This is a graph representing the Total Chromium and Hexavalent Chromium levels in PZ- 7r. Click on the image above to view this graph and the specific data for this OTC in an Excel document.

• Margaret V. Merritt, Chemistry Department
• Created by: Kate Golder
• Wellesley College
• Date Created: June 28, 1999
• Last Modified: September 3, 1999
• Expires: August 31, 2000