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Home My WebLink About19, Water Quality Regulations Workshop WORKSHOP ITEM #19 and RadonCopper, with Lead, Quality Regulations Associated Water and RadonCopper, with Lead, Quality Regulations Associated Water 2016May 4, Water Quality Regulations Associated with Lead, Copper and Radon 22 of the California Code of Regulations.DWP), in accordance with the Federal EPA and Title -Program (SWRCBDrinking Water -California State Water Resources Control BoardDistrict Staff maintains water quality monitoring plans with the •demandsThe District pumps from 12 groundwater wells to meet daily and peak •HirschdaleTruckee and the community of approximately 13,000 service connections throughout the Town of The Truckee Donner Public Utility District delivers drinking water to •BACKGROUND / HISTORY Water Quality Regulations Associated with Lead, Copper and Radon BACKGROUND/HISTORY Alpha Particle and Radionuclide-DWP Gross-SWRCB•EPA Lead and Copper Monitoring Rule (LCMR)•requirements for lead, copper and radonIncluded in the District’s water quality plan are the sampling •Water Quality Regulations Associated with Lead, Copper and RadonWater Quality Regulations Associated with Lead, Copper and Radon NEW INFORMATION) is .015mg/L, and for copper (Cu) 1.3mg/LPbThe current MCL for lead (•and kidney damage and complications of Wilson’s diseaseCopper has been known to cause stomach and intestinal distress, liver •the kidneyLead has been known to cause damage to the brain, red blood cells and •copper (Cu)) and PbEstablished by the EPA in 1991 to reduce exposure risks to lead (•Lead and Copper Monitoring Rule (LCMR)•Water Quality Regulations Associated with Lead, Copper and RadonWater Quality Regulations Associated with Lead, Copper and Radon NEW INFORMATION corrosive properties of water, if not properly managedLeaching of lead and copper from plumbing is enhanced by the •based solderResidential plumbing and fixtures containing brass, copper or lead •Lead service lateral pipe materials•Well and pump infrastructure construction materials•Typical sources of lead and copper in drinking water:•Water Quality Regulations Associated with Lead, Copper and RadonWater Quality Regulations Associated with Lead, Copper and Radon NEW INFORMATION detect-collected samples indicated “nonSystem was 2015 when all 5 HirschdaleLast sampling interval for the •detect”-when all 30 collected samples indicated “nonMain System was in 2013, -Last sampling interval for the Truckee•size)to every three years (number of samples collected based on system The LCMR initial sampling interval is every six months, then reduced •water systemThe TDPUD water distribution system does not contribute lead to the •Water Quality Regulations Associated with Lead, Copper and RadonWater Quality Regulations Associated with Lead, Copper and Radon NEW INFORMATION(COC) to be monitored by public water systemsThe State of California has established a list of Constituents of Concern •DWP-California Department of Public Health (CDPH) and SWRCBThe EPA rule is supplemented by MCLs previously established by the •occurring radionuclides in drinking waterEstablished by the EPA in 2000 to reduce exposure to naturally •Radionuclide Monitoring Rule•Water Quality Regulations Associated with Lead, Copper and RadonWater Quality Regulations Associated with Lead, Copper and Radon NEW INFORMATION kidney effects and increased risk of cancerHealth risks associated with exposure to radionuclides include toxic •222-226, and radon-238, radium-including uraniumAlpha particles are a type of radiation emitted by some radionuclides •alpha particles-tritium, strontium, and grossState of California Constituents of Concern include: uranium, radon, •Key points regarding radiological compliance with potable water:•Water Quality Regulations Associated with Lead, Copper and RadonWater Quality Regulations Associated with Lead, Copper and Radon NEW INFORMATION standardsalpha water quality reporting -detect” for all radium and gross-“nonAll TDPUD groundwater sources have tested well below the DRL and are •1pCi/L in airA radon concentration of 10,000pCi/L in water converts to approximately •atmosphereRadon occurs naturally in groundwater and easily transfers to the •Radon is a naturally occurring gas, and is a product of uranium decay•(Continued)Water Quality Regulations Associated with Lead, Copper and RadonWater Quality Regulations Associated with Lead, Copper and Radon NEW INFORMATION/LpCi560 -0100pCi/L4,000pCi/L*RadonDetect)-(Non/L pCi0.0 1pCi/L5pCi/L(combined)226/228-Radium/LpCi3.4 -0.01pCi/L15pCi/LAlpha Particle-GrossRangeTDPUD Source WaterDLRMCLContaminant Radionuclide Monitoring Rule•Water Quality Regulations Associated with Lead, Copper and RadonWater Quality Regulations Associated with Lead, Copper and Radon FISCAL IMPACT Board approved FY16/17 Water Operations BudgetLead and Copper Rule and the Radionuclide Rule are included in the Funding for water quality compliance testing in accordance with the •This Workshop has no direct fiscal impact•Water Quality Regulations Associated with Lead, Copper and RadonWater Quality Regulations Associated with Lead, Copper and Radon RECOMMENDATION Receive this report and provide feedback to Staff•Water Quality Regulations Associated with Lead, Copper and RadonWater Quality Regulations Associated with Lead, Copper and Radon Water Quality Regulations Associated with Lead, Copper and Radon increasing the risk of cancer in the liver, bladder, kidney, lung and skinArsenic is a known human carcinogen, with ingestion reportedly •\[As(III)\]arseniteIn ground water formations, arsenic is typically found in the form of •products-Other sources can include mining, agricultural and industrial bi•and volcanic rock depositsmetal element occurring naturally in volcanic glass -Arsenic is a semi•Arsenic (As)•BACKGROUND / HISTORY Water Quality Regulations Associated with Lead, Copper and Radon Water Quality Regulations Associated with Lead, Copper and Radon g/L μ30.0-0.0Detectable concentrations of arsenic in local groundwater range from •levels above the DLRof the 12 groundwater wells in the TDPUD have detectable arsenic 7•g/L μand a PHG of .004g/L μ, with the DLR of 2g/L μg/L to 10μ50In November 2008, the California MCL for arsenic was reduced from •(Continued)BACKGROUND / HISTORY Water Quality Regulations Associated with Lead, Copper and Radon Water Quality Regulations Associated with Lead, Copper and Radon media system to remove arsenic contamination Well is equipped with a granular ferric hydroxide filter Hirschdale•plan to significantly reduce residual arsenic concentrations Drive Well is operated under a State approved blending Glenshire•concentrations limited water production plan to significantly reduce residual arsenic Northside Well is operated under a State approved blending and •DWP-accordance with the operating permit approved by the SWRCB3 of the District’s wells require remediation or treatment technologies in •(Continued)BACKGROUND / HISTORY Water Quality Regulations Associated with Lead, Copper and Radon Water Quality Regulations Associated with Lead, Copper and Radon g/L)μMCL ( 10concentrations exceeding the California have arsenic water wells in the State of 1,000 of the 7,800 active drinking As of November 2015, more than •BACKGROUND / HISTORY Water Quality Regulations Associated with Lead, Copper and Radon