity), Tier II - dose

response studies on ( Selenastrum capricornutum (green algae), Anabaena

flos- aquae (blue-green cyanobacteria), Navicula pelliculosa (freshwater

diatom), and Skeletonema costatum (marine diatom ).

Endangered Species

The Agency has not conducted a risk assessment that supports a complete

endangered species determination for chlori ne gas. The ecological risk assessment

planned during registration review will allow the Agency to determine whether chlorine

gas use has “no effect” or “may affect” fede rally listed threatened or endangered species

(listed species) or their designated critical ha bitats. When an assessment concludes that a

pesticide’s use “may affect” a listed species or its designated critical habitat, the Agency

will consult with the U.S. Fish and Wildlife Service and/or National Marine Fisheries

Services (the Services), as appropriate.

Incidents

The toxicological review of chlorine by the Agency for Toxic Substances and

Disease Registry (ATSDR, 2002) summarizes an extensive database regarding human

exposure to chlorine gas by the inhalation, oral, and dermal routes of exposure.

With respect to inhalation exposure, deat h from chlorine gas used as a chemical

weapon in World War I was noted. Causes ofdeath from this exposure were bronchopneumonia, lobar pneumonia, purulent pleurisy, and tuberculous meningitis. The

concentration of exposure causing death was not known in this circumstance. More

recent incidents involving exposure to chlorine gas as a result of rail car accidents in

which chlorine gas was released also did not note actual levels produc ing lethality, but as

noted in the ATSDR review, “P rater (1990) indicates that c oncentrations of 400 ppm can

be lethal to humans in 30 minutes and th at immediate death follows inhalation of a

concentration of 1,000 ppm. Concentr ations between 1,000 and 1,200 ppm for 30

minutes are lethal to humans according to a re view of earlier data from various American

authors by Withers and Lees (1985b).” As migh t be expected, the resp iratory tract is the

primary target of inhalation e xposure to chlorine gas, and to xicity resulting from such

exposure is manifest upon the tissues a nd organs of the respiratory tract.

From oral exposure, death in humans has been reported from ingestion of 200 mL

of a solution containing 3–6% chlorine (as sodium hypochlorite) (ATSDR, 2002).

Regarding accidental ingesti on, only minor effects on the ga strointestinal tract were

observed in data compiled by Pike et al. ( 1963), who reviewed 129 cas es of children who

ingested Clorox® and reported that no comp lications of consequences were found. Sixtyfive cases were examined by esophagoscopy within 96 hours of the ingestion and only 2

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# 10 of 69 showed evidence of esophageal injury. The children were between 12 month and 7 years

old and the amounts of bleach ingested rang ed from “1⁄2 ounce to 1 cup (ATSDR, 2002).

With respect to dermal exposure, the AT SDR review notes that “No studies were

located regarding respiratory, cardiovasc ular, gastrointestinal, hematological,

musculoskeletal, hepatic, renal, endocrine, and body weight effect s in humans or in

animals following dermal exposure to aqueous chlorine.” However, it is known that

dermal exposure to chlorine is extremely irritating to skin.

From OPP’s Incident Data System, th e following information was obtained on

chlorine gas. The reported routes of exposure for the 324 incident cases involving

chlorine gas-specific incidents were inhalation (99.7%), ocular (38%), and dermal (10%).

It should be noted that in many cases, more than one route of exposure applied for an

individual incident case (e .g., inhalation and ocular). The most common symptoms

reported for the routes of exposure are listed below:

• Inhalation exposure ( headache (26%), di fficulty breathing/shortness of breath

(24%), sore throat/throat irritation (22%), coughing (21 %), respiratory irritation

(14%), nausea (11%), ch est pain/tightness (10%), nasal irritation (8%),

asthma/wheezing (7%), vomiting (6%), and dizziness/lightheadedness (6%). In

many cases more than one symptom was reported for each exposure route.

• Ocular exposure (eye irri tation/burning/pain )(100%).

• Dermal exposure (skin irri tation/burning) (100%).

Aqueous Chlorine Related Incidents

The reported routes of exposure for the 17 incidence cases involving aqueous

chlorine incidents were inhalation (59%), ingestion (29%), dermal (18%) and ocular

(12%). It should be noted that in many cases , more than one route of exposure applied

for an individual incident case (e.g., inha lation and dermal). The most common

symptoms reported for the routes of exposure are listed below:

• Inhalation exposure (difficulty breathing/s hortness of breath (50%), respiratory

irritation (30%), skin irritation/burns (30 %), sore throat/throat irritation (20%),

digestive system irritation (20%), head ache (20%), coughing (20%), impaired

cognitive ability/psychologi cal effects (20%), nausea (6%), chest pain/tightness

(10%), nasal irritation (10%), asthma/w heezing (10%), dizziness/lightheadedness

(10%), and weakness (10%)). In many cases more than one symptom was

reported for each exposure route.

• Ingestion exposure (vomiting (100%), sore throat/throat irri tation (60%), and

digestive system irritation (20%)).

• Dermal exposure (skin irritation/burns (100%))

• Ocular exposure (eye irritation/burning/pain (100%)).

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# 11 of 69 Adverse Ecological Incidents

The Agency maintains a database system (Ecological Incident Information System or

EIIS) to track and evaluate accidental kills associated with pesticide use. The likelihood that

a particular pesticide caused the incident is classified as “highly probable”, “probable”,

“possible”, or “unlikely”, based on the information contained in the incident report. A

review of the 

# EIIS database for ecological incidents involving chlorine (PC Code 

# 020501 )

was completed on 05/12/2000. A summary of the results are presented below.

For chlorine, one incident report was filed in which unknown species of fish were

killed in a lake upon a spill of chlorine from a water treatment plant. The number of fish

killed were unknown. The certainty index was highly probable for the incident and a

substantial spill of chlorine will kill fish. The report was filed in 2000.

This incident data is consistent with the available acute toxicity data indicating that

chlorine is 

# very highly toxic to fish.

Timeline

EPA has created the following estimated time line for the completion of the chlorine gas

registration review:

Anticipated Schedule

Activities Estimated Month/Year

Phase 1: Opening the docket

Open Public Comment Period for Chlorine Gas Docket June 2010

Close Public Comment Period August 2010

Phase 2: Case Development

Develop Final Work Plan (FWP) November 2010

Issue DCI November 2011

Data Submission November 2012

Open Public Comment Period for Preliminary Risk Assessments March 2014

Close Public Comment Period June 2014

Phase 3: Registration Review Decision

Open Public Comment Period for Propos ed Reg. Review Decision September 2015

Close Public Comment Period December 2015

Final Decision and Begin Post-Decision Follow-up 2015

Total (years) 6

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# 12 of 69 Guidance for Commenters

The public is invited to co mment on EPA’s preliminary registration review work

plan and rationale. The Agency will caref ully consider all comments as well as any

additional information or data provided in a timely manner pr ior to issuing a final work

plan for the chlorine gas registration review case.

Trade Irritants

Through the registration review process, th e Agency intends to solicit information

on trade irritants and, to the extent feasible , take steps toward facilitating irritant

resolution. Growers and other stakeholders are asked to comment on any trade irritant

issues resulting from lack of Maximum Residue Limits (MRLs) or disparities between

U.S. tolerances and MRLs in key export ma rkets, providing as much specificity as

possible regarding the nature of the concern.

Water Quality

Chlorine gas is not identified as a cause of impairment for any water bodies listed

as impaired under section 303(d) of the Clean Water Act, based on information provided

at

http://iaspub.epa.gov/tmdl_waters10/attain s_nation_cy.cause_detail_303d?p_cause_grou

p_id=885 . In addition, no Total Maximum Daily Loads (TMDL) have been developed

for chlorine gas, based on information provided at

http://iaspub.epa.gov/tmdl_waters10/attain s_nation.tmdl_pollutant _detail?p_pollutant_gr

oup_id=885&p_pollutant_group_name=PESTICIDES . More information on impaired

water bodies and TMDLs can be found at http://www.epa.gov/owow/tmdl/ . The Agency

invites submission of water quality data for this pesticide. To the extent possible, data

should conform to the quality standards in Appendix A of the OPP Standard Operating

Procedure: Inclusion of Im paired Water Body and Other Water Quality Data in OPP’s

Registration Review Risk A ssessment and Management Process (see:

http://www.epa.gov/oppsrrd1/regist ration_review/water_quality_sop.htm ), in order to

ensure the data can be used quantitatively or qualitatively in pesticide risk assessments.

Environmental Justice

EPA seeks to achieve environmental justi ce, the fair treatment and meaningful

involvement of all people, regardless of race, color, national origin, or income, in the

development, implementation, and enforcemen t of environmental laws, regulations, and

policies. To help address potential envir onmental justice issues, the Agency seeks

information on any groups or segments of the population who, as a result of their

location, cultural practices, or other factor s, may have atypical, unusually high exposure

to chlorine gas compared to the general population. Please comment if you are aware of

any sub-populations that may have atypical , unusually high exposure compared to the

general population.

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# 13 of 69 Structure Activity Relationships

EPA must rely upon information of appropr iate quality and reliability for each

decision made by the Agency. In the Office of Pesticide Programs (OPP), the evaluation

process for a pesticide chemical traditionally begins with the appli cant’s submission of a

set of studies conducted with th e specific pesticide chemical of interest. The use of the

results of such testing (measured data) is a logical, scientifically rigorous process that

identifies the physical, chemical, and environmen tal fate properties of the pesticide, as

well as the dose and endpoints at which an adverse effect can occur in various animal

species.

Today, there is significant interest in a lternative techniques, i.e., techniques other

than data generation that could significan tly inform the Agency’s decision-making

process. Recently, OPP has made increasing use of structure activity relationship (SAR)

as part of its regulatory d ecision-making process. In th e SAR process, a chemical's

molecular structure is compared to that of other chemicals fo r which data are available.

These structural similarities are then us ed to make predictive judgments about a

chemical’s physical, chemical, and biological properties. Thus, the chemical’s physical,

chemical, and biological propertie s are a function of (o r directly related to) the chemical’s

molecular structure. Quantitative SAR is re ferred to as QSAR. To develop a QSAR, a

selected set of measured data on a single phys ical, chemical, or bi ological property is

used to derive a model (an equation) to predict the value of that property.

Since SAR assessments and QSAR modeli ng are another set of tools that are

available to Agency scientists, OPP has begun a process shift that envisions shifting from

the current study-by-study appro ach to an approach in which the use of predicted data,

generated using validated models, is cons idered along with information from open

literature and studies specifi cally generated under Part 161 requirements. All relevant

information would be considered as part of a weight-of-the-evidence evaluation.

At this time, EPA believes that for cert ain endpoints, especially physical/chemical

and fate properties, that SAR and QSAR might be effectively utilized to fulfill these data

requirements for many antimicrobial pesticide chemicals. When c onsidering biological

properties, at this time, EPA believes that SAR and QSAR can be most effectively

utilized in the evaluation of ch emicals that exhibit lower toxi city for human health and/or

ecotoxicity parameters. This is appropriate because the risk assessment for lower toxicity

chemicals can be stream-lined, i.e., a screen ing-level assessment pr ocedure rather than

multiple tiers of assessments with pr ogressively more data requirements.

If stakeholders believe that submission of predicted data can fulfill one of the data

needs for chlorine gas, then the Agency invites submission of this information. The

submitter would be expected to supply a rationa le describing the utility of the information

and provide documentation on the scientif ic validity of the information. The

determination that the predicted data fulfills the data requirement would be at the sole

discretion of the Agency. Pre-submission c onsultation with the Agency is encouraged.

