Rosemont Flow-Through Drain Contingencies

The technical memorandum titled Rosemont Flow-Through Drain Design Summary (Tetra Tech, 2010d) was prepared in response to the April 14, 2010 Comprehensive Request for Additional Information from the Arizona Department of Environmental Quality (ADEQ) to Rosemont Copper Company (Rosemont). This request was with regard to the aquifer protection permit (APP) application submitted to ADEQ in 2009 (Tetra Tech, 2009a) for the Rosemont Copper Project (Project). Specifically, Tetra Tech (2010a) answered items nos. 14a and 14b on Page 9 of 18 and no. 15 on page 10 of 18 of the April 14, 2010 ADEQ letter.