The Cleanup Standards Scientific Advisory Board (SAB) is a 13 member board that was created by Section 105 of Act 2 which assists the Department by providing technical and scientific advice on matters relating to the implementation of the Land Recycling Act. During the two year period between 1995 and 1997, when the Act 2 regulations were being developed, the SAB worked diligently and met frequently to provide that advice. I attended many of their meetings during that time. They helped develop the statewide health standards and determine the appropriate statistically and scientifically valid procedures to be used to demonstrate attainment under Act 2. Although Act 2 has aged and become a mature program, the SAB remains vitally important to the success of the program. During the most recent meeting held on December 4, 2007, Kevin Reinert stepped down as Chairperson, after having served in that capacity since 2001 and having been an SAB member since its creation in 1995. After the meeting, I had a chance to speak with Kevin to ask him what's currently on the SAB's plate and what he thought were the SAB's most important contributions to the success of Pennsylvania's brownfield program.
At the December 4 meeting, the SAB discussed vapor intrusion and separate phase liquids (SPL), among other topics. The SAB was instrumental in the development of the Department's vapor intrusion guidance and it continues to work with the Department to evaluate the effectiveness of the guidance. According to Kevin, the Department conducted a one month audit in July 2007 of 24 Act 2 sites. The audit found that there were a small number of sites involving the release of gasoline where the site passed the vapor intrusion screen, but sampling of soil gas or indoor air showed that there were exceedances of applicable thresholds. No changes to the program have been made as a result of the audit, but the Department is planning on doing another audit with a representative group of sites in 2008. Another topic still under discussion by the SAB's Attainment Subcommittee is how best to define "maximum extent practicable" as it relates to the remediation of SPL. This has been a dilemma going back to the development of the Act 2 regulations. The issue is at what point do you say that you have done enough to remove SPL from the groundwater. It used to drive me crazy when I was Deputy Secretary and someone would call me to say that the Department wouldn't let then close out a site because there were "flecks of sheen" in a well. We dealt with that issue in both the regulations and the Technical Guidance Manual and now it is possible to get an Act 2 release even though SPL may still be present. It does, however, leave an enormous amount of discretion to the Department. Apparently, the issue hasn't gone away and the SAB has been tasked with doing some case studies with an eye toward helping the Department develop a procedure that will allow a remediator to petition that it has removed the SPL to the maximum practicable extent. It's hard to say where that will go. When we were developing the Act 2 regulations I remember asking the ECP staff to do a 50 state survey of how each state addressed the remediation of SPL. We were looking for a state that had developed a cut-off point, i.e., you can stop when you have less than 1/8 of an inch of SPL. We didn't find any states that had a specific cut-off point and we decided not to create one for Pennsylvania, opting instead for the maximum extent practicable approach. Kevin said that he thought the SAB had considered the idea of a cut-off at 0.01 feet, but that it was never fully debated or put up for final consideration.
The members of the SAB are volunteers who serve without pay other than reimbursement of travel expenses. As a member of the National Advisory Council on Environmental Policy and Technology (one of USEPA's advisory boards), I know that being a member of an advisory board requires a significant commitment of time and energy. In light of the fact that he was stepping down after 12 years, I asked Kevin Reinert what he would remember as the most significant accomplishments of the SAB. He said that the SAB was a group that "brought real world experience" to the Department and provided a sound "scientific basis for decisions" through the development of "empirical and practical approaches." He said all of the SAB's members were there "to do the right thing" and "help build a good program" that had at its heart, the protection of Pennsylvania's environment. In terms of accomplishments, Reinert reminded me that the SAB developed the Ecological Risk Screening Procedure, which was developed in response to a specific request from the Department. At the time, we had a set of numbers that everyone knew where safe and protective for humans, but the statute mandated that the Act 2 standards be protective of human health "and the environment." The Eco-screen developed by the SAB bridged that gap. It was innovative and, as Kevin said, put Pennsylvania in the front of the pack by creating a streamlined way of dealing with ecological impacts. He also said that he was proud of the contribution that the SAB made to the development of the vapor intrusion guidance.
At the conclusion of my discussion with Kevin Reinert, I thanked him for all of the work he has done on the SAB. He should be proud of his contribution to the success of Pennsylvania's brownfield program.
I'll keep my eye on DEP's website for minutes of the recent SAB meeting and I'll supplement this posting when I see what additional topics were discussed.