Cost analysis.

A Linear Regression Analysis was done using design flow or the 2002 average yearly flow as the independent variable and the cost as the dependent variable. Actual cost data used for this analysis was obtained from data received from applications for Act 218 grant money to PENNVEST and a survey of systems completed by the Pennsylvania Municipal Authorities Association. Cost data from these two sources was adjusted to 2005 costs using the ENR construction cost indices supplied by the Chesapeake Bay Program.