Executive Summary for Semi-Annual Groundwater Monitoring Report, Third And Fourth Quarters 2004, Presidio of San Francisco, California

The Presidio-Wide Quarterly Groundwater Monitoring Program continued, with modifications, during the Third and Fourth Quarters 2004. Sampling occurred during the second full week of August and the second and third weeks of December 2004. Several modifications to the Presidio-wide Quarterly Monitoring Program were implemented during the Third and Fourth Quarters 2004. The majority of the changes were associated with removal of sites from the program, reductions in sampling frequency at sites with