SOURCE WATER ASSESSMENT SUMMARY BROCHURE

Transcription

1 SOURCE WATER ASSESSENT SUARY BROCURE OREGON CITY - SOUT FORK WATER BOARD, PWS #40059 NORT CACKAAS COUNTY WATER COISSION, PWS # AND CACKAAS RIVER WATER, PWS #40087 WAT IS A SOURCE WATER ASSESSENT? The Source Water Assessment was recently completed by the Department of Environmental Quality (DEQ) and the Oregon Department of uman Services (DS) identify the surface areas (and/or subsurface areas) that supply water Oregon City - South Fork Water Board (OC- SFWB), North Clackamas County Water Commission (NCCWC), and Clackamas River Water s (CRW) public water system intakes and invenry the potential contaminant sources that may impact the drinking water supplies. WY WAS IT COPETED? The Source Water Assessment was completed provide information so that the OC-SFWB, NCCWC, and CRW public water system staff/operar, consumers, and community citizens can begin developing strategies protect the source of their drinking water, and 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). WAT AREAS ARE INCUDED IN OC-SFWB, NCCWC, AND CRW S DRINKING WATER PROTECTION AREA? The drinking water for OC-SFWB, NCCWC, and CRW is supplied by three individual intakes on the Clackamas River. These three public water suppliers teamed with DEQ and DS complete this Source Water Assessment for the Clackamas River watershed upstream of the intakes. Combined, the three public water systems serve approximately 90,000 citizens. In addition the intakes for OC-SFWB, NCCWC, and CRW, there are intakes for three other water providers in the Clackamas River watershed; a schematic diagram of the Clackamas Sub-basin Drinking Water Protection Areas is attached. This assessment addresses the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes (SFWB, NCCWC, and CRW s portion of the drinking water protection area) between the OC-SFWB intake and the upstream intake for Estacada. The boundaries of the Drinking Water Protection Area are illustrated on the figure attached this summary. Information on the protection area upstream of the Estacada intake is summarized in SFWB, NCCWC, and CRW s assessment. Activities and impacts in the SFWB, NCCWC, and CRW protection area have the potential also impact the downstream water users (ake Oswego unicipal Water will be provided a copy of this assessment). The OC-SFWB, NCCWC, and CRW intakes are located in the ower Clackamas River Watershed in the Clackamas Sub-Basin of the Willamette Basin. The geographic area providing water the intakes (the drinking water protection area) extends upstream from the OC-SFWB intake approximately 335 miles (approximately,30 miles including area upstream of the Estacada intake) in a southeasterly direction and encompasses a tal area of 264 square miles (939 tal square miles including the area upstream of the Estacada intake). Included in this area are a number of tributaries the Clackamas River including Rock, Richardson, Clear, Eagle, Deep, Foster, and Goose Creeks and their tributaries. The protection area within an 8-hour travel time from the intake extends approximately 4.3 miles upstream of the OC-SFWB intake. It is recommended that the water systems and community consider increased protection within an 8-hour travel time from the intake since eight hours should provide adequate response time protect the integrity of the public water system intake should a spill or release occur at any crossing or discharge point the stream.

