liquefaction, liquefaction is a term they use when the ground is loose. usually when structures or infrastructure is built on sand or land fill, something that's not solid, what happens is in shaking, during an earthquake, the earth that's very loose, that sand or land fill, acts like water. this is sand, sand and water coming up through a hole. in japan, all these buildings were built on liquefaction. i forget what year this was, but it was one of the bigger earthquakes. 7 story buildings built on liquefaction. the amount of time the earth shook, the earth became liquid and as it became liquid, the building sank into it until it stopped. when it stopped it just fell over. light damage buildings, superficial damage, broken windows, some plaster that might be cracked but basically a light damage building would be one that has mostly damage to the contents. shelves falling over, windows broken, that type of thing. if you had to go into a light damaged building, you would use these procedures. of course you gather information about a building before you go i

>> liquefaction -- the crown settles, but it is not a catastrophic -- the ground settles, but it is not a cass strophic event. you might give boiling of water. >> and dynamic compaction. i assume there is an environmental impact report. what would happen to the bay creatures? i would imagine if he made a loud noise -- he made it sound like it was an earthquake simulation. >> it is really no worse than a pile driving operation. it is not a loud noise at all. so, once we go through those two concepts -- [laughter] once we go through those two procedures, of be anticipate losing two to 3 feet of elevation. we will have to bring soil in to bring that up to development grade. i will go into that in a moment. just over 1 million cubic yards will be imported. >> foreign alta to -- for an altitude increase of how much? >> i will get into that. we anticipate that buildings from six stories to 10 stories can be built on conventional foundations. they will not to have -- they will not have to have a pile driving. the taller ones will have to have piled foundations. >> i want to point out -- in the

developers, are trying to reinvent themselves and create models of the bills, plain no attention to liquefaction, flooding, and tsunami parent of treasure island is a no brainer. this is a man-made island. it is sinking two inches every year. i respect those of you that back to the community. you do the right thing. people come here, create new models. you represent the community. thank you. >> i would like to bring some more good news. the funding has been approved so hopefully the project will be moving forward within 62 -- within 60-90 days. thank you for your support. >> thank you. is there any additional public comment? public comment is closed. >> commissioners, if we can move forward on your calendar to commissioner's questions and matters. item numberone is consideration of draft minutes on your special meeting of january 24th and your regular meetings of february 24th, march 17th, march 24th, 2011. i would like to state for the record that there needs to be a correction on the regular meeting of february 24th, item 13. this is confusing. if we can eliminate the votes as they are shown a

that event in new zealand, liquefaction is something that we talk about, but until you see pictures oft right after it happened, i would encourage people to look at pictures of new zealand, christchurch after the event. they brought back pictures of a car. this really brought it home. we talk about this all the time and it is absolutely, positively the truth. neighbors are the ones that rescue neighbors. that is what happened in japan, that is what will happen here, are partners with the red cross and every other agency, we have to keep the focus on community resiliency. does anybody have any comments on christchurch new zealand? the japan van, very early, there will be a lot of lessons to be learned. we don't have the experts to really dissect it yet, i wanted to hone in on the experience in washington, the ringside seats in trying to get a public message out about this event. we were there 48 hours after the earthquake and a tsunami. mr. the really deal with the radiation aftermath. watching our partners in the federal government having offline conversations with them, they got hung

if we have an earthquake and a tsunami, there will be liquefaction. the experts are talking 1000 fold. those homes that toppled them, that is what is going to happen. i am here to tell you that this city is sending mixed signals. they are talking about buildings on treasure island, but that is the first place where a tsunami is going to hit. we're going to talk about building 10,500 homes. 95% of that area, the hills were demolished, that is all landfills. we learned some from 1989 when the piers fell down. collapsed into the bay. but we are sending mixed signals. the so-called experts, the supervisors that represents the [chime] you have to have the money to fulfill the actions and to save the homes. supervisor mar: anyone else that would like to speak? mr. paulson? >> ♪ we'll shake it up city shake it up city fix it all about fix it about ♪ ♪ i hope i make it makes the safety work onnow -- on now won't you fix it up fine ♪ ♪ land use make the item safety shine make it shine dig a little bit closer know this city's yoursan and mine work this city's s

there was a lot of water damage we might have even had some liquefaction soil failure. we had a major failure. >> that's right. this tribute goes all the way to golden gate. this is in a mountain lake and beyond ththat, it was a surface flow. this is a reservoir. on my right is this defensive the positive dune sand. the wind blows, it comes from the ocean beach. because the sand is moving, you can see evidence along this side of the hill in 1989. the vibrations in accelerated. you have a significant amount of movement to the point that the homes that uc had very severe damage for two blocks. we recognized what the problem was at the time, it was a matter of loose sand on a very steep slope. thank you for the effort. we were able to get federal funding and design which you see in the upper walls. the lower walls was actually billed as part of the wpa. the upper wall was built in 1991-'92. this is a concrete wall and it has rocked going through the wall that extends the distance of 80 feet beyond the wall. the next earthquake occurs, the wall is designed to resist and the

if we have an earthquake and a tsunami, there will be liquefaction. the experts are talking 1000 fold. those homes that toppled them, that is what is

xw geotechnical issues, if you're in land side area oz liquefaction areas, these things are not taken into account. >> chairman, how prepared are schools? it sounds like state officials are saying we don't know. >> well, it's very interesting that when i first came to the legislature 12, 13 years ago and i wanted to do legislation to find funding for schools, i found that there was no information available so i could prove my case. so i could make the case these how many -- these are the number of buildings that we need, here's the problem. so i think that there are a lot of wonderful people, well meaning people, that make sure our kids are as safe as they can be and there are school districts that have gone way beyond what they should have had to in passing their own local bond. they've found the funding to do seismic retro fit. but we still have many older school buildings that could and should be seismically retro fit. >> bill savidge, what is your experience dealing with the state? because they're saying that in many cases this is sloppy paperwork, that the local districts haven't