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# 14 of 69 Endocrine Disruptor Screening Program

As required under FFDCA section 408(p) , EPA has developed the Endocrine

Disruptor Screening Program (EDSP) to dete rmine whether certain substances (including

pesticide active and other ingred ients) may have an effect in humans or wildlife similar to

an effect produced by a “natur ally occurring estrogen, or othe r such endocrine effects as

the Administrator may designate.” The EDSP employs a two-tiered approach to making

the statutorily required determinations. Tier 1 consists of a battery of 11 screening assays

to identify the potential of a chemical substa nce to interact with the estrogen, androgen,

or thyroid (E, A, or T) hormonal systems. Chemicals that go through Tier 1 screening and

are found to have the potential to interact with E, A, or T hormonal systems will proceed

to the next stage of the EDSP where EPA will determine which, if any, of the Tier 2 tests

are necessary based on the available data. Ti er 2 testing is designed to identify any

adverse endocrine related effects caused by th e substance, and esta blish a quantitative

relationship between the dose a nd the E, A, or T effect.

Between October 2009 and February 2010, EPA issued test orders/data call-ins

for the first group of 67 chemicals, which c ontains 58 pesticide ac tive ingredients and 9

inert ingredients. This list of chemicals was selected based on the potential for human

exposure through pathways such as food and wa ter, residential activity, and certain postapplication agricultural scenarios. This list should not be construed as a list of known or

likely endocrine disruptors.

Chlorine gas is not among the group of 58 pesticide active ingredients on the

initial list to be screened under the EDSP. Under FFDCA s ec. 408(p) the Agency must

screen all pesticide chemicals. Accordi ngly, EPA anticipates issuing future EDSP

orders/data call-ins for all Re gistration Review cases, incl uding those for which EPA has

already opened a Registration Review doc ket for a pesticide active ingredient.

For further information on the status of the EDSP, the policies and procedures, the

list of 67 chemicals, the test guidelines and the Tier 1 screening battery, please visit our

website: http://www.epa.gov/endo/

.

Additional Information

Stakeholders are also specifically asked to provide available information and data that

will assist the Agency in refining the risk assessments. The Agency is interested in

receiving the following information:

1. Confirmation on the following label information:

a. Sites of application

b. Formulations

c. Application methods and equipment

d. Maximum application rates

e. Frequency of application, a pplication intervals and maximum

number of applications

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# 15 of 69 f. Geographic limitations on use

2. Use or potential use distribution

3. Use history

4. Usage/use information for non-agricultu ral uses (e.g., materials preservation)

5. Typical application interval

6. State or local use restrictions

7. Ecological incidents (non-target plan t damage and avian, fish, reptilian,

amphibian and mammalian mortalities) not already reported to the Agency

8. Monitoring data

9. Structure Activity Relationships

Next Steps

After the 60-day comment period closes in August 2010, the Agency will review

and respond to any comments received in a timely manner, and then issue a Final Work

Plan for chlorine gas.

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# 16 of 69 II. FACT SHEET

Background Information

• Active Ingredient: Chlorine Gas

• Registration review case number: 4022

• PC Code: 020501

• CAS#: 7782-50-5

• Technical registrants: The Dow Chemi cal Co., PPG Industries, Inc., Pioneer

Americas, LLC, Canexus U.S., Inc., Chemical Formulators Inc., Olin

Corporation, and Brenntag Canada, Inc.

• First approved for use in a registered product: 1948

• Antimicrobials Division Chemical Revi ew Manager (CRM): Monisha Harris,

harris.monisha@epa.gov

• Antimicrobials Division Product Manager (PM): Wanda Henson,

henson.wanda@epa.gov

Chemical Identity/Structure:

Cl-Cl

Use & Usage Information

• Chlorine gas is an antimicrobial pesticid e registered for use as a disinfectant,

sanitizer, microbiocide, microbiostat, and algaecide in a wide variety of

applications.

• Antimicrobial Use Sites: pulp/paper mill water systems, commercial/industrial

recirculating water cooling systems, sewage systems, swimming pool water

systems, ornamental ponds/aquaria, human drinking water systems, food

processing water systems, egg handling eq uipment, egg plants, hatcheries, and

brooder rooms.

Recent Regulatory Actions

A Reregistration Eligibilit y Decision (RED) for chlorine gas was issued in

February 1999.

Human Health Risk Assessment Status

The Agency does not antici pate requiring additional human health data for

chlorine gas or aqueous chlorine. Uses of chlorine gas in food and food contact scenarios

are not reasonably expected to result in resi dues of chlorine above background levels, and

EPA has established a tolerance exemption fo r the use of chlorine gas (40 CFR 180.1095)

“when used preharvest or postharvest in solution on all raw agricultural commodities.”

Use of chlorine as a drinking water disinf ectant has been assessed for safety by EPA's

Office of Water, and the 4mg/L level establishe d has been determined to be a safe level

for human exposure. Occupational and post-ap plication exposure from use of chlorine

gas is not expected to result in significant exposure when use directions are followed, as

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# 17 of 69 noted in the Chlorine Institute's published pamphlets on the safe use of chlorine gas

(http://www.chlorineinstitu te.org/Bookstore/content.cf m?ItemNumber=3637&navItemN

umber=3638)

Further human health information is ava ilable in the document titled “Chlorine

Gas: Human Health Effects Scoping Docume nt for the Registration Review Decision,”

dated June 4, 2010.

Product Chemistry Database Status

The Agency has reviewed the product chem istry database for the chlorine gas

registration review case and an ticipates that no additional pr oduct chemistry data will be

needed for registration review because all pr oduct chemistry data requirements have been

satisfied.

Further information is available in the “Summary of Product Chemistry,

Environmental Fate, and Ecotoxicity Data for the Chlorine Gas Registration Review

Decision Document,” dated June 3, 2010.

Environmental Fate & Ecologi cal Risk Assessment Status

The Agency will conduct environmental fate and ecological risk assessments for

chlorine gas. Prior to conducting the risk assessment, the Agency anticipates requiring

additional data.

The Agency has not conducted a risk assessment that supports a complete

endangered species determination for chlori ne gas. The ecological risk assessment

planned during registration review will allow the Agency to determine whether chlorine

gas use has “no effect” or “may affect” fede rally listed threatened or endangered species

(listed species) or their designated critical ha bitats. When an assessment concludes that a

pesticide’s use “may affect” a listed species or its designated critical habitat, the Agency

will consult with the U.S. Fish and Wildlife Service and/or National Marine Fisheries

Services (the Services), as appropriate.

Further information is available in the “Summary of Product Chemistry,

Environmental Fate, and Ecotoxicity Data for the Chlorine Gas Registration Review

Decision Document,” dated June 3, 2010.

Tolerances

Chlorine gas is exempt from the requireme nt of a tolerance when used pre-harvest

or post-harvest in solution on all ra w agricultural commodities (40 CFR §180.1095).

# Docket Number: EPA-HQ-OPP-2010-0242

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# 18 of 69 Data Call-In Status

A Generic Data Call-In (GDCI) for chlo rine was issued in March 1999 (data

requirements satisfied). A Pr oduct-Specific Data Call-In (PDCI) for chlorine was issued

in February 1999 (data requirements satisfied). The Agency anticipates issuing a data

call-in (DCI) for chlorine gas to support the registration review risk assessment process.

Labels

There are 43 registered produc ts that contain chlorine gas. The EPA Registration

Numbers are provided in Table 1 below. For future reference, duri ng registration review

a list of product registration numbers will be in cluded in the docket. Product registration

labels may be obtained from the Pesticid e Product Label System (PPLS) website at:

http://oaspub.epa.gov/pestlabl/ppls.home

.

Table 1. Registered Active Products of Chlorine Gas

Registration # Registration Name Company Name Formulation

Type % of

Active

Ingredient

148-707 Liquid Chlorine Harcros Chemicals

Inc. Pressurized Gas 99.5

266-35 Hill Brothers Chlorine Hill Brothers

Chemical Co. Pressurized Gas 99.5

464-99 Chlorine The Dow Chemical

Co. Technical

Chemical 99.5

550-200 Chlorine Univar USA Inc. Pressurized Gas 99.5

748-31 Liquid Chlorine (Under

Pressure) PPG Industries, Inc Technical

Chemical 99.5

813-10 Chlorine DPC Industries, Inc. Pressurized Gas 99.5

935-8 Chlorine Liquified Gas Occidental Chemical

Corporation Formulation

Intermediate 99.5

1744-10 Sunny Sol Chlorine JCI Jones Chemicals,

Inc. Pressurized Gas 99.5

2686-3 Liquid Chlorine Hydrite Chemical Co. Pressurized Gas 99.5

2792-61 Decco 240 Liquid

Chlorine Decco, Cerexagri,

Inc. Pressurized Gas 99.5

6785-1 Compressed Chlorine Gas Brenntag Mid-South,

Inc. Pressurized Gas 99.5

7151-4 Chlorine Alexander Chemical

Corp Pressurized Gas 99.5

7870-2 Chlorine Hawkins Inc. Pressurized Gas 99.5

# Docket Number: EPA-HQ-OPP-2010-0242

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# 19 of 69 8996-6 Chlorine Liquified Gas

Under Pressure Sierra Chemical Co. Pressurized Gas 99.5

9768-21 Liquid Chlorine Thatcher Co. Pressurized Gas 100

33458-1 Compressed Chlorine Gas Allied Universal

Corp. Pressurized Gas 99.5

35317-2 Compressed Chlorine Gas Kuehne Chemical

Company, Inc. Pressurized Gas 99.5

37982-2 Chlorine Gas Pioneer Americas,

LLC Pressurized Gas 99.5

37982-39 Chlorine Liquefied Gas

Under Pressure

Manufacturing Use

Product Pioneer Americas,

LLC Technical

Chemical 99.5

41209-4 Chlorine Liquified Gas South Texas

Chlorine, Inc. Pressurized

Liquid 99.5

43407-1 Chlorine-Liquefied Gas California Int'l

Chemical Co, Inc. Pressurized Gas 99.5

45849-1 Chlorine Liquified Gas

Under Pressure Pool Chlor Inc. Technical

Chemical 99.5

45851-1 Chlorine Pool Chlor Of

Nevada, Inc. Pressurized Gas 99.5

50956-6 Chlorine Erco Worldwide Pressurized Gas 99.5

52134-1 Chlorine Liquified Gas

Under Pressure Pool Chlor Of

Arizona Inc. Pressurized Gas 99.5

52374-12 Chlorine Brenntag Southwest,

Inc. Pressurized Gas 99.5

56410-1 Liquefied Chlorine Gas

Under Pressure Riveroaks Chemical

Company Pressurized Gas 99.5

56572-2 Chlorine Gas Splash Pool

Chemicals, Inc. Pressurized Gas 99.5

56652-1 Chlorine Gas (Liquefied

Under Pressure) Non

Flammable Poolman Pressurized Gas 99.5

57101-1 Chlorine Liquified Gas

Under Pressure Rainbow Pool

Service & Repair Pressurized Gas 99.5

58618-1 Chlorine Liquefied Gas

Under Pressure Sun Coast Pool

Chemical Pressurized Gas 99.5

58687-1 Chlorine-- Liquified Gas

Under Pressure Georgia Gulf

Chemicals And

Vinyls, LLC Pressurized Gas 99.9

# Docket Number: EPA-HQ-OPP-2010-0242

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# 20 of 69 63802-1 Chlorine US Magnesium LLC Ready-to-Use

