Docket Number EPA-HQ-OPP-2010-0117 

www.regulations.gov

Bentazon Summary Document 

Registration Review: Initial Docket 

March 2010 

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TABLE OF CONTENTS 

 Page # 

I. Preliminary Work Plan (PWP) 4 

II. Fact Sheet 11 

 

This Preliminary Work Plan and Fact Sheet summarize the Environmental Protection Agency’s 

current position based on the following documents: 

1. Registration Review – Preliminary Problem Formulation for Ecological Risk and 

Environmental Fate, Endangered Species, and Drinking Water Assessments for Sodium 

Bentazon (PC Code 103901), February 5, 2010. 

2. Bentazon. Human Health Assessment Scoping Document in Support of Registration 

Review, March 17, 2010. 

3. Food/Feed & Non-Food/Non-Feed Uses Considered in Registration Review Work Planning – 

Bentazon Sodium Salt (103901), July 20, 2009. 

4. Screening Level Usage Analysis (SLUA) – Bentazon Sodium Salt 103901, August 20, 2009. 

5. Bentazon Sodium Salt (103901) California DPR Usage Data, July 20, 2009. 

6. Updated Review of Bentazon Incident Reports, November 24, 2009. 

Additional supporting documents for the registration review of bentazon are located in docket EPAHQ-OPP-2010-0117 at www.regulations.gov. 
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I. PRELIMINARY WORK PLAN – Bentazon Sodium Salt 

Introduction

The Food Quality Protection Act of 1996 mandated a registration review program. All 

pesticides distributed or sold in the United States (U.S.) generally must be registered by the 

Environmental Protection Agency (EPA), based on scientific data showing that they will not cause 

unreasonable risks to human health or the environment when used as directed on product labeling. 

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 pesticide use practices will occur over time. Through the registration review program, 

the Agency periodically reevaluates 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/oppsrrd1/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 determine 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 registration 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 registration review decision. 

After reviewing and responding to comments and data received in the docket during this initial 

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

registration review of sodium bentazon (bentazon). 

Bentazon is a benzothiadiazole herbicide registered to control post-emergent broadleaf weeds 

and sedges in numerous agricultural field crops, and around trees and vines in various fruit and nut 

crops. Bentazon is also registered for use to control weeds in residential and recreational lawns 

around ornamental plants. The Reregistration Eligibility Decision (RED) for bentazon was 

completed in September 1994 (available at http://www.epa.gov/oppsrrd1/REDs/0182.pdf). In 2000, 

EPA reassessed tolerances of bentazon in compliance with the Food Quality Protection Act (FQPA). 

(65 Fed. Reg. 12122, March 8, 2000). 

In 2005, EPA received new use applications for bentazon for peaches and nectarines from 

Interregional Research Project No. 4 (IR-4). A dietary risk assessment was completed in 2006 that 

evaluated the proposed new uses and updated drinking water exposure estimates for registered uses 

of bentazon. This risk assessment showed that the existing uses of bentazon result in chronic dietary 

risk estimates of concern for infants. Most of the dietary bentazon exposure to infants is from 

drinking water. IR-4 subsequently withdrew the new use requests. EPA plans to begin working 

with the registrant this year to address the risk concerns identified from existing uses. 

Below is a summary of the issues relevant to the registration review of bentazon and the data 

the Agency plans to require. 
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Anticipated Risk Assessment and Data Needs

The Agency anticipates conducting a comprehensive ecological risk assessment, including an 

endangered species risk assessment, for all uses of bentazon. The Agency also anticipates revising 

dietary, residential, aggregate, and occupational risk assessments for all uses of bentazon. 

 

Ecological Risk:

• The most recent ecological risk assessment was completed in 2005 to support the proposed 

new use of bentazon to control weeds in peach and nectarine orchards. 

• In a refined risk assessment for the 1994 RED, EPA concluded that registered uses of 

bentazon would “not likely adversely affect” threatened and endangered mammals and birds. 

