A Senate budget subcommittee rejected Gov. Gavin Newsom’s water tax plan on Wednesday, instead recommending finding $150 million elsewhere to finance a safe and affordable drinking water fund. Newsom proposed the tax in his January budget to help communities clean contaminated water systems. His May budget revise also included a fee to address the statewide problem that affects one million Californians.
Californians proudly regard themselves as early adopters and trendsetters. So, of course, they’ll be the first to experience an aberrant weather pattern that is expected in the continental United States over the coming days. A jet stream sagging into the mid latitudes is forecast to drive into the Golden State some unseasonably late precipitation and a lot of it starting Wednesday and continuing into the weekend.
As California faces more frequent and severe droughts, agriculture, which relies on irrigation from surface water and groundwater, could become expensive and unsustainable. Researchers at the University of California, Davis, looked at using a “free” resource rain water stored in the soil and found that optimizing its use could go a long way to help meet demand for five California perennial crops. Their findings appear in the journal Environmental Research Letters.
Problems in wastewater systems can’t hide behind a smokescreen at the Vallecitos Water District. The district’s Systems Collection Department routinely performs “smoke testing” of its wastewater system. This technique can easily locate flows caused by broken or incorrectly installed sewer pipes, lateral connections, or missing/broken clean-out caps.
The test is performed by introducing smoke, comprised primarily of steam, through a device similar to a fog generating machine, into the wastewater systems. Staff can see if smoke comes out of the system through any leaks or breaches.
“We don’t want clean rainwater entering the sanitary sewer system, because we don’t want to treat clean water down at the treatment plant,” said Matthew Thompson, VWD wastewater collection worker. “We also don’t want to have an open system in case of an emergency, where liquids could exit the system.”
Residents are notified prior to any smoke testing in their neighborhood. The use of the smoke is an approved practice by the U.S. EPA and has no adverse health effects. The smoke used by VWD is non-toxic and dissipates quickly. During the testing process, residents can assist by monitoring the plumbing systems inside their homes to see if they have any internal problems.
Crews inject smoke into the sewer system. It bypasses the living quarters of each residence before rising out of vents located on the roof. This is what crews are looking for, because it’s a good indicator there are no illegal hookups to the sewer. Smoke may also escape if the private sewer lateral clean-out is missing its cap.
If smoke emits from the home’s storm drain system or front yard, it could mean there is a possible illegal system connection, or an opening to the sewer that can lead to surplus water levels and subsequent sewer spills.
Field crews take care of any problems that may arise during testing. Residents are notified to disconnect illegal connections or face potential future fines. While the district does not maintain the plumbing inside homes, including the sewer lateral or the clean out, district crews will make simple, inexpensive repairs on the spot as a service to their customers. A doorhanger is left after any quick-fix is completed.
Vallecitos Water District Wastewater Collection Systems workers Dennis Richardson (standing) and David Saavedra inject smoke into the sewer system. Photo: Vallecitos Water District
“Our ultimate goal is to make the customer happy, and that there is no interrupted service,” said Thompson. “If you see any of the wastewater crew out in the street, feel free to come talk to us and ask us what we’re doing. We’d love to share how we’re helping the system flow.”
In some cases, customers identify sewer problems themselves. District Systems Collection Department staff then determine the source of any potential problems, and how to resolve those problems.
Smoke testing isn’t new, but it might catch residents off guard. It has been used since the 1950s. For more than 10 years, smoke testing has proved to be a valuable ally in sewer maintenance. The Vallecitos Water District performs a minimum of four tests annually to keep its system operating at the optimum level.
Problems in wastewater systems can’t hide behind a smokescreen at the Vallecitos Water District. The district’s Systems Collection Department routinely performs “smoke testing” of its wastewater system. This technique can easily locate flows caused by broken or incorrectly installed sewer pipes, lateral connections, or missing/broken clean-out caps. The test is performed by introducing smoke, comprised primarily of steam, through a device similar to a fog generating machine, into the wastewater systems. Staff can see if smoke comes out of the system through any leaks or breaches.
Remember atmospheric rivers? Earlier this year, they hit California’s collective consciousness in a big way, as the state reeled from the catastrophic flooding, mudslides and pounding rain they brought with them. This week, much to the dismay of anyone eyeing a weekend outdoors, atmospheric rivers are back and forecast to pour cold water (and snow) on the Bay Area and other parts of California. As Daniel Swain, a climate researcher and the author of the Weather West blog, put it: “Enjoy the upcoming 10 days of ‘Mayuary.’”
The nation’s first big-city ban on the use of facial-recognition technology by municipal agencies and local law enforcement passed Tuesday in San Francisco, signaling the next front in the debate over data privacy. Voting 8-1, supervisors in the tech hub made an exception for federally regulated facilities, like the airport. Oakland is considering a similar measure, and San Francisco Assemblyman Phil Ting has authored a more limited statewide version. SF police actually don’t use facial recognition. But privacy advocates say other law enforcement agencies do (San Jose, San Diego, California Department of Justice), that the technology can violate privacy, and that it can be inaccurate, especially with subjects who are not white men.
There’s a tiny green patch of Mojave Desert, past Barstow but before Needles, north of Joshua Tree National Park and south of the Mojave National Preserve, where groundwater pumped from an aquifer under the arid landscape irrigates several hundred acres of crops. Rainfall that seeps from the adjacent mountains is sporadic, but sufficient to replenish what is taken from the ground while still leaving enough for the natural springs that sustain the bighorn sheep, desert tortoises and other threatened species that live in the environmentally fragile region. But the private landowner, Cadiz Inc., is interested in more than growing a few lemons among the creosote and cactus.
Dig out that umbrella, and even the tire chains. It’s mid-May, but a series of rare, winter-like storms will soak the Bay Area and much of California through next week and bring up to 2 feet of new snow to the Sierra Nevada. Two atmospheric rivers are moving in from the Pacific, forecasters say. And although they are weak — expected to be a 1 on a scale of 1 to 5 — they will generate steady rainfall starting Wednesday and continuing through next Tuesday.
The California Department of Water Resources released a Lake Oroville community update on Monday afternoon amid rumors of ongoing safety concerns regarding the Oroville Dam’s main spillway. These rumors have been circulated mostly on Facebook, according to DWR Public Information Officer Elizabeth Whitmore. “At this time, the community update should answer all questions regarding any safety issues with the main spillway, as well as concerns growing over the upcoming rain storm,” Whitmore said.