Solution 99.7

67649-5 Chlorine SG Rowell Chemical

Corp. Pressurized Gas 99.5

67799-1 Seachlor 100 Seaco Technologies,

Inc. Pressurized Gas 99.5

69874-4 Chlorine Canexus U.S., Inc. Pressurized Gas 99.9

69874-5 Chlorine-Manufacturing

Use Canexus U.S., Inc. Technical

Chemical 99.9

70264-1 Chlorine Altivia Corporation Solid Agar 99.5

70529-1 Chlorine Gas Chemical

Formulators Inc. Technical

Chemical 99.5

72315-1 Olin Chlorine Olin Corporation Technical

Chemical 99.5

81987-1 Chlorine Liquefied Gas

Under Pressure California Water

Services Ready-to-Use

Solution 99.5

84043-1 Liquid Chlorine Equa-Chlor, Inc. Pressurized Gas 99.9

86027-3 Chlorine Brenntag Canada,

Inc. Technical

Chemical 99.9

# Docket Number: EPA-HQ-OPP-2010-0242

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# 21 of 69 III. GLOSSARY of TERMS & ABBREVIATIONS

ai Active Ingredient

AR Anticipated Residue

ASTM American Society for Testing and Materials

AWPA American Wood Preserver’s Association

CFR Code of Federal Regulations

cPAD Chronic Population Adjusted Dose

CSF Confidential Statement of Formula

CSFII USDA Continuing Surveys for Food Intake by Individuals

DCI Data Call-In

DEEM Dietary Exposure Evaluation Model

DFR Dislodgeable Foliar Residue

DNT Developmental Neurotoxicity

DWLOC Drinking Water Level of Comparison

EC Emulsifiable Concentrate Formulation

EDWC Estimated Drinking Water Concentration

EEC Estimated Environmental Concentration

EPA Environmental Protection Agency

EUP End-Use Product

FDA Food and Drug Administration

FIFRA Federal Insecticide, Fungicide, and Rodenticide Act

FFDCA Federal Food, Drug, and Cosmetic Act

FQPA Food Quality Protection Act

FOB Functional Observation Battery

GENEEC Tier I Surface Water Computer Model

IR Index Reservoir

LC 50 

# Median Lethal Concentration. A statistically derived concentration of a

substance that can be expected to cause death in 50% of test animals. It is

usually expressed as the weight of substance per weight or volume of water, air

or feed, e.g., mg/l, mg/kg or ppm.

LD 50 

# Median Lethal Dose. A statistically deri ved single dose that can be expected to

cause death in 50% of the test animals when administered by the route indicated

(oral, dermal, inhalation). It is expressed as a weight of substance per unit

weight of animal, e.g., mg/kg.

LOC Level of Concern

LOAEL Lowest Observed Adverse Effect Level

μg/g Micrograms Per Gram

μg/L Micrograms Per Liter

mg/kg/day Milligram Per Kilogram Per Day

mg/L Milligrams Per Liter

MOE Margin of Exposure

MRID Master Record Identifi cation (number). EPA's system of recording and tracking

submitted studies.

MUP Manufacturing-Use Product

NA Not Applicable

NAWQA USGS National Ambient Water Quality Assessment

NPDES National Pollutant Discharge Elimination System

NR Not Required

NOAEL No Observed Adverse Effect Level

OPP EPA Office of Pesticide Programs

OPPTS EPA Office of Prevention, Pesticides and Toxic Substances

PAD Population Adjusted Dose

PAIRA Pure Active Ingredient Radiolabelled

PCA Percent Crop Area

PDP USDA Pesticide Data Program

# Docket Number: EPA-HQ-OPP-2010-0242

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# 22 of 69 PHED Pesticide Handler's Exposure Data

PHI Preharvest Interval

ppb Parts Per Billion

PPE Personal Protective Equipment

ppm Parts Per Million

PRZM/EXAMS Tier II Surface Water Computer Model

Q 1 

# * The Carcinogenic Potential of a Compound, Quantified by the EPA's Cancer

Risk Model

RAC Raw Agriculture Commodity

RED Reregistration Eligibility Decision

REI Restricted Entry Interval

RfD Reference Dose

RQ Risk Quotient

SCI-GROW Tier I Ground Water Computer Model

SAP Science Advisory Panel

SF Safety Factor

SLN Special Local Need (Registrati ons Under Section 24©) of FIFRA)

