[Federal Register Volume 88, Number 219 (Wednesday, November 15, 2023)]
[Notices]
[Pages 78454-78456]
[FR Doc No: 2023-25196]

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DEPARTMENT OF TRANSPORTATION

Federal Motor Carrier Safety Administration

[Docket No. FMCSA-2023-0153]

Agency Information Collection Activities; Request for OMB
Approval To Renew an Information Collection Request: Truck and Bus
Maintenance Requirements and Their Impact on Safety

AGENCY: Federal Motor Carrier Safety Administration (FMCSA), Department
of Transportation (DOT).

ACTION: Notice and request for comments.

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SUMMARY: In accordance with the Paperwork Reduction Act of 1995, FMCSA
announces its plan to submit the Information Collection Request (ICR)
described below to the Office of Management and Budget (OMB) for review
and approval. The Federal Motor Carrier Safety Administration (FMCSA)
is authorized to study vehicle maintenance to determine the impact of
vehicle maintenance requirements on overall motor carrier safety. FMCSA
may fund research, development, and technology projects that improve
the safety and efficiency of commercial motor vehicle operations
through technological innovation and improvement.

DATES: Comments on this notice must be received on or before December
15, 2023.

ADDRESSES: Written comments and recommendations for the proposed
information collection should be sent within 30 days of publication of
this notice to www.reginfo.gov/public/do/PRAMain. Find this information
collection by selecting ``Currently under 30-day Review--Open for
Public Comments'' or by using the search function.

FOR FURTHER INFORMATION CONTACT: Mike Lukuc, Program Manager,
Technology Division, DOT, FMCSA, West Building 6th Floor, 1200 New
Jersey Avenue SE, Washington, DC 20590-0001;<PHONE_NUMBER>;
[email protected].

SUPPLEMENTARY INFORMATION: In this study, FMCSA will collect, via two
surveys of freight motor carriers and passenger carrier maintenance
managers, qualitative and quantitative data to assess the opinions of
carrier representatives to develop an operational definition of
``systematic maintenance'' for trucks and buses, examine maintenance
differences between vehicle classes, and identify industry maintenance
norms. Survey results of those carriers with low crash and vehicle
maintenance violation rates will be combined to provide guidance on
recommended practices. Additionally, respondents from carriers with
high rates of crashes and violations may provide useful feedback on the
effect of the interventions within their maintenance programs or
activities, and an evaluation of adequacy of current regulations. The
information collected by the survey will be a critical input to the
Recommended Practices Report, which is a required final product for the
project. Three comments were received in response to the 60-day Federal
Register notice.
    Title: Truck and Bus Maintenance Requirements and Their Impact on
Safety.
    OMB Control Number: 2126-0069.
    Type of Request: Renewal of a currently approved ICR.
    Respondents: Freight motor carriers and passenger carriers.
    Estimated Number of Respondents: 578 respondents [578 respondents
will complete the Online Recruitment Survey. Of those 578 respondents,
289 will also complete the Carrier Maintenance Manager Survey].
    Estimated Time per Response: Varies [Online Recruitment Survey: 5
minutes. Carrier Maintenance Manager Survey: 45 minutes].
    Expiration Date: November 30, 2023.
    Frequency of Response: Annually.
    Estimated Total Annual Burden: 265 hours [Online Recruitment
Survey: 578 respondents x (5 minutes / 60 minutes) = 48 hours; Carrier
Maintenance Manager Survey: 289 respondents x (45 minutes / 60 minutes)
= 217 hours].
    Background: FMCSA's core mission is to reduce crashes, injuries,
and fatalities involving large trucks and buses. To aid in
accomplishing this, the Agency uses

the Compliance, Safety, Accountability (CSA) enforcement program to
prioritize and target interventions of those motor carriers who are
most likely to be involved in a future crash. As part of the CSA
program, the Agency deploys the Safety Measurement System (SMS). SMS
uses inspection, crash, and investigation data captured in the Motor
Carrier Management Information System to calculate a percentile for
each motor carrier. A motor carrier's SMS percentile is based on its
past compliance with a complete range of safety-based regulations (such
as driver safety, hours of service, driver fitness, and vehicle
maintenance, among others). The survey described in this notice focuses
on the vehicle maintenance component of those safety regulations. The
study goal is to determine what improvements, ranging from better
compliance interventions to better vehicle maintenance requirements,
would enhance motor carrier safety.
    In 2014, the John A. Volpe National Transportation Systems Center
conducted a study to assess the effectiveness of SMS in identifying the
highest risk motor carriers to be targeted for interventions. One
finding from the study was that motor carriers targeted for
intervention due to ``vehicle maintenance'' issues (i.e., violations)
had a 65 percent higher crash rate compared to the national average.
These violations are based on Federal and State inspections of
components critical to the safe operation of the vehicle. It is
important to recognize that proper and regular preventative maintenance
(i.e., systematic maintenance programs) among carriers--rather than
Federal and State inspections, which are by nature limited to the most
visible or obvious safety-related components--should be the primary
activity applied to ensure safe equipment operation. While these
initial findings are important, they raise additional questions. One
such question is prompted by the stipulation in 49 CFR 396.3(a), which
states that every carrier must have a program to ``systematically
inspect, repair, and maintain, or cause to be systematically inspected,
repaired, and maintained, all motor vehicles and intermodal equipment
subject to its control.'' Though this regulation provides some
direction, there is no supporting definition of the word systematic,
and because this term is subjective, it is likely to vary from one
carrier to another. The lack of specificity regarding standard
intervals for preventative maintenance makes it difficult for Federal
and State personnel to evaluate the effectiveness of and compliance
with a carrier's maintenance program. Furthermore, the lack of
specificity may make it difficult for carriers to ascertain and
therefore comply with the regulation's intent.
    The current research effort, augmented by the proposed survey, is
necessary to improve FMCSA's understanding of the safety impact of
preventative vehicle maintenance and to clarify the requirements of
Sec.  396.3(a). The study objectives are as follows:
    1. Develop an operational definition of systematic maintenance.
    2. Evaluate whether current regulations and the intervention
process could be modified to improve compliance with vehicle
maintenance requirements. Examples of such requirements are as follows:
(i) Preventative maintenance intervals, (ii) preventative maintenance
inspections with adequately trained/equipped mechanics, and (iii)
adequacy of motor carriers' maintenance facilities. However, the
results of the survey will be used only to explore what areas of
rulemaking and/or other areas, such as policy guidance and training,
might be useful in the future; the results of the survey will not be
used for rulemaking, per se.
    3. Gather information to assist in establishing minimum standards
for inspection intervals, mechanic qualifications and training, and
certification of maintenance facilities. FMCSA is authorized to conduct
this research under 49 U.S.C. 31108, Motor Carrier Research and
Technology Programs. Under section 31108(a)(3)(C), FMCSA may fund
research, development, and technology projects that improve the safety
and efficiency of commercial motor vehicle operations through
technological innovation and improvement. This information collection
supports the DOT strategic goal of Safety.
    Under contract to FMCSA, the Virginia Tech Transportation Institute
(VTTI) at the Virginia Polytechnic Institute and State University will
use online surveys to obtain the data required to address the study
objectives. The information collection will be administered in two
phases:
    Phase I: Online Recruitment Survey. This voluntary, seven-question
survey will screen carriers and verify their eligibility for Phase II
participation. To be eligible for Phase II participation, carriers must
fall into one of two groups: (a) The Recommended Practices (RP) Group,
which includes carriers with the lowest Vehicle Maintenance and Crash
Indicator Behavior Analysis and Safety Improvement Categories (BASIC)
percentiles (i.e., less than or equal to the 33rd percentile); or (b)
the Intervention Effects (IE) Group, which includes carriers that have
experienced Federal or State interventions in the last 24 months due to
vehicle maintenance violations. The BASICs are Unsafe Driving, Crash
Indicator, Hours-of-Service (HOS) compliance, Vehicle Maintenance,
Controlled Substances/Alcohol, Hazardous Materials (HM) Compliance, and
Driver Fitness. More information on the SMS methodology can be found at
https://csa.fmcsa.dot.gov/Documents/SMSMethodology.pdf.
    Phase II: Carrier Maintenance Management Survey. This voluntary,
108-question survey will include questions about demographics;
maintenance practices, intervals, personnel, and facilities; and State
and Federal inspections, among other things. The Phase II survey will
employ branch logic; as such, carriers will be prompted to complete
different sections based on their survey group (and for one section,
carrier size). Consequently, no participating carrier will be asked to
complete all 108 questions. In the Phase II survey, carriers (of all
sizes) in the RP Group will be asked to provide additional information
about maintenance personnel and facilities (e.g., mechanic training
levels, tools required for adequate inspection, and certification of
facilities) and vehicle maintenance issues that may impact safety.
Information from the RP Group will seek to address Objective 1,
relating to development of an operational definition of systematic
maintenance, Objective 2, relating to potential regulatory changes, and
Objective 3, relating to establishment of minimum standards for
inspection intervals, mechanic qualifications and training, and
certification of maintenance facilities. Carriers in the IE Group will
be asked to complete the section on intervention effects, which
includes questions about the status of active interventions or
investigations; results of closed interventions or investigations;
interactions with State versus Federal agencies; intervention
activities experienced; the accuracy of violations leading to
interventions; actions taken in response to interventions; changes in
carrier vehicle maintenance practices as a result of an intervention;
significant benefits of interventions; and ways the intervention
process could be improved. Information provided by the IE Group will
also address the portion of Objective 2 regarding sufficiency of
regulations and where interventions need to be improved to facilitate
complying with these regulations.

    Survey responses will be summarized and reported using plots,
tables, content analysis, and calculated summary statistics. Plots and
tables will provide a visual comparison of multiple choice and checkbox
survey responses for successful carriers (i.e., carriers in the RP
Group) and those receiving interventions in the last 24 months (i.e.,
carriers in the IE Group). These methods will also allow researchers to
summarize responses by carrier operation type (i.e., truck or bus) and
size. Bar charts will be used to plot responses to many survey
questions. Some survey responses may be summarized with tables with
rows for each of the carrier operation types (truck or bus) and each
carrier-size subgroup. To explore and summarize responses to open-ended
survey questions, researchers will use content analysis methods. An
illustration of an open-ended question in the survey is ``List examples
of critical safety-related maintenance activities for trailer vehicle
milestones.'' The goal of content analysis of open-ended questions will
be to identify common answers.
    The results of this information collection will be documented in a
technical report to be delivered to and published by FMCSA. In
addition, the results will be used to create a ``recommended best
practices'' report that will outline minimum standards for inspection
intervals, mechanic qualifications and training, and certification of
maintenance facilities. Finally, VTTI is required under the contract
with FMCSA to compile and analyze the collected information and develop
a public-use data set.
    If this data collection does not take place, the truck and bus
industry would continue to operate with the uncertainty of what a
``systematic maintenance'' program, as currently worded in Sec.
396.3(a), consists of. This term's ambiguous definition makes it
difficult for Federal and State inspectors to evaluate the
effectiveness of a carrier's maintenance program or its compliance with
this provision. Furthermore, this uncertainty may make it difficult for
carriers to ascertain and therefore comply with the regulation's
intent.
    The 60-day notice for this collection was published on August 24,
2023 (88 FR 58057). The Agency received three comments.
    The first comment was anonymous and asserted that fraud within the
industry affected the industry's ability to perform maintenance that
could enhance safety. Through the research enabled by this survey, the
Agency seeks to assess the degree to which maintenance enhances safety.
    The second comment was from a maintenance trainer who stated that
49 CFR 396.17 requires that periodic inspections beyond visual
observation are required on an annual basis to certify that each
vehicle passes maintenance requirements. The Agency agrees that
periodic maintenance inspections that go beyond roadside visual
inspections are an important part of a systematic maintenance program,
and the research is taking into consideration the elements of periodic
maintenance that impact carrier preventative maintenance programs.
    The third comment was from the National Waste and Recycling
Association (NWRA). NWRA suggests that the survey should recruit
carriers that operate vocational short-haul trucks (e.g., refuse
hauler) because of the differences in duty cycles that affect
maintenance. In particular, waste and recycling vehicles brake
frequently as part of their duty cycle, which may have implications for
maintenance and safety. The Agency agrees that a variety of highway and
vocational truck and bus carriers will be recruited for the survey, but
the recruitment and collection will be constrained to identifying
carriers based on the recommended practices group and intervention
effects group criteria.
    Public Comments Invited: You are asked to comment on any aspect of
this information collection, including: (1) whether the proposed
collection is necessary for the performance of FMCSA's functions; (2)
the accuracy of the estimated burden; (3) ways for FMCSA to enhance the
quality, usefulness, and clarity of the collected information; and (4)
ways that the burden could be minimized without reducing the quality of
the collected information.