2 WAT ARE TE POTENTIA SOURCES OF CONTAINATION TO OC-SFWB, NCCWC, AND CRW S PUBIC DRINKING WATER SUPPY? The primary intent of this invenry was identify and locate significant potential sources of contaminants of concern. The delineated drinking water protection area is occupied by residential/municipal, agricultural/forest, and commercial/industrial land uses. Potential contaminant sources identified in the watershed that relate agricultural/forest management include irrigated and non-irrigated crop areas, managed forest lands, animal grazing areas, boarding stables, confined animal feeding operations, farm machinery repair shops, and chemical mixing/srage/handling areas. Potential contaminant sources related commercial and industrial land uses include parking lots/malls, fleet/trucking terminals, gas stations, body/repair shops, chemical processing/srage facilities, food processing facilities, junk/scrap/salvage yards, machine shops, metal plating/finishing/fabrication shops, wood/pulp/paper processing facilities, and other manufacturing land uses. The potential contaminant sources identified in the watershed that relate residential/ municipalities include high density housing areas, a landfill, rural homesteads with septic systems, campgrounds, parks, golf courses, waste transfer/recycling stations, utility stations, and wastewater treatment plants. In addition, several major transportation corridors and bridges, srm water retention basins/outfalls, channel alteration areas, transmission line right-of-ways, and substations were located with the drinking water protection area. 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. WAT ARE TE RISKS FOR OUR SYSTE? A tal of,27 potential contaminant sources were identified in OC-SFWB, NCCWC, and CRW s drinking water protection area. An additional 5 potential sources of contamination were identified upstream of the Estacada intake. Of the sources identified in the OC-SFWB, NCCWC, and CRW s portion of the protection area, 533 are located in the sensitive areas and 445 are high- moderate-risk sources within sensitive areas. There are an additional 99 sites where the location and sensitivity was not identified during the invenry. The sensitive areas within the OC-SFWB, NCCWC, and CRW drinking water protection area include areas with high soil permeability, high soil erosion potential, high runoff potential and areas within 000 feet from the river/streams. The sensitive areas are those where the potential contamination sources, if present, have a greater potential impact the water supply. The information in this assessment provides a basis for prioritizing areas in and around our community that are most vulnerable potential impacts and can be used by the OC- SFWB, NCCWC, and CRW community develop a voluntary Drinking Water Protection Plan or incorporate drinking water protection strategies in your existing watershed work. NEED ORE INFORATION? OC-SFWB, NCCWC, and CRW 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 your public water system staff if you would like additional information on OC-SFWB, NCCWC, and CRW s Source Water Assessment results.

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7 TABE. SUARY OF POTENTIA CONTAINANT SOURCES BY AND USE PWS # OREGON CITY SOUT FORK WATER BOARD PWS # NORT CACKAAS COUNTY WATER COISSION, and PWS # CACKAAS RIVER WATER - CACKAAS Residential/unicipal and Uses Total in Total in Relative ower Full Potential Contamination Source Note Risk evel DWPA (3) DWPA (4) Airport - aintenance/fueling Area oderate 4 4 Apartments and Condominiums ower 6 7 Campgrounds/RV Parks () oderate 5 8 Cemeteries - Pre-945 ower 7 7 Drinking Water Treatment Plants oderate 5 7 Fire Station ower 8 8 Fire Training Facilities oderate Golf Courses oderate 6 6 ousing - igh Density (> ouse/0.5 acres) oderate andfill/dumps () igher awn Care - ighly aintained Areas oderate or Pools oderate 2 Parks oderate 7 8 Railroad Yards/aintenance/Fueling Areas igher 7 7 Schools oderate 4 5 Septic Systems - igh Density ( > system/acre) () oderate 3 3 Sewer ines - Close Proximity PWS () oderate 2 Utility Stations - aintenance Transformer Srage igher 7 9 Waste Transfer/Recycling Stations () igher 6 6 Wastewater Treatment Plants/Collection Stations () igher 4 8 Other: and Disturbance - Recent ogging oderate Other: Water or Wastewater Pump Station oderate Other: Future Residential and Use oderate 0 NOTES: Sites and areas identified in this Table are only potential sources of contamination the drinking water. Environmental contamination is not likely occur when contaminants are used and managed properly. () - Potential source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation (3) - ower DWPA summarizes the tal number of potential contaminant sources (PCSs) identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes between the OC-SFWB intake and the upstream intake for Estacada. (4) - Full DWPA summarizes all PCSs identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes (including the PCSs identified in areas upstream of the Estacada intake and USFS Timberlake JCC s intakes). 2/8/2002 Page of 7