TGAI Technical Grade Active Ingredient

TEP Typical End-Use Product

USDA United States Department of Agriculture

UF Uncertainty Factor

WPS Worker Protection StandardDocket Number: EPA-HQ-OPP-2010-0242www.regulations.gov23 of 69IV. APPENDIX AUse Patterns for Chlorine GasUse Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsIndustrial Processes and Water SystemsMunicipal Water Supplies,Sewage and WastewaterManagement PlantsPressurizedGas266-358996-6TechnicalChemical748-31DispensingEquipmentNot Listed Only specificallydesigned dispensing equipmentshould be used in accordance with the manufacturer’sinstructions and according tostate regulatory agencyrecommendations for dosages or residual chlorinelevels which should be maintained for each specificsite of application.Municipal Water Supplies,Sewage and WastewaterManagement Plants, CoolingSystems, Paper Mills, andRepacking Portable CylindersPressurizedGas148-707TechnicalChemical72315-1DispensingEquipmentNot Listed New York use only. Only specifically designeddispensing equipment should be used in accordancewith the manufacturer’s instructions and according tostate regulatory agencyrecommendations for dosagesor residual chlorine levels which should be maintainedfor each specific site of application. Re-packagers mustobtain their own registration with the EPA.Municipal Water Supplies andTreatment Plants, Sewage andWastewater ManagementPlants, Water Cooling Systems,Industrial and CommercialCooling Systems, Pulp andPaper Mills and Repackaginginto Portable CylindersPressurizedGas5382-3835317-250956-6TechnicalChemical41209-4Ready to Use63802-1Solid AgarDispensingEquipmentNot Listed Only specifically designed dispensing equipmentshould be used in accordance with the manufacturer’sinstructions and according tostate regulatory agencyrecommendations for dosages or residual chlorinelevels which should be maintained for each specificsite of application. Re-packagers must obtain their ownregistration with the EPA.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov24 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse Limitations70264-1PressurizedGas7870-2DispensingEquipmentRefer to the appropriate ChlorineInstitute Pamphlet forinstructions on the requiredproduct use and safetyprocedures.Never tamper with fusible plugs or attempt to alter orrepair cylinders, tons or valves. This product, includingdispensing equipment, must be handled and used inaccordance with the practices specified by allapplicable product labeling and the appropriateChlorine Institute Pamphlet.Municipal Water Supplies,Sewage and WastewaterManagement Plants, WaterCooling Systems and PaperMillsPressurizedGas58687-1DispensingEquipmentNot Listed Only specifically designed dispensing equipmentshould be used in accordance with the manufacturer’sinstructions and according tostate regulatory agencyrecommendations for dosages or residual chlorinelevels which should be maintained for each specificsite of application.This product cannot be transferred to portablecylinders. Pool service operators with portablecylinders must obtain their own registrations with theEPA.Municipal Water Supplies,Sewage and WastewaterManagement Plants, Used inProduction of Bleach, Plastics,Chlorinated Solvents,Refrigerants and Intermediatesfor Products Containing noChlorineFormulationIntermediate935-8DispensingEquipmentNot ListedProvide special training toworkers handling chlorine.Protect from physical damage. Regularly test andinspect piping and containment used for chlorineservice. Liquid levels should be 85% of tank cylindercapacity. Use in well ventilated area.Municipal Water Supplies,Sewage and WasteManagement Plants ,Recirculating Cooling Water inIndustrial Cooling Systems,Paper Mills and OtherIndustrial ApplicationsPressurizedGas550-2006785-1DispensingEquipmentRefer to the Chlorine Manualpublished by the ChlorineInstitute for instructions on therequired product use andprocedures.Connection of containers discharging liquid to amanifold is not recommended. Never connect to a gasmanifold a new container that is not the sametemperature as other containers connected in thesystem.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov25 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsMunicipal Water Supplies,Sewage and WasteManagement Plants ,Recirculating Cooling Water inIndustrial Cooling Systems,Paper Mills and OtherIndustrial Applications(Continued)PressurizedGas550-2006785-1DispensingEquipmentUsing Chlorine in Containers(See Diagrams 1-4) Connectingand Disconnecting:Use 500Psig Copper Tubing filtered withspecial adapter (4-A Cylinder 4-B for Ton Container) to connectcontainer to piping system.To connect line to containerremove valve protection hood.(1) Check to ensure cylindervalve is closed: valve closesclockwise. Adjustpacking nut to1⁄4 to 1⁄2 turn past hand tight.Then use the wrench to attachtubing valve with yoke. Use newgasket supplied with containereach time connection is made.Make sure connections are tight.Close auxiliary valve, opencylinder valve one half turncounterclockwise and then closeimmediately. Test for leaks withammonia vapor. Appearance ofwhite vapor indicates a chlorineleak.If a yoke is indicative tightenyoke and retest. If leak persistsremove gasket and replace witha new gasket. Retest using theabove procedure.Connection of containers discharging liquid to amanifold is not recommended. Never connect to a gasmanifold a new container that is not the sametemperature as other containers connected in thesystem.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov26 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsMunicipal Water Supplies,Sewage and WasteManagement Plants ,Recirculating Cooling Water inIndustrial Cooling Systems,Paper Mills and OtherIndustrial Applications(Continued)PressurizedGas550-2006785-1DispensingEquipmentIf no leaks are detected, openauxiliary valve one turn andcylinder valve one turn.Disconnection:To disconnectclose cylinder valve. Closeauxiliary valve. Disconnecttubing and yoke. Test for leaks.Apply valve outlet cap withgasket and tighten. Replacevalve protection hood oncontainer. Plug or cap the openend of the chlorine lineimmediately to keep outmoisture.Connection of containers discharging liquid to amanifold is not recommended. Never connect to a gasmanifold a new container that is not the sametemperature as other containers connected in thesystem.Municipal Water Supplies,Sewage and WastewaterManagement PlantsPressurizedGas7151-4DispensingEquipmentUsing Chlorine in Cylinders,See Diagrams 1-4Connectingand Disconnecting:Use 500psig copper tubing fitted withspecial adapter (4-A) to connectcontainers to piping system. Toconnect line to containers,remove valve protection hood(1) and valve outlet cap (2-A).Then use wrench (3) shown toattach tubing to valve with yoke(4-B). Use new gasket suppliedwith cylinder each timeconnection is made. Make sureconnections are tight. Check forleaks with ammonia vapor.Handle and use only in accordance with practicerecommended in the Chlorine Manual published by theChlorine Institute. Only specifically designeddispensing equipment should be used in accordancewith the manufacturer’s instructions and according tostate regulatory agencyrecommendations for dosagesor residual chlorine levels which should be maintainedfor each specific site of application.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov27 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPressurizedGas7151-4DispensingEquipmentAppearance of white vaporindicates Chlorine leak. Neveruse standard pipe fittings.Handle and use only in accordance with practicerecommended in the Chlorine Manual published by theChlorine Institute. Only specifically designeddispensing equipment should be used in accordancewith the manufacturer’s instructions and according tostate regulatory agencyrecommendations for dosagesor residual chlorine levels which should be maintainedfor each specific site of application.Municipal Water Supplies,Sewage and WastewaterManagement Plants(Continued)PressurizedGas33458-1TechnicalChemical70529-1DispensingEquipmentGeneral Instructions:Chlorinecylinders have one valve andwill deliver gas chlorine in theupright position. Ton containershave to valves in one head: inthe horizontal position withvalves in a vertical line the willdeliver gas from upper valve andliquid from lower valve.Connecting andDisconnecting:Use 500 psigcopper tubing fitted with specialadapter to connect container topiping system. To connect lineto container, remove valveprotection cap and valve outletcap. Then use wrench shown toattach tubing to valve with yoke.Use new gasket supplied withcontainer each time connectionis made. Make sure connectionsare tight. Check for leaks withammonia vapor. Never useNew York use only. Use in well ventilated areas.Connection of containers discharging liquid to amanifold is not recommended. Never connect to amanifold a new container that is not at the sametemperature as other containers connected to thesystem. Never heat chlorine containers or valves. Donot place them in hot water bath to increase dischargebates. Be sure no water or other liquid is sucked backinto container due to pressure differences especiallywhen it is nearly empty. Never leave container valvesopen when chlorine is not being used.Handle and use only in accordance with practicerecommended in the Chlorine Manual published by theChlorine Institute.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov28 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsMunicipal Water Supplies,Sewage and WastewaterManagement Plants(Continued)PressurizedGas33458-1TechnicalChemical70529-1DispensingEquipmentstandard pipe fittings.Turn stem one full turncounterclockwise to open valve.Do not use container valve toregulate the chlorine. Use ofvalve for flow control may wearvalve seat so that it cannot betightly closed. Never force thevalve stem. Hit wrench handlewith the heel of the hand toloosen a stuck valve stem. Neveruse a hammer or otherimplements for this purpose.Packing may be loosenedslightly to relieve tight stem, butretighten to avoid leak.To disconnect, close valve, testvalve for leaks, apply valveoutlet cap with gasket andprotection hood. Plug or cap theopen end of the chlorine lineimmediately to keep outmoisture.New York use only. Use in well ventilated areas.Connection of containers discharging liquid to amanifold is not recommended. Never connect to amanifold a new container that is not at the sametemperature as other containers connected to thesystem. Never heat chlorine containers or valves. Donot place them in hot water bath to increase dischargebates. Be sure no water or other liquid is sucked backinto container due to pressure differences especiallywhen it is nearly empty. Never leave container valvesopen when chlorine is not being used.Handle and use only in accordance with practicerecommended in the Chlorine Manual published by theChlorine Institute.Municipal Water Supplies,Sewage and WastewaterManagement Plants andIndustrial Water TreatmentSystemsPressurizedGas69874-484043-1DispensingEquipmentThis product includingdispensing equipment must behandled and used in accordancewith the practices specified byall applicable product labelingand the Chlorine Manualpublished by the ChlorineRefer to the Chlorine Manual published by theChlorine Institute for instructions on safety procedures.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov29 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsInstitute.Potable and WastewaterTreatment, Repacking intoSmaller ContainersPressurizedGas67649-5DispensingEquipmentUsing Chlorine in Containers:Connecting and Disconnecting:Use a special adapter (4-A) toconnect container to a pipingsystem. To connect line tocontainer, remove valveprotection hood. (1-A) and valveoutlet cap (2-A). Then use thewrench (3) shown to attachtubing to valve with yoke (4-B).Use a new gasket with each timea connection is made. Make sureconnections are tight. Check forleaks with ammonia vapor.Appearance of white vaporindicates a chlorine leak. Neveruse standard pipe fittings.Turn the stem on full turncounterclockwise to open valve(2). Don’t use container valve(2) to regulate chlorine flow.Use of valve for flow controlmay wear valve seat so that itcannot be tightly closed. Neverforce the valve stem. Hit wrenchhandle with the heel of the handto loosen a stuck valve stem.Never use a hammer or otherimplements for this purpose.Packaging nut may be loosenedslightly to relieve tight stem, butretighten promptly to avoid leak.The registrant is solely responsible for the safety of theservicing equipment, and for the repackaging of thisgas from larger containers into portable cylinders andton containers. Each re-packager must obtain its ownEPA registration number for this pesticide for this useand its own EPA Establishment Number from the EPA.Re-packagers may only dispense this product toportable containers that are approved for chlorine andare appropriately labeled.Refer to the appropriate Chlorine Institute Pamphlet forinstructions on the required product use and safetyprocedures.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov30 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPotable and WastewaterTreatment, Repacking intoSmaller Containers (Continued)PressurizedGas67649-5DispensingEquipmentTo disconnect, close valve (2),disconnect yoke and adapter (4-A&4-B), test valve for leaks,apply valve outlet cap (2-A) withgasket. Replace valve protectionhood (1) on container. Plug orcap the open end of chlorine lineimmediately to keep outmoisture.The registrant is solely responsible for the safety of theservicing equipment, and for the repackaging of thisgas from larger containers into portable cylinders andton containers. Each re-packager must obtain its ownEPA registration number for this pesticide for this useand its own EPA Establishment Number from the EPA.Re-packagers may only dispense this product toportable containers that are approved for chlorine andare appropriately labeled.Refer to the appropriate Chlorine Institute Pamphlet forinstructions on the required product use and safetyprocedures.Sewage and Waste WaterTreatmentPressurizedGas37982-252374-12Flash MixMixing:It is imperative that theproduct and wastewater beinstantaneously and completelyflash mixed to assure reactionwith every chemical active,soluble and particulatecomponent of wastewater.Contacting:Upon flash mixing,the flow through the systemmust be maintained.Dosage/Residual Control:Successful disinfection isextremely dependent onresponse to fluctuating chlorinedemand to maintain apredetermined, desirablechlorine level. Secondaryeffluent should contain 0.2 to 1.0The disinfect ion of sewage and effluent must beevaluated by determining that the total number ofcoliforn bacteria and/or fecal coliform bacteria asdetermined by the Most Probable Number (MPN)procedure, of the chlorinated effluent has been reducedto or below the maximum permitted by the controllingregulatory jurisdiction.