From 2001 through 2004, ACS conducted the research, fieldwork, and writing for the hydrology and discharge characterization sections of the Aquifer Protection Permit (APP) for the Phoenix Cement Company (PCC) Clarkdale Cement Plant in Clarkdale, Arizona. The PCC Clarkdale Cement Plant is over 45 years old with numerous ponds, landfills, truck washes, a limestone quarry, and miscellaneous discharging facilities. Working as a subcontractor to the Gault Group, ACS’ work on this project included: review of existing boring logs; development of a plan for a geophysical investigation and hiring of the geophysical subcontractor; development of groundwater and surface water sampling plans, including the use of stable isotope analysis for water samples; conducting groundwater, surface water and soil sampling; and development of a site conceptual hydrogeologic model. ACS also completed the following for this project: wrote the discharge characterization section of the application; completed an administrative and technical review of the entire application; consulted on the regulatory classification of the discharging facilities; reviewed the plans and specifications for pond liners relative to Best Available Demonstrated Control Technology (BADCT) requirements; consulted on the financial guarantee section; assisted in the writing of the site investigation plan; wrote portions of the substantive review responses; and interacted with the Arizona Department of Environmental Quality (ADEQ) on behalf of the client.
