proposed rule. amitraz atrazine ethephon ferbam lindane propachlor and simazine proposed tolerance actions by means of this rule and on the basis of available data the agency proposes the following changes to existing federal regulations for the pesticide propachlor currently propachlor tolerances are established for residues of propachlor and its metabolites calculated as propachlor. the agency determined that residues of concern are propachlor and its metabolites which contain the n-isopropylaniline moiety. therefore epa is proposing to revise the tolerance expression as follows a general. tolerances are established for the combined residues of the herbicide 2-chloro-n-isopropylacetanilide and its metabolites containing the n- isopropylaniline moiety calculated as 2-chloro-n-isopropylacetanilide in or on the following raw agricultural commodities epa is proposing to remove the n designation from all entries to conform to current agency administrative practice where the n designation means negligible residues. based on poultry feeding data and mtdb for poultry epa determined that there is no reasonable expectation of finite residues of propazine residues of concern in eggs 0.02 ppm at 60x mtdb and in the fat meat and meat byproducts of poultry as high as 0.02 ppm at 60x mtdb resulting from the feeding of propachlor treated commodities. therefore the tolerances on fat meat meat byproducts for poultry are no longer needed. consequently the agency is proposing to revoke the tolerances on egg poultry fat poultry meat and poultry meat byproducts. epa is proposing to increase the tolerances in on cattle fat goat fat horse fat and sheep fat to 0.05 ppm revise their commodity terminologies to read cattle meat byproducts except kidney goat meat byproducts except kidney horse meat byproducts except kidney and sheep meat byproducts except kidney increase tolerances on cattle meat byproducts except kidney goats meat byproducts except kidney horse meat byproducts except kidney and sheep meat byproducts except kidney to 0.05 ppm and establish separate tolerances for cattle kidney goat kidney horse kidney and sheep kidney at 0.2 ppm. the agency determined that the increased tolerances are safe i.e. there is a reasonable certainty that no harm will result from aggregate exposure to the pesticide chemical residue. epa is proposing to revise the commodity terminology sorghum forage to read sorghum grain forage and sorghum forage forage and increase the tolerance from 5.0 to 8.0 ppm and increase sorghum grain stover from 5.0 to 12.0 ppm. the agency determined that the increased tolerances are safe i.e. there is a reasonable certainty that no harm will result from aggregate exposure to the pesticide chemical residue. epa is proposing to revise the commodity terminology for corn grain to read corn field grain and to increase the tolerance on corn field grain to 0.2 ppm to increase corn forage to 3.0 ppm and revise the commodity terminology to read corn field forage and corn sweet forage. the agency determined that the increased tolerances are safe i.e. there is a reasonable certainty that no harm will result from aggregate exposure to the pesticide chemical residue. based on available data that showed combined propachlor residues of concern no greater than 1.0 ppm in or on corn stover epa determined that the tolerance on corn stover should be established at 1.0 ppm. therefore the agency is proposing to establish a tolerance on corn field stover at 1.0 ppm. in addition epa is proposing to revise commodity terminology to conform to current agency practices as follows sorghum grain to sorghum grain grain.