However, this assessment was not conducted pursuant to current policies. Accordingly, the 

Agency has not conducted a risk assessment that supports a complete endangered species 

determination. The ecological risk assessment planned during registration review will allow 

the Agency to determine whether bentazon’s use has “no effect” or “may 

affect” federally listed threatened or endangered species (listed species) or their 

designated critical habitats. 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 Service (the Services), as 

appropriate. 

• The Agency anticipates needing the following data in order to conduct a complete ecological 

risk assessment, including an endangered species assessment for bentazon:

• GDLN 850.1300 – Aquatic Invertebrate Life Cycle (freshwater) 

• GDLN 850.1400 – Fish Early Life-Stage (freshwater) 

• GDLN 850.2100 – Avian Acute Oral Toxicity, Passerine 

• GDLN 850.5400 – Aquatic Plant Growth (algal) (Tier II) 

• GDLN 835.6100 (7) – Environmental Chemistry Methods – soil 

• GDLN 835.6200 (7) – Environmental Chemistry Methods – sediment 

Please refer to Registration Review – Preliminary Problem Formulation for Ecological Risk and 

Environmental Fate, Endangered Species, and Drinking water Assessments for Sodium Bentazon 

(PC Code 103901) (February 5, 2010) for a more detailed discussion of the anticipated ecological 

risk assessment and data needs for bentazon. 

Human Health Risk: 

• The most recent human health risk assessment for bentazon was completed in 2006 to 

support the proposed new use of bentazon to control weeds in peach and nectarine orchards. 
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• The bentazon toxicity database is not complete. EPA anticipates requiring the following 

guideline studies to reevaluate toxicological endpoints for bentazon: 

o GDLN 870.7800 – Immunotoxicity 

o GDLN 870.6200 – Acute Neurotoxicity – Rat 

o GDLN 870.6200 – 90-day Neurotoxocity – Rat 

• The bentazon residue chemistry database is sufficient to support all current bentazon 

registrations. 

• The Agency anticipates conducting a complete dietary risk assessment, which includes a 

refined drinking water assessment, in registration review to incorporate updated estimated 

drinking water concentrations, updated percent crop treated information, and potential 

changes to toxicological endpoints and safety factors. 

• The Agency anticipates revising the bentazon residential risk assessment in registration 

review. A higher application rate (application by commercial applicators only) is registered 

for use on residential lawns and has not been assessed for post-application exposure. In 

addition, updated transfer coefficients are available for the post-application dermal 

assessment. Lastly, a golfer post-application assessment will need to be conducted as part of 

registration review. 

• The Agency anticipates revising the aggregate risk assessment in registration review to 

incorporate revised residential and dietary assessments as well as any new toxicological 

endpoints and safety factors. 

• The Agency anticipates revising the occupational risk assessment in registration review to 

incorporate revised toxicological endpoints and several handler and post-application 

exposure scenarios that have not been previously assessed. 

Please refer to Bentazon. Human Health Assessment Scoping Document in Support of 

Registration Review (March 17, 2010) available in the docket, for a detailed discussion of the 

anticipated human health risk assessment and data needs for bentazon. 

Other Data Needs: 

• GLDN 830.7050 UV/Visible Light Absorption – this study is a new data requirement under 

40 CFR part 158 (Product Chemistry Data Requirements) for registration of a pesticide (food 

and non-food uses). The Agency anticipates requiring this study to obtain basic information 

about the compound’s identity/composition and the wavelengths at which the compound may 

be susceptible to photochemical degradation.
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Endocrine Disruptor Screening Program

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

Program (EDSP) to determine whether certain substances (including pesticide active and other 

ingredients) may have an effect in humans or wildlife similar to an effect produced by a “naturally 

occurring estrogen, or other 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 substance 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. Tier 2 testing is designed to identify any adverse 

endocrine related effects caused by the substance, and establish a quantitative relationship between 

the dose and 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 contains 58 pesticide active ingredients and 9 inert ingredients. This list of 

chemicals was selected based on the potential for human exposure through pathways such as food 

and water, residential activity, and certain post-application agricultural scenarios. This list should 

not be construed as a list of known or likely endocrine disruptors. 

