SOURCE WATER ASSESSMENT SUMMARY BROCHURE

Transcription

1 SOURCE WATER ASSESSMENT SUMMARY BROCHURE STAYTON WATER SUPPLY PWS # WHAT IS A SOURCE WATER ASSESSMENT? The Source Water Assessment was recently completed by the Department of Environmental Quality (DEQ) and the Oregon Health Division (OHD) to identify the surface areas (and/or subsurface areas) that supply water to Stayton Water Supply s public water system intake and to inventory the potential contaminant sources that may impact the water supply. WHY WAS IT COMPLETED? The Source Water Assessment was completed to provide information so that Stayton Water Supply s public water system staff/operator, consumers, and community citizens can begin developing strategies to protect the source of their drinking water, and to minimize future public expenditures for drinking water treatment. The assessment was prepared under the requirements and guidelines of the Federal Safe Drinking Water Act (SDWA). WHAT AREAS ARE INCLUDED IN STAYTON WATER SUPPLY S DRINKING WATER PROTECTION AREA? The drinking water for Stayton Water Supply is supplied by an intake on the North Santiam River. This public water system serves approximately 5,630 citizens. The intake is located in the Lower North Santiam River Watershed in the North Santiam Sub-Basin of the Willamette Basin. The drinking water intake for the Salem Public Works, Lyons Mehama Water District, Mill City Water Department, City of Gates, and Detroit Water System public water systems are also located on the North Santiam River upstream of Stayton s intake. This source water assessment addresses the geographic area providing water to Stayton s intake (Stayton s portion of the drinking water protection area) between Stayton s intake and the upstream intake for Salem Public Works. Information on Stayton s protection area upstream of the Salem Public Works intake (including the areas upstream of the Lyons Mehama, Mill City, Gates, and Detroit intakes) is summarized in the Source Water Assessment report. In addition, the City of Jefferson drinking water intake is located on the North Santiam River downstream of Stayton s intake. Activities and impacts in the Stayton drinking water protection area have the potential to also impact downstream users. A schematic of the water system protection areas within the North Santiam Sub-basin is provided in the figure attached to this summary. The geographic area providing water to Stayton s intake (Stayton s portion of the drinking water protection area) extends upstream approximately 19.6 miles in an easterly direction and encompasses a total area of 7.1 square miles. The protection area within an 8-hour travel time from the intake extends approximately 14 miles upstream of the intake. Valentine Creek and its tributaries are included in this area. The boundaries of the Drinking Water Protection Area are illustrated on the figure attached to this summary. WHAT ARE THE POTENTIAL SOURCES OF CONTAMINATION TO STAYTON WATER SUPPLY S PUBLIC DRINKING WATER SUPPLY? The primary intent of this inventory was to identify and locate significant potential sources of contaminants of concern. The delineated drinking water protection area is primarily dominated by residential and agricultural land uses. The potential contaminant sources identified in the watershed include grazing animals, non-irrigated crops, irrigated crops, clear-cuts, high-density housing, rural homesteads, sewer lines, a water treatment plant, a park, gas stations, auto repair shops, auto body shops, an environmental clean-up site, a substation, a newspaper company, shopping mall, schools, hospital, residence with scrap yard, an oil company, a state highway, and transmission lines. This provides a quick look at the existing potential sources of contamination that could, if improperly managed or released, impact the water quality in the watershed.

2 WHAT ARE THE RISKS FOR OUR SYSTEM? A total of twenty-five potential contaminant sources were identified in Stayton Water Supply s drinking water protection area. Twenty-two of these are located in the sensitive areas and twenty-one are high- to moderate-risk sources within sensitive areas. The sensitive areas within the Stayton Water Supply drinking water protection area include areas with high soil permeability, high soil erosion potential, high runoff potential and areas within 1000 from the river/streams. The sensitive areas are those where the potential contamination sources, if present, have a greater potential to impact the water supply. The information in this assessment provides a basis for prioritizing areas in and around our community that are most vulnerable to potential impacts and can be used by the Stayton Water Supply community to develop a voluntary Drinking Water Protection Plan. NEED MORE INFORMATION? Stayton Water Supply s Source Water Assessment Report provides additional details on the methodology and results of this assessment. The full report is available for review at: Contact the Stayton Water Supply staff if you would like additional information on these Source Water Assessment results.