    Issued under the authority of 49 CFR 1.87.
Thomas P. Keane,
Associate Administrator, Office of Research and Registration.
[FR Doc. 2023-25196 Filed 11-14-23; 8:45 am]
BILLING CODE 4910-EX-P


kale, mustard) 30 350 20 15 1.3 0.78 Wettable Powders for Groundboom application ( 43) 0.13 8.6 Soil band treatment ( broccoli,

Chinese, broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 30 80 4.5 67 0.29 3.4 Wettable Powders for Chemigation application ( 44) 0.13 8.6 Commercial/ industrial lawns 40.80 10 0.76 400 0.050 20 Wettable Powders for High Pressure HandWand application ( 45) 0.13 8.6 Commercial/ industrial lawns 0.50 1000 gals 0.93 320 0.061 16 Wettable Powders for Groundboom application ( 46) 0.13 8.6 Cotton 2 200 0.74 400 0.049 20 Wettable Powders for Chemigation application ( 47) 0.13 8.6 Cotton 2 350 1.3 230 0.086 12 Wettable Powders for Chemigation application ( 48) 0.13 8.6 Golf course turf ( tees and greens) 40.80 10 0.76 400 0.050 20 Wettable Powders for Chemigation application ( 49) 0.13 8.6 Golf course turf ( fairways) 40.80 40 3 99 0.20 5 Wettable Powders for Chemigation application ( 50) 0.13 8.6 Sod farms 40.80 350 27 11 1.8 0.57 Wettable Powders for Groundboom application ( 51) 0.13 8.6 Sod farms 40.80 80 6.1 49 0.40 2.5 Wettable Powders for Groundboom application ( 52) 0.13 8.6 Peanuts 2 80 0.30 1000 0.020 51 Wettable Powders for Chemigation application ( 53) 0.13 8.6 Peanuts 2 350 1.3 230 0.086 12 Wettable Powders for Groundboom application ( 54) 0.13 8.6 Pepper, tomato 7.50 80 1.1 270 0.074 14 Wettable Powders for Groundboom application ( 55) 0.13 8.6 Pine ( seed orchard) 37.50 10 0.70 430 0.046 22 Applicator Sprays for High Pressure HandWand application ( 56) 0.36 16 containerized nursery tock, soil drench ( beans, brussels sprouts,

cabbage, cauliflower) 0.0038 1000 gals 0.019 16000 0.00086 1200 Sprays for High Pressure HandWand application ( 57) 0.36 16 commercial/ industrial lawns,

residential lawn 0.04 1000 gals 0.19 1600 0.0086 120 Sprays for High Pressure HandWand application ( 58) 0.36 16 ornamentals ( foliar application only) 1.50 1000 gals 7.7 39 0.34 2.9 Sprays for High Pressure HandWand application ( 59) 0.36 16 containerized nursery stock soil drench ( pepper, tomato) 0.0038 1000 gals 0.019 16000 0.00086 1200 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 105 Sprays for Groundboom application ( 60) 0.011 0.15 Soil band treatment ( broccoli,

brussels sprouts, cabbage,

cauliflower) 30 80 0.38 800 0.0051 190 Sprays for Groundboom application ( 61) 0.011 0.15 Cotton 2 200 0.063 4800 0.00086 1200 Sprays for Groundboom application ( 62) 0.011 0.15 Peanuts 11.59 80 0.15 2100 0.0020 500 Sprays for Groundboom application ( 63) 0.011 0.15 Band treatment ( dried beans,

succulent beans, lima) 2 80 0.025 12000 0.00034 2900 Sprays for Groundboom application ( 64) 0.011 0.15 Band treatment, soil treatment ( garlic) 20 80 0.25 1200 0.0034 290 Sprays for High Pressure HandWand application ( 65) 0.36 16 commercial industrial lawn 0.15 1000 gals 0.77 390 0.034 29 Sprays for Groundboom application ( 66) 0.011 0.15 Cotton 2 200 0.063 4800 0.00086 1200 Sprays for Groundboom application ( 67) 0.011 0.15 Garlic 20 80 0.25 1200 0.0034 290 Sprays for Groundboom application ( 68) 0.011 0.15 Peanuts 10 80 0.13 2400 0.0017 580 Sprays for Groundboom application ( 69) 0.011 0.15 Potato 25 80 0.31 950 0.0043 230 Sprays for Aerial application ( 70) No Data No Data potato 25 350 No Data No Data No Data No Data Sprays for Groundboom application ( 71) 0.011 0.15 Soil band treatment ( broccoli,

Chinese broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 30 80 0.38 800 0.0051 190 Sprays for High Pressure HandWand application ( 72) 0.36 16 containerized stock ( broccoli,

Chinese broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 0.02 1000 gals 0.077 3900 0.0034 290 Sprays for Airblast application ( 73) 0.22 0.9 Foliar spray ( magnolia tree) 6 20 0.38 800 0.0015 650 Sprays for Groundboom application ( 74) 0.011 0.15 Tomato, pepper 7.50 80 0.094 3200 0.0013 780 Sprays for Groundboom application ( 75) 0.011 0.15 Southern pine ( seed orchard) 42.50 10 0.067 4500 0.00091 1100 Applying Granulars for Tractor Drawn Spreaders application ( 76) 0.0042 0.24 Beans 1.50 80 0.0072 42000 0.00041 2400 Applying Granulars for Tractor Drawn Spreaders application ( 77) 0.0042 0.24 Soil band treatment ( broccoli,

brussels sprouts, cabbage,

cauliflower, collards, kale,

mustard) 30 80 0.14 2100 0.0082 120 Applying Granulars for Tractor Drawn Spreaders application ( 78) 0.0042 0.24 Golf course turf ( tees/ greens) 43.56 10 0.026 11000 0.0015 670 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 106 Applying Granulars for Tractor Drawn Spreaders application ( 79) 0.0042 0.24 Golf course turf ( fairways) 43.56 40 0.10 2900 0.0060 170 Applying Granulars for Tractor Drawn Spreaders application ( 80) 0.0042 0.24 Sod farms 43.56 80 0.21 1400 0.012 84 Applying Granulars for Tractor Drawn Spreaders application ( 81) 0.0042 0.24 Cotton 2 200 0.024 13000 0.0014 730 Applying Granulars for Tractor Drawn Spreaders application ( 82) 0.0042 0.24 Peanuts 2 80 0.0096 31000 0.00055 1800 Applying Granulars for Tractor Drawn Spreaders application ( 83) 0.0042 0.24 Pepper 1.35 80 0.0065 46000 0.00037 2700 Applying Granulars for Tractor Drawn Spreaders application ( 84) 0.0042 0.24 Potato 25 80 0.12 2500 0.0069 150 Sprays for Groundboom application ( 85) 0.011 0.15 Beans( lima, snap, dried) 1.50 80 0.019 16000 0.00026 3900 Sprays for Groundboom application ( 86) 0.011 0.15 Soil band treatment ( broccoli,

Chinese, broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 30 80 0.38 800 0.0051 190 Sprays for High Pressure HandWand application ( 87) 0.36 16 commercial/ industrial lawns 0.50 1000 gals 2.6 120 0.11 8.8 Sprays for Groundboom application ( 88) 0.011 0.15 Cotton 2 200 0.063 4800 0.00086 1200 Sprays for Groundboom application ( 89) 0.011 0.15 Sod farms 40.80 80 0.51 580 0.0070 140 Sprays for Groundboom application ( 89a) 0.011 0.15 Sod farms 32.67 80 0.41 730 0.0056 180 Sprays for Groundboom application ( 90) 0.011 0.15 Peanuts 2 80 0.025 12000 0.00034 2900 Sprays for Groundboom application ( 91) 0.011 0.15 Pepper, tomato 7.50 80 0.094 3200 0.0013 780 Sprays for Groundboom application ( 92) 0.011 0.15 Pine ( seed orchard) 37.50 10 0.059 5100 0.00080 1200 Flagger Flagging for Sprays application ( 93) 0.01 0.07 Potato 25 350 1.3 240 0.0088 110 Mixer/ Loader/ App Mixing/ Loading/ Applying Liquids for Handgun ( lawn) Sprayer ( ORETF) application ( 94) 0.25 No Data ornamentals ( herbaceous plants,

woody shrubs and vines) 218 5 3.9 77 No Data No Data Mixing/ Loading/ Applying Liquids for Handgun ( lawn) Sprayer ( ORETF) application ( 95) 0.25 No Data ornamental and Lawn turf 32.67 5 0.58 510 No Data No Data Loading/ Applying Granulars for Push type spreader ( ORETF)

application ( 96) 0.11 No Data commercial industrial lawns 43.56 5 0.34 880 No Data No Data Loading/ Applying Granulars for Belly Grinder application ( 97) No Data 12 ornamental lawns and turf 43.56 0.5 No Data No Data 0.0037 270 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 107 Loading/ Applying Granulars for Belly Grinder application ( 98) No Data 12 ornamentals ( shade trees,

herbaceous, woody shrubs and vines) 217.80 0.5 No Data No Data 0.019 54 Loading/ Applying Granulars for Push type spreader ( ORETF)

application ( 99) 0.11 No Data ornamentals ( shade trees,

herbaceous, woody shrubs and vines) 217.80 0.5 0.17 1800 No Data No Data Mixing/ Loading/ Applying Wet Powders for Low Pressure Handwand application ( 100) 6.2 220 ornamental ( woody shrubs and vines, herbaceous plants) 217.80 5 gals 96 3.1 3.4 0.29 Mixing/ Loading/ Applying Wet Powders for Low Pressure Handwand application ( 101) 6.2 220 ornamental ( shade trees) 37.50 5 gals 17 18 0.59 1.7 1PPE5 dermal unit exposures represent coveralls worn over long pants and long sleeved shirts plus chemical resistant gloves. Values are reported in the PHED Surrogate Exposure Guide dated August 1998 2PPE5 inhalation unit exposures represent a dust/ mist respirator with a protection factor of 5. Values are reported in the PHED Surrogate Exposure Guide dated August 1998 or are from data submitted by the Outdoor Residential Exposure Task Force dated May 2000.

3Crops and use patterns are from PCNB labels 4Application rates are based on maximum values found in various sources including LUIS and various labels. In most scenarios, a range of maximum application rates is used to represent the range of rates for different crops/ sites/ uses. Most application rates upon which the analysis is based are presented as lb ai/ A. In some cases, the application rate is based on applying a solution at concentrations specified by the label ( i. e., presented as lb ai/ gallon).

5Amount treated is based on the area or gallons that can be reasonably applied in a single day for each exposure scenario of concern based on the application method and formulation/ packaging type. ( Standard EPA/ OPP/ HED values).

6Dermal dose ( mg/ kg/ day) = [ unit exposure ( mg/ lb ai) * Dermal absorption ( 100%) * Application rate ( lb ai/ acre or lb ai/ gallon) * Daily area treated ( acres or gallons)] / Body weight ( 70 kg).

7Dermal MOE = short term and intermediate term endpoint for dermal NOAEL ( 300 mg/ kg/ day) / Daily Dermal Dose. Target Dermal MOE is 100.

8Inhalation dose ( mg/ kg/ day) = [ unit exposure ( ug/ lb ai) * 0.001 mg/ g unit conversion * Inhalation absorption ( 100%) * Application rate ( lb ai/ acre or lb ai/ gallon) * Daily area treated ( acres or gallons)] / Body weight ( 70 kg).

9Inhalation MOE = short term and intermediate term endpoint for inhalation NOAEL ( 1 mg/ kg/ day) / Daily Inhalation Dose. Target Inhalation MOE is 100.