Bentazon is not among the group of 58 pesticide active ingredients on the initial list to be screened 

under the EDSP. Under FFDCA sec. 408(p) the Agency must screen all pesticide chemicals. 

Accordingly, EPA anticipates issuing future EDSP orders/data call-ins for all Registration Review 

cases, including those for which EPA has already opened a Registration Review docket 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/. 
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Timeline

 

The Agency has created the following estimated timeline for the completion of the bentazon 

registration review. 

Registration Review for Bentazon– Projected Registration Review Timeline

Activities Estimated Date 

Opening the docket 

Open Docket and Public Comment Period 2010 – March 

Close Public Comment 2010 – May 

Case Development 

Final Work Plan 2010 – August 

Issue DCI 2011 – April - June 

Data Submission 2013 – April - June 

Open Public Comment Period for Preliminary Risk Assessments 2014 – Oct. – Dec. 

Close Public Comment Period 2015 – Jan. - March 

Registration Review Decision 

Open Public Comment Period for Proposed Registration Review 

Decision 

 2015 – April - June 

Close Public Comment Period 2015 – July – Sept. 

Final Registration Review Decision and Begin Post-Decision Follow-up 2016 

Total (years) 6 

Guidance for Commenters

The public is invited to comment on EPA’s preliminary registration review work plan and rationale. 

The Agency will carefully consider all comments, as well as any additional information or data 

provided in a timely manner, prior to issuing a final work plan for the bentazon case. 

Trade Irritants: 

Through the registration review process, the 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 markets, providing as much specificity as 

possible regarding the nature of the concern.

Environmental Justice: 

EPA seeks to achieve environmental justice, the fair treatment and meaningful involvement of all 

people, regardless of race, color, national origin, or income, in the development, implementation, 

and enforcement of environmental laws, regulations, and policies. To help address potential 

environmental 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 factors, may have atypical, 
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unusually high exposure to bentazon 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. 

Water Quality: 

Bentazon 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/attains_nation_cy.cause_detail_303d?p_cause_group_id=885. 

In addition, no Total Maximum Daily Loads (TMDL) have been developed for bentazon, based on 

information provided at 

http://iaspub.epa.gov/tmdl_waters10/attains_nation.tmdl_pollutant_detail?p_pollutant_group_id=88

5&p_pollutant_group_name=PESTICIDES. More information on impaired water bodies and 

TMDLs can be found at http://www.epa.gov/owow/tmdl/. 

Possible chronic effects of long-term drinking water exposure prompted EPA's Office of Water to 

establish a lifetime Health Advisory (HA) of 200 parts per billion (ppb). However, bentazon is not 

regulated under the Safe Drinking Water Act (SDWA); no Maximum Contaminant Level (MCL) 

has been established, and water supply systems are not required to sample or analyze for its residues. 

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 Impaired Water Body and Other Water Quality Data in OPP’s Registration Review Risk 

Assessment and Management Process (see: 

http://www.epa.gov/oppsrrd1/registration_review/water_quality_sop.htm) in order to ensure they 

can be used quantitatively or qualitatively in pesticide risk assessments. 

Additional Information: 

Stakeholders are also specifically asked to provide information and data that will assist the Agency 

in refining risk assessments, including any species-specific ecological effects determinations. 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, application intervals, and maximum number of applications 

per season and per year 

f. geographic limitations on use 

2. Use or potential use distribution (e.g. geographical distribution of relevant uses). 

3. Use history. 

4. Median and 90th percentile reported use rates (lb/A, lb 1K sq.ft) from usage data – national, 

state and county. 
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5. Application timing (date of first application and application intervals) by use – national, 

state, and county. 