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov31 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPressurizedGas37982-252374-12Flash Mixppm chlorine residual after a 15to 30 minute contact time.A reasonable average of residualchlorine is 0.5 ppm after 15minutes contact time.Effluent Slime Control:Applya 100 to 1,000 ppm availablechlorine solution at a locationwhich will allow completemixing. Once control hasbecome evident apply 15 ppmavailable chlorine solution.Filter Beds and Slime Control:Remove filter from service anddrain. Prepare a 100 to 1,000ppm available chlorine solutionand fill a depth of 1 foot abovefilter sand. Wait 30 minutesbefore draining water to a levelthat is even with the top of thefilter. Wait 4 to 6 hours beforecompletely drainingbackwashing filter.The disinfect ion of sewage and effluent must beevaluated by determining that the total number ofcoliforn bacteria and/or fecal coliform bacteria asdetermined by the Most Probable Number (MPN)procedure, of the chlorinated effluent has been reducedto or below the maximum permitted by the controllingregulatory jurisdictionSewage and Waste WaterTreatment (Continued)PressurizedGas37982-39Not Listed Refer to the “Chlorine Manualpublished by the ChlorineInstitute, Inc. for instructions onthe required product use andsafety procedures.Before working with this product, handlers must betrained how to appropriately use respirators thatconforms to OSHA requirements and how toappropriately handle and use chlorine.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov32 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPulp and Paper Process WaterSystems, Potable andWastewater Treatment, CoolingTower Water Treatment (ForRepackaging into SmallerContainers or for theManufacture of SodiumHypochlorite)TechnicalChemical464-99PressurizedGas813-101744-10DispensingEquipmentRefer to the appropriate ChlorineInstitute pamphlet forinstructions and the requiredproduct use and safetyprocedures.This product including dispensing equipment must behandled and used in accordance with the practicesspecified by all appropriate product labeling and theappropriate CI pamphlet.Pulp and Paper Mill ProcessWater Systems, Cooling Tower,Air Washer and EvaporativeCondenser Water, Pasteurizer,Warmer and Cannery CoolingWater Systems IncludingChillersPressurizedGas37982-252374-12Slug Feed,Intermittent Feedand ContinuousFeedSlug Feed Method/InitialDose:When system isnoticeably fouled applysufficient chlorine to obtain from5 to 10 ppm available chlorine.Repeat until control is achieved.Badly fouled systems must becleaned before initial treatment.Subsequent Doses:Whenmicrobial controls becomesevident, test daily and maintain a1 ppm residual.Intermittent Feed Method:Initial Dose:When system isnoticeably fouled, applysufficient chlorine to obtain 5 to10 ppm available chlorine.Apply half (or 1/3, 1⁄4, or 1/5) ofthis initial dose when half (or1/3, 1⁄4, or 1/5) of the water in thesystem has been lost by blowdown. Badly fouled systemsNot ListedDocket Number: EPA-HQ-OPP-2010-0242www.regulations.gov33 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPulp and Paper Mill ProcessWater Systems, Cooling Tower,Air Washer and EvaporativeCondenser Water, Pasteurizer,Warmer and Cannery CoolingWater Systems IncludingChillers (Continued)PressurizedGas37982-252374-12Slug Feed,Intermittent Feedand ContinuousFeedmust be cleaned before initialtreatment.Subsequent Doses:Whenmicrobial control is evident, testdaily and maintain a residual of1 ppm Apply half (or 1/3, 1⁄4, or1/5) of this initial dose when half(or 1/3, 1⁄4, or 1/5) of the water inthe system has been lost by blowdown.Continuous Feed Method:Initial Dose:When system isnoticeably fouled applysufficient chlorine to obtain 5-10ppm available chlorine. Repeatuntil control is achieved.Badly fouled systems must becleaned before initial treatment.Subsequent Doses:Whenmicrobial control becomesevident, start a continuous feedand test daily to maintain 1 ppmresidual.Not ListedWater Cooling Systems andPaper MillsTechnicalChemical37982-39Not Listed Refer to the Chlorine Manualpublished by the ChlorineInstitute for instructions on therequired product use and safetyprocedures.Before working with this product, handlers must betrained on how to appropriately use respirators thatconforms to OSHA requirements and how toappropriately handle and use chlorine.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov34 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPulp and Paper Process Waterand Cooling Tower WaterTreatmentPressurizedGas67649-5DispensingEquipmentRefer to the “Chlorine Manualpublished by the ChlorineInstitute, Inc. for instructions onthe required product use andsafety procedures.Using Chlorine in Containers:Connecting andDisconnecting:Use a specialadapter (4-A) to connectcontainer to a piping system. Toconnect line to container,remove valve protection hood.(1-A) and valve outlet cap (2-A).Then use the wrench (3) shownto attach tubing to valve withyoke (4-B). Use a new gasketwith each time a connection ismade. Make sure connectionsare tight. Check for leaks withammonia vapor. Appearance ofwhite vapor indicates a chlorineleak. Never use standard pipefittings.Turn the stem on full turncounterclockwise to open valve(2). Don’t use container valve(2) to regulate chlorine flow.Use of valve for flow controlmay wear valve seat so that itcannot be tightly closed. Neverforce the valve stem. Hit wrenchThe registrant is solely responsible for the safety of theservicing equipment, and for the repackaging of thisgas from larger containers into portable cylinders andton containers. Each re-packager must obtain its ownEPA registration number for this use and its own EPAEstablishment Number from the EPA. Re-packagersmay only dispense this product to portable containersthat are approved for chlorine and are appropriatelylabeled.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov35 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPulp and Paper Process Water,Cooling Tower WaterTreatment (Continued)PressurizedGas67649-5DispensingEquipmenthandle with the heel of the handto loosen a stuck valve stem.Never use a hammer or otherimplements for this purpose.Packaging nut may be loosenedslightly to relieve tight stem, butretighten promptly to avoid leak.To disconnect, close valve (2),disconnect yoke and adapter (4-A&4-B), test valve for leaks,apply valve outlet cap (2-A) withgasket. Replace valve protectionhood (1) on container. Plug orcap the open end of chlorine lineimmediately to keep outmoisture.The registrant is solely responsible for the safety of theservicing equipment, and for the repackaging of thisgas from larger containers into portable cylinders andton containers. Each re-packager must obtain its ownEPA registration number for this use and its own EPAEstablishment Number from the EPA. Re-packagersmay only dispense this product to portable containersthat are approved for chlorine and are appropriatelylabeled.Swimming PoolIndustrial and CommercialSwimming PoolsPressurizedGas266-355382-388996-650956-6DispensingEquipmentNot ListedOnly specifically designeddispensing equipmentshould be used in accordance with the manufacturer’sinstructions and according tostate regulatory agencyrecommendations for dosages or residual chlorinelevels which should be maintained for each specificsite of application.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov36 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsReady to Use63802-1Solid Agar70264-1DispensingEquipmentNot ListedOnly specifically designeddispensing equipmentshould be used in accordance with the manufacturer’sinstructions and according tostate regulatory agencyrecommendations for dosages or residual chlorinelevels which should be maintained for each specificsite of application.Industrial and CommercialSwimming Pools (Continued)PressurizedGas33458-1TechnicalChemical70529-1DispensingEquipmentHandle and use only inaccordance with practicerecommended in the ChlorineManual published by theChlorine Institute.General Instructions:Chlorinecylinders have one valve andwill deliver gas chlorine in theupright position. Ton containershave to valves in one head: inthe horizontal position withvalves in a vertical line the willdeliver gas from upper valve andliquid from lower valve.New York use only. Use in well ventilated areas.Connection of containers discharging liquid to amanifold is not recommended. Never connect to amanifold a new container that is not at the sametemperature as other containers connected to thesystem. Never heat chlorine containers or valves. Donot place them in hot water bath to increase dischargebates. Be sure no water or other liquid is sucked backinto container due to pressure differences especiallywhen it is nearly empty. Never leave container valvesopen when chlorine is not being used.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov37 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsIndustrial and CommercialSwimming Pools (Continued)PressurizedGas33458-1DispensingEquipmentConnecting andDisconnecting:Use 500 psigcopper tubing fitted with specialadapter to connect container topiping system. To connect lineto container, remove valveprotection cap and valve outletcap. Then use wrench shown toattach tubing to valve with yoke.Use new gasket supplied withcontainer each time connectionis made. Make sure connectionsare tight. Check for leaks withammonia vapor. Never usestandard pipe fittings.Turn stem one full turncounterclockwise to open valve.Do not use container valve toregulate the chlorine. Use ofvalve for flow control may wearvalve seat so that it cannot betightly closed. Never force thevalve stem. Hit wrench handlewith the heel of the hand toloosen a stuck valve stem. Neveruse a hammer or otherimplements for this purpose.Packing may be loosenedslightly to relieve tight stem, butretighten to avoid leak.New York use only. Use in well ventilated areas.Connection of containers discharging liquid to amanifold is not recommended. Never connect to amanifold a new container that is not at the sametemperature as other containers connected to thesystem. Never heat chlorine containers or valves. Donot place them in hot water bath to increase dischargebates. Be sure no water or other liquid is sucked backinto container due to pressure differences especiallywhen it is nearly empty. Never leave container valvesopen when chlorine is not being used.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov38 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPressurizedGas33458-1DispensingEquipmentTo disconnect, close valve, testvalve for leaks, apply valveoutlet cap with gasket andprotection hood. Plug or cap theopen end of the chlorine lineimmediately to keep outmoisture.New York use only. Use in well ventilated areas.Connection of containers discharging liquid to amanifold is not recommended. Never connect to amanifold a new container that is not at the sametemperature as other containers connected to thesystem. Never heat chlorine containers or valves. Donot place them in hot water bath to increase dischargebates. Be sure no water or other liquid is sucked backinto container due to pressure differences especiallywhen it is nearly empty. Never leave container valvesopen when chlorine is not being used.TechnicalChemical37982-39Not Listed Refer to the Chlorine Manualpublished by the ChlorineInstitute for instructions on therequired product use and safetyprocedures.Before working with this product, handlers must betrained how to appropriately use respirators thatconforms to OSHA requirements and how toappropriately handle and use chlorine.PressurizedGas148-707TechnicalChemical72315-1DispensingEquipmentNot Listed New York use only. Only specifically designeddispensing equipment should be used in accordancewith the manufacturer’s instructions and according tostate regulatory agencyrecommendations for dosagesor residual chlorine levels which should be maintainedfor each specific site of application.Industrial and CommercialSwimming Pools (Continued)PressurizedLiquid41209-4Not Listed Not Listed Only certain dispensing equipment should be used inaccordance with the manufacturer’s instructions andaccording to state regulatory agency recommendationsfor dosages or residual chlorine levels which should bemaintained for each specific site of applicationDocket Number: EPA-HQ-OPP-2010-0242www.regulations.gov39 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsResidential and NonResidential Swimming PoolsResidential and NonResidential Swimming Pools(Continued)PressurizedGas813-101744-10TechnicalChemical37982-39464-99DispensingEquipmentDispensingEquipmentRefer to the appropriate ChlorineInstitute pamphlet forinstructions and the requiredproduct use and safetyprocedures.Refer to the appropriate ChlorineInstitute pamphlet forinstructions and the requiredproduct use and safetyprocedures.This product including dispensing equipment must behandled and used in accordance with the practicesspecified by all appropriate product labeling and theappropriate CI pamphlet.This product including dispensing equipment must behandled and used in accordance with the practicesspecified by all appropriate product labeling and theappropriate CI pamphlet.Residential Swimming PoolsPressurizedGas67649-5DispensingEquipmentRefer to the appropriate ChlorineInstitute pamphlet forinstructions and the requiredproduct use and safetyprocedures.Using Chlorine in Containers:Connecting andDisconnecting:Use a specialadapter (4-A) to connectcontainer to a piping system. Toconnect line to container,remove valve protection hood.(1-A) and valve outlet cap (2-A).Then use the wrench (3) shownto attach tubing to valve withyoke (4-B). Use a new gasketwith each time a connection ismade. Make sure connectionsThis product including dispensing equipment must behandled and used in accordance with the practicesspecified by all appropriate product labeling and theappropriate CI pamphlet.