180.297—N -1-Naphthyl phthalamic acid; tolerances for residues.
        
        (a) General.
         Tolerances are established for residues of the herbicide N -1-naphthyl phthalamic acid from application of its sodium salt in or on the following raw agricultural commodities:
    
    | Commodity | Parts per million | 
|---|---|
| Cantaloupe | 0.1(N) | 
| Cucumber | 0.1(N) | 
| Muskmelon | 0.1(N) | 
| Watermelon | 0.1(N) |