8 TABE. SUARY OF POTENTIA CONTAINANT SOURCES BY AND USE PWS # OREGON CITY SOUT FORK WATER BOARD PWS # NORT CACKAAS COUNTY WATER COISSION, and PWS # CACKAAS RIVER WATER - CACKAAS Commercial/Industrial and Uses Total in Total in Relative ower Full Potential Contamination Source Note Risk evel DWPA (3) DWPA (4) Aumobiles - Body Shops oderate 5 5 Aumobiles - Car Washes Aumobiles - Gas Stations oderate oderate 7 7 Aumobiles - Repair Shops oderate 46 Boat Services/Repair/Refinishing igher Chemical/Petroleum Processing/Srage igher Dry Cleaners oderate Electrical/Electronic anufacturing igher 0 0 Cement/Concrete Plants oderate 8 Fleet/Trucking/Bus Terminals oderate Food Processing oderate 6 6 Furniture/umber/Parts Sres oderate 4 5 ome anufacturing igher 3 3 Junk/Scrap/Salvage Yards igher achine Shops igher edical/vet Offices () ower 8 8 etal Plating/Finishing/Fabrication igher ines/gravel Pits igher 0 0 Office Buildings/Complexes ower Parking ots/alls (> 50 Spaces) igher Pho Processing/Printing Plastics/Synthetics Producer igher igher 4 Research aboraries RV/ini Srage igher ower Wood Preserving/Treating igher 2 Wood/Pulp/Paper Processing and ills igher Other: oderate 2 Other: Beverage Services ower Other: Cabinet akers oderate 3 Other: Cast olding igher Other: Ceramics anufacturing Other: Commercial & Industrial Coatings igher oderate Other: Cabinet anufacturing oderate 3 Other: Commercial Industrial Coatings oderate 2 Other: Concrete Cutting oderate 2 NOTES: Other: Construction Company oderate 2 2 Sites and areas identified in this Table are only potential sources of contamination the drinking water. Environmental contamination is not likely occur when contaminants are used and managed properly. () - Potential source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation (3) - ower DWPA summarizes the tal number of potential contaminant sources (PCSs) identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes between the OC-SFWB intake and the upstream intake for Estacada. (4) - Full DWPA summarizes all PCSs identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes (including the PCSs identified in areas upstream of the Estacada intake and USFS Timberlake JCC s intakes). 2/8/2002 Page 2 of 7

9 TABE. SUARY OF POTENTIA CONTAINANT SOURCES BY AND USE PWS # OREGON CITY SOUT FORK WATER BOARD PWS # NORT CACKAAS COUNTY WATER COISSION, and PWS # CACKAAS RIVER WATER - CACKAAS Commercial/Industrial and Uses (cont.) Total in Total in Relative ower Full Note (3) DWPA (4) Potential Contamination Source Other: Equipment Rental Risk evel oderate DWPA Other: Future Urban Area - igh Density Other: Glazing Contracrs oderate oderate Other: Gun Club oderate Other: Gun Shop ower Other: ivesck Vitamins oderate Other: edical Equipment anufacturing igher 3 3 Other: iscellaneous aintenance Shop oderate Other: azardous Chemicals Srage & Transfer igher Other: iscellaneous anufacturing ower Other: iscellaneous anufacturing oderate 7 7 Other: iscellaneous Vehicle Repair & Service igher Other: iscellaneous Vehicle Repair and Service oderate 3 3 Other: old & Die igher Other: old and Die igher Other: Optical Plastics oderate Other: Paint Shop oderate Other: Parts Distribur for eavy Equipment oderate Other: Paving Company oderate Other: Restaurant & Tavern - parking lot packed gravel igher Other: Retail Feed & Pet Supply Other: Rural arket ower oderate Other: Secondary Wood Products Industry Other: Shooting Range oderate oderate 2 2 Other: Shopping Cart Repair oderate Other: Street Sweeping & Stripping oderate Other: Unknown Operations - Industrial/Agricultural Processing - oderate Other: Unmanaged Fields Other: Wedding Site with Septic System and Parking ots ower oderate Other: Tanneries igher Other: Wholesaler of Exotic Bird Other: Fish Research oderate oderate Supplies Other: Unknown Business Type oderate Other: Warehouse ower NOTES: Sites and areas identified in this Table are only potential sources of contamination the drinking water. Environmental contamination is not likely occur when contaminants are used and managed properly. () - Potential source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation (3) - ower DWPA summarizes the tal number of potential contaminant sources (PCSs) identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes between the OC-SFWB intake and the upstream intake for Estacada. (4) - Full DWPA summarizes all PCSs identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes (including the PCSs identified in areas upstream of the Estacada intake and USFS Timberlake JCC s intakes). 2/8/2002 Page 3 of 7