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov40 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsResidential Swimming Pools(Continued)PressurizedGas67649-5DispensingEquipmentare tight. Check for leaks withammonia vapor. Appearance ofwhite vapor indicates a chlorineleak. Never use standard pipefittings.Turn the stem on full turncounterclockwise to open valve(2). Don’t use container valve(2) to regulate chlorine flow.Use of valve for flow controlmay wear valve seat so that itcannot be tightly closed. Neverforce the valve stem. Hit wrenchhandle with the heel of the handto loosen a stuck valve stem.Never use a hammer or otherimplements for this purpose.Packaging nut may be loosenedslightly to relieve tight stem, butretighten promptly to avoid leak.To disconnect, close valve (2),disconnect yoke and adapter (4-A&4-B), test valve for leaks,apply valve outlet cap (2-A) withgasket. Replace valve protectionhood (1) on container. Plug orcap the open end of chlorine lineimmediately to keep outmoisture.This product including dispensing equipment must behandled and used in accordance with the practicesspecified by all appropriate product labeling and theappropriate CI pamphlet.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov41 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPressurizedGas43407-145851-156410-158618-1DispensingEquipmentHandle and use only inaccordance with practicerecommended in the chlorinemanual published by theChlorine Institute.Only specifically designeddispensing equipmentshould be used in accordance with the manufacturer’sinstructions and according tostate regulatory agencyrecommendations for dosages or residential chlorinelevels which should be maintained for each specificsite of application.PressurizedGas52134-156652-1DispensingEquipmentNot Listed. Only specifically designed dispensing equipmentshould be used in accordance with the manufacturer’sinstructions and according tostate regulatory agencyrecommendations for dosages or residential chlorinelevels which should be maintained for each specificsite of application. New York Use Only.Residential Swimming Pool(Continued)PressurizedGas56572-2Chlorine Spargeror InjectionSystemsAlways adjust pH between 7.8and 8.2 after the application ofthis product. Total alkalinitylevels should be maintained atbetween 80 ppm-140 ppm with100 ppm to 120 ppm consideredideal in most cases. Maintaincynauric acid level between 50ppm and 100 ppm.For a newly filled pool or springstart-up, super chlorinate asindicated above. Adjust andmaintain the alkalinity of theDo not use pool for one hour after application of thisproduct or until available chlorine residual has droppedto 4.0 ppm as determined by using a test kit.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov42 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse Limitationspool between 80 ppm to 140ppm. Adjust cynauric acid levelto 100ppm.Residential Swimming Pool(Continued)TechnicalChemical70529-1DispensingEquipmentHandle and use only inaccordance with practicerecommended in the ChlorineManual published by theChlorine Institute.General Instructions:Chlorinecylinders have one valve andwill deliver gas chlorine in theupright position. Ton containershave to valves in one head: inthe horizontal position withvalves in a vertical line that willdeliver gas from upper valve andliquid from lower valve.Connecting andDisconnecting:Use 500 psigcopper tubing fitted with specialadapter to connect container topiping system. To connect lineto container, remove valveprotection cap and valve outletcap. Then use wrench shown toattach tubing to valve with yoke.Use new gasket supplied withcontainer each time connectionNew York use only. Use in well ventilated areas.Connection of containers discharging liquid to amanifold is not recommended. Never connect to amanifold a new container that is not at the sametemperature as other containers connected to thesystem. Never heat chlorine containers or valves.Do not place them in hot water bath to increasedischarge bates. Be sure no water or other liquid issucked back into container due to pressure differencesespecially when it is nearly empty. Never leavecontainer valves open when chlorine is not being used.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov43 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsResidential Swimming Pool(Continued)TechnicalChemical70529-1DispensingEquipmentis made. Make sure connectionsare tight. Check for leaks withammonia vapor. Never usestandard pipe fittings.Turn stem one full turncounterclockwise to open valve.Do not use container valve toregulate the chlorine. Use ofvalve for flow control may wearvalve seat so that it cannot betightly closed. Never force thevalve stem. Hit wrench handlewith the heel of the hand toloosen a stuck valve stem. Neveruse a hammer or otherimplements for this purpose.Packing may be loosenedslightly to relieve tight stem, butretighten to avoid leak.To disconnect, close valve, testvalve for leaks, apply valveoutlet cap with gasket andprotection hood. Plug or cap theopen end of the chlorine lineimmediately to keep outmoisture.New York use only. Use in well ventilated areas.Connection of containers discharging liquid to amanifold is not recommended. Never connect to amanifold a new container that is not at the sametemperature as other containers connected to thesystem. Never heat chlorine containers or valves.Do not place them in hot water bath to increasedischarge bates. Be sure no water or other liquid issucked back into container due to pressure differencesespecially when it is nearly empty. Never leavecontainer valves open when chlorine is not being used.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov44 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsCommercial Swimming PoolsCommercial Swimming Pools(Continued)PressurizedGas550-2006785-1PressurizedGas550-200DispensingEquipmentDispensingEquipmentRefer to the Chlorine Manualpublished by the ChlorineInstitute for instructions on therequired product use andprocedures.Using Chlorine in Containers(See Diagrams 1-4)Connectingand Disconnecting:Use 500Psig Copper Tubing filtered withspecial adapter (4-A Cylinder 4-B for Ton Container) to connectcontainer to piping system.To connect line to containerremove valve protection hood.(1) Check to ensure cylindervalve is closed: valve closesclockwise. Adjustpacking nut to1⁄4 to 1⁄2 turn past hand tight.Then use the wrench to attachtubing valve with yoke. Use newgasket supplied with containereach time connection is made.Make sure connections are tight.Close auxiliary valve, opencylinder valve one half turncounterclockwise and then closeimmediately. Test for leaks withConnection of containers discharging liquid to amanifold is not recommended. Never connect to a gasmanifold a new container that is not the sametemperature as other containers connected in thesystem.Connection of containers discharging liquid to amanifold is not recommended. Never connect to a gasmanifold a new container that is not the sametemperature as other containers connected in thesystem.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov45 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPressurizedGas550-200DispensingEquipmentammonia vapor. Appearance ofwhite vapor indicates a chlorineleak. If a yoke is indicativetighten yoke and retest. If leakpersists remove gasket andreplace with a new gasket.Retest using the aboveprocedure. If no leaks aredetected, open auxiliary valveone turn and cylinder valve oneturn.Disconnection:To disconnectclose cylinder valve. Closeauxiliary valve. Disconnecttubing and yoke. Test for leaks.Apply valve outlet cap withgasket and tighten.Disconnection:Replace valveprotection hood on container.Plug or cap the open end of thechlorine line immediately tokeep out moisture.Connection of containers discharging liquid to amanifold is not recommended. Never connect to a gasmanifold a new container that is not the sametemperature as other containers connected in thesystem.Commercial Swimming Pools(Continued)PressurizedGas7151-4DispensingEquipmentUsing Chlorine in Cylinders,See Diagrams 1-4Connecting andDisconnecting:Use 500 psigcopper tubing fitted with specialadapter (4-A) to connectcontainers to piping system. Toconnect line to containers,remove valve protection hood(1) and valve outlet cap (2-A).Handle and use only in accordance with practicerecommended in the Chlorine Manual published by theChlorine Institute. Only specifically designeddispensing equipment should be used in accordancewith the manufacturer’s instructions and according tostate regulatory agencyrecommendations for dosagesor residual chlorine levels which should be maintainedfor each specific site of application.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov46 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsThen use wrench (3) shown toattach tubing to valve with yoke(4-B). Use new gasket suppliedwith cylinder each timeconnection is made.Make sure connections are tight.Check for leaks with ammoniavapor. Appearance of whitevapor indicates Chlorine leak.Never use standard pipe fittingsTechnicalChemical45849-1Dispenser orInjection SystemThis product is to be dispensedinto water through the process ofdiffusion using a chlorinedisperser or injection system.Always adjust pH between 7.8and 8.2 after application of thisproduct. Total alkalinity levelsshould be maintained between80 ppm and 140 ppm with 100ppm to 120 ppm consideredideal in most cases. Maintaincynauric acid level between 50ppm and 100 ppm. For newlyfilled pools, adjust and maintainsame levels as above.Do not use pool for one hour after application of thisproduct or until the free active chlorine residual hasdropped to 5.0 ppm as determined by a test kit.Swimming PoolsPressurizedGas52374-12ChlorinatorNew Pool or Spring Start up:Using an appropriate chlorinatorand following themanufacturer’s directions, superchlorinate the pool with 5 to 10ppm available chlorine byweight. Check the level ofavailable chlorine with a test kit.Do not enter the pool until the chlorine residual isbetween 1.0 to 3.0 ppm.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov47 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPressurizedGas52374-12ChlorinatorAdjust and maintain pool waterpH between 7.2 and 7.6. Adjustand maintain alkalinity of thepool to between 50 and 100ppm.Pool Maintenance:Using anappropriate chlorinator and thefollowing manufacturer’sdirections, add chlorine to obtain0.6 to 1.0 ppm available chlorineby weight.Stabilized pools shouldmaintain a residual of 1.0 to 1.5ppm available chlorine. Test thepH, available chlorine residualand alkalinity of the waterfrequently with appropriate testkits. Frequency of watertreatment will depend upontemperature and number ofswimmers.Every 7 days or as necessary,using an appropriate chlorinatorand following manufacturer’sdirections super chlorinate thepool water by raising theavailable chlorine to 5 to 10 ppmavailable chlorine by weight.Check the level of availablechlorine with a test kit.Do not enter the pool until the chlorine residual isbetween 1.0 to 3.0 ppm.Swimming Pools(Continued)TechnicalChemical69874-5Not Listed This product includingdispensing equipment must behandled and used in accordanceRefer to the Chlorine Manual published by theChlorine Institute, Inc., for instructions on safetyprocedures.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov48 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse Limitationswith the practices specified byall applicable product labelingand the Chlorine Manualpublished by the ChlorineInstitute.Industrial and CommercialSwimming PoolsPressurizedGas266-35Not Listed Not Listed Only certain dispensing equipment should be used inaccordance with the manufacturer’s instructions andaccording to state regulatory agency recommendationsfor dosages or residual chlorine levels which should bemaintained for each specific site of application.Residential Swimming Pools,Spas, Hot Tubs, Hubbard andImmersion Tanks andHydrotherapy TanksPressurizedGas37982-2Manually or FeederDeviceResidential Pools:For new pool or spring start-up,super chlorinate with 5 to 10ppm available chlorine byweight. Check the level ofavailable chlorine with a test kit.Adjust and maintain pH between7.2 to 7.6. Adjust and maintainthe alkalinity of the pool tobetween 50 to 100 ppm.To maintain the pool, addmanually or by feeder device toyield an available chlorineresidual between 0.6 to 1.0 ppmby weight. Stabilized poolsshould maintain a residual of 1.0Do not chlorinate the pool within 24 hours prior todischarge.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov49 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsResidential Swimming Pools,Spas, Hot Tubs, Hubbard andImmersion Tanks andHydrotherapy Tanks(Continued)PressurizedGas37982-2Manually or FeederDeviceto 1.5 ppm available chlorine.Test the pH, available chlorineresidual and alkalinity of thewater frequently withappropriate test kits. Frequencyof water treatment will dependupon temperature and numberswimmers.Residential Pools:Every 7 days, or as necessary,super chlorinate the pool byraising the available chlorine to5 to 10 ppm available chlorineby weight.Check the level of availablechlorine to 5 to 10 ppm availablechlorine by weight. Check thelevel of available chlorine with atest kit. Do not re-enter pooluntil the chlorine residual isbetween 1.0 to 3.0 ppm.At the end of the swimming poolseason or when water is to bedrained from the pool, chlorinemust be allowed to dissipatefrom treated pool water beforedischarge.Spas, Hot-Tubs:ApplyDo not chlorinate the pool within 24 hours prior todischarge.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov50 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsResidential Swimming Pools,Spas, Hot Tubs, Hubbard andImmersion Tanks andHydrotherapy Tanks(Continued)PressurizedGas37982-2Manually or FeederDevicesufficient chlorine to obtain 5ppm, as determined by a suitablechlorine test kit. Adjust andmaintain pool water pH 7.2 and7.8. Some oils, lotions,fragrances, cleaners, etc. maycause foaming or cloudy wateras well as reduce the efficiencyof the product. Maintain thewater at 5 ppm availablechlorine during use.During extended periods ofdisuse, maintain a 3 ppmchlorine concentration.Hubbard and ImmersionTanks:Before patient use adjustbath to obtain chlorine residual25 ppm as determined by asuitable test kit. Adjust andmaintain the water pH tobetween 7.2 and 7.6. After eachuse drain the tank. Prepare afresh 25 ppm available chlorinesolution in a bucket and circulatethis solution through the agitatorof the tank for 15 minutes andthen rinse out the solution. Cleantank thoroughly dry with cleancloths.Hydrotherapy Tanks:Adjust toobtain a 1 ppm residual, asdetermined by a suitableDo not chlorinate the pool within 24 hours prior todischarge.