Initial to indicate certification as to information on this page (full text of certification is on page one). Date INSTRUCTIONS: Please type or print in ink. Please read carefully the attached instructions and supply the information requested on this form. Use additional sheet(s) if necessary. 2. Case # and Name 3. Date and Type of DCI and Number

4. EPA Product Registration 5. I wish to cancel this product registration voluntarily 6. Generic Data 7. Product Specific Data 6a. I am claiming a Generic Data Exemption because I obtain the active ingredient from the source EPA registration number listed below. 6b. I agree to satisfy Generic Data Requirements as indicated on the attached form entitled "Requirements Status and Registrant's Response." 7a. My product is an MUP and I agree to satisfy the MUP requirement on the attached form entitled "Requirements Status and Registrant's Response." 7b. My product is an EUP and I agree to satisfy the EUP requirement on the attached form entitled "Requirements Status and Registrant's Response." OMB Approval 2070-0174

1. Company Name and Address 0109 - Terbufos Chemical # and Name: 105001 Terbufos 02-Feb-2010 GENERIC ID # GDCI-105001-903 

### United States Environmental Protection Agency

Washington, D.C. 20460 DATA CALL-IN RESPONSE 1 Page of 1

8. Certification: I certify that the statements made on this form and all attachments are true, accurate, and complete. I acknowledge that any knowingly false or misleading statement may be punishable by fine, imprisonment or both under applicable law. Signature and Title of Company's Authorized Representative ______________________________________________________ 10. Name of Company N/A N/A

9. Date

11. Phone NumberInitial to indicate certification as to information on this page (full text of certification is on page one) 13. Phone Number 10. Certification: I certify that the statements made on this form and all attachments are true, accurate, and complete. I acknowledge that any knowingly false or misleading statement may be punishable by fine, imprisonment or both under applicable law.
12. Name of Company 11. Date OMB Approval 2070-0174 

### United States Environmental Protection Agency

Washington, D.C. 20460 REQUIREMENTS STATUS AND REGISTRANT'S RESPONSE INSTRUCTIONS: Please type or print in ink. Please read carefully the attached instructions and supply the information requested on this form. Use additional sheet(s) if necessary.

4. Guideline Requirement Number 5. Study Title Progress Reports



### 2 3 1 6. Use

Pattern 7. Test Substance 8. Time Frame (Months) 9. Registrant

Response P R O T O C O L 1. Company Name and Address 2. Case # and Name 3. Date and Type of DCI and Number

Signature and Title of Company's Authorized Representative _________________________________________________________________

Environmental Fate Data Requirements (Conventional Chemical)

Nontarget Plant Protection Data Requirements (Conventional Chemical)

Product Chemistry Data Requirements (Conventional Chemical) 835.6100 835.6200

850.4100 850.4400 850.5400

830.7050 Terrestrial field dissipation

Aquatic field dissipation

Terrestrial Plant Toxicity (Seedling Emergence) Aquatic plant toxicity test using Lemna spp. Tiers I and II Algal toxicity, Tiers 1 and II

UV/Visible absorption 0109 - Terbufos Chemical # and Name: 105001 Terbufos 02-Feb-2010 GENERIC ID # GDCI-105001-903

A,B A,B

A,B A,B A,B

A,B TEP TEP

TEP EP; PAI; TGAI EP; PAI; TGAI

EP; PAI; TGAI 24 24

24 12 12

8 1 of Page

(2) (3)

(1, 5, 6) (4, 5, 6) (4, 5, 6) N

N

N N N

N 2Date OMB Approval 2070-0174 

### United States Environmental Protection Agency

Washington, D.C. 20460 REQUIREMENTS STATUS AND REGISTRANT'S RESPONSE INSTRUCTIONS: Please type or print in ink. Please read carefully the attached instructions and supply the information requested on this form. Use additional sheet(s) if necessary.

