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(916) 445-4300


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  California Notice 97-4
  POST UNTIL December 1, 1997

NOTICE OF INITIATION OF REEVALUATION
OF PESTICIDE PRODUCTS

The Director of the Department of Pesticide Regulation (DPR), pursuant to Articles 8 and 12 (Title 3) of the California Code of Regulations, files this notice concerning the reevaluation of pesticide products with the Secretary of the Resources Agency for posting. This notice must remain posted for a period of 30 days for public inspection.

REEVALUATION

DPR commenced reevaluation of pesticide products containing metam sodium on October 15, 1991. The following is a list of currently registered pesticide products that contain metam sodium as an active ingredient.

Registrant

Brand Name U.S. EPA Reg. No.
Airrigation Foam-Coat Vaporooter 9993-2-ZA
  Sanafoam Vaporooter II 9993-3-ZA
Amvac Chemical Company Metam Sodium 5481-350-ZA
  Metam Sodium Manufacturer's Concentrate 5481-416-AA
  Amvac Metam 5481-420-AA
  Metam 426 5481-423-AA
  Vapam 5481-466-AA
  Vapam Hi Soil Fumigant
5481-468-AA
  Vapam Manufacturing Concentrate
5481-469-AA
  Vapam
10182-150-AA-5481
  Vapam Hi Soil Fumigant
10182-392-AA-5481
  Vapam Manufacturing Concentrate
10182-399-AA-5481
Buckman Laboratories, Inc. Busan 1020 1448-85-AA
  Busan 1016 1448-93-AA
  Busan 1236 1448-361-AA
  Busan 1236W 1448-361-ZA
Florida Petrochemicals, Inc. Rout 64898-4-AA
  Sewerout 64898-4-ZA
Zeneca, Inc. Vapam Soil Fumigant Solution for All Crops
10182-150-ZA
  Pole-Fume
10182-196-AA
  Vapam Hi Soil Fumigant
10182-392-AA
  Vapam Manufacturing Concentrate
10182-399-AA
ISK Biotech Corporation ISK-Fume
1022-562-AA-50534
J.R. Simplot Company Metam 7001-284-ZA
Nalco Chemical Company Nalco 8964
1448-93-AA-1706
Oregon-California Chemicals Or-Cal Sectagon II 52251-1-AA
  Pole Life
52251-40-AA
  Sectagon 42
52251-43-AA
Osmose Wood Preserving, Inc.
Woodfume
3008-33-AA
  Woodfume Plus
3008-67-AA
Platte Chemical Company Clean Crop Metam
10182-150-AA-34704
  Clean Crop Metam Sodium
5481-350-AA-34704
  Nemasol 426
5481-423-AA-34704
UCB Chemicals Corporation UCB Metam 32.7%
(Soil Fumigant)
45728-15-AA
  UCB Metam 42%
(Soil Fumigant)
45728-16-AA
  Metam CLR 42% 45728-16-ZA
Wilbur-Ellis Company Soil Prep IV
52251-43-AA-2935
  Soil-Prep
1448-85-AA-2935
  Soil Prep 42
1448-361-AA-2935

BASIS OF REEVALUATION

DPR initiated the reevaluation based upon its review of acute toxicity data on file, at the time, for products containing metam sodium. The data indicated that products containing 32.7% to 33% metam sodium were the following toxicity categories by the various routes of exposure: Category III acute oral toxicity; Category II acute dermal toxicity; Category IV acute inhalation toxicity; Category III/IV for eye irritation; and Category I for skin irritation. Based upon the data, the labels of products that rely on this data should display the signal word "Danger," identify the products as "Corrosive," and show appropriate precautionary language. A review of the signal word and precautionary statements on the labels of registered products indicated that the signal word and precautionary statements on the product labels varied.

SUMMARY OF REEVALUATION

Pursuant to the reevaluation, registrants of pesticide products containing metam sodium were asked to either mitigate the potential acute toxicity effects or to submit specified acute toxicity studies showing that the signal word and precautionary statement on the label of their product were appropriate. In response, some registrants chose to amend the signal word and precautionary statements on the labels of their products, while others chose to develop and submit acute toxicity studies. All amendments to the labels of pesticide products must be submitted to, and approved by, the U.S. Environmental Protection Agency (U.S. EPA) before they can be accepted by DPR.


Due to inconsistencies in the results of acute toxicity tests conducted on identical or similar metam sodium products, U.S. EPA indicated a reluctance to accept amended labels for all metam sodium products. In August 1993, the Metam-Sodium Task Force submitted a letter to U.S. EPA requesting that U.S. EPA "...require the use of the signal word "Danger" on all labels of products containing metam-sodium in concentrations of 30 percent or greater in a liquid aqueous solution form...." The Metam-Sodium Task Force stated that the "...need to harmonize the signal word on labels of products with concentrations of metam-sodium in its liquid aqueous solution form of 30 percent or greater is especially necessary in agricultural applications." U.S. EPA agreed to the Task Force's request and began to accept amended metam sodium labels bearing the signal word "Danger" and accompanying revisions to the precautionary statement.

FINAL REGULATORY DECISION

DPR has determined that the signal word and precautionary statements on the labels of currently registered pesticide products containing metam sodium are adequate to mitigate possible acute toxicity hazards. Therefore, the reevaluation of products containing metam sodium is hereby concluded.

For information regarding this final decision, contact
Ms. Ann Prichard, Senior Environmental Research Scientist,
Pesticide Registration Branch, by E-mail at (aprichard@cdpr.ca.gov) or by telephone at (916) 324-3931.


original signed by Barry Cortez


October 2, 1997


Barry Cortez, Chief
Pesticide Registration Branch
(916) 445-4377

Date








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Peter Rooney

Secretary for
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James
W. Wells
Director