1. AFCEE. 1997 Long-Term Monitoring Optimization Guide-Version I I U.S. Air Force Center for Environmental Excellence, Brooks AFB, Texas
2. Review of geostatistics in Geohydrology I: Basic concepts;ASCE Task Committee on Geostatistical Techniques in Geohy-drology.;Journal of Hydraulic Engineering,1990a
3. Review of geostatistics in Geohydrology II: Applications;ASCE Task Committee on Geostatislical Techniques in Geohydrology.;Journal of Hydraulic Engineering,1990b
4. ASTM. 1998 Standard Guide for Remediation of Groundwater by Natural Attenuation at Petroleum Release Sites El 943-98, American Society of Test and Material