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov51 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse Limitationschlorine test kit. Pool should notbe entered until the chlorineresidual is below 3 ppm. Adjustand maintain the water pH tobetween 7.2 and 7.6. Operatepool filter continuously. Drainpool weekly and clean beforerefilling.Food Handling/Storage Establishments Premises and EquipmentWash Water Treatment of FoodHandling Premises Equipmentand Food CommoditiesTechnicalChemical464-99PressurizedGas813-101744-10DispensingEquipmentNot Listed This product including dispensing equipment must behandled and used in accordance with the practicesspecified by all appropriate product labeling and theappropriate CI pamphlet.Packing House Equipment forMeat, Fish, Poultry, Egg,Winery, Cannery and otherFood Processing and PackingPlantsPressurizedGas2686-3Rinse, Immersion,Slug Feed,Intermitted Feedand ContinuousFeedSanitization of NonporousFood Contact SurfacesRinse and Immersion Method:A solution of 100 ppm availablechlorine may be used insanitizing solution. Solutionscontaining an initialconcentration of 100 ppmavailable chlorine must be testedand adjusted periodically toinsure that available chlorinedoes drop below 50 ppm.Do not rinse equipment with water after treatment anddo not soak equipment overnight.Sanitizers used in automated systems for sanitizationof non-porous food contact surfaces may be used forgeneral cleaning but may not be reused for sanitizingpurposes.If additional additives, such as corrosive inhibitors,anti-foam agents and others are used in cooling tower,do not reuse this water onfood or food contact surfaceunless these additives have food tolerances.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov52 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPacking House Equipment forMeat, Fish, Poultry, Egg,Winery, Cannery and otherFood Processing and PackingPlants (Continued)PressurizedGas2686-3Rinse, Immersion,Slug Feed,Intermitted Feedand ContinuousFeedCheck the concentration ofavailable chlorine using achlorine test kit.Rinse Method: Clean equipmentsurfaces in the normal manner.Prior to use, rinse all surfacesthoroughly with the sanitizingsolutions, maintaining contactwith the sanitizer for at least 2minutes.If solution contains less than 50ppm available chlorine, asdetermined by a suitable test kit,discard the solutions.Immersion Method:Cleanequipment surfaces in thenormal manner. Prior to use,immerse equipment in sanitizingsolution for at least 2 minutesand allow sanitizer to drain.If solution contains less than 50ppm available chlorine, asdetermined by a suitable test kit,discard the solutions.Sanitization of Porous FoodContact SurfacesRinse Method: A solution of600 ppm available chlorine maybe used to sanitize food contactsurfaces. Clean surfaces in theDo not rinse equipment with water after treatment anddo not soak equipment overnight.Sanitizers used in automated systems for sanitization ofnon-porous food contact surfaces may be used forgeneral cleaning but may not be reused for sanitizingpurposes.If additional additives, such as corrosive inhibitors,anti-foam agents and others are used in cooling tower,do not reuse this water onfood or food contact surfaceunless these additives have food tolerances.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov53 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPacking House Equipment forMeat, Fish, Poultry, Egg,Winery, Cannery and otherFood Processing and PackingPlants (Continued)PressurizedGas2686-3Rinse, Immersion,Slug Feed,Intermitted Feedand ContinuousFeednormal manner. Prior to use,rinse all surfaces thoroughlywith 600 ppm sanitizingsolution, maintaining contactwith sanitizer for at least 2minutes. Prior to usingequipment, rinse all surfaceswith a 200 ppm availablechlorine solution.Immersion Method:Prepare asolution containing 600 ppmavailable chlorine. Cleanequipment in the normal manner.Prior to use, immerse equipmentsanitizing solution for at least 2minutes and allow the sanitizerto drain. Prior to usingequipment, immerse all surfacesin 200 ppm available chlorinesolution.Slug and Intermitted FeedMethod/Initial Dose:Whensystem is noticeably fouled,maintain 5-10 ppm availablechlorine in the water.Subsequent Dose:Whenmicrobial control is evident,maintain the chlorine residual at1 ppm. Badly fouled systemsmust be cleaned before treatmentDo not rinse equipment with water after treatment anddo not soak equipment overnight.Sanitizers used in automated systems for sanitization ofnon-porous food contact surfaces may be used forgeneral cleaning but may not be reused for sanitizingpurposes.If additional additives, such as corrosive inhibitors,anti-foam agents and others are used in cooling tower,do not reuse this water onfood or food contact surfaceunless these additives have food tolerances.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov54 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPacking House Equipment forMeat, Fish, Poultry, Egg,Winery, Cannery and otherFood Processing and PackingPlants (Continued)PressurizedGas2686-3Rinse, Immersion,Slug Feed,Intermitted Feedand ContinuousFeedis begun.Continuous FeedMethod/Initial Dose: Whensystem is noticeably fouled,maintain 5-10 ppm availablechlorine in the water.Subsequent Dose:Adjust thechlorinator to deliver chlorinecontinuously so a level of 1 ppmavailable chlorine can bemaintained in the water. Badlyfouled systems must be cleanedbefore treatment is begun.Chlorination of IncomingWater:For entire incomingwater supply, to be used in plantchlorination, maintain in thewater a free available chlorineresidual of 5-7 ppm.Can-Cooling Water:Maintain1 ppm available chlorine inwater use for cooling sealed cansafter heat sterilization.Do not rinse equipment with water after treatment anddo not soak equipment overnight.Sanitizers used in automated systems for sanitization ofnon-porous food contact surfaces may be used forgeneral cleaning but may not be re used for sanitizingpurposes.If additional additives, such as corrosive inhibitors,anti-foam agents and others are used in cooling tower,do not reuse this water onfood or food contact surfaceunless these additives have food tolerances.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov55 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsEgg Handling Equipment, Fishand Seafood ProcessingEquipment, Meat ProcessingEquipment, Poultry ProcessingEquipmentPressurizedGas37982-2SpraySpray Method:Cover orremove all food and packagingmaterials. Pre-clean equipmentwith an appropriate cleaningsolution and rinse. Spray theequipment with a 50 ppmavailable chlorine solution.Not ListedFood Processing Water SystemsFood Processing Water SystemsPressurizedGas37982-2PressurizedGas37982-2Slug Feed,Intermittent Feed,Continuous FeedSlug Feed,Intermittent Feed,Continuous FeedSlug Feed Method:InitialDose: when system is noticeablyfouled apply sufficient chlorineto obtain 20 ppm availablechlorine. Repeat until control isachieved.Badly fouled systems must becleaned before initial treatment.Subsequent Doses:Whenmicrobial controls becomeevident, test daily and maintain a1 ppm residual.Intermittent Feed Method/Initial Dose:When system isnoticeably fouled, applysufficient chlorine to obtain 20ppm available chlorine. Applyhalf (or 1/3, 1⁄4, or 1/5) of thisinitial dose when half (or 1/3, 1⁄4,or 1/5) of the water in the systemhas been lost by blow down.Badly fouled systems must becleaned before initial treatment.Not ListedNot ListedDocket Number: EPA-HQ-OPP-2010-0242www.regulations.gov56 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsFood Processing Water SystemsPressurizedGas37982-2Slug Feed,Intermittent Feed,Continuous FeedSubsequent Doses:Whenmicrobial control becomesevident, test daily and maintain a1 ppm residual. Apply (or 1/3,1⁄4, or 1/5) of this initial dosewhen half (or 1/3, 1⁄4, or 1/5) ofthe water in the system has beenlost by blow down.Continuous Feed Method/Initial Dose:When system isnoticeably fouled applysufficient chlorine to obtain from20 ppm available chlorine.Repeat until control is achieved.Badly fouled systems must becleaned before initial treatment.Subsequent Doses:Whenmicrobial control becomesevident, start a continuous feedtest daily to maintain 1 ppmresidual.Not ListedFood Processing Plant, FoodContact and Non-ContactSurfacesTechnicalChemical37982-39Not Listed Refer to the Chlorine Manualpublished by the ChlorineInstitute for instructions on therequired product use and safetyprocedures.Before working with this product, handlers must betrained how to appropriately use respirators thatconforms to OSHA requirements and how toappropriately handle and use chlorine.Sanitation of Packing HouseEquipment, Meat, Fish, Poultry,and Egg Processing PlantsPressurizedGas67799-1DispensingEquipmentNot Listed This product is intended to be used only by Seaccopersonnel or under the supervision and instruction ofSeaco Technologies. Refer to product bulletin(Seachlor 100 Chlorine Instructions Booklet) forspecific application instructions.Agricultural Premises and EquipmentDocket Number: EPA-HQ-OPP-2010-0242www.regulations.gov57 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsWash Water for RawAgricultural CommoditiesTechnicalChemical464-99PressurizedGas813-10DispensingEquipmentNot Listed This product including dispensing equipment must behandled and used in accordance with the practicesspecified by all appropriate product labeling and theappropriate CI pamphlet.Wash Water for RawAgricultural Commodities andRepacking into SmallerContainersTechnicalChemical37982-39Not Listed Refer to the Chlorine Manualpublished by the ChlorineInstitute for instructions on therequired product use and safetyprocedures.Before working with this product, handlers must betrained how to appropriately use respirators thatconforms to OSHA requirements and how toappropriately handle and use chlorine.Wash Water for RawAgricultural Commodities,Repacking into SmallerContainer and to ManufactureSodium HypochloritePressurizedGas67649-5DispensingEquipmentRefer to the Chlorine Manualpublished by the ChlorineInstitute for instructions on therequired product use and safetyprocedures.Using Chlorine in Containers:Connecting andDisconnecting:Use a specialadapter (4-A) to connectcontainer to a piping system. Toconnect line to container,remove valve protection hood.(1-A) and valve outlet cap (2-A).Then use the wrench (3) shownto attach tubing to valve withyoke (4-B). Use a new gasketwith each time a connection ismade. Make sure connectionsThe registrant is solely responsible for the safety of theservicing equipment, and for the repackaging of thisgas from larger containers into portable cylinders andton containers. Each re-packager must obtain its ownEPA registration number for this pesticide for this useand its own EPA Establishment Number from the EPA.Re-packagers may only dispense this product toportable containers that are approved for chlorine andare appropriately labeled.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov58 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsWash Water for RawAgricultural Commodities,Repacking into SmallerContainers and to ManufactureSodium HypochloritePressurizedGas67649-5DispensingEquipmentare tight. Check for leaks withammonia vapor. Appearance ofwhite vapor indicates a chlorineleak. Never use standard pipefittings.Turn the stem on full turncounterclockwise to open valve(2). Don’t use container valve(2) to regulate chlorine flow.Use of valve for flow controlmay wear valve seat so that itcannot be tightly closed. Neverforce the valve stem. Hit wrenchhandle with the heel of the handto loosen a stuck valve stem.Never use a hammer or otherimplements for this purpose.Packaging nut may be loosenedslightly to relieve tight stem, butretighten promptly to avoid leak.To disconnect, close valve (2),disconnect yoke and adapter (4-A&4-B), test valve for leaks,apply valve outlet cap (2-A) withgasket. Replace valve protectionhood (1) on container. Plug orcap the open end of chlorine lineimmediately to keep outmoisture.The registrant is solely responsible for the safety of theservicing equipment, and for the repackaging of thisgas from larger containers into portable cylinders andton containers. Each re-packager must obtain its ownEPA registration number for this pesticide for this useand its own EPA Establishment Number from the EPA.Re-packagers may only dispense this product toportable containers that are approved for chlorine andare appropriately labeled.Egg Plant, Hatcheries, BrooderRooms, Shoe Baths and PostHarvest Treatment of Fruits andPressurizedGas37982-2SpraySpray Method:Cover orremove all food and packagingmaterials. Pre-clean equipmentNot ListedDocket Number: EPA-HQ-OPP-2010-0242www.regulations.gov59 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsVegetablesEgg Plant, Hatcheries, BrooderRooms, Shoe Baths and PostHarvest Treatment of Fruits andVegetablesPressurizedGas37982-2Spraywith an appropriate cleaningsolution and rinse. Spray theequipment with a 50 ppmavailable chlorine solution.Post Harvest Treatment ofFruits and Vegetables:For thecontrol of microorganismscausing decay of fruits andvegetables please refer to thefollowing tables (see label) forthe recommended concentrationlevels of available chlorine.Post Harvest Treatment ofFruits and Vegetables:Fortreatment of fruit and vegetablecommodities, do not rinse withfresh water after treatment. Aftertreatment, moisture must beremoved by centrifuging.Mushrooms must be treated withan anti-oxidant after chlorinetreatment to prevent browning.Not ListedPost Harvest Process for Fruitsand Vegetables and Sanitationof Farm BuildingsPressurizedGas67799-1DispensingEquipmentNot Listed This product is intended to be used only by Seaccopersonnel or under the supervision and instruction ofSeaco Technologies. Refer to product bulletin(Seachlor 100 Chlorine Instructions Booklet) forspecific application instructions.Sanitizing Use for Fruits andVegetable Wash WaterTreatmentTechnicalChemical69874-5DispensingEquipmentThis product includingdispensing equipment must behandled and used in accordanceRefer to the Chlorine Manual published by theChlorine Institute for instructions on safety procedures.