6. Usage/use information for non-agricultural uses. 

7. Directly acquired county-level usage data (not derived from state level data). 

a. maximum reported use rate (lb/A, lb 1K sq. ft) from usage data – county 

b. median and 90th percentile number of applications – county 

c. total pounds per year – county 

d. the year the pesticide was last used in the county/sub-county area 

e. the years in which the pesticide was applied in the county/sub-county area 

8. Typical application interval (days). 

9. State or local use restrictions. 

10. Ecological incidents specific to bentazon (non-target plant damage and avian, fish, reptilian, 

amphibian, mammalian mortalities, and bee or beneficial insect mortalities) not already 

reported to the Agency. 

11. Monitoring data. 

12. Bee toxicity data. 

Next Steps:

After the 60-day comment period closes, the Agency will consider and respond to any comments 

received in a Final Work Plan for bentazon, which will be issued in August 2010. 
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II. FACT SHEET 

 

Background Information:

• Bentazon registration review case number: 182 

• Bentazon PC Code: 103901; CAS # 25057-89-0 

• Bentazon was first registered in the United States in 1975 and was the subject of a 1994 

Reregistration Eligibility Decision. 

• Technical registrant: BASF Corporation. 

• There are 15 FIFRA Section 3 active product registrations, including one technical 

registration. 

• Pesticide Re-evaluation Division Contact: Joy Schnackenbeck (schnackenbeck.joy@epa.gov) 

• Registration Division Contact: Kathryn Montague (montague.kathryn@epa.gov) 

Use and Usage Information: (For additional details, please refer to Food/Feed & Non-Food/NonFeed Uses Considered in Registration Review Work Planning – Bentazon (103901), July 20, 2009, 

in the bentazon docket). 

• Bentazon is a postemergent herbicide registered for use to control broadleaf weeds and 

nutsedges on terrestrial food and feed crops, ornamental plants, residential lawns, and turf. 

• Agricultural uses of bentazon include alfalfa, nuts, almonds, apples, avocados, berries, 

cherries, figs, flax, clover, dry beans, green beans, cabbage, melons, corn, cucumbers, peas, 

mint, onions, peanuts, potatoes, pumpkins, rice, sorghum, sod, soybeans, squash, sugar beets, 

and tomatoes. 

• The largest agricultural uses of bentazon are on dry beans and soybeans with an estimated 

usage of 600,000 and 400,000 pounds of active ingredient, respectively. 

• Bentazon is formulated as a liquid and as a dry flowable water dispersible granule. 

• Bentazon can be applied by aircraft, band sprayer, ground sprayer, hand held sprayer, high 

pressure sprayer, hose-end sprayer, backpack sprayer, and pump-up sprayer.

Ecological Risk Assessment Status

Please refer to Registration Review – Preliminary Problem Formulation for Ecological Risk and 

Environmental Fate, Endangered Species, and Drinking water Assessments for Sodium Bentazon 

(PC Code 103901) (February 5, 2010) for a more detailed discussion of the anticipated ecological 

risk assessment and data needs for bentazon. A summary follows: 

• The primary environmental concerns identified in a 1993 screening level risk assessment for 

the 1994 RED were risks of concern to terrestrial plants in uplands and semi-aquatic habitats 

as well as chronic risk to birds. However, the chronic risk concern for birds was based on a 

supplemental study, in which the observed adverse effects were not statistically significant. 

• In 1994, EPA did a refinement of the screening-level risk assessment that was conducted for 

the RED. The 1994 assessment used exposure factors and scenarios that were more realistic 
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for actual bentazon use and potential exposures for endangered mammal and bird species. In 

this refined assessment, EPA concluded that registered uses of bentazon would “not likely 

adversely affect” threatened and endangered mammals and birds. 

