SEPARATE PHASE LIQUIDS (SPL) SUBCOMMITTEE OF THE CLEANUP STANDARDS ADVISORY BOARD

The SPL subcommittee held a meeting on Friday November 5, 2004 at 10:00 am in the Rachel Carson State Office Building (PADEP) in Harrisburg. The following subcommittee member and participants were present: Samuel Fang PADEP Cullen Flanders Groundwater and Environmental Services, Inc. Michael Heffron Tetra Tech FW, Inc. Dave Hess PADEP Victor Kremesec Atlantic Richfield C./BP Joe McNally Geo Services, Ltd. Mark Mummert Harsco Corporation Ken O’Korn Earth Tech, Inc. Ramesh Shimoga Shaw Environmental, Inc. Derek Tomlinson Environmental Resources Management, Inc. Pamela Trowbridge PADEP Sonya Ward ENSR International Mike Young Severn Trent Laboratories, Inc. Mark Mummert opened the meeting by welcoming everyone and asking everyone who was present to participate in the discussions. Dave Hess reviewed the current approach used for SPL under the Act 2 program. He noted that to attain the statewide health standards no SPL may be present at the point of compliance. The site specific standards allow SPL but the affected media must be sampled. For SPL from regulated tanks, compliance with the storage tank regulations is required. Ken O’Korn discussed a possible approach for SPL that would parallel the NPDES program. Both performance-based and water-quality-based limits would be considered; with an Act 2 applicant choosing which one should apply at their site. Victor Kremesec and Derek Tomlinson reviewed the API documents and software. These documents were intended to be educational, technology based items. The software provides a tool to estimate SPL volumes and recovery times from porous media. The committee agreed that they are useful and should be included in the Act 2 program similar to the fate & transport tools currently on the Land Recycling web site. A suggestion was made that the subcommittee should focus on the data collection required to use the software and that training on this topic would be helpful. Victor Kremesec noted that the LNAPL Cleanup Alliance RTDF and EPA Region 4 LUST Group have developed training materials that incorporate the API documents and spreadsheets and those materials have been accepted for technical content. They are currently undergoing review by EPA Office of General Counsel prior to being released for public use.