Category Archives: Water Storage

California Snow is Melting: Save Our Precious Water!

“Oroville Dam’s spillway was forced to reopen at maximum flow as over 50,000 cubic feet per second of water careened into the lake and weather scientists warned of an impending 7 to 10-day heatwave that could cause flooding from an accelerated snowmelt.” click here

Anderson Dam (California) is Seismically Unstable

“The water district that manages Silicon Valley’s 235-foot-high earthen Anderson Dam, which holds 29 billion gallons of water, has acknowledged that the dam’s embankments are seismically unstable and could catastrophically liquefy in a major earthquake.” click here

Bacterial Diversity During Reservoir Thermal Stratification

Zhang HH, Chen SN, Huang TL, Ma WX, Xu JL, Sun X. Vertical Distribution of Bacterial Community Diversity and Water Quality during the Reservoir Thermal Stratification. International Journal of Environmental Research and Public Health. 2015 Jun 17;12(6):6933-45. doi: 10.3390/ijerph120606933.

Reservoir thermal stratification drives the water temperature and dissolved oxygen gradient, however, the characteristic of vertical water microbial community during thermal stratification is so far poorly understood. In this work, water bacterial community diversity was determined using the Illumina Miseq sequencing technique. The results showed that epilimnion, metalimnion and hypolimnion were formed steadily in the JINPEN drinking water reservoir. Water temperature decreased steadily from the surface (23.11 °C) to the bottom (9.17 °C). Total nitrogen ranged from 1.07 to 2.06 mg/L and nitrate nitrogen ranged from 0.8 to 1.84 mg/L. The dissolved oxygen concentration decreased sharply below 50 m, and reached zero at 65 m. The Miseq sequencing revealed a total of 4127 operational taxonomic units (OTUs) with 97% similarity, which were affiliated with 15 phyla including Acidobacteria, Actinobacteria, Armatimonadetes, Bacteroidetes, Caldiserica, Chlamydiae, Chlorobi, Chloroflexi, Cyanobacteria, Firmicutes, Gemmatimonadetes, Nitrospirae, Planctomycetes, Proteobacteria, and Verrucomicrobia. The highest Shannon diversity was 4.41 in 45 m, and the highest Chao 1 diversity was 506 in 5 m. Rhodobacter dominated in 55 m (23.24%) and 65 m (12.58%). Prosthecobacter dominated from 0.5 to 50 m. The heat map profile and redundancy analysis (RDA) indicated significant difference in vertical water bacterial community composition in the reservoir. Meanwhile, water quality properties including dissolved oxygen, conductivity, nitrate nitrogen and total nitrogen have a dramatic influence on vertical distribution of bacterial communities.

USEPA to Regulate Finished Water Storage Facility Inspection

EPA/WATER RIN: 2040-AF37 Publication ID: Fall 2014
Title: National Primary Drinking Water Regulations: Finished Water Storage Facility Inspection Requirements Addendum to the Revised Total Coliform Rule
Abstract: EPA is planning to propose an addendum to the Revised Total Coliform Rule (RTCR) to strengthen public health protection by including finished water storage facility inspection (SFI) requirements. In the preamble to the July 2010 proposed RTCR (75 FR 40926), EPA requested comment on the value and cost of storage facility inspection and cleaning. EPA received comments regarding unsanitary conditions and contamination that can be found in finished water storage facilities that are not routinely inspected and cleaned, including breaches and accumulation of sediment, animals, insects, and other contaminants. The Agency is developing an SFI proposal in order to allow interested parties to again comment and provide any additional relevant information. EPA is planning to propose and request comment on requirements for public water systems to periodically inspect the interior and exterior of their finished water storage facilities at least and to correct any sanitary defects found. Any potential requirements would apply to all public water systems that have one or more finished water storage facilities. Like the 2013 final RTCR, the proposed storage tank inspection requirements would maintain or improve public health protection by reducing cases of illnesses, and possibly deaths, due to exposure to waterborne pathogens.
Agency: Environmental Protection Agency(EPA) Priority: Other Significant
RIN Status: Previously published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage
Major: No Unfunded Mandates: No
CFR Citation: 40 CFR 141; 142 (To search for a specific CFR, visit the Code of Federal Regulations.)
Legal Authority: 42 USC 300f et seq
Legal Deadline:

Action Source Description Date
None
Timetable:

Action Date FR Cite
NPRM 06/00/2015
Additional Information: Docket #:EPA-HQ-OW-2008-0878. Split from RIN 2040-AD94.
Regulatory Flexibility Analysis Required: No Government Levels Affected: Federal, State, Tribal
Small Entities Affected: No Federalism: No
Included in the Regulatory Plan: No
RIN Information URL:http://water.epa.gov/lawsregs/rulesregs/sdwa/tcr/regulation_revisions.cfm
RIN Data Printed in the FR: No
Related RINs: Related to 2040-AD75
Agency Contact:
Sean Conley
Environmental Protection Agency
Water
4607M,
Washington, DC 20460
Phone:202 564-1781
Fax:202 564-3767
Email: conley.sean@epa.gov

Julie Javier
Environmental Protection Agency
Water
Mail Code 4607M, 1200 Pennsylvania Ave NW,
Washington, DC 20460
Phone:202 564-2335
Email: javier.julie@epa.gov