Table B7: Short Term and Intermediate Term Risk with PPE 6 ( Double Layer Protection, Gloves, PF10 Respirator) for PCNB 108 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 Mixer/ Loader Dry Flowables for High Pressure HandWand application ( 1) 0.047 0.077 containerized nursery stock, soil drench ( beans, brussels sprouts,

cabbage, cauliflower) 0.0038 1000 gals 0.0025 120000 0.0000041 240000 Dry Flowables for Chemigation application ( 2) 0.047 0.077 commercial/ industrial lawns 32.67 10 0.22 1400 0.00036 2800 Dry Flowables for High Pressure HandWand application ( 3) 0.047 0.077 commercial/ industrial lawns,

residential lawn 0.04 1000 gals 0.025 12000 0.000041 24000 Dry Flowables for Chemigation application ( 4) 0.047 0.077 golf course turf ( tees/ greens) 32.67 10 0.22 1400 0.00036 2800 Dry Flowables for Chemigation application ( 5) 0.047 0.077 golf course turf ( fairways) 32.67 40 0.88 340 0.0014 700 Dry Flowables for Chemigation application ( 6) 0.047 0.077 sod farms 32.67 350 7.7 39 0.013 80 Dry Flowables for High Pressure HandWand application ( 7) 0.047 0.077 ornamentals ( herbaceous plants,

woody shrubs and vines) 1.50 1000gals 1 300 0.0017 610 Dry Flowables for High Pressure HandWand application ( 8) 0.047 0.077 containerized nursery stock, soil drench ( pepper, tomato) 0.0038 1000 gals 0.0025 120000 0.0000041 240000 Dry Flowables for Groundboom application ( 9) 0.047 0.077 soil band treatment ( broccoli,

brussels sprouts, cabbage,

cauliflower) 30 80 1.6 190 0.0026 380 Dry Flowables for Groundboom application ( 10) 0.047 0.077 cotton 2 200 0.27 1100 0.00044 2300 Dry Flowables for Groundboom application ( 11) 0.047 0.077 peanuts 11.59 80 0.62 480 0.0010 980 Mixing/ Loading Liquids for Groundboom application ( 12) 0.017 0.12 Band treatment ( dried beans,

succulent beans, lima) 2 80 0.039 7700 0.00027 3600 Mixing/ Loading Liquids for Groundboom application ( 13) 0.017 0.12 Band treatment, soil treatment ( garlic) 20 80 0.39 770 0.0027 360 Mixing/ Loading Liquids for Chemigation application ( 14) 0.017 0.12 Ornamental lawn and turf 32.67 5 0.040 7600 0.00028 3600 Mixing/ Loading Liquids for Chemigation application ( 15) 0.017 0.12 Commercial/ industrial lawns 32.67 10 0.079 3800 0.00056 1800 Mixing/ Loading Liquids for Chemigation application ( 16) 0.017 0.12 Sod farms 32.67 350 2.8 110 0.020 51 Mixing/ Loading Liquids for Groundboom application ( 16a) 0.017 0.12 Sod farms 32.67 80 0.63 470 0.0045 220 Mixing/ Loading Liquids for Chemigation application ( 17) 0.017 0.12 Golf course turf 32.67 10 0.079 3800 0.00056 1800 Mixing/ Loading Liquids for Chemigation application ( 18) 0.017 0.12 Golf course turf ( fairways) 32.67 40 0.32 950 0.0022 450 Mixing/ Loading Liquids for High Pressure HandWand application ( 19) 0.017 0.12 Commercial industrial lawn 0.15 1000 gals 0.036 8200 0.00026 3900 Mixing/ Loading Liquids for Groundboom application ( 20) 0.017 0.12 Cotton 2 200 0.097 3100 0.00069 1500 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 109 Mixing/ Loading Liquids for Groundboom application ( 21) 0.017 0.12 Garlic 20 80 0.39 770 0.0027 360 Mixing/ Loading Liquids for Groundboom application ( 22) 0.017 0.12 Peanuts 10 80 0.19 1500 0.0014 730 Mixing/ Loading Liquids for Groundboom application ( 23) 0.017 0.12 Potato 25 80 0.49 620 0.0034 290 Mixing/ Loading Liquids for Chemigation application ( 24) 0.017 0.12 Potato 25 350 2.1 140 0.015 67 Mixing/ Loading Liquids for Aerial application ( 25) 0.017 0.12 Potato 25 350 2.1 140 0.015 67 Mixing/ Loading Liquids for Groundboom application ( 26) 0.017 0.12 Soil band treatment ( broccoli,

Chinese broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 30 80 0.58 510 0.0041 240 Mixing/ Loading Liquids for High Pressure HandWand application ( 27) 0.017 0.12 Containerized stock ( broccoli,

Chinese broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 0.02 1000 gals 0.0036 82000 0.000026 39000 Mixing/ Loading Liquids for Airblast application ( 28) 0.017 0.12 Foliar spray ( magnolia tree) 6 20 0.029 10000 0.00021 4900 Mixing/ Loading Liquids for Groundboom application ( 29) 0.017 0.12 Tomato, pepper 7.50 80 0.15 2100 0.0010 970 Mixing/ Loading Liquids for Groundboom application ( 30) 0.017 0.12 Southern pine ( seed orchard) 42.50 10 0.10 2900 0.00073 1400 Mixing/ Loading Liquids for Dip tank application ( 31) 0.017 0.12 Ornamental bulb soak and cut flowers 0.02 100 gals 0.00036 820000 0.0000026 390000 Loading Granulars for Tractor Drawn Spreaders application ( 32) 0.0034 0.17 Beans 1.50 80 0.0058 51000 0.00029 3400 Loading Granulars for Tractor Drawn Spreaders application ( 33) 0.0034 0.17 Soil band treatment ( broccoli,

brussels sprouts, cabbage,

cauliflower, collards, kale,

mustard) 30 80 0.12 2600 0.0058 170 Loading Granulars for Tractor Drawn Spreaders application ( 34) 0.0034 0.17 Golf course turf ( tees/ greens) 43.56 10 0.021 14000 0.0011 950 Loading Granulars for Tractor Drawn Spreaders application ( 35) 0.0034 0.17 Golf course turf ( fairways) 43.56 40 0.085 3500 0.0042 240 Loading Granulars for Tractor Drawn Spreaders application ( 36) 0.0034 0.17 Sod farms 43.56 80 0.17 1800 0.0085 120 Loading Granulars for Tractor Drawn Spreaders application ( 37) 0.0034 0.17 Cotton 2 200 0.019 15000 0.00097 1000 Loading Granulars for Tractor Drawn Spreaders application ( 38) 0.0034 0.17 Pepper 1.35 80 0.0052 57000 0.00026 3800 Loading Granulars for Tractor Drawn Spreaders application ( 39) 0.0034 0.17 Potato 25 80 0.097 3100 0.0049 210 Wettable Powders for Groundboom application ( 40) 0.13 4.3 Beans( lima, snap, dried) 1.50 80 0.22 1300 0.0074 140 Wettable Powders for Chemigation application ( 41) 0.13 4.3 Beans( lima, snap, dried) 1.50 350 0.98 310 0.032 31 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 110 Wettable Powders for Chemigation application ( 42) 0.13 4.3 Soil band treatment ( broccoli,

Chinese, broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 30 350 20 15 0.65 1.6 Wettable Powders for Groundboom application ( 43) 0.13 4.3 Soil band treatment ( broccoli,

Chinese, broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 30 80 4.5 67 0.15 6.8 Wettable Powders for Chemigation application ( 44) 0.13 4.3 Commercial/ industrial lawns 40.80 10 0.76 400 0.025 40 Wettable Powders for High Pressure HandWand application ( 45) 0.13 4.3 Commercial/ industrial lawns 0.50 1000 gals 0.93 320 0.031 33 Wettable Powders for Groundboom application ( 46) 0.13 4.3 Cotton 2 200 0.74 400 0.025 41 Wettable Powders for Chemigation application ( 47) 0.13 4.3 Cotton 2 350 1.3 230 0.043 23 Wettable Powders for Chemigation application ( 48) 0.13 4.3 Golf course turf ( tees and greens) 40.80 10 0.76 400 0.025 40 Wettable Powders for Chemigation application ( 49) 0.13 4.3 Golf course turf ( fairways) 40.80 40 3 99 0.10 1.00 Wettable Powders for Chemigation application ( 50) 0.13 4.3 Sod farms 40.80 350 27 11 0.88 1.1 Wettable Powders for Groundboom application ( 51) 0.13 4.3 Sod farms 40.80 80 6.1 49 0.20 5 Wettable Powders for Groundboom application ( 52) 0.13 4.3 Peanuts 2 80 0.30 1000 0.0098 100 Wettable Powders for Chemigation application ( 53) 0.13 4.3 Peanuts 2 350 1.3 230 0.043 23 Wettable Powders for Groundboom application ( 54) 0.13 4.3 Pepper, tomato 7.50 80 1.1 270 0.037 27 Wettable Powders for Groundboom application ( 55) 0.13 4.3 Pine ( seed orchard) 37.50 10 0.70 430 0.023 43 Applicator Sprays for High Pressure HandWand application ( 56) 0.36 7.9 Containerized nursery stock,

soil drench ( beans, brussels sprouts, cabbage, cauliflower) 0.0038 1000 gals 0.019 16000 0.00042 2400 Sprays for High Pressure HandWand application ( 57) 0.36 7.9 Commercial/ industrial lawns,

residential lawn 0.04 1000 gals 0.19 1600 0.0042 240 Sprays for High Pressure HandWand application ( 58) 0.36 7.9 ornamentals ( foliar application only) 1.50 1000 gals 7.7 39 0.17 5.9 Sprays for High Pressure HandWand application ( 59) 0.36 7.9 Containerized nursery stock,

soil drench ( pepper, tomato) 0.0038 1000 gals 0.019 16000 0.00042 2400 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 111 Sprays for Groundboom application ( 60) 0.011 0.074 soil band treatment ( broccoli,

brussels sprouts, cabbage,

cauliflower) 30 80 0.38 800 0.0025 390 Sprays for Groundboom application ( 61) 0.011 0.074 cotton 2 200 0.063 4800 0.00042 2400 Sprays for Groundboom application ( 62) 0.011 0.074 peanuts 11.59 80 0.15 2100 0.00098 1000 Sprays for Groundboom application ( 63) 0.011 0.074 band treatment ( dried beans,

succulent beans, lima) 2 80 0.025 12000 0.00017 5900 Sprays for Groundboom application ( 64) 0.011 0.074 band treatment, soil treatment ( garlic) 20 80 0.25 1200 0.0017 590 Sprays for High Pressure HandWand application ( 65) 0.36 7.9 Commercial industrial lawn 0.15 1000 gals 0.77 390 0.017 59 Sprays for Groundboom application ( 66) 0.011 0.074 cotton 2 200 0.063 4800 0.00042 2400 Sprays for Groundboom application ( 67) 0.011 0.074 garlic 20 80 0.25 1200 0.0017 590 Sprays for Groundboom application ( 68) 0.011 0.074 peanuts 10 80 0.13 2400 0.00085 1200 Sprays for Groundboom application ( 69) 0.011 0.074 potato 25 80 0.31 950 0.0021 470 Sprays for Aerial application ( 70) No Data No Data potato 25 350 No Data No Data No Data No Data Sprays for Groundboom application ( 71) 0.011 0.074 soil band treatment ( broccoli,

Chinese broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 30 80 0.38 800 0.0025 390 Sprays for High Pressure HandWand application ( 72) 0.36 7.9 Containerized stock ( broccoli,

Chinese broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 0.02 1000 gals 0.077 3900 0.0017 590 Sprays for Airblast application ( 73) 0.22 0.45 Foliar spray ( magnolia tree) 6 20 0.38 800 0.00077 1300 Sprays for Groundboom application ( 74) 0.011 0.074 tomato, pepper 7.50 80 0.094 3200 0.00063 1600 Sprays for Groundboom application ( 75) 0.011 0.074 southern pine ( seed orchard) 42.50 10 0.067 4500 0.00045 2200 Applying Granulars for Tractor Drawn Spreaders application ( 76) 0.0042 0.12 Beans 1.50 80 0.0072 42000 0.00021 4900 Applying Granulars for Tractor Drawn Spreaders application ( 77) 0.0042 0.12 Soil band treatment ( broccoli,

brussels sprouts, cabbage,

cauliflower, collards, kale,

mustard) 30 80 0.14 2100 0.0041 240 Applying Granulars for Tractor Drawn Spreaders application ( 78) 0.0042 0.12 Golf course turf ( tees/ greens) 43.56 10 0.026 11000 0.00075 1300 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 112 Applying Granulars for Tractor Drawn Spreaders application ( 79) 0.0042 0.12 Golf course turf ( fairways) 43.56 40 0.10 2900 0.0030 330 Applying Granulars for Tractor Drawn Spreaders application ( 80) 0.0042 0.12 Sod farms 43.56 80 0.21 1400 0.0060 170 Applying Granulars for Tractor Drawn Spreaders application ( 81) 0.0042 0.12 Cotton 2 200 0.024 13000 0.00069 1500 Applying Granulars for Tractor Drawn Spreaders application ( 82) 0.0042 0.12 Peanuts 2 80 0.0096 31000 0.00027 3600 Applying Granulars for Tractor Drawn Spreaders application ( 83) 0.0042 0.12 Pepper 1.35 80 0.0065 46000 0.00019 5400 Applying Granulars for Tractor Drawn Spreaders application ( 84) 0.0042 0.12 Potato 25 80 0.12 2500 0.0034 290 Sprays for Groundboom application ( 85) 0.011 0.074 beans( lima, snap, dried) 1.50 80 0.019 16000 0.00013 7900 Sprays for Groundboom application ( 86) 0.011 0.074 soil band treatment ( broccoli,

