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 >> the rs

to vote for candidates or party and it is a significant way to have our voice heard. exactly 100 years ago, women were given the vote in california. the battle for women's suffrage was not an easy one. it took more than 70 years. a woman could run for president in new york. >> organizing this conference,

basically it modeled itself on a declaration of independence for women. it marked the beginning of the women's equality movement in the united states. >> at that time, women were banned from holding property and voting in elections. >> susan b. anthony dedicated her life to reform. >> suffrage in the middle of the 19th century accomplished one goal, it was diametrically opposed to this idea. >> many feared it would be corrupted by politics.

>> women in the 19th century had to convince male voters that having the vote would not change anything. that woman would still be devoted to the home, the family, that they would remain pure and innocent, that having the vote would not corrupt them. >> support gradually grew in state and local campaigns. >> leaders like ellen clark sgt come repeatedly stopping these meetings -- , repeatedly stopping these meetings as a politically active figure. doing everything they could to ground the campaign in domesticity.

>> despite their efforts, the link made it tough whenever voters were in the big city. a specialist in francisco. >> the problem with san francisco is that women's suffrage as an idea was associated. >> susan b. anthony joined the provision party. a deadly idea in san francisco. liquor was the foundation of the economy. and >> anything that touched on the possibility of prohibition was greatly and popular. >> the first campaign was a great effort, but not a success. >> the war was not over.

less than one decade later, a graphic protests brought new life to the movement. >> women's suffrage, the republican convention in oakland, this time it was the private sector response. 300 marched down the streets of the convention center. women were entitled to be here. >> joining together for another campaign. >> women opened a club in san francisco. it was called the votes for women club.

if she could get the shopkeepers to have lunch, she could get them to be heard literature. the lunch room was a tremendous success. >> it was the way that people thought about women willing to fight for a successful campaign. what happened was, the social transformation increase the boundary of what was possible, out word. >> there were parades and rallies, door to door candidacies, reaching every voter in the state. >> the eyes of the nation were on california in 1911, when we all voted. it was the sixth and largest state in the nation to approve this. one decade later, we have full

voting rights in the united states. helping newly enfranchised women, a new political movement was founded. >> starting in the 1920's, it was a movement created by the suffragettes moving forward to getting the right to vote. all of the suffragettes were interested in educating the new voters. >> non-partisan, not endorsing candidates >> -- endorsing candidates, getting the right to vote and one they have their voice heard. >> the 100th anniversary of

women's suffrage is taking place throughout the state. bancroft library is having an exhibit that highlights the women's suffrage movement, chronicling what happened in california, bringing women the right to vote. >> how long does this mean going on? >> the week of the 20th. people do not realize that women were allowed to vote as early as the 1920's. in the library collection we have a manuscript from the end of december, possibly longer. >> in commemoration of 100 years of voting in california. 100 years ago this year, we won

the right to vote. around 1911, this is how it would have addressed. and here we are, dressed the same. [chanting] >> we have the right to vote. >> whether you are marching for a cause or voting in the next election, make your voice heard. thank you for watching.

>> this is a dpw corporation yard. i work for the bureau of street environmental services used to be street cleaning. we are a new age. >> here we are. >> here we are. >> clean. >> these are our communications dispatchers. hi. okay, no problem. you are welcome. bye-bye. >> all the information about the location, the nature of the complaint and we dispatch it. >> near the steps. >> by new they have started a hundred calls for dispatchers.

>> once a get a request if they are not on the air i will page that unit. these are the radio channels. we have 14 channels. i will give a service request. >> there is a lot of expertise that goes into a call. i think we can have you dispatch and track. >> 448. >> 448. >> 19th at california. >> can you give us a little bit of a view. >> we have the city broken up to different districts. we will go to zone e. we will go to iowa street. put me to work.

>> okay. >> bend it over like that. we chop it. >> while you do this if you come across something that looks hazardous, material wise, >> like this paint? >> you can't take paint. >> that gets dealt with by? >> we have a patrol truck thal pick up the paint. >> we have tv monitors and tires. you want to look for needles we don't mix needles with the garbage. >> you have to be a positive person in a way to deal with

this job. you are dealing with areas you know it's been cleaned. >> basically it happens a lot where you clean up an area. you come back a couple of days later and it's back to that again. we more or less are used to it. that's -- it's our job. you have to get used to it. it's a fact. that's the way it is. >> sure. yeah. >> okay. >> what do you think, are you ready to sign up? >> totally. i'm over dressed. >> a little warm? must be the sweat. >> part of the daily routine is

george our steamer. you see the wall people urinate on the and the sidewalk. a trick. i get it up like this. somebody got to do it. the bigger they -- >> pull the trigger. >> careful, the water's really hot, too. >> i have been on a packer truck. i painted removed graffiti. my favorite. >> what's that smell? pine. one of my favorite, a guy got his head stuck in a trash can. we had to get vasoline and rub

his ears. [laughter]. what goes on here we will empty out and clear this area. >> ever find stuff like drugs or anything? do you deal with that. >> i don't know, do you find anything? >> everything's trash. >> dave, let's get a little of that. >> the way to do it easier without opening the can is push off the debris off the top and you are topping off the can. we are not supposed to empty the can. there is a can on every corner. sometimes we get calls the majority of my work is done on eyesight if i see it i do it. downtown we fill up 3 or 4 times

a day. >> daily it could change and be various different assignments that come up. we can swing by, we see some of the trucks unloading in the area. >> this is our dump site, this is where we dump the debris. we come twice a day to unload all the trucks. i need you to go on up there and he will assist you to unloading the mattress and the futons. >> okay. okay. >> sometimes you see it popping out. you have to be very careful.

pushing in and down. pull it out. >> you have been here once earlier? >> did you have as much stuff? >> more. >> oh , my god. >> did you survive your day in dpw? >> i did i learned quite a bit. the packing truck. shovelling stuff. the steamer i thought i was a candidate for an industrial accident. >> we have 340 employees. most of the people out there do it every day. >> i'm ready to turn in my vest. >> did a good job today. >> would you pass him on probation. >> yes. see you tomorrow at 6