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov60 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse Limitationswith the practices specified byall applicable product labelingand the Chlorine Manualpublished by the ChlorineInstitute.Agricultural Irrigation SystemsAgricultural Irrigation Systems(Continued)PressurizedGas37982-2PressurizedGas37982-2Drip/Trickle orSprinklerDrip/Trickle orSprinklerCalibration:If the irrigationwater has high levels of nutrientscausing bacterial,algae, or otherbio-fouling that reduces systemperformance, continuouschlorination may be necessary.The recommended level of freeresidual chlorine for continuousfeed is 1 to 2 ppm, measured atthe end of the farthest lateralusing a good quality test kit forfree chlorine (also called “freeresidual” or “free available”chlorine).Periodic shock treatments at ahigher chlorine rate of up to 20ppm free residual may beappropriate where bacteriaand/or algae clogging and buildup are not managed bymaintaining a continuousresidual. The frequency of thechlorine shock applicationDo not connect any irrigation system, includinggreenhouse systems into which chlorine is to be added,to a public water system unless safety devicesprescribed by the state Department of Health, SafeDrinking Water Branch, for cross connectionprotection are in place.Do not connect any irrigation system, includinggreenhouse systems into which chlorine is to be added,to a public water system unless safety devicesprescribed by the state Department of Health, SafeDrinking Water Branch, for cross connectionprotection are in place.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov61 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsAgricultural Irrigation Systems(Continued)PressurizedGas37982-2Drip/Trickle orSprinklerdepends upon the frequency andextent bio-clogging.Super chlorination, bringingchlorine concentrations to asmuch 100 ppm total chlorine, isrecommended for reclaiminglow-volume irrigation systems ifclogged by algae and bacterialslimes. Set the chlorinator todeliver 100 ppm in the dripsystem and monitor the freechlorine residual at the end ofthe farthest lateral.As soon as it is established thatthe free residual reading between10 to 20 ppm, shut the systemdown and leave it undisturbedfor up to 24 hours. Then flush allsub-mains and laterals with freshwaster. Super chlorination willnot dissolve or remove scale orinorganic sediment fouling.Do not connect any irrigation system, includinggreenhouse systems into which chlorine is to be added,to a public water system unless safety devicesprescribed by the state Department of Health, SafeDrinking Water Branch, for cross connectionprotection are in placeHuman Drinking Water SystemsPublic Systems, Public WaterSystems, Dug Wells, Drilled,Driven and Bored Wells andFlowing Artesian WellsPressurizedGas37982-252374-12Feed with a Hypochlorinator. SprayPublic Systems:Prepare a 100ppm available chlorine solution.Begin feeding this solution witha hypochlorinator until freeavailable chlorine residual of atleast 0.2 ppm and no more than0.6 ppm is attained throughoutthe distribution system. CheckChlorine must be applied at a sufficient residualconcentration for sufficient time (CT Value) to achievethe required disinfection. The concentration of residualfree chlorine must be monitored such that it does notexceed 4.0 ppm at any consumer’s tap.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov62 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPublic Systems, Public WaterSystems, Dug Wells, Drilled,Driven and Bored Wells andFlowing Artesian WellsPressurizedGas37982-252374-12Feed with a Hypochlorinator, Spraywater frequently with a chlorinetest kit.Bacteriological sampling mustbe conducted at a frequency noless than that prescribed byNational Interim PrimaryDrinking Water Regulations.Individual Systems-Dug Wells:Upon completion of the casing(lining) wash the interior ofcasing (lining) with a 100 ppmavailable chlorine solution usinga stiff brush.After covering the well, poursanitizing solution into wellthrough both the pipe sleeveopening and the pipeline. Washthe exterior ofthe pump cylinderalso with the sanitizing solution.Start pump and pump water untilstrong odor if chlorine water inwater is noted. Stop pump andwait at least 24 hours. After 24hours flush well until all tracesof chlorine have been removedfrom the water.Individual Systems-Drilled,Driven, and Bored Wells:Runpump until water is as free fromturbidity as possible. Pour a 100Chlorine must be applied at a sufficient residualconcentration for sufficient time (CT Value) to achievethe required disinfection. The concentration of residualfree chlorine must be monitored such that it does notexceed 4.0 ppm at any consumer’s tap.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov63 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPublic Systems, Public WaterSystems, Dug Wells, Drilled,Driven and Bored Wells andFlowing Artesian WellsPressurizedGas37982-252374-12Feed with a Hypochlorinator, Sprayppm available chlorine sanitizingsolution into the well. Add 5 to10 gallons of clean chlorinatedwater to the well in order toforce the sanitizer into rockformation.Wash the exterior of pumpcylinder with the sanitizer. Droppipeline into well, start pumpand pump water until strongodor of chlorine is noted. Stoppump and wait at least 24 hours.Individual Systems-Drilled,Driven, and Bored Wells:After24 hours flush well until alltraces of chlorine have beenremoved from the water. Deepwells with high water levels maynecessitate the use of specialmethods for introduction of thesanitizer into the well.Individual Systems-FlowingArtesian Wells:Artesian wellsgenerally do not requiredisinfection. If analyses indicatepersistent contamination, thewell should be disinfected.Emergency Disinfection:WhenChlorine must be applied at a sufficient residualconcentration for sufficient time (CT Value) to achievethe required disinfection. The concentration of residualfree chlorine must be monitored such that it does notexceed 4.0 ppm at any consumer’s tap.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov64 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPublic Systems, Public WaterDug Wells, Drilled, Driven,Bored Wells and FlowingArtesian WellsPressurizedGas37982-252374-12Feed with a Hypochlorinator, Sprayboiling of water for 1 minute isnot practical, water can be madepotable by using this product.Prior to addition of the sanitizer,remove all suspended materialby filtration or by allowing it tosettle to the bottom.Emergency Disinfection:Decant the clarified,contaminated water to a cleancontainer and add sufficientchlorine to obtain 0.5 ppm.Allow the treated water to standfor 30 minutes.Properly treated water shouldhave a slight chlorine odor, if notrepeat dosage and allow thewater to stand an additional 15minutes.The treated water can then bemade palatable by pouring itbetween clean containers severaltimes.Public Water Systems:Algae Control in Reservoirs:Hypochlorinate streams feedingthe reservoir. Suitable feedingpoints should be selected oneach stream at least 50 yardsupstream from the points ofChlorine must be applied at a sufficient residualconcentration for sufficient time (CT Value) to achievethe required disinfection. The concentration of residualfree chlorine must be monitored such that it does notexceed 4.0 ppm at any consumer’s tap.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov65 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPublic Systems, Public WaterDug Wells, Drilled, Driven,Bored Wells and FlowingArtesian WellsPressurizedGas37982-252374-12Feed with a Hypochlorinator, Sprayentry into the reservoir.Mains: Thoroughly flush sectionto be sanitized by dischargingfrom hydrants. Permit a waterflow of at 2.5 feet per minute tocontinue under pressure whileinjecting this product by meansof a hypochlorinator. Stop waterflow when chlorine a chlorinewhen a chlorine residual test of50 ppm is obtained at the lowpressure end of the new mainsection after 24 hours retentiontime.When chlorination is completed,the system must be flushed freeof all heavily chlorinated water.New Tanks, Basins:Remove allphysical soil from surfaces.Prepare a 500 ppm availablechlorine solution. Fill to workingcapacity and allow solution tostand for at least 4 hours. Drainand flush potable water andplace in service.New Filter Sand:Beforeplacing filter in service, preparea 100 to 1000 ppm availablechlorine solution and fill to adepth of 1 foot above filter sand.Chlorine must be applied at a sufficient residualconcentration for sufficient time (CT Value) to achievethe required disinfection. The concentration of residualfree chlorine must be monitored such that it does notexceed 4.0 ppm at any consumer’s tap.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov66 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPublic Systems, Public WaterDug Wells, Drilled, Driven andBored Wells and FlowingArtesian WellsPressurizedGas37982-252374-12Feed with a Hypochlorinator, SprayWait 30 minutes before drainingwater to a level that is even withthe top filter. Wait for 4 to 6hours before completely drainingand backwashing filter.New Wells:Flush the casingwith a 50 ppm available chlorinesolution. The solution should bepumped or fed by gravity intothe well after thorough mixingwith agitation. The well shouldstand for several hours orovernight under chlorination. Itmay then be pumped until arepresentative raw water sampleis obtained.Bacterial examination of thewater will indicate whetherfurther treatment is necessary.Existing Equipment:Removeequipment from service andthoroughly clean surfaces of allphysical soil. Sanitize with a 500ppm available chlorine solution.Fill working capacity and letstand at least 4 hours. Drain andreturn to service. If the previoustreatment is not practical,surfaces may be sprayed with asolution containing 1000 ppmavailable chlorine. After drying,flush with water and return toservice.Chlorine must be applied at a sufficient residualconcentration for sufficient time (CT Value) to achievethe required disinfection. The concentration of residualfree chlorine must be monitored such that it does notexceed 4.0 ppm at any consumer’s tap.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov67 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsMunicipal Drinking waterSuppliesPressurizedGas37982-39Not Listed Refer to the Chlorine Manualpublished by the ChlorineInstitute for instructions on therequired product use and safetyprocedures.Before working with this product, handlers must betrained how to appropriately use respirators thatconforms to OSHA requirements and how toappropriately handle and use chlorine.Human Drinking WaterTreatmentTechnicalChemical69874-5Not Listed This product includingdispensing equipment must behandled and used in accordancewith the practices specified byall applicable product labelingand the Chlorine Manualpublished by the ChlorineInstitute.Refer to the Chlorine Manual published by theChlorine Institute for instructions on safety procedures.Aquatic AreasAgricultural Irrigation SystemsPressurizedGas37982-2Drip/Trickle orSprinklerCalibration:If the irrigationwater has high levels of nutrientscausing bacterial,algae, or otherbio-fouling that reduces systemperformance, continuouschlorination may be necessary.The recommended level of freeresidual chlorine for continuousfeed is 1 to 2 ppm, measured atthe end of the farthest lateralusing a good quality test kit forfree chlorine (also called “freeresidual” or “free available”chlorine).Periodic shock treatments at ahigher chlorine rate of up to 20Do not connect any irrigation system, includinggreenhouse systems into which chlorine is to be added,to a public water system unless safety devicesprescribed by the state Department of Health, SafeDrinking Water Branch, for cross connectionprotection are in place.Docket Number: EPA-HQ-OPP-2010-0242www.regulations.gov68 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsPressurizedGas37982-2Drip/Trickle orSprinklerppm free residual may beappropriate where bacteriaand/or algae clogging and buildup are not managed bymaintaining a continuousresidual. The frequency of thechlorine shock applicationdepends upon the frequency andextent bio-clogging.Super chlorination, bringingchlorine concentrations to asmuch 100 ppm total chlorine, isrecommended for reclaiminglow-volume irrigation systems ifclogged by algae and bacterialslimes.Set the chlorinator to deliver 100ppm in the drip system andmonitor the free chlorineresidual at the end of the farthestlateral. As soon as it isestablished that the free residualreading between 10 to 20 ppm,shut the system down and leaveit undisturbed for up to 24 hours.Then flush all sub-mains andlaterals with fresh waster. Superchlorination will not dissolve orremove scale or inorganicsediment fouling.Do not connect any irrigation system, includinggreenhouse systems into which chlorine is to be added,to a public water system unless safety devicesprescribed by the state Department of Health, SafeDrinking Water Branch, for cross connectionprotection are in place.Agricultural Irrigation Systems(Continued)Ready-to-Use81987-1Drip, Trickle orSprinkler , VacuumRegulator, EjectorRefer to the Chlorine Manualpublished by the ChlorineInstitute for instructions on theDo not connect any irrigation system, includinggreenhouse systems into which chlorine is to be added,to a public water system unless safety devicesDocket Number: EPA-HQ-OPP-2010-0242www.regulations.gov69 of 69Use Site Formulation/EPA Reg. no.Method ofApplicationApplication Rate/ No. ofapplicationsUse LimitationsDevice required product use and safetyprocedures.prescribed by the state Department of Health, SafeDrinking Water Branch, for cross connectionprotection are in place.Drip Irrigation Systems PressurizedGas67799-1DispensingEquipmentNot Listed This product is intended to be used only by Seaccopersonnel or under the supervision and instruction ofSeaco Technologies. Refer to product bulletin(Seachlor 100 Chlorine Instructions Booklet) forspecific application instructions.Fountains, Ponds, andOrnamental LakesPressurizedGas37982-2Manually or FeederDeviceFountains, Ponds andOrnamental Lakes:Therecommended concentrationlevel of available chlorine for thecontrol of algae and slime infountains, ponds and ornamentallakes containing no fish orwildlife is 3-5 ppm.Do not chlorinate the pool within 24 hours prior todischarge.Reservoirs PressurizedGas37982-2HypochlorinatorAlgae Control in Reservoirs:Hypochlorinate streams feedingthe reservoir. Suitable feedingpoints should be selected oneach stream at least 50 yardsupstream from the points ofentry into the reservoir.Not ListedDecorative Lakes, Fountainsand PondsPressurizedGas56410-158618-1DispensingEquipmentHandle and use only inaccordance with practicerecommended in the ChlorineManual published by theChlorine Institute.Only specifically designeddispensing equipmentshould be used in accordance with the manufacturer’sinstructions and according tostate regulatory agencyrecommendations for dosages or residential chlorinelevels which should be maintained for each specificsite of application.