Chinese, broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 30 80 0.38 800 0.0025 390 Sprays for High Pressure HandWand application ( 87) 0.36 7.9 Commercial/ industrial lawns 0.50 1000 gals 2.6 120 0.056 18 Sprays for Groundboom application ( 88) 0.011 0.074 cotton 2 200 0.063 4800 0.00042 2400 Sprays for Groundboom application ( 89) 0.011 0.074 sod farms 40.80 80 0.51 580 0.0035 290 Sprays for Groundboom application ( 89a) 0.011 0.074 sod farms 32.67 80 0.41 730 0.0028 360 Sprays for Groundboom application ( 90) 0.011 0.074 Peanuts 2 80 0.025 12000 0.00017 5900 Sprays for Groundboom application ( 91) 0.011 0.074 pepper, tomato 7.50 80 0.094 3200 0.00063 1600 Sprays for Groundboom application ( 92) 0.011 0.074 pine ( seed orchard) 37.50 10 0.059 5100 0.00040 2500 Flagger Flagging for Sprays application ( 93) 0.01 0.035 potato 25 350 1.3 240 0.0044 230 Mixer/ Loader/ App Mixing/ Loading/ Applying Liquids for Handgun ( lawn) Sprayer ( ORETF) application ( 94) 0.25 No Data ornamentals ( herbaceous plants,

woody shrubs and vines) 218 5 3.9 77 No Data No Data Mixing/ Loading/ Applying Liquids for Handgun ( lawn) Sprayer ( ORETF) application ( 95) 0.25 No Data ornamental and turf 32.67 5 0.58 510 No Data No Data Loading/ Applying Granulars for Push type spreader ( ORETF)

application ( 96) 0.11 No Data commercial industrial lawns 43.56 5 0.34 880 No Data No Data Loading/ Applying Granulars for Belly Grinder application ( 97) No Data 6.2 Ornamental lawns and turf 43.56 0.5 No Data No Data 0.0019 520 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 113 Loading/ Applying Granulars for Belly Grinder application ( 98) No Data 6.2 Ornamentals ( shade trees,

herbaceous, woody shrubs and vines) 217.80 0.5 No Data No Data 0.0096 100 Loading/ Applying Granulars for Push type spreader ( ORETF)

application ( 99) 0.11 No Data ornamentals ( shade trees,

herbaceous, woody shrubs and vines) 217.80 0.5 0.17 1800 No Data No Data Mixing/ Loading/ Applying Wet Powders for Low Pressure Handwand application ( 100) 6.2 110 ornamental ( woody shrubs and vines, herbaceous plants) 217.80 5 gals 96 3.1 1.7 0.58 Mixing/ Loading/ Applying Wet Powders for Low Pressure Handwand application ( 101) 6.2 110 ornamental ( shade trees) 37.50 5 gals 17 18 0.29 3.4 1PPE6 dermal unit exposures represent coveralls worn over long pants and long sleeved shirts plus chemical resistant gloves. Values are reported in the PHED Surrogate Exposure Guide dated August 1998 2PPE6 inhalation unit exposures represent an organic vapor removing respirator with a protection factor of 10. Values are reported in the PHED Surrogate Exposure Guide dated August 1998 or are from data submitted by the Outdoor Residential Exposure Task Force dated May 2000.

3Crops and use patterns are from PCNB labels 4Application rates are based on maximum values found in various sources including LUIS and various labels. In most scenarios, a range of maximum application rates is used to represent the range of rates for different crops/ sites/ uses. Most application rates upon which the analysis is based are presented as lb ai/ A. In some cases, the application rate is based on applying a solution at concentrations specified by the label ( i. e., presented as lb ai/ gallon).

5Amount treated is based on the area or gallons that can be reasonably applied in a single day for each exposure scenario of concern based on the application method and formulation/ packaging type. ( Standard EPA/ OPP/ HED values).

6Dermal dose ( mg/ kg/ day) = [ unit exposure ( mg/ lb ai) * Dermal absorption ( 100%) * Application rate ( lb ai/ acre or lb ai/ gallon) * Daily area treated ( acres or gallons)] / Body weight ( 70 kg).

7Dermal MOE = short term and intermediate term endpoint for dermal NOAEL ( 300 mg/ kg/ day) / Daily Dermal Dose. Target Dermal MOE is 100.

8Inhalation dose ( mg/ kg/ day) = [ unit exposure ( ug/ lb ai) * 0.001 mg/ g unit conversion * Inhalation absorption ( 100%) * Application rate ( lb ai/ acre or lb ai/ gallon) * Daily area treated ( acres or gallons)] / Body weight ( 70 kg).

9Inhalation MOE = short term and intermediate term endpoint for inhalation NOAEL ( 1 mg/ kg/ day) / Daily Inhalation Dose. Target Inhalation MOE is 100.

Table B8: Short Term and Intermediate Term Risk with Eng Control for PCNB 114 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 Mixer/ Loader Dry Flowables for High Pressure HandWand application ( 1) No Data No Data containerized nursery stock, soil drench ( beans, brussels sprouts,

cabbage, cauliflower) 0.0038 1000 gals No Data No Data No Data No Data Dry Flowables for Chemigation application ( 2) No Data No Data commercial/ industrial lawns 32.67 10 No Data No Data No Data No Data Dry Flowables for High Pressure HandWand application ( 3) No Data No Data commercial/ industrial lawns,

residential lawn 0.04 1000 gals No Data No Data No Data No Data Dry Flowables for Chemigation application ( 4) No Data No Data golf course turf ( tees/ greens) 32.67 10 No Data No Data No Data No Data Dry Flowables for Chemigation application ( 5) No Data No Data golf course turf ( fairways) 32.67 40 No Data No Data No Data No Data Dry Flowables for Chemigation application ( 6) No Data No Data sod farms 32.67 350 No Data No Data No Data No Data Dry Flowables for High Pressure HandWand application ( 7) No Data No Data ornamentals ( herbaceous plants,

woody shrubs and vines) 1.50 1000gals No Data No Data No Data No Data Dry Flowables for High Pressure HandWand application ( 8) No Data No Data containerized nursery stock, soil drench ( pepper, tomato) 0.0038 1000 gals No Data No Data No Data No Data Dry Flowables for Groundboom application ( 9) No Data No Data soil band treatment ( broccoli,

brussels sprouts, cabbage,

cauliflower) 30 80 No Data No Data No Data No Data Dry Flowables for Groundboom application ( 10) No Data No Data cotton 2 200 No Data No Data No Data No Data Dry Flowables for Groundboom application ( 11) No Data No Data peanuts 11.59 80 No Data No Data No Data No Data Mixing/ Loading Liquids for Groundboom application ( 12) 0.0086 0.083 band treatment ( dried beans,

succulent beans, lima) 2 80 0.020 15000 0.00019 5300 Mixing/ Loading Liquids for Groundboom application ( 13) 0.0086 0.083 band treatment, soil treatment ( garlic) 20 80 0.20 1500 0.0019 530 Mixing/ Loading Liquids for Chemigation application ( 14) 0.0086 0.083 ornamental lawn and turf 32.67 5 0.020 15000 0.00019 5200 Mixing/ Loading Liquids for Chemigation application ( 15) 0.0086 0.083 commercial/ industrial lawns 32.67 10 0.040 7500 0.00039 2600 Mixing/ Loading Liquids for Chemigation application ( 16) 0.0086 0.083 Sod farms 32.67 350 1.4 210 0.014 74 Mixing/ Loading Liquids for Groundboom application ( 16a) 0.0086 0.083 Sod farms 32.67 80 0.32 930 0.0031 320 Mixing/ Loading Liquids for Chemigation application ( 17) 0.0086 0.083 golf course turf 32.67 10 0.040 7500 0.00039 2600 Mixing/ Loading Liquids for Chemigation application ( 18) 0.0086 0.083 golf course turf ( fairways) 32.67 40 0.16 1900 0.0015 650 Mixing/ Loading Liquids for High Pressure HandWand application ( 19) 0.0086 0.083 commercial industrial lawn 0.15 1000 gals 0.018 16000 0.00018 5600 Mixing/ Loading Liquids for Groundboom application ( 20) 0.0086 0.083 cotton 2 200 0.049 6100 0.00047 2100 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 115 Mixing/ Loading Liquids for Groundboom application ( 21) 0.0086 0.083 garlic 20 80 0.20 1500 0.0019 530 Mixing/ Loading Liquids for Groundboom application ( 22) 0.0086 0.083 peanuts 10 80 0.098 3100 0.00095 1100 Mixing/ Loading Liquids for Groundboom application ( 23) 0.0086 0.083 potato 25 80 0.25 1200 0.0024 420 Mixing/ Loading Liquids for Chemigation application ( 24) 0.0086 0.083 potato 25 350 1.1 280 0.010 96 Mixing/ Loading Liquids for Aerial application ( 25) 0.0086 0.083 potato 25 350 1.1 280 0.010 96 Mixing/ Loading Liquids for Groundboom application ( 26) 0.0086 0.083 soil band treatment ( broccoli,

Chinese broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 30 80 0.29 1000 0.0028 350 Mixing/ Loading Liquids for High Pressure HandWand application ( 27) 0.0086 0.083 containerized stock ( broccoli,

Chinese broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 0.02 1000 gals 0.0018 160000 0.000018 56000 Mixing/ Loading Liquids for Airblast application ( 28) 0.0086 0.083 foliar spray ( magnolia tree) 6 20 0.015 20000 0.00014 7000 Mixing/ Loading Liquids for Groundboom application ( 29) 0.0086 0.083 tomato, pepper 7.50 80 0.074 4100 0.00071 1400 Mixing/ Loading Liquids for Groundboom application ( 30) 0.0086 0.083 southern pine ( seed orchard) 42.50 10 0.052 5700 0.00050 2000 Mixing/ Loading Liquids for Dip tank application ( 31) 0.0086 0.083 ornamental bulb soak and cut flowers 0.02 100 gals 0.00018 160000 0 0.0000018 560000 Loading Granulars for Tractor Drawn Spreaders application ( 32) 0.00017 0.034 beans 1.50 80 0.00029 100000 0 0.000058 17000 Loading Granulars for Tractor Drawn Spreaders application ( 33) 0.00017 0.034 soil band treatment ( broccoli,

brussels sprouts, cabbage,

cauliflower, collards, kale,

mustard) 30 80 0.0058 51000 0.0012 860 Loading Granulars for Tractor Drawn Spreaders application ( 34) 0.00017 0.034 golf course turf ( tees/ greens) 43.56 10 0.0011 280000 0.00021 4700 Loading Granulars for Tractor Drawn Spreaders application ( 35) 0.00017 0.034 golf course turf ( fairways) 43.56 40 0.0042 71000 0.00085 1200 Loading Granulars for Tractor Drawn Spreaders application ( 36) 0.00017 0.034 sod farms 43.56 80 0.0085 35000 0.0017 590 Loading Granulars for Tractor Drawn Spreaders application ( 37) 0.00017 0.034 cotton 2 200 0.00097 310000 0.00019 5100 Loading Granulars for Tractor Drawn Spreaders application ( 38) 0.00017 0.034 pepper 1.35 80 0.00026 110000 0 0.000052 19000 Loading Granulars for Tractor Drawn Spreaders application ( 39) 0.00017 0.034 potato 25 80 0.0049 62000 0.00097 1000 Wettable Powders for Groundboom application ( 40) 0.0098 0.24 Beans( lima, snap, dried) 1.50 80 0.017 18000 0.00041 2400 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 116 Wettable Powders for Chemigation application ( 41) 0.0098 0.24 Beans( lima, snap, dried) 1.50 350 0.074 4100 0.0018 560 Wettable Powders for Chemigation application ( 42) 0.0098 0.24 Soil band treatment ( broccoli,

Chinese, broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 30 350 1.5 200 0.036 28 Wettable Powders for Groundboom application ( 43) 0.0098 0.24 Soil band treatment ( broccoli,