• In 1997, new avian reproduction studies were completed and have been categorized as fully 

acceptable (MRID 44337801 and 44227402). These studies found no significant adverse effects 

at 800 ppm, the highest level tested. 

Human Health Risk Assessment Status

The following are key findings of the human health risk assessments conducted to support 

bentazon’s registered uses. Please refer to Bentazon. Human Health Assessment Scoping Document 

in Support of Registration Review (January 28, 2010) located in the docket for a detailed discussion 

of the human health risk assessment status. 

Hazard Characterization: 

• Bentazon has low acute toxicity via the oral, inhalation and dermal routes of exposure. 

Bentazon is irritating to the eye, slightly irritating to the skin, and is also a skin sensitizer. 

• Bentazon is classified as a group E carcinogen “evidence of non-carcinogenicity for 

humans.” This classification is based on the lack of evidence of carcinogenicity in mice and 

rats in a 1992 carcinogenicity study. 

• An FQPA 10x safety factor has been retained for assessing acute risk from dietary and 

residential exposure to females 13-49 years and for assessing chronic risk from dietary and 

residential exposure to all population subgroups. This decision was based on evidence of 

increased susceptibility following in utero exposure to bentazon in the prenatal 

developmental toxicity study in rats in the absence of maternal toxicity, and quantitative 

evidence of increased susceptibility following pre- and post- natal exposure to bentazon in 

the two-generation reproduction study in rats. 

Dietary: 

• In the 2006 dietary risk assessment conducted for the general U.S. population and all 

population subgroups, risk from acute dietary exposure (food + water) to females 13-49 did 

not exceed the Agency’s level of concern (<1% of the acute population adjusted dose 

(aPAD)). No acute dietary exposure assessment was performed for the general U.S. 

population (including infants and children) because no toxicological endpoint was applicable.

• However, the same 2006 dietary risk assessment did show chronic risk of concern to infants 

from registered bentazon uses (135% of the chronic population adjusted dose (cPAD)). 

Dietary exposure from drinking water alone for infants exceeded the Agency’s level of 

concern (115% of the cPAD). 

Residential and Recreational: 
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Handlers: 

• Residential handlers are likely to be exposed to bentazon residues via dermal and inhalation 

routes during mixing, loading, and application. EPA expects the duration of these exposures 

to be short-term (1-30 days). 

• In the most recent residential risk assessment completed in 1999, only short-term inhalation 

exposures were assessed because no short-term dermal toxicity was seen in a 21-day dermal 

toxicity study on rabbits. These exposures did not result in risks of concern. 

Post-application: 

• There is a potential for short- and intermediate-term post-application exposure to adults and 

toddlers from use of bentazon on residential lawns. 

• In the most recent residential risk assessment completed in 1999, only intermediate-term 

dermal exposure, and intermediate-term, non-dietary ingestion exposure for toddlers were 

assessed. These exposures did not result in risks of concern. Short-term non-dietary 

ingestion exposure to toddlers was not assessed because no toxicological endpoint was 

applicable. 

• However, this risk assessment did not incorporate residential post-application exposure from 

the highest registered application rate on turf, post application exposure to golfers and 

updated transfer coefficients. 

Aggregate:

• In the 2006 human health risk assessment, aggregate short- and intermediate-term risk did 

not exceed the Agency’s level of concern. 

• Aggregate long-term risk for infants did exceed the Agency’s level of concern based on 

dietary exposures from drinking water. 

Occupational: 

• In the 1994 RED for bentazon, the following crops/use sites were assessed: alfalfa, beans, 

corn, peanuts, peas, pepper, peppermint, rice, sorghum, soybeans, spearmint, and ornamental 

lawns and turf. Several occupational exposure assessments were also completed after the 

RED to evaluate new uses (flax, clover grown for seed and peas).

Handlers: 

• Occupational handlers are likely to be exposed to bentazon. Previous occupational 

assessments evaluating short- and intermediate-term exposure did not exceed the Agency’s 

level of concern. 