10 TABE. SUARY OF POTENTIA CONTAINANT SOURCES BY AND USE PWS # OREGON CITY SOUT FORK WATER BOARD PWS # NORT CACKAAS COUNTY WATER COISSION, and PWS # CACKAAS RIVER WATER - CACKAAS Agricultural/Forest and Uses Total in Total in Relative ower Full Potential Contamination Source Note Risk evel DWPA (3) DWPA (4) Auction ots () igher 0 0 Boarding Stables Confined Animal Feeding Operations (CAFOs) () () igher igher Crops - Irrigated (inc. orchards, vineyards, nurseries, (2) igher 73 Crops - Nonirrigated (inc. Christmas trees, grains, grass seed, ower Grazing Animals (> 5 large animals or equivalent/acre) () igher agoons/iquid Wastes () igher 3 Farm achinery Repair oderate 33 and Application Sites () igher 4 4 anaged Forest and - Broadcast Fertilized Areas ower 0 anaged Forest and - Clearcut arvest (< 35 yrs.) igher anaged Forest and - Road Density ( > 2 mi./sq. mi.) oderate 0 0 anaged Forest and - Partial arvest (< 0 yrs.) igher 7 Pesticide/Fertilizer/Petroleum Srage, andling, ixing, & igher Recent Burn Areas (< 0 yrs.) igher anaged Forest ands - Status Unknown igher Other: oderate Other: ower 0 Other: - Unknown Agriculture Operation oderate Other: Abandoned Sck Nursey oderate Abandoned Christmas Trees 3 Other: Crops - Nonirrigated - Other: Deciduous Woodland ower ower 3 Other: Feed Sre Other: Fish atchery ower igher 2 2 Other: Fish atchery oderate Other: Former Christmas Tree Farm ower Other: anaged Forest ands 35+ yrs ower Other: eat / Game Processing Facility igher Other: Old Farm Worker ousing oderate Other: and Clearing - No Erosion Control igher Other: Pond oderate Other: Poultry Slaughter ouse igher 2 2 Other: Poultry Slaughter ouse/food Processing Facility igher NOTES: Sites and areas identified in this Table are only potential sources of contamination the drinking water. Environmental contamination is not likely occur when contaminants are used and managed properly. () - Potential source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation (3) - ower DWPA summarizes the tal number of potential contaminant sources (PCSs) identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes between the OC-SFWB intake and the upstream intake for Estacada. (4) - Full DWPA summarizes all PCSs identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes (including the PCSs identified in areas upstream of the Estacada intake and USFS Timberlake JCC s intakes). 2/8/2002 Page 4 of 7