Chinese, broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 30 80 0.34 890 0.0082 120 Wettable Powders for Chemigation application ( 44) 0.0098 0.24 Commercial/ industrial lawns 40.80 10 0.057 5300 0.0014 710 Wettable Powders for High Pressure HandWand application ( 45) 0.0098 0.24 Commercial/ industrial lawns 0.50 1000 gals 0.07 4300 0.0017 580 Wettable Powders for Groundboom application ( 46) 0.0098 0.24 Cotton 2 200 0.056 5400 0.0014 730 Wettable Powders for Chemigation application ( 47) 0.0098 0.24 Cotton 2 350 0.098 3100 0.0024 420 Wettable Powders for Chemigation application ( 48) 0.0098 0.24 Golf course turf ( tees and greens) 40.80 10 0.057 5300 0.0014 710 Wettable Powders for Chemigation application ( 49) 0.0098 0.24 Golf course turf ( fairways) 40.80 40 0.23 1300 0.0056 180 Wettable Powders for Chemigation application ( 50) 0.0098 0.24 Sod farms 40.80 350 2 150 0.049 20 Wettable Powders for Groundboom application ( 51) 0.0098 0.24 Sod farms 40.80 80 0.46 660 0.011 89 Wettable Powders for Groundboom application ( 52) 0.0098 0.24 Peanuts 2 80 0.022 13000 0.00055 1800 Wettable Powders for Chemigation application ( 53) 0.0098 0.24 Peanuts 2 350 0.098 3100 0.0024 420 Wettable Powders for Groundboom application ( 54) 0.0098 0.24 Pepper, tomato 7.50 80 0.084 3600 0.0021 490 Wettable Powders for Groundboom application ( 55) 0.0098 0.24 Pine ( seed orchard) 37.50 10 0.053 5700 0.0013 780 Applicator Sprays for High Pressure HandWand application ( 56) No Data No Data containerized nursery stock, soil drench ( beans, brussels sprouts,

cabbage, cauliflower) 0.0038 1000 gals No Data No Data No Data No Data Sprays for High Pressure HandWand application ( 57) No Data No Data commercial/ industrial lawns,

residential lawn 0.04 1000 gals No Data No Data No Data No Data Sprays for High Pressure HandWand application ( 58) No Data No Data ornamentals ( foliar application only) 1.50 1000 gals No Data No Data No Data No Data Sprays for High Pressure HandWand application ( 59) No Data No Data containerized nursery stock, soil drench ( pepper, tomato) 0.0038 1000 gals No Data No Data No Data No Data Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 117 Sprays for Groundboom application ( 60) 0.005 0.043 soil band treatment ( broccoli,

brussels sprouts, cabbage,

cauliflower) 30 80 0.17 1800 0.0015 680 Sprays for Groundboom application ( 61) 0.005 0.043 cotton 2 200 0.029 11000 0.00025 4100 Sprays for Groundboom application ( 62) 0.005 0.043 peanuts 11.59 80 0.066 4500 0.00057 1800 Sprays for Groundboom application ( 63) 0.005 0.043 band treatment ( dried beans,

succulent beans, lima) 2 80 0.011 26000 0.000098 10000 Sprays for Groundboom application ( 64) 0.005 0.043 band treatment, soil treatment ( garlic) 20 80 0.11 2600 0.00098 1000 Sprays for High Pressure HandWand application ( 65) No Data No Data commercial industrial lawn 0.15 1000 gals No Data No Data No Data No Data Sprays for Groundboom application ( 66) 0.005 0.043 cotton 2 200 0.029 11000 0.00025 4100 Sprays for Groundboom application ( 67) 0.005 0.043 garlic 20 80 0.11 2600 0.00098 1000 Sprays for Groundboom application ( 68) 0.005 0.043 peanuts 10 80 0.057 5300 0.00049 2000 Sprays for Groundboom application ( 69) 0.005 0.043 potato 25 80 0.14 2100 0.0012 810 Sprays for Aerial application ( 70) 0.005 0.068 potato 25 350 0.63 480 0.0085 120 Sprays for Groundboom application ( 71) 0.005 0.043 soil band treatment ( broccoli,

Chinese broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 30 80 0.17 1800 0.0015 680 Sprays for High Pressure HandWand application ( 72) No Data No Data containerized stock ( broccoli,

Chinese broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 0.02 1000 gals No Data No Data No Data No Data Sprays for Airblast application ( 73) 0.019 0.45 Foliar spray ( magnolia tree) 6 20 0.033 9200 0.00077 1300 Sprays for Groundboom application ( 74) 0.005 0.043 tomato, pepper 7.50 80 0.043 7000 0.00037 2700 Sprays for Groundboom application ( 75) 0.005 0.043 southern pine ( seed orchard) 42.50 10 0.030 9900 0.00026 3800 Applying Granulars for Tractor Drawn Spreaders application ( 76) 0.0021 0.22 Beans 1.50 80 0.0036 83000 0.00038 2700 Applying Granulars for Tractor Drawn Spreaders application ( 77) 0.0021 0.22 Soil band treatment ( broccoli,

brussels sprouts, cabbage,

cauliflower, collards, kale,

mustard) 30 80 0.072 4200 0.0075 130 Applying Granulars for Tractor Drawn Spreaders application ( 78) 0.0021 0.22 Golf course turf ( tees/ greens) 43.56 10 0.013 23000 0.0014 730 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 118 Applying Granulars for Tractor Drawn Spreaders application ( 79) 0.0021 0.22 Golf course turf ( fairways) 43.56 40 0.052 5700 0.0055 180 Applying Granulars for Tractor Drawn Spreaders application ( 80) 0.0021 0.22 Sod farms 43.56 80 0.10 2900 0.011 91 Applying Granulars for Tractor Drawn Spreaders application ( 81) 0.0021 0.22 Cotton 2 200 0.012 25000 0.0013 800 Applying Granulars for Tractor Drawn Spreaders application ( 82) 0.0021 0.22 Peanuts 2 80 0.0048 63000 0.00050 2000 Applying Granulars for Tractor Drawn Spreaders application ( 83) 0.0021 0.22 Pepper 1.35 80 0.0032 93000 0.00034 2900 Applying Granulars for Tractor Drawn Spreaders application ( 84) 0.0021 0.22 Potato 25 80 0.06 5000 0.0063 160 Sprays for Groundboom application ( 85) 0.005 0.043 beans( lima, snap, dried) 1.50 80 0.0086 35000 0.000074 14000 Sprays for Groundboom application ( 86) 0.005 0.043 soil band treatment ( broccoli,

Chinese, broccoli, brussels sprouts, cabbage, Chinese cabbage, cauliflower, collards,

kale, mustard) 30 80 0.17 1800 0.0015 680 Sprays for High Pressure HandWand application ( 87) No Data No Data commercial/ industrial lawns 0.50 1000 gals No Data No Data No Data No Data Sprays for Groundboom application ( 88) 0.005 0.043 cotton 2 200 0.029 11000 0.00025 4100 Sprays for Groundboom application ( 89) 0.005 0.043 sod farms 40.80 80 0.23 1300 0.0020 500 Sprays for Groundboom application ( 89a) 0.005 0.043 sod farms 32.67 80 0.19 1600 0.0016 620 Sprays for Groundboom application ( 90) 0.005 0.043 Peanuts 2 80 0.011 26000 0.000098 10000 Sprays for Groundboom application ( 91) 0.005 0.043 pepper, tomato 7.50 80 0.043 7000 0.00037 2700 Sprays for Groundboom application ( 92) 0.005 0.043 pine ( seed orchard) 37.50 10 0.027 11000 0.00023 4300 Flagger Flagging for Sprays application ( 93) 0.00022 0.007 potato 25 350 0.028 11000 0.00088 1100 Mixer/ Loader/ App Mixing/ Loading/ Applying Liquids for Handgun ( lawn) Sprayer ( ORETF) application ( 94) No Data No Data ornamentals ( herbaceous plants,

woody shrubs and vines) 218 5 No Data No Data No Data No Data Mixing/ Loading/ Applying Liquids for Handgun ( lawn) Sprayer ( ORETF) application ( 95) No Data No Data ornamental and lawn turf 32.67 5 No Data No Data No Data No Data Loading/ Applying Granulars for Push type spreader ( ORETF)

application ( 96) No Data No Data commercial industrial lawns 43.56 5 No Data No Data No Data No Data Loading/ Applying Granulars for Belly Grinder application ( 97) No Data No Data ornamental lawns and turf 43.56 0.5 No Data No Data No Data No Data Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 lbai/ A or lb ai/ gal Daily Area Treated5 A or gals Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 119 Loading/ Applying Granulars for Belly Grinder application ( 98) No Data No Data ornamentals ( shade trees,

herbaceous, woody shrubs and vines) 217.80 0.5 No Data No Data No Data No Data Loading/ Applying Granulars for Push type spreader ( ORETF)

application ( 99) No Data No Data ornamentals ( shade trees,

herbaceous, woody shrubs and vines) 217.80 0.5 No Data No Data No Data No Data Mixing/ Loading/ Applying Wet Powders for Low Pressure Handwand application ( 100) No Data No Data ornamental ( woody shrubs and vines, herbaceous plants) 217.80 5 gals No Data No Data No Data No Data Mixing/ Loading/ Applying Wet Powders for Low Pressure Handwand application ( 101) No Data No Data ornamental ( shade trees) 37.50 5 gals No Data No Data No Data No Data 1Engineering controls dermal unit exposures represent long pants and long sleeved shirts. For mixers and loaders, chemical resistant gloves are also included. Values are reported in the PHED Surrogate Exposure Guide dated August 1998 2Engineering controls inhalation unit exposures represent no respirator. Values are reported in the PHED Surrogate Exposure Guide dated August 1998 or are from data submitted by the Outdoor Residential Exposure Task Force dated May 2000.

3Crops and use patterns are from PCNB labels 4Application rates are based on maximum values found in various sources including LUIS and various labels. In most scenarios, a range of maximum application rates is used to represent the range of rates for different crops/ sites/ uses. Most application rates upon which the analysis is based are presented as lb ai/ A. In some cases, the application rate is based on applying a solution at concentrations specified by the label ( i. e., presented as lb ai/ gallon).

5Amount treated is based on the area or gallons that can be reasonably applied in a single day for each exposure scenario of concern based on the application method and formulation/ packaging type. ( Standard EPA/ OPP/ HED values).

6Dermal dose ( mg/ kg/ day) = [ unit exposure ( mg/ lb ai) * Dermal absorption ( 100%) * Application rate ( lb ai/ acre or lb ai/ gallon) * Daily area treated ( acres or gallons)] / Body weight ( 70 kg).

7Dermal MOE = short term and intermediate term endpoint for dermal NOAEL ( 300 mg/ kg/ day) / Daily Dermal Dose. Target Dermal MOE is 100.

8Inhalation dose ( mg/ kg/ day) = [ unit exposure ( ug/ lb ai) * 0.001 mg/ g unit conversion * Inhalation absorption ( 100%) * Application rate ( lb ai/ acre or lb ai/ gallon) * Daily area treated ( acres or gallons)] / Body weight ( 70 kg).

9Inhalation MOE = insert short term and intermediate term endpoint for inhalation NOAEL( 1 mg/ kg/ day) / Daily Inhalation Dose. Target Inhalation MOE is 100.