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4 1 Housing - High High Density North of intake Stayton Field- Within Moderate Improper use, storage, and disposal of Density (> 1 Housing Observation sensitive household chemicals may impact the House/0.5 acres) drinking water supply. Stormwater run-off or infiltration may carry contaminants to drinking water supply. 2 Sewer Lines - Close Sewer Lines North/northeast of intake Stayton Field- Within Moderate If not properly designed, installed, and Proximity to PWS Observation sensitive maintained, sewer lines can impact drinking Interview water, especially adjacent to a waterbody or within the 2-year time-of-travel zone for drinking water wells. 3 Homesteads - Rural Rural Homestead Throughout DWPA Stayton Field- Within Lower If not properly sited, designed, installed, - Septic Systems Observation sensitive and maintained, septic systems can (< 1/acre) impact drinking water. Use of drain cleaners and dumping household hazardous wastes can result in groundwater Wells/Abandoned Wells Moderate Improperly installed or maintained wells and abandoned wells may provide a direct conduit for contamination to groundwater and drinking water source. 4 Drinking Water Salem Water East of intake Stayton Database (2) Within Moderate Treatment chemicals and equipment Treatment Plants Treatment Plant Field- sensitive maintenance materials may impact Observation groundwater or surface water source. Construction is currently being Interview done on the site. 5 Other - Paris Woolen Mill North of intake Stayton Database (2) Within Higher The impacts of this potential contaminant Environmental Field- sensitive source will be addressed during the Clean-Up Site Observation enhanced inventory. Contact indicated great concern Interview that the abandoned building may be a fire hazard. Building sits right along the Stayton ditch approximately 50 yards upstream from intake. 3/10/2003 Page 1 of 7

5 6 Automobiles - Gas Cascade Pro Auto North of intake Stayton Field- Within Moderate Spills, leaks, or improper handling of fuels Stations Observation sensitive and other materials during transportation, transfer, and storage may impact the drinking water supply. There are several auto repair shops located within the DWPA. 7 Automobiles - Body Johnson Auto North of intake Stayton Database (2) Within Moderate Improper management of vehicle paints, Shops Body and Paint Field- sensitive thinners, and primer products may impact Observation the drinking water supply. Kustom Klassics auto body shop located off 1st Ave also falls within the DWPA. 8 Automobiles - NAPA Auto North of intake Stayton Database (2) Within Moderate Spills, leaks, or improper handling of Repair Shops Suppy/Repair Field- sensitive automotive fluids, solvents, and repair Observation materials during transportation, use, May also be known as Stayton Auto Supply. storage and disposal may impact the drinking water supply. Above Ground Moderate Spills, leaks, or improper handling of stored Storage Tanks - materials may impact the drinking water Excluding Water supply. May also be known as Stayton Auto Supply. 9 Automobiles - Steves Auto North of intake. Stayton Field- Within Moderate Spills, leaks, or improper handling of Repair Shops Observation sensitive automotive fluids, solvents, and repair materials during transportation, use, storage and disposal may impact the drinking water supply. Shop is approximately 20 yards north of the intake 10 Photo Stayton Mail North of intake Stayton Database (2) Within Higher Spills, leaks, or improper handling of Processing/Printing Newspaper Field- sensitive photographic chemicals during Observation transportation, use, storage and disposal may impact the drinking water supply. 11 Parking Lots/Malls Statyon Plaza North of intake Stayton Field- Within Higher Spills and leaks of automotive fluids in (> 50 Spaces) Observation sensitive parking lots may impact the drinking water supply. 3/10/2003 Page 2 of 7

6 12 UST - Status Chevron Gas North of intake Stayton Database (2) Within Moderate Spills, leaks, or improper handling of stored Unknown Station Field- sensitive materials may impact the drinking water Observation supply. There are three additional gas stations located within the DWPA and include Cascade Gas, Cennex and a Texaco. Chevron gas station has 3 upgraded UST and 1 non- USTs are reported as upgraded - PWS should verify all USTs were upgraded. UST - Lower Spills or improper handling during tank Upgraded/Registere filling or product distribution may impact d - Active the drinking water supply. There are three additional gas stations located within the DWPA and include Cascade Gas, Cennex and a Texaco. Chevron gas station has 3 upgraded UST and 1 non- USTs are reported as upgraded - PWS should verify all USTs were upgraded. Automobiles - Gas Stations Moderate Spills, leaks, or improper handling of fuels and other materials during transportation, transfer, and storage may impact the drinking water supply. There are three additional gas stations located within the DWPA and include Cascade Gas, Cennex and a Texaco. Chevron gas station has 3 upgraded UST and 1 non- USTs are reported as upgraded - PWS should verify all USTs were upgraded. 3/10/2003 Page 3 of 7