11 TABE. SUARY OF POTENTIA CONTAINANT SOURCES BY AND USE PWS # OREGON CITY SOUT FORK WATER BOARD PWS # NORT CACKAAS COUNTY WATER COISSION, and PWS # CACKAAS RIVER WATER - CACKAAS Agricultural/Forest and Uses (cont.) Total in Total in Relative ower Full Source Note (3) DWPA (4) Potential Contamination Other: Steep Slopes Risk evel igher DWPA Other: Stream Other: Stream igher ower Other: Stream oderate 7 Other: Transitional Timber ands ower Other: Unmanaged Christmas trees ower Other: Unmanaged Deciduous Forest and ower Other: Unmanaged Deciduous Forest ands ower 7 7 Other: Unknown agricultural operation oderate Other: Unmanaged Deciduous Forest ands & Stream ower Other: Unmanaged Forest ower Other: Unmanaged Forest ands ower 9 9 Other: Wetland Area oderate Other: Wetlands ower 6 6 NOTES: Sites and areas identified in this Table are only potential sources of contamination the drinking water. Environmental contamination is not likely occur when contaminants are used and managed properly. () - Potential source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation (3) - ower DWPA summarizes the tal number of potential contaminant sources (PCSs) identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes between the OC-SFWB intake and the upstream intake for Estacada. (4) - Full DWPA summarizes all PCSs identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes (including the PCSs identified in areas upstream of the Estacada intake and USFS Timberlake JCC s intakes). 2/8/2002 Page 5 of 7

12 TABE. SUARY OF POTENTIA CONTAINANT SOURCES BY AND USE PWS # OREGON CITY SOUT FORK WATER BOARD PWS # NORT CACKAAS COUNTY WATER COISSION, and PWS # CACKAAS RIVER WATER - CACKAAS iscellaneous and Uses Total in Total in Relative ower Full Potential Contamination Source Note Risk evel DWPA (3) DWPA (4) Above Ground Srage Tanks - Excluding Water oderate 0 3 Channel Alterations - eavy igher 7 7 Combined Sewer Outfalls () ower 0 0 Srmwater Outfalls () igher 3 3 Composting Facilities () igher 2 2 isric Gas Stations igher 3 3 isric Waste Dumps/andfills () igher 0 0 omesteads - Rural - achine Shops/Equipment aintenance igher 3 3 omesteads - Rural - Septic Systems (< /acre) ()(3) ower 8 8 Injection/Dry Wells, Sumps - Class V UICs () igher 0 0 Kennels (> 20 Pens) () oderate 7 7 ilitary Installations igher Random Dump Sites igher River Recreation - eavy Use (inc. campgrounds) () oderate 0 7 Sludge Disposal Areas () igher 5 5 Srmwater Retention Basins () igher 6 6 Transmission ines - Right-of-Ways Transportation - Freeways/State ighways/other eavy Use igher igher Transportation - Railroads Transportation - Right-Of-Ways - erbicide Use Areas igher igher 7 7 Transportation - River Traffic - eavy igher 5 Transportation - Stream Crossing - Perennial igher UST - Confirmed eaking Tanks - DEQ ist oderate 2 2 UST - Decommissioned/Inactive ower 2 2 UST - Nonregulated Tanks (<,00 gals or arge eating Oil igher 0 0 UST - Not Upgraded and/or Registered Tanks oderate UST - Upgraded/Registered - Active ower UST - Status Unknown oderate 2 2 Upstream Reservoirs/Dams oderate 8 0 Wells/Abandoned Wells oderate 3 3 arge Capacity Septic Systems (serves > 20 people) - Class V () oderate Construction/Demolition Areas igher Other: igher 0 Other: 5 gallon srage containers on-site, contents unknown. oderate Other: Culvert without Fish Barrier oderate NOTES: Sites and areas identified in this Table are only potential sources of contamination the drinking water. Environmental contamination is not likely occur when contaminants are used and managed properly. () - Potential source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation (3) - ower DWPA summarizes the tal number of potential contaminant sources (PCSs) identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes between the OC-SFWB intake and the upstream intake for Estacada. (4) - Full DWPA summarizes all PCSs identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes (including the PCSs identified in areas upstream of the Estacada intake and USFS Timberlake JCC s intakes). 2/8/2002 Page 6 of 7

13 TABE. SUARY OF POTENTIA CONTAINANT SOURCES BY AND USE PWS # OREGON CITY SOUT FORK WATER BOARD PWS # NORT CACKAAS COUNTY WATER COISSION, and PWS # CACKAAS RIVER WATER - CACKAAS iscellaneous