Table B9: Occupational Seed Treatment Handler Short, Intermediate term Exposure from PCNB at Baseline 120 Exposure Scenario Crop Baseline Dermal Unit Exposure ( mg/ lb ai) a Baseline Inhalation Unit Exposure ( µ g/ lb ai) b Application Rate c lb ai/ lbs of seed Daily amount Treatedd or planted ( pounds) Daily Dermal Dose Daily Inhalation Dose Dermal MOE Inhalation MOE Loader/ Applicator ( 1) Barley 0.023 0.34 0.001307 718000 0.308 0.005 973 219 Bean 0.000523 575000 0.099 0.001 3036 685 Corn 0.000523 550000 0.095 0.001 3174 716 Cotton 0.000788 160000 0.041 0.001 7242 1633 Oats 0.001957 718000 0.462 0.007 650 147 Pea 0.001045 575000 0.197 0.003 1520 343 Peanut 0.000610 120000 0.024 0.000 12473 2813 Rice 0.001391 718000 0.328 0.005 914 206 Safflower 0.000610 718000 0.144 0.002 2085 470 Sorghum 0.000305 718000 0.072 0.001 4169 940 Soybeans 0.001045 575000 0.197 0.003 1520 343 Sugar beet 0.001873 120000 0.074 0.001 4062 916 Wheat 0.000525 718000 0.124 0.002 2422 546 Bagger ( 2) Barley 0.0091 0.16 0.001307 718000 0.122 0.002 2459 466 Bean 0.000523 575000 0.039 0.001 7674 1455 Corn 0.000523 550000 0.037 0.001 8023 1521 Cotton 0.000788 160000 0.016 0.000 18303 3470 Oats 0.001957 718000 0.183 0.003 1642 311 Pea 0.001045 575000 0.078 0.001 3841 728 Peanut 0.000610 120000 0.010 0.000 31526 5977 Rice 0.001391 718000 0.130 0.002 2311 438 Safflower 0.000610 718000 0.057 0.001 5269 999 Exposure Scenario Crop Baseline Dermal Unit Exposure ( mg/ lb ai) a Baseline Inhalation Unit Exposure ( µ g/ lb ai) b Application Rate c lb ai/ lbs of seed Daily amount Treatedd or planted ( pounds) Daily Dermal Dose Daily Inhalation Dose Dermal MOE Inhalation MOE 121 Sorghum 0.000305 718000 0.028 0.001 10538 1998 Soybeans 0.001045 575000 0.078 0.001 3841 728 Sugar beet 0.001873 120000 0.029 0.001 10267 1947 Wheat 0.000525 718000 0.049 0.001 6122 1161 Sewer ( 3) Barley 0.0062 0.23 0.001307 718000 0.083 0.003 3609 324 Bean 0.000523 575000 0.027 0.001 11263 1012 Corn 0.000523 550000 0.025 0.001 11775 1058 Cotton 0.000788 160000 0.011 0.000 26865 2414 Oats 0.001957 718000 0.124 0.005 2411 217 Pea 0.001045 575000 0.053 0.002 5637 507 Peanut 0.000610 120000 0.006 0.000 46272 4158 Rice 0.001391 718000 0.088 0.003 3391 305 Safflower 0.000610 718000 0.039 0.001 7734 695 Sorghum 0.000305 718000 0.019 0.001 15467 1390 Soybeans 0.001045 575000 0.053 0.002 5637 507 Sugar beet 0.001873 120000 0.020 0.001 15070 1354 Wheat 0.000525 718000 0.033 0.001 8986 807 Multiple activities ( 4) Barley 0.042 1.6 0.001307 718000 0.563 0.021 533 47 Bean 0.000523 575000 0.180 0.007 1663 146 Corn 0.000523 550000 0.173 0.007 1738 152 Cotton 0.000788 160000 0.076 0.003 3966 347 Oats 0.001957 718000 0.843 0.032 356 31 Exposure Scenario Crop Baseline Dermal Unit Exposure ( mg/ lb ai) a Baseline Inhalation Unit Exposure ( µ g/ lb ai) b Application Rate c lb ai/ lbs of seed Daily amount Treatedd or planted ( pounds) Daily Dermal Dose Daily Inhalation Dose Dermal MOE Inhalation MOE 122 Pea 0.001045 575000 0.361 0.014 832 73 Peanut 0.000610 120000 0.044 0.002 6831 598 Rice 0.001391 718000 0.599 0.023 501 44 Safflower 0.000610 718000 0.263 0.010 1142 100 Sorghum 0.000305 718000 0.131 0.005 2283 200 Soybeans 0.001045 575000 0.361 0.014 832 73 Sugar beet 0.001873 120000 0.135 0.005 2225 195 Wheat 0.000525 718000 0.226 0.009 1326 116 On Farm Planter box ( 5) Barley 12.6 1.2 0.000878 7200 1.138 0.000 264 9228 Bean 0.000750 4000 0.540 0.000 556 19444 Corn 0.000558 1440 0.145 0.000 2074 72597 Cotton 0.000150 1200 0.032 0.000 9259 324074 3200 0.086 0.000 3472 121528 Oats 0.000604 7200 0.783 0.000 383 13414 Pea 0.001042 6400 1.200 0.000 250 8747 Peanut 0.000750 9280 1.253 0.000 240 8381 Rice 0.000926 12000 2.000 0.000 150 5250 Safflower NA NA NA NA NA NA Sorghum NA NA NA NA NA NA Soybeans 0.001044 4800 0.090 0.000 3326 116406 Sugar beet 0.000625 400 0.045 0.000 6667 233333 Wheat 0.000521 9600 0.900 0.000 333 11663 Exposure Scenario Crop Baseline Dermal Unit Exposure ( mg/ lb ai) a Baseline Inhalation Unit Exposure ( µ g/ lb ai) b Application Rate c lb ai/ lbs of seed Daily amount Treatedd or planted ( pounds) Daily Dermal Dose Daily Inhalation Dose Dermal MOE Inhalation MOE 123 Planters Barley 0.25 3.4 0.001307 18000 0.084 0.001 3571 875 Bean 0.000523 10000 0.019 0.000 16061 3937 Corn 0.000523 3600 0.00672 0.000 44614 10935 Cotton 0.000788 3000 0.008 0.000 35533 8709 8000 0.023 0.000 13325 3266 Oats 0.001957 18000 0.126 0.002 2385 585 Pea 0.001045 6400 0.024 0.000 12560 3078 Peanut 0.000610 9280 0.020 0.000 14839 3637 Rice 0.001391 30000 0.149 0.002 2013 493 Safflower 0.000610 2400 0.005 0.000 57377 14063 Sorghum 0.000305 640 0.001 0.000 430328 105473 Soybeans 0.001045 12000 0.045 0.001 6699 1642 Sugar beet 0.001873 400 0.003 0.000 112120 27480 Wheat 0.000525 24000 0.045 0.001 6667 1634 Table B10: Short Term and Intermediate Term Residential handler Risk for PCNB 124 Exposure Scenario ( Scenario #) Dermal Unit Exposure ( mg/ lb ai) 1 Inhalation Unit Exposure ( Ug/ lb ai) 2 Crop3 Application Rate4 Daily Area Treated5/

day Dermal Dose ( mg/ kg/ day) 6 Dermal MOE 7 Inhalation Dose ( mg/ kg/ day) 8 Inhalation MOE9 Applicator Applying Granulars for Hand application ( 1) 430 470 Residential Turf 32.67 lb ai / A 0.023 A 4.6 65 0.0050 200 Mixer/ Loader/ App Mixing/ Loading/ Applying Liquids for Low Pressure Handwand application ( 2) 100 30 Residential Turf 0.15 lb ai / gal 5 gal 1.1 280 0.00032 3100 Mixing/ Loading/ Applying Liquids for Backpack sprayer application ( 3) 5.1 30 Residential Turf 0.15 lb ai / gal 5 gal 0.055 5500 0.00032 3100 Mixing/ Loading/ Applying Liquids for Garden hose end sprayer( ORETF  RTU) application ( 4) 2.61 11 Residential Turf 32.67 lb ai / A 0.5 A 0.61 490 0.0026 390 Mixing/ Loading/ Applying Liquids for Garden hose end sprayer( ORETF  conventional) application ( 5) 10.95 17 Residential Turf 32.67 lb ai / A 0.5 A 2.6 120 0.0040 250 Loading/ Applying Granulars for Belly Grinder application ( 6) 110 62 Residential Turf 32.67 lb ai / A 0.5 A 26 12 0.014 69 Loading/ Applying Granulars for Push type spreader ( ORETF)

application ( 7) 0.67 0.88 Residential Turf 32.67 lb ai / A 0.5 A 0.16 1900 0.00021 4900 Loading/ Applying Granulars for Push type spreader ( ORETF)

application ( 8) 0.67 0.88 Residential Turf 43.56 lb ai / A 0.5 A 0.21 1400 0.00027 3700 1Baseline dermal unit exposures represent long pants, long sleeved shirts, shoes, and socks. Values are reported in the PHED Surrogate Exposure Guide dated August 1998 or are from data submitted by the Outdoor Residential Exposure Task Force dated May 2000.

2Baseline inhalation unit exposures represent no respirator. Values are reported in the PHED Surrogate Exposure Guide dated August 1998 or are from data submitted by the Outdoor Residential Exposure Task Force dated May 2000. 3Crops and use patterns are from PCNB labels and LUIS report 4Application rates are based on maximum values found in various sources including LUIS and various labels. In most scenarios, a range of maximum application rates is used to represent the range of rates for different crops/ sites/ uses. Most application rates upon which the analysis is based are presented as lb ai/ A. In some cases, the application rate is based on applying a solution at concentrations specified by the label ( i. e., presented as lb ai/ gallon).

5Amount treated is based on the area or gallons that can be reasonably applied in a single day for each exposure scenario of concern based on the application method and formulation/ packaging type. ( Standard EPA/ OPP/ HED values).

6Dermal dose ( mg/ kg/ day) = [ unit exposure ( mg/ lb ai) * Dermal absorption ( 100%) * Application rate ( lb ai/ acre or lb ai/ gallon) * Daily area treated ( acres or gallons)] / Body weight ( 70 kg).

7Dermal MOE = short term endpoint for dermal, such as oral NOAEL ( 300 mg/ kg/ day) / Daily Dermal Dose. Target Dermal MOE is 1000.

8Inhalation dose ( mg/ kg/ day) = [ unit exposure ( ug/ lb ai) * 0.001 mg/ g unit conversion * Inhalation absorption ( 100%) * Application rate ( lb ai/ acre or lb ai/ gallon) * Daily area treated ( acres or gallons)] / Body weight ( 70 kg).

9Inhalation MOE = oral NOAEL( 1 mg/ kg/ day) / Daily Inhalation Dose. Target Inhalation MOE is 1000. 125 APPENDIX C OCCUPATIONAL AND RESIDENTIAL POST APPLICATION TABLES C1  C4 126 Table C1 : PCNB Residential Postapplication Risk on Treated Turf ( day 0)

Activity Application Rate ( lb ai/ acre) TTR 5% of application ratea Transfer Coefficient ( cm2/ hr) b Dermal Dose ( mg/ kg/ day) c MOEd high contact lawn activities: adults 32.67 18.3 14,500 7.585 40 43.56 24.4 10.114 30 high contact lawn activities: toddler 32.67 18.3 5200 2.720 110 43.56 24.4 3.627 82 mowing turf: adults 32.67 18.3 500 0.262 1145 43.56 24.4 0.349 860 golf course reentry: adult 32.67 18.3 500 0.523 575 43.57 24.4 0.698 430 a TTR source: 5% of application rate, " Residential SOP Revised February 2001 " was used for determination of MOE's.

b Transfer coefficient from the Residential SOP's ( 02/ 01).

c Dermal dose = normalized TTR (

g/ cm2) x TC ( cm2/ hr) x conversion factor ( 1 mg/ 1,000

g) x exposure time ( 2 hrs/ day playing or mowing; 4 hrs golfing) / body weight ( 70 kg adult or 15 kg child 1 6 yrs). Short term MOEs were calculated using DAT 0 residue values d MOE = NOAEL ( 1mg/ kg/ day; based on a dermal study) / dermal dose Note: TTR = turf transferable residue 127 Table C2  Oral Exposure from Hand to Mouth Activity on PCNB Treated Turf Exposure Scenario Application Rate ( lb ai/ acre) Percent Active Ingredient Dislodgeable Surface Area ( cm2) Hand to Mouth ( events/ hr) Extraction by Saliva Exposure Time ( hours) Body Weight ( kg) Average Daily Dose ( mg/ kg/ day) Oral MOE Short term Exposures Hand to Mouth ( turf) 32.67 5% 20 20 50% 2 15 0.488 2 43.56 0.650 2 Intermediate term Exposures Hand to Mouth ( turf) 32.67 5% 20 9.5 50% 2 15 0.232 4 43.56 0.309 3 Oral Dose ( mg/ kg/ day) = AR ( lb ai) x CF x F x SA ( cm2) x EXT x FQ( events/ hr) x ET( hrs/ day) x ( 0.001mg/

g)

BW ( kg)

Where:

Dose = oral dose on day of application ( mg/ kg/ day)

AR = application rate ( lb ai/ A)

CF = conversion factor ( 11.2) to convert lb ai/ A to

g/ cm2 ( 1 lb ai/ A x 4.54E 8

g/ lb x 2.47E 8 A/ cm2 = 11.2

g/ cm2)

F = fraction of residue dislodgeable from wet hands ( unitless)

SA = surface area of 1 to 3 fingers ( cm2)

EXT = extraction rate by saliva ( unitless)

FQ = frequency of hand to mouth events ( events/ hour)

ET = exposure duration ( hours/ day)

BW = body weight ( kg)

Assumptions:

SA  The surface area of 1 to 3 finger is 20 cm2 FQ  The frequency of hand to mouth events is 20 events per hour for short term and 9.5 events per hour for intermediate term F  The fraction of residue dislodgeable from wet hands is 5%

EXT  The extraction rate by saliva is 50%.