• However, several occupational handler scenarios have not been assessed previously. 

Post-application: 

• There is the potential for occupational post-application exposure to bentazon. Previous 

occupational assessments evaluating post-application exposure did not exceed the Agency’s 

level of concern. 

• However, several occupational post-application scenarios have not been assessed previously. 
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Cumulative: 

• EPA has not made a common mechanism of toxicity finding for bentazon and any other 

substances, and bentazon does not appear to produce a toxic metabolite produced by other 

substances. 

Human Studies

Past bentazon risk assessments rely in part on data in generic databases from studies in which adult 

human subjects were intentionally exposed to a pesticide to determine their dermal and inhalation 

exposure. Many such studies, involving exposure to many different pesticides, comprise generic 

pesticide exposure databases such as the Non-dietary Exposure Database and the Pesticide Handler 

Exposure Database. EPA has reviewed all the studies supporting these multi-pesticide generic 

exposure databases, and has found no clear and convincing evidence that any of them were either 

fundamentally unethical or significantly deficient relative to standards of ethical research conduct 

prevailing when they were conducted. There is no regulatory barrier to continued reliance on these 

studies, and all applicable requirements of EPA’s Rule for the Protection of Human Subjects of 

Research (40 CFR Part 26) have been satisfied.

Incidents

 

• In October 2009, a preliminary review of the Ecological Incident Information System (EIIS) 

Database identified only two incidents associated with bentazon. One incident was a bee kill 

in which residues of bentazon and the insecticide dimethoate were detected in the dead bees. 

Dimethoate is much more toxic to bees; therefore, the report classified this incident as 

“unlikely” for bentazon. The second incident in EIIS involved damage to a peanut crop from 

direct application of bentazon along with four other herbicides. This incident was classified 

as “possible” for bentazon. In addition to the incidents in EIIS, incidents were reported to the 

agency by registrants under FIFRA (6)(a)(2). There have been 39 aggregated minor plant 

incidents associated with sodium salt of bentazon and one minor plant incident associated 

with bentazon. The registrants have reported no minor fish and wildlife incidents and no 

minor other nontarget incidents. 

• On November 24, 2009, an updated review of bentazon human incident reports was prepared 

by consulting the OPP Incident Data System (IDS). In the United States, from 2002 to the 

present, two incidents were reported for the single chemical, bentazon. The symptoms 

appear generic and are not confirmed to be related to exposure. Based on the low number 

and low severity of human incident cases, there does not appear to be a risk concern that 

warrants future investigation. 

Tolerances and International Harmonization

U.S. tolerances for bentazon are listed under 40 CFR §180.355. The U.S., Mexico, Canadian, and 

Codex residue definitions for crops are harmonized. However, there are discrepancies between the 
15

U.S. and Codex residue definitions for livestock commodities. Additionally, there are several 

commodities for which the U.S. tolerances are not harmonized with other countries’ maximum 

residue limits (MRL). Specific limits which do not appear to be harmonized include: bean, 

succulent; corn, field, grain; corn, field, stover; flax, seed; pea, dry, seed; pea, succulent; rice, grain; 

sorghum, grain, grain; and milk. 

Data Call-In Status

A Data Call-In was issued in 1994 pursuant to the Bentazon RED. There is only one outstanding 

data requirement – a prospective ground water (PGW) study. In BASF’s 90-day DCI response, 

BASF submitted a waiver request and supporting water monitoring data for the PGW study. This 

data did not fulfill the PGW data requirement. However, this wavier request was never formally 

granted or denied. On January 5, 2010, BASF submitted a new waiver request for this study and 

new additional ground water monitoring information generated by various federal and state agencies. 

The Agency is currently reviewing this waiver request and will issue a response this spring.

Labels

Active Section 3 labels for bentazon can be obtained from the Pesticide Product Label System 

(PPLS) website: http://oaspub.epa.gov/pestlabl/ppls.home.