4. Guideline Requirement Number 5. Study Title Progress Reports



### 2 3 1 6. Use

Pattern 7. Test Substance 8. Time Frame (Months) 9. Registrant

Response P R O T O C O L 1. Company Name and Address 2. Case # and Name 3. Date and Type of DCI and Number

Toxicology Data Requirements (Conventional Chemical) 870.7800 Immunotoxicity 0109 - Terbufos Chemical # and Name: 105001 Terbufos 02-Feb-2010 GENERIC ID # GDCI-105001-903

A,B TGAI 12 2 of Page

N 2

### United States Environmental Protection Agency Washington, D.C. 20460 FOOTNOTES AND KEY DEFINITIONS FOR GUIDELINE REQUIREMENTS 0109 - Terbufos GDCI-105001-903

1 2
3

4 5 6 Key: Residue of Concern = Residue of Concern; TEP = Typical End Use Product [TEP]; TGAI = Technical Grade Active Ingredient [TGAI]; TGAI/PAIRA = Technical Grade of the Active Ingredient or Pure Active Ingredient, Radio Labelled; TGAI, TEP = Technical Grade of the Active Ingredient or Technical End-Use Product; TGAI/PAI = Technical Grade Active Ingredient, Pure Active Ingredient

The title of this study on the DCI mailed out 2/2/10 reads "Terrestrial plant toxicity, Tier 1 (Seedling Emergence)". The Agency is not requiring the entire terrestrial field study as defined in Office of Prevention, Pesticides and Toxic Substances (OPPTS) harmonized quidelines, "Terrestrial Field Dissipation" 835.6100. The particular data the Agency requires is for independent laboratory validations for environmental chemistry analytical methods. These data are necessary to confirm the levels of detection and quantitation reported in registrant-prepared validations for residues in soil and to evaluate the submitted environmental fate and ecological effects data for enforcement monitoirng. The Agency is not requiring the entire aquatic field study as defined in Office of Prevention, Pesticides, and Toxic Substances (OPPTS) harmonized guidelines "Aquatic Field Dissipation" 835.6200. The particular data the Agency requires is for independant laboratory validations for environmental chemistry analytical methods. These data are necessary to confirm the levels of detection and quantitation reported in registrant-prepared validations for residues in water and to evaluate the submitted environmental fate and ecological effects data for enforcement monitoring. Required if the tested aquatic species exhibits a 50 percent or greater detrimental effect in the Tier I study. When Tier II testing is required, the test species should be the species that showed detrimental effects in the Tier I testing. Not required for contained pesticide treatments such as bait boxes and pheromone traps unless adverse effects reports are received by the Agency. Not required for aquatic residential uses. Case # and Name: DCI Number: 1 Page: of 1

Footnotes: The following footnotes are referenced in column two (5. Study Title) of the Requirements Status and Registrant's Response form. These footnotes apply in addition to any test notes included in 40 CFR Part 158 with respect to the particular data requirement. Use Categories Key: A - Terrestrial food crop B - Terrestrial feed crop

### United States Environmental Protection Agency Washington, D.C. 20460 LIST OF ALL REGISTRANTS SENT THIS DATA CALL-IN NOTICE 0109 - Terbufos Case # and Name: 1 Page: of 1

5481 AMVAC CHEMICAL CORPORATION Co. Nr. Company Name Agent For Company 4695 MACARTHUR COURT, SUITE 1200 Address City ZIP NEWPORT BEACH 926601706 OMB Approval 2070-0174

State CA DCI Number: GDCI-105001-903

# LINKS TO FORMS: The pesticide registration forms that are listed below can be found at: http://www.epa.gov/opprd001/forms/ Link to C onfidential Statement of Formula and Instructions (Form # 8570 -4 

# ) http://www.epa.gov/opprd001/forms/8570 - 4.pdf C ertification of Attempt to Enter Into an Agreement With Registrants for Development of Data (Form # 8570 - 32 

# ) http://www.epa.gov/opprd001/forms/8570 - 32.pdf
C ertification With Respect to Citation of Data (Form # 8570 - 34 

# ) http://www.epa.gov/opprd001/forms/8570 - 34.pdf