ET  The time spent outdoors is 2 hours/ day 128 Table C3  Oral Exposure from Mouthing PCNBTreated Turf Exposure Scenario Application Rate lb ai/ acre Percent Active Ingredient Dislodgeable Surface Area ( cm2) Body Weight ( kg) Average Daily Dose ( mg/ kg/ day) Oral MOE ( UF= 1000)

Short term Exposures Object ( turf) to Mouth 32.67 20% 25 15 0.122 8 43.56 0.163 6 Intermediate term Exposures Object ( turf) to Mouth 32.67 20% 25 15 0.122 8 43.56 0.163 6 PDR = ( AR * F DR * CF * IgR * ( 1 mg/ 1000

g)

where:

PDR = potential dose rate ( mg/ day);

AR = application rate F DR = fraction of residue dislodgeable from contaminated object ( 20%)

CF = conversion factor to convert lb ai/ A to

g/ cm2 ( 11.2)

IgR = ingestion rate for mouthing of grass per day ( 25 cm2/ day) 129 Table C4  Oral Exposure from Incidental Soil Ingestion Exposure Scenario Application Rate ( lb ai/ acre) % of Application Rate in Uppermost 1 cm of Soil ( fraction/ cm) Ingestion Rate ( IgR)

mg/ day Body Weight ( kg) Average Daily Dose ( mg/ kg/ day) Oral MOE ( UF= 1000)

Short term Exposures Incidental Soil Ingestion 32.67 100% 100 15 0.0016 612 43.56 0.0022 460 Intermediate term Exposures Incidental Soil Ingestion 32.67 100% 100 15 0.0016 612 43.56 0.0022 460 Oral Dose = AR( lb ai/ A) x F( 1.0/ cm) x IgR( mg/ day) x ( 4.54E 8

g/ lb) x ( 2.47E 8 A/ cm2) x ( 0.67 cm3/ g) x ( 1E 6 g/

g)

BW ( kg)

Where:

Dose = oral dose on day of application ( mg/ kg/ day)

AR = application rate ( lb ai/ A)

F = fraction or residue retained on uppermost 1 cm of soil IgR = ingestion rate of soil ( mg/ day)

CF1 = weight unit conversion factor to convert the lbs ai in the application rate to

g for the soil residue value ( 4.54 x 108

g/ lb)

CF2 = area unit conversion factor to convert the surface area units ( ft2) in the application rate to cm2 for the SR value ( 2.47 x 10 8 acre/ cm2)

CF3 = volume to weight unit conversion factor to convert the volume units ( cm3) to weight units for the soil residue value ( 0.67 cm3/ g soil)

CF4 = weight unit conversion factor to convert the

g of residues on the soil to grams to provide units of mg/ day ( 1E 6 g/

g)

BW = body weight ( kg)

Assumptions:

F  The fraction or residue retained on uppermost 1 cm of soil is 100 percent based on soil incorporation into top 1 cm of soil after application ( 1.0/ cm)

IgR  The ingestion rate of soil is 100 mg/ day 130 APPENDIX D SOURCE OF DATA Tables D1 D3 131 Table D1. Occupational Exposure Scenario Descriptions, Assumptions and Data Sources for the Use of PCNB Exposure Scenario Data Source Standard Assumptions Comments Occupational Mixer/ Loader Exposure Mixing/ Loading Wettable Powder Formulations PHED V1.1 200, 80 and 40 acres by groundboom; 10 acres for soil directed drench application to ornamentals; 100 gallons for dip treatment Baseline: " Best Available" grades: Dermal ( 22 35 replicates), ABC grade. Hand ( 7 replicates), ABC grade. Inhalation ( 44 replicates), ABC grade. Low confidence in dermal/ hand data due to the low number of hand replicates; medium confidence in inhalation data.

PPE: The same dermal and inhalation data are used as for the baseline coupled, when needed, with a 50% protection factor to account for an additional layer of clothing and a 80% protection factor to account for the use of a dust/ mist respirator. Gloved hand ( 24 replicates) are based on ABC grade data. Medium confidence in dermal/ gloved hands data.

Engineering Controls ( water soluble packets): Hand ( 5 replicates) and dermal ( 6 15 replicates) exposure values are based on AB grade data. Inhalation ( 15 replicates) exposure value is based on all grade data. Low confidence in dermal/ hand and inhalation data.

Mixing/ Loading Dry Flowable Formulations PHED V1.1 200, 80 and 40 acres by groundboom; 10 acres for soil directed drench application to ornamentals; 100 gallons for dip treatment Baseline: Dermal ( 16 26 replicates); hand ( 7 replicates); and inhalation ( 23 replicates) exposure values are all based on AB grade data. Low confidence in hand/ dermal data due to the low number of hand replicates. High confidence inhalation data.

PPE: The same dermal and inhalation data are used as for the baseline coupled, when needed, with a 50% protection factor to account for an additional layer of clothing and a 80% protection factor to account for the use of a dust/ mist respirator. Hand ( 21 replicates) exposure values are based on AB grade data. High confidence in the dermal/ gloved hands data.

Engineering Controls ( water soluble packets): Hand ( 5 replicates) and dermal ( 6 15 replicates) exposure values are based on AB grade data. Inhalation ( 15 replicates) exposure value is based on all grade data. Low confidence in dermal/ hand and inhalation data.

Mixing/ Loading Liquid Formulations PHED V1.1 1,200, 350, 80 acres for aerial/ chemigation and 5 acres soil drench chemigation; 200, 80 and 40 acres and 10 acres for soil directed drench application to ornamentals all by groundboom; and 100 gallons for dip treatment Baseline: Dermal ( 172 122 replicates); hand ( 53 replicates); and inhalation ( 85 replicates) exposure values are all based on AB grade data. High confidence in dermal/ hands and inhalation data.

PPE: The same dermal and inhalation data are used as for the baseline coupled, when needed, with a 50% protection factor to account for an additional layer of clothing and a 80% protection factor to account for the use of a dust/ mist respirator.

Glovedhand ( 59 replicates) exposure value is based on is based on AB grade data. High confidence in the unit dermal/ gloved hand exposure value.

Engineering Controls: ( closed mixing systems): Dermal ( 31 replicates), hand ( 31 replicates), and inhalation ( 27 replicates)

exposure values are based on AB grade data. High confidence in the dermal/ gloved hand and inhalation unit exposure values.

Empirical data include the use of chemical resistant gloves.

Loading Granular Formulations PHED V1.1 80 acres for sod farms and 40 acres for golf course turf Baseline: Hand ( 10 replicates) exposure values are based on all grade data, dermal ( 33 78) exposure values are based on ABC grade data , and inhalation ( 58 replicates) exposure values are based on AB grade data. Low confidence in dermal/ hand data and high confidence in inhalation data.

PPE: The same inhalation data are used as for the baseline coupled with an 80% protection factor to account for the use of a dust/ mist respirator. Hand ( 45 replicates) and double layer ( 12 59 replicates) exposure values are based on ABC grade data.

Medium confidence in single layer/ gloved hand data and low confidence in double layer/ gloved hand data.

Engineering Controls ( Lock ` n Load): The same data are used as for baseline coupled with a 98% protection factor to account for Lock ` n Load.

Applicator Exposure Aerial Spray Application PHED V1.1 350 acres Baseline and PPE: insufficient data.

Engineering controls ( enclosed cockpit): Dermal ( 24 to 48 replicates) and inhalation ( 23 replicates) exposure values are based on ABC grade data. Hand ( 34 replicates) exposure value is based on AB grade data. Medium confidence in the dermal/ hands and inhalation unit exposure values. Table D1. Occupational Exposure Scenario Descriptions, Assumptions and Data Sources for the Use of PCNB Exposure Scenario Data Source Standard Assumptions Comments 132 Groundboom Application PHED V1.1 200, 80, 40 and 10 acres Baseline: Dermal ( 23 to 42 replicates), hand ( 29 replicates), and inhalation ( 22 replicates) exposure values are based on AB grade data. High confidence in the unit exposure values.

PPE: The same dermal and inhalation data are used as for the baseline coupled, if needed, with a 50% protection factor to account for an additional layer of clothing and an 80% protection factor to account for the use of a dust/ mist respirator. Gloved hand ( 21 replicates) exposure value is based on ABC grade data. Medium confidence in the dermal/ gloved hand unit exposure value.

Engineering Controls ( enclosed cab): Dermal ( 20 to 31 replicates) and hand ( 16 replicates) exposure values are based on ABC grade data. Inhalation ( 16 replicates) exposure value is based on AB grade data. Medium confidence in dermal/ hand unit exposure value, and high confidence in the inhalation unit exposure value.

Applying Granulars with a Tractor Drawn Spreader PHED V1.1 40 acres Baseline: Dermal ( 1 5 replicates); hand ( 5 replicates); and inhalation ( 5 replicates) exposure values are all based on AB grade data. Low confidence in the unit exposure values.

PPE: The same dermal and inhalation data are used as for the baseline coupled, when needed, with a 50% protection factor to account for an additional layer of clothing and an 80% protection factor to account for the use of a dust/ mist respirator.

Glovedhand ( 0 replicates) exposure value is low confidence due to lack of data.

Engineering Controls: ( enclosed cab): Dermal ( 2 30 replicates), gloved hand ( 24 replicates), and inhalation ( 37 replicates)

exposure values are based on AB grade data. High confidence in the dermal/ gloved hand unit exposure value. Low confidence in inhalation unit exposure value.

Applying a Dip Treatment No data 100 gallons No data Mixer/ Loader/ Applicator Exposure Liquids Using a High Pressure Handwand PHED V1.1 1,000 gallons Baseline: Inhalation ( 13 replicates) exposure values are based on A grade data. Low confidence in inhalation data.

PPE: The same inhalation data are used as for the baseline coupled, when needed, with an 80% protection factor to account for the use of a dust/ mist respirator. Dermal ( 7 to 13 replicates) are based on AB grade data and gloved hand ( 7 to 13 replicates) is based on ABC grade data. Low confidence in the unit exposure value for dermal/ gloved hands. Dermal data is coupled, when needed, with a 50% protection factor to account for an additional layer of clothing.

Engineering Controls: Not considered plausible for this assessment.

Low Pressure Handwand  Liquid Formulation PHED V1.1 0.5 acres or 40 gallons Baseline: Dermal ( 9 to 80 replicates) and inhalation ( 80 replicates) exposure values are based on ABC grade data. Hand ( 70 replicates) exposure value is based on all grade data. Low confidence in the dermal/ hands unit exposure values. Medium confidence in the inhalation unit exposure value.

PPE: The same dermal and inhalation data are used as for baseline coupled, if needed, with a 50% protection factor to account for the use of an additional layer of clothing and an 80% protection factor to account for the use of a dust/ mist respirator. Gloved hand ( 10 replicates) exposure value is based on ABC grade data. Low confidence in dermal/ gloved hand data.

Engineering Controls: Not available for this assessment.

Dry Flowables with a Low Pressure Handwand No data 0.5 acres or 40 gallons No data Backpack Sprayer  Liquid Formulation PHED V1.1 5 acres Baseline: Inhalation ( 11 replicates) exposure value is based on A grade data. Low confidence in the unit exposure value. No protection factors were needed to define the unit exposure value.

PPE: Hand ( 11 replicates) exposure value data is based on C grade data. Dermal ( 9 11 replicates) exposure value is based on AB grade data. Low confidence in gloved hand/ dermal data. Dermal data is coupled, when needed, with a 50% protection factor to account for an additional layer of clothing. The same inhalation data are used as for the baseline coupled with an 80%

protection factor to account for the use of a dust/ mist respirator.

Engineering Controls: Not available for this assessment.

Mixing/ Loading/ Applying with a Lawn Handgun  Liquid Formulations ( PCO) ORETF Study OMA002 5 acres Baseline: Inhalation ( 15 replicates) data were used to establish exposure values.

PPE: The same inhalation data are used as for baseline coupled, if needed, with an 80% protection factor to account for the use of a dust/ mist respirator. Dermal ( 15 replicates) and gloved hand ( 60 replicates) data were used to establish an exposure value. The dermal data are coupled, if needed, with a 50% protection factor to account for the use of an additional layer of clothing.

Engineering Controls: Not available for this scenario. Table D1. Occupational Exposure Scenario Descriptions, Assumptions and Data Sources for the Use of PCNB Exposure Scenario Data Source Standard Assumptions Comments 133 Mixing/ Loading/ Applying with a Lawn Handgun  Dry Flowable Formulations ( PCO) ORETF Study OMA002 5 acres ( broadcast); 0.05 acres ( spot or drench) Baseline: Inhalation ( 15 replicates) data were used to establish exposure values.

PPE: The same inhalation data are used as for baseline coupled, if needed, with an 80% protection factor to account for the use of a dust/ mist respirator. Dermal ( 15 replicates) and gloved hand ( 60 replicates) data were used to establish an exposure value. The dermal data are coupled, if needed, with a 50% protection factor to account for the use of an additional layer of clothing.

Engineering Controls: Not available for this scenario.

Mixing/ Loading/ Applying with a Lawn Handgun  Wettable Powder Formulations ( PCO) ORETF Study OMA002 5 acres ( broadcast); 0.05 acres ( spot or drench) Baseline: Inhalation ( 15 replicates) data were used to establish exposure values.

PPE: The same inhalation data are used as for baseline coupled, if needed, with an 80% protection factor to account for the use of a dust/ mist respirator. Dermal ( 15 replicates) and gloved hand ( 60 replicates) data were used to establish an exposure value. The dermal data are coupled, if needed, with a 50% protection factor to account for the use of an additional layer of clothing.

Engineering Controls: Not available for this scenario.

Mixing/ Loading/ Applying a Dip Treatment No data 100 gallons No data Flagger Exposure Flagging Aerial Sprays PHED V1.1 350 Baseline: Dermal ( 18 to 28 replicates); hand ( 30 replicates); and inhalation ( 28 replicates) exposure values are based on AB grade data. High confidence in the unit exposure values.

PPE: The same dermal and inhalation data are used as for the baseline coupled, if needed, with a 50% protection factor to account for the use of an additional layer of clothing and an 80% protection factor to account for the use of a dust/ mist respirator. Hand ( 6 replicates) exposure value is based on AB grade data ( not used). Low confidence in the gloved hand unit exposure value.

Engineering Controls ( enclosed cab): Data is based on groundboom enclosed cab.

a Standard assumptions are based on the activities of a typical individual over a daily 8 hour interval. Occupational scenarios reflect what individuals could accomplish in an 8 hour workday.

b Data quality assessments are based on the PHED grading criteria and the guidance provided in the Dec 1997 surrogate exposure table. Acceptable grades are matrices with grade A and/ or B data. The PHED surrogate exposure table upon which this assessment is based was developed using the best data available in the system that are appropriate to the exposure scenario. Data confidence descriptors are assigned as follows:

High = grades A and B and 15 or more replicates;

Medium = grades A, B, and C and 15 or more replicates; and Low = grades A, B, C, D, and E or any combination of grades with less than 15 replicates Table D2. Residential Exposure Scenario Descriptions, Assumptions, and Data Sources for the Use of PCNB Exposure Scenario Data Source Standard Assumptionsa Commentsb Applying RTU Formulation with a Hose End Sprayer ORETF Study OMA004 MRID 449722 01 0.5 acres  ornamentals] Baseline: Dermal, hand and inhalation ( 30 replicates each) data used to establish exposure values. Average laboratory and field recoveries were within guideline parameters; data of acceptable quality ( AB grade).

Mixing/ Loading/ Applying with a Low Pressure Handwand  Liquid Formulations SOPs for Residential Exposure Assessments ( 12/ 97) 5 gallons ornamentals; or turf spot treatment to 0.023 acres ( 1,000 ft2) Baseline: Dermal ( 9 80 replicates) and inhalation ( 80 replicates) exposure values are based on ABC grade data,

and hand ( 70 replicates) exposure value is based on All grade data. Low confidence in hand/ dermal data. Medium confidence in inhalation data. Table D2. Residential Exposure Scenario Descriptions, Assumptions, and Data Sources for the Use of PCNB Exposure Scenario Data Source Standard Assumptionsa Commentsb 134 Mixing/ Loading/ Applying with a Backpack Sprayer SOPs for Residential Exposure Assessments ( 12/ 97) 5 gallons ornamentals; or turf spot treatment to 0.023 acres ( 1,000 ft2) Baseline: Dermal ( 9 11 replicates) exposure value is based on AB grade data, hand ( 11 replicates) exposure value is based on C grade data, and inhalation ( 11 replicates) exposure value is based on A grade data. Low confidence in hands/ dermal and inhalation data. A 90% protection factor was used to " back calculate" the " no glove" hand scenario from gloved hand data.

Loading/ Applying with a Push type Granular Spreader ORETF Study  OMA003 MRID 449722 01 0.5 acres Baseline: Hand, dermal, and inhalation ( 30 replicates each) data used to establish exposure values. Average laboratory and field recoveries were within guideline parameters; data of acceptable quality ( AB grade).

a Standard Assumptions based on HED estimates.

b " Best Available" grades are defined by HED SOP for meeting Subdivision U Guidelines. Best available grades are assigned as follows: matrices with grades A and B data and a minimum of 15 replicates; if not available, then grades A, B and C data and a minimum of 15 replicates; if not available, then all data regardless of the quality and number of replicates. Data confidence are assigned as follows:

High = grades A and B and 15 or more replicates per body part Medium = grades A, B, and C and 15 or more replicates per body part Low = grades A, B, C, D and E or any combination of grades with less than 15 replicates Table D3  Sources of Exposure Data Used to Assess Occupational Handler Risks of Seed Treatment Exposure Scenario ( Number) Data Source Comments Primary Mixer/ Loader Descriptors Table D3  Sources of Exposure Data Used to Assess Occupational Handler Risks of Seed Treatment Exposure Scenario ( Number) Data Source Comments 135 Loader Applicator ( 1) Seed Treatment SOP Taken from 3 studies ( MRID 430800 49, 422519 02 and 447315 01). There were a total of 27 replicates.

20 replicates are from MRID 430800 49. Each replicate was a minimum of 3.5 hours. This study involved the treating of soybean seed with Apron using Gustafson XXXX Treaters at two facilities in the midwest. The chemical was manually added to the mix tanks from 1 GA jugs ( 15 replicates) or 3 lb water soluble bags ( 5 replicates). 12500 lbs of seed were treated per hour. Dermal exposure was measured using whole body dosimeters, handwashes and face wipes.

Inhalation exposures were measured with glass fiber filters and XAD tubes. Field recovery was grade A for the handwashes and air filters and grade AB for the face wipe and whole body dosimeters.

6 replicates are from MRID 422519 02. The average duration of each replicate was 7.4 hours. This study involved the treating of canola with Oftanol technical at one facility in Canada with a 150 kg batch blending machine. The chemical was pumped to the mixing tank from a 55 GA drum. Each batch took five minutes.

Dermal exposure was measured using patches and handwash. Inhalation exposures were measured using quartz microfiber filters. Field fortification recovery was grade A for all media.

1 replicate is from MRID 447315 01. This study involved the treating of canola with Vivavax RS flowable at one facility in Canada with a Gustafson Accu treat film coater. The chemical was transferred to the mixing tank from a tote. Dermal exposure was measured using patches, handwashes, glove washes and face washes. Inhalation exposures were measured with glass fiber filters and XAD tubes. Field fortification recovery was grade AB for dermal media. The field recovery for the inhalation media was 220 percent. The laboratory recovery was grade A for both the dermal and inhalation all media.

Bagger ( 2) Seed Treatment SOP Taken from 3 studies ( MRID 430800 49, 422519 02 and 447315 01). There were a total of 24 replicates.

20 replicates are from MRID 430800 49. The same bagging method was used at both facilities. The bagger clamped an empty bag to the bagging machine and the treated seed dropped into the bag. The seed flow stopped automatically and the filled bag dropped onto a conveyor belt.

3 replicates are from MRID 422519 02. The treated seed was transferred to a bagging hopper after passing through a compactor and shaker screen. The bagger attached a bag to the hopper and filled the bag. The bagger then removed the bag, carried it to a sewing station and sewed it with a hand held sewer.

1 replicate is from MRID 447315 01. This replicate was sampled during bag filling. Methods were the same as for the loader/ applicator with the exception that a full body dosimeter was used instead of patches.

Sewer ( 3) Seed Treatment SOP Taken from 2 studies ( MRID 430800 49 and 447315 01). There were a total of 21 replicates 20 replicates are from MRID 430800 49. The same sewing method was used at both facilities. The sewer grabbed the bag, attached ID tags and guided it through the sewing and stamping machines.

1 replicate is from MRID 447315 01. This replicate was sampled during bag filling. Methods were the same as for the loader/ applicator with the exception that a full body dosimeter was used instead of patches. Table D3  Sources of Exposure Data Used to Assess Occupational Handler Risks of Seed Treatment Exposure Scenario ( Number) Data Source Comments 136 Multiple Activities ( 4) Seed Treatment SOP Taken from MRIDs 454427 01, 422519 02 , 449045 26 and 447315 01. There were a total of 66 replicates.

45 replicates are from MRID 454427 01. This study involved the treating of rice at three sites in the south with ICON 6.2 FS aqueous flowable using Gustafson PSD50 D3 treaters. A total of 45 workers were monitored with an average replicate time of 6.3 hours. These worker performed mixing/ loading, bagging and clean up. The product was added to the mix tanks from 30 gallon containers. The rice seed was dumped through the seed treater and stored in a bin until bagged.

Dermal exposure was measured with whole body dosimeters, handwash and face/ neck wipes. Inhalation exposures were measured with 37 mm filters and adsorption tubes. Dermal field recoveries were grade AB. Inhalation recoveries were grade A.

3 replicates are from MRID 422519 02. The shift foreman supervised the process and assisted with various tasks as necessary.

12 Replicates are from MRID 449045 26. This study involved the treating of wheat, barley, oats and peas at two sites in Canada using Vitaflow 280 packaged in 1000 liter totes or Vivavax Single packaged in a 200 liter drums. The replicates were one half day in length and involved a total of 5 workers. Workers loaded the formulation into the seed treater, operated the seed treater, bagged treated seed, transferred treated seed to storage bins or trucks, cleaned up the seed treatment area and cleaned up treated seed storage bins or the bagging area. Dermal exposure was measured with whole body dosimeters and cotton gloves. Inhalation exposures were measured with millipore filters. The dermal field fortification samples had highly variable recoveries possibly due to contamination.

6 replicates are from MRID 447315 01. 2 replicates stacked bags, 3 replicates did all tasks and 1 replicate did all tasks except loading.

Planter Box Seed Treatment ( 5) Seed Treatment SOP Taken from one study ( MRID 470316 11). There were a total of 12 replicates at one site with four workers and the replicates ranged from 1.5 to 2 hours in duration. Workers loaded seed drill hoppers with wheat seed and a lindane/ maned dust formulation. Dermal exposures were measured with patches and handwash. Inhalation exposures were measured with glass fiber filters. The field recovery was grade A for all media.

Seed Planter ( 6) Seed Treatment SOP Taken from MRIDs 456545 03 and 422519 01. There were a total of 26 replicates.

13 replicates are from MRID 456545 03 which involved the loading and drilling of seed treated with Baytan. The replicates were all located at different sites in the UK. The seed was loaded into the drill hoppers from 0.5 or 1 ton supersacks or 50 kg bags. The amount of seed handled ranged from 1100 to 12,100 lbs and the amount of ai handled ranged from 0.35 to 4.72 lbs. The loading time ranged from 19 to 83 minutes while the planting time ranged from 155 to 487 minutes.

The seed planting rate per acre was not given in the review. The same worker performed both the loading and planting. Dermal exposure was measured with inner and outer whole body dosimeters which included a cap, a jacket and trousers over a long sleeve T shirt and long johns and two sets of cotton gloves. The gloves were changed at the end of loading. Inhalation exposures were measured with 37 mm glass fiber filters and the filters were changed after loading. The dermal results were adjusted by a clothing protection factor to account for the fact that 5% of the outer residues was found on the inner dosimeters. Dermal and inhalation field recoveries were grade A.

13 replicates are from MRID 422519 01 which involved the loading and drilling of canola seed treated with Oftanol which forms a hard shell coating. The replicates were located at one site in Manitoba using four different planting rigs. Four workers participated and the replicates averaged 3.2 hours in duration. The seed was loaded into the drill hoppers from 25 kg bags. The amount of seed handled per replicate averaged 360 pounds and the amount of ai handled averaged 4.33 lbs. The seed was planted at a rate of 6 to 8 pounds per acre. The same worker performed both the loading and planting. Dermal exposure was measured with patches located both inside and outside the worker's coverall. Hand exposures were measured by handrinse. Inhalation exposures were measured with 37 mm quartz microfiber filters. Dermal and inhalation field recoveries were grade A.

$ All handler exposure assessments in this document are based on the " Best Available" data as defined by the PHED SOP for meeting Subdivision U Guidelines ( i. e., completing exposure assessments). Best available grades are assigned to data as follows: matrices with A and B grade data ( i. e., Acceptable Grade Data) and a minimum of 15 replicates; if not available, then grades A, B and C data and a minimum of 15 replicates; if not available,

then all data regardless of the quality ( i. e., All Grade Data) and number of replicates. High quality data with a protection factor take precedence over low quality data with no protection factor.

$ The generic data confidence categories are assigned as follows:

High = grades A and B and 15 or more replicates per body part Medium = grades A, B, and C and 15 or more replicates per body part Low = grades A, B, C, D and E or any combination of grades with less than 15 replicates. 137

The data grades are as follows:

A = Field recovery is 70 to 120 percent. Lab recovery is 90 to 110 percent with a CV of < 15 percent.

B = Field recovery is 50 to 120 percent. Lab recovery is 80 to 110 percent with a CV of < 25 percent.

C = Field recovery is 30 to 120 percent. Lab recovery is 70 to 120 percent with a CV of < 33 percent.

D = No field recovery data is available. Lab recovery is 60 to 120 percent with a CV of < 33 percent.