those contaminants are from naturally occurring sources such as the serpentine rock that was used to create the land, and also historic industrial operations. those exceeded cleanup levels for all of the three different anticipated future uses, which would be commercial, recreational, and residential. virtually everywhere. conversely, ground water was found to contain metals and petroleum hydrocarbons. at concentrations it did not propose a human health impact or held to the environmenimpact to we found a couple of constituents above clean up level at different locations throughout the site, some of which were not confirmed through repeat sampling. there is really no indication we have a problem with soil gas at pier 70. the human health risk estimate, which was conducted in conjunction with the site investigation found the greatest hazards associated with environmental contamination or future site users, the commercial, recreational, and residential users exposure to native soil and construction workers' exposure to soil, and potentially ground water because there excavating in an a

historically the story line was comprised of serpentine rock bluff overlooking mud and the early developers created new shoreline land, at least in the pier 70 area, blasting the rock bluff and pushing the rock and debris onto the mud flats. additional material was placed to create new land of material as well. as a result of the way the soil that makes up here 70 came to exist, the material that was used to create it and a long history of industrial operations, there are many significant sources as contaminants there, and as a result, there has always been uncertainty about what was out there, what it would take to mediate it, and how much the radiation at -- mediation would cost and how would impact for future development. with an awareness of those issues, and 2007 thin 2007 the sought a development with the support of the mayor's office and congress woman pelosi's office, that was awarded to the port through the u.s. department of commerce's economic development administration in late 2008. the grant award was for 2.2 $8 million to be used to investigate and clean up environmental conta

we found very high concentrations of the metals that are indigenous to serpentine rock. arsonist, zinc -- there is a list of laundry-recurring models that we did find. -- there is a laundry list of recurring metals that we did find. >> it sounds like a thorough approach to a problem. thank you. >> what remedy will happen with of paah's that have leached from the plant? >> pg&e is in the process of starting the feasibility study. they have done at some events scale, all side of the laboratory tests on different remedial alternatives that might work on this manufactured gas plant related contamination. whenever remedial alternative they come up with will include the portion of the contamination that has extended to meet the port property, but we do not know what that is. we have been working really closely with pg&e team working on this remedial action plan for a feasibility study. if the commission would be happy from -- happy to hear from them, i would be happy to get them? . >> i know there were several options and i thought we were going to use option 3 throughout the