Appendix C:

Databases of Acres Where Concentrations Exceed Water Quality Thresholds by Watersheds

The databases are presented as pipe delimited ASCII files available for downloading.
Headings are the same as those used for the state tables in Appendix B.

• Database C1. Acres (1,000) Where the Potential Atrazine Leaching Concentration at the Bottom of the Root Zone Exceeds a Multiple of EPA's Maximum Contaminant Level (3 ppb)
• Database C2. Acres (1,000) Where the Potential Atrazine Runoff Concentration at the Edge of the Field Exceeds a Multiple of EPA's Maximum Contaminant Level (3 ppb)
• Database C3. Acres (1,000) Where the Potential Alachlor Leaching Concentration at the Bottom of the Root Zone Exceeds a Multiple of EPA's Maximum Contaminant Level (2 ppb)
• Database C4. Acres (1,000) Where the Potential Alachlor Runoff Concentration at the Edge of the Field Exceeds a Multiple of EPA's Maximum Contaminant Level (2 ppb)
• Database C5. Acres (1,000) Where the Potential Cyanazine Leaching Concentration at the Bottom of the Root Zone Exceeds a Multiple of EPA's Health Advisory (1 ppb)
• Database C6. Acres (1,000) Where the Potential Cyanazine Runoff Concentration at the Edge of the Field Exceeds a Multiple of EPA's Health Advisory (1 ppb)
• Database C7. Acres (1,000) Where the Potential Metolachlor Leaching Concentration at the Bottom of the Root Zone Exceeds a Multiple of EPA's Health Advisory (70 ppb)
• Database C8. Acres (1,000) Where the Potential Metolachlor Runoff Concentration at the Edge of the Field Exceeds a Multiple of EPA's Health Advisory (70 ppb)
• Database C9. Acres (1,000) Where the Potential Simazine Leaching Concentration at the Bottom of the Root Zone Exceeds a Multiple of EPA's Maximum Contaminant Level (4 ppb)
• Database C10. Acres (1,000) Where the Potential Simazine Runoff Concentration at the Edge of the Field Exceeds a Multiple of EPA's Maximum Contaminant Level (4 ppb)