7 13 Schools St. Marys North of intake Stayton Database (2) Within Moderate Over-application or improper handling of School/Rectory Field- sensitive cleaning products, pesticides or fertilizers Observation used on the school grounds may impact drinking water. Vehicle maintenance wastes may contribute contaminants. 14 Parks Stayton Park East of intake. Stayton Field- Within Moderate Over-application or improper handling of Observation sensitive pesticides/fertilizers may impact drinking water. Excessive irrigation may cause transport of contaminants through runoff. Heavy use along edge of waterbody may contribute to erosion, causing turbidity. Small car wash. 15 Medical/Vet Offices Santiam Memorial Northeast of intake Stayton Database (2) Outside Lower Spills, leaks, or improper handling of x-ray, Hospital Field- sensitive biological, chemical, and radioactive Observation areas. wastes and other materials during transportation, use, storage and disposal may impact the drinking water supply. 16 Grazing Animals (> Grazing Animals Northeast of intake Stayton Field- Within Higher Improper storage and management of 5 large animals or Observation sensitive animal wastes may impact drinking water equivalent/acre) supply. Concentrated livestock may contribute to erosion and sedimentation of surface water bodies. 17 Crops - Nonirrigated Non-irrigated Throughout DWPA Stayton Field- Within Lower Over-application or improper handling of (inc. Christmas Observation sensitive pesticides/fertilizers may impact drinking trees, grains, grass water. Some agricultural practices may seed, pasture) result in excess sediments discharging to surface waters, but non-irrigated crops are generally considered to be a low risk. 3/10/2003 Page 4 of 7

8 18 Crops - Irrigated Irrigated Crops Northeast of intake Stayton Field- Within Higher Over-application or improper handling of (inc. orchards, Observation sensitive pesticides/fertilizers may impact drinking vineyards, water. Excessive irrigation may transport nurseries, contaminants or sediments to groundwater/surface water through runoff. Drip-irrigated crops are considered to be a low risk. 19 Junk/Scrap/Salvage Salvage Yard Northeast of intake. Off Stayton Field- Within Higher Spills, leaks, or improper handling of Yards E.Jefferson St Observation sensitive automotive chemicals, batteries, and other Interview waste materials during storage and Located at a residence. disposal may impact the drinking water Location based on map and/or aerial photograph provided by PWS. Observed some vehicles on site. Did not have access to area. PWS may want to verify 3/10/2003 Page 5 of 7

9 20 Chemical/Petroleum Hance Oil Northeast of intake. Off Stayton Database (2) Within Higher Spills, leaks, or improper handling of Processing/Storage E.Jefferson St Field- sensitive chemicals and other materials during Observation transportation, use, storage and disposal Did not observe a large facility. Site may be a car repair shop, may impact the drinking water supply. needs verified and new risk assessed. UST - Status Moderate Spills, leaks, or improper handling of stored Unknown materials may impact the drinking water supply. PCS location based on regulatory database search - needs verification. Unknown operations - needs verification. Did not observe a large facility. Site may be a car repair shop, needs verified and new risk assessed. PCS location based on regulatory database search - needs verification. Unknown operations - needs verification. 21 Other -Future Land Future Housing East of intake. Stayton Interview Within Moderate The impacts to this potential contaminant Development Development sensitive source will be addressed during the enhanced inventory. Contact indicated that there are plans for a large housing development along North Santiam. Development will likely be on large capacity septic system. 3/10/2003 Page 6 of 7

10 22 Managed Forest Clear Cut Throughout DWPA Stayton Field- Outside Higher Cutting and yarding of trees may Land - Clearcut Observation sensitive contribute to increased erosion, resulting in Harvest (< 35 yrs.) areas. turbidity and chemical changes in drinking water supply. Over-application or improper handling of pesticides or fertilizers may impact drinking water source. 23 Transmission Lines Transmission Lines Northeast of intake Stayton Field- Within Higher Construction and corridor maintenance - Right-of-Ways Observation sensitive may contribute to increased erosion and turbidity in drinking water supply. Overapplication or improper handling of pesticides or fertilizers may impact 24 Transportation - State Highway 22 Northeast of intake Stayton Field- Within Moderate Vehicle use increases the risk for leaks or Risk reduced to Moderate Freeways/State Observation sensitive spills of fuel & other haz. materials. Road because only a small portion of Highways/Other building, maintenance & use can increase Hwy 22 falls within DWPA. Heavy Use Roads erosion/slope failure causing turbidity. Over-application or improper handling of pesticides/fertilizers may impact water. 25 Utility Stations - BPA Santiam Northeast of intake. Off Stayton Database (2) Just outside Moderate Spills, leaks, or improper handling of Risk reduced to Moderate Maintenance Substation Substation Rd Field- DWPA chemicals and other materials including because substation falls just Transformer Observation PCBs during transportation, use, storage outside DWPA. and disposal may impact the drinking water Substation is very large and is located at the crest of a hill. PWS may want to verify that drainage from substation will not be directed into the DWPA due to its location. Also very small substation found next to Steves Auto Repair. 3/10/2003 Page 7 of 7