children with disabilities, and even a sand garden with chines and drums. >> it is a visionary $3.5 million world class playground in the heart of san francisco. this is just really a big, community win and a celebration for us all. >> to learn more about the helen diller playground in dolores park, go to sfrecpark.org. but the anniversary of the great earthquake was remembered. >> i would like to ask for a minute of silence. >> let's have a moment of silence.

>> they meet for the annual reflating ceremony. he was joined by winnie for an afternoon celebration. we are here to commemorate all that it signifies. at each anniversary the leaders

meet to prepare for the next great quake. bob welcome everybody to the anniversary. i got to say, the mayor gets it done. gooa round of applause for our e

chief's wife. you look terrific. do we have sydney close five? -- close by. we will pass the microphone to the mayor for a couple of quick words. we have a fire chief and the police chief. >> good morning, everyone. 106 years since our earthquake.

we do have a grandson? she was with us in 2009. goopublic works is here.

this reminds us of the 3000 people but passed away in 1906 from the devastating earthquake, but the rebirth of our city is with us. i have been in all of these other positions where we are always prepared. and we are already engaged in recovery efforts. we were there with a whole staff. we have six we assure you that when the next big event happens, that water system will be there for us to deliver water with that 24 hours.

a huge change from depending on this fountain. we are handing it off to generations of youth in the city to understand -- make sure they're prepared. go to our website, it tells you all the things there. iti is about having those items prepared.w we will survive. that is how we get ready and celebrate and honor the people who left us and make sure our city is ready. thank you for being here. congratulations to our survivors. >> very nice job. behind me is a good friend and a great firechief.

you go back 106 years. braxton morning. -- good morning. one of the survivors could not be with us. those are amazing changes. it does give us the opportunity to remember what happened. we commemorate those who suffered losses in their lives and hardships. we also celebrate the city that was nearly swept from the map. the fires raged for three days and caused rates -- great devastation. we take the opportunity to educate everyone. it is a pleasure for me to work under the direction of mayor lee. he is a public safety

championship. he is a prepared as champion. he lives it. i have seen his kids and his workplace. it is all about teamwork. i am proud to be working with chief suhr. and scott weiner, it is a pleasure to have you out here. we appreciate it. it is a great team. thank you to the people who are out here. and also our partners with the american red cross. who are here this morning. thank you for being here. it has been a tradition for many of us out here. i hope you have a great day and you remember what happened 106 years ago. it is great to be a san franciscan.

>> a nice hand for the chief, everybody. i have seen this other chief speaking in the last couple of times. a nice hand for chief suhr. >> good morning. our fire chief said it. we're lucky in san francisco. we have a mayor who has moved through the tears of prepared as an goddess ready to go. we get a little more prepared every day. god bless to the survivors. >> thank you. >> it is a minute of silence at 5-11. -- 51:11 p.m. let's have a moment of silence for a minute right now.

[siren]

>> i think the fitting way to end this germany first of all, -- this ceremony first of all. there will be playing. everybody have their words right

here? i will give the countdown. as we hang the reece, i will give you a count here. have a look at me. 1, 2, 3, 4, 1. ♪ [singing] ♪ ♪

>> a great day, everybody. thank you. the san francisco chornicle. and the history association. and the neighborhood emergency response team. the american red cross. and thanks for making this happen. i want to invite everyone to go to 20th in church or -- and

church. and we will meet up. we may skirt the law and serve something before 6:00 a.m. the bookmobile, where are they? >> i have my cheat sheet here which i cannot find. the library has been here after great disasters. there has -- is a special book that won an award this year. here is the book. i downloaded it on my kindle. it can check out copies of the book mobile. nex>> thanks for being here.

start walking slowly. welcome to san francisco, everyone. ♪ because we have a great waste water system here in san francisco, we do about 80 million gallons of waste water here in san francisco, which means we basically fill up 120 olympic sized swimming pools each and every day here in the city. we protect public health and safety and environment because we are discharging into the bay and into the ocean. this is essentially the first treatment here at our waste water treatment facility. what we do is slow down the

water so that things either settle to the bottom or float to the top. you see we have a nice selection of things floating around there, things from bubble gum wrappers, toilet paper, whatever you dump down the toilet, whatever gets into our storm drains, that's what gets into our waste water treatment and we have to clean. >> see these chains here, this keeps scum from building up. >> on this end in the liquid end basically we're just trying to produce a good water product that doesn't negatively impact the receiving water so that we have recreation and no bad impact on fish and aquatic life. solids is what's happening. . >> by sludge, what exactly do you mean? is that the actual technical

term? . >> it's a technical term and it's used in a lot of different ways, but this is organic sewage sludge. basically what it is is, oh, maybe things that come out of your garbage disposal, things that are fecal in nature. it's sludge left in the water after the primary treatment, then we blend those two over and send them over to digestion. this building is built to replace tanks here that were so odoriferous they would curl your hair. we built this as an interim process. >> is there a coagulant introduced somewhere in the middle of this? . >> this coagulant brings solids together and lets the water run

through. that gives us more time in the digestion process, more time to reduce the amount of solids. these are the biggest ones in the world, like we always like to do in san francisco. they are 4 meter, there's none like it in the world. >> really? wow. >> three meters, usually. we got the biggest, if not the best. so here we are. look at that baby hum. river of sludge. >> one of the things is we use bacteria that's common in our own guts to create this reduction. it's like an extra digestion. one of the things we have to do to facilitate that is heat that sludge up and keep it at the temperature our body likes, 98.6 degrees. >> so what we have here is the heat exchanger for digester no. 6. these clog up with debris and we're coming in to -- next wet

weather season so we always come through here, clean them out, make sure that we get maximum heat exchange during the colder wet weather. sludge season. >> rubber glove. >> right here. >> rubber glove, excellent. all right, guys. >> thank you. >> good luck. >> this is the full on hazmat. . >> residual liquid. we're taking it time to let it drain. we don't want to get sludge on it necessarily. take your time. stand on the side of it. . >> should we let it release for a while? . >> let it release. >> is that the technical term? . >> this is the most important

bolt on the whole thing. this is the locking bolt. it locks this thing right in place. so now. >> take your hammer and what we want to do, we get rag build up right in here. the hot water recirculates right in here, the sludge recirculates in here. the sludge sometimes has rags in it. all we want to do is go around the clean the rags. let me show you how. take the slide hammer, go all the way through the back, go around. >> got you. >> during the real rainy season, how does that change the way dealing with this job? is it a lot more stuff in there? . >> what we do, charles, we do this quarterly. every four months we go around and clean all the heat

exchangers so we don't have a large build up. . >> go around? . >> yeah. (sound of hammering). >> what i'm trying to do, charles, is always pull it out on the low stroke. >> right. so you are not, like, flying out. now talk about clean up. . >> then where does this stuff get deposited? . >> we're going to dump it in a debris box and it will go back

to the plant. >> if you think back, the romans came up with a system of plumbing that allowed us it use water to transport waste away from the hub of civilization, which enabled cities to grow. . >> you have a large bowl, a drive motor and another motor with a planetary gearbox with differential pressure inside there. the large mass up there spinning separating the solids from the liquid. we have to prevent about once a month, we go in there grease those, change the oil, check the vibration levels. the operators can tell just by the hum of that machine that it's a harmonic noise emitted that it's out of balance and the machine needs to be cleaned. it will start vibrating and we

have vibration analysis machines that will come over here and check the levels. so it's kind of an on-going thing that you have to stay on top of on a daily basis. >> handled properly, you take organic residuals, as we call them, that are leftovers of our society and turn them back into some energy. and we have another ability to take that sludge and get a nutrient value for crops there. we actually are running a kind of composting energy recovery system. >> well, this is a dirty job. we try to do it safely and we try to do it without imposing too much on the public. people want to flush their toilets and have things go away and not be bothersome again. we do a lot to try to accomplish that. i'd like to invite you to come back any time you want.

once you got this in your blood, you are not going to be able to stay away. the raging waters are fun and when we do digester cleaning i really hope you can come back. that's quite a sight. >> yeah, that sounds interesting. >> i really appreciate you coming by and it was a >> good morning. good morning. thank everybody for being here. what a wonderful, marvelous day in san francisco. commissioner david stern is almost clairvoyant in such a way.

he is a marketing genius. years ago, he came up with the slogan "i love this game." when people say that, you know exactly what they are talking about. they are talking about an nba basketball game. one of its marketing slogans from this season is -- big things are coming. we had a great season. we are having a big playoff run right now. it is more than certainly appropriate for today because five years from now, there is going to be the most impressive of arena in america sitting right here on the spear -- this pier. i'm not sure there is any bigger news in the nba, except maybe that the warriors got a big man, but it goes along with the whole thing. today is the culmination of incredible vision by a mayor and a group of owners, who are 100% committed to creating something really special for the citizens

of the bay area, not only basketball fans, but everyone interested in entertainment. it is rare that a sports team has the ability to impact an entire region. the building of this venue in the country will have positive ramifications on fans far and wide. that is unique, and that is what makes a tremendous day for the city of san francisco, the warriors, and the entire bay area community. i would like to introduce to you some of our speakers on the day is today. the city's 43rd mayor and the city's first asian-american mayor in the city's history. he is from seattle, i'm from tacoma, and we have that together. he is known as a job as mayor and an innovation mayor for his focus on job creation and economic development. ladies and gentlemen, san francisco mayor, ed lee. [applause] mayor lee: thank you.

good morning, everybody. welcome. it is great to be reunited with my long-lost brothers, separated at birth. david lee, his younger brother. i just wanted to welcome all of you. we have a great representation of the whole city family here today. commissioners from our port, staff from our ports, the recreation and park department, our planning department, we have our board of supervisors from hong all of the different districts. we have representatives from chinatown, bayview, sunset, bernal heights, ever with this city is committed to working with the warriors to make sure we have this i read a billed by the 2017 nba season, and we are very committed to getting that done. the warriors have in the bay area's basketball team for 50 years, and today sets the stage for the warriors to be our bay

area team for another 50 years. [applause] all right. it has been 41 years since the warriors played here in san francisco, and in my humble opinion, it is time to welcome them home. [applause] this new sports and entertainment facility will bay area residents. it will generate tens of millions of dollars in economic growth each year, and games and events will bring people from all over the region. the money they spend will benefit our local economy and our local businesses. this project will be more public transit accessible than almost any other are rena in the nation. it is accessible to bark, and unique, the ferries, and our new transbay terminal that will be up and running in the next

three years, making it easier for people from all over the bay area to come to games without driving. this project will also be a responsible development. we're talking about taking a pier that has been the home and host of our ships coming from the military, and international cruise ships from all over the world, canada, and europe, but it needs a lot of work. it needs major work. it needs cleaning up and strengthening the site and making it usable. we are not developing on any existing green spaces. we will be adding new ones and bringing thousands of people to the waterfront. this project means enormous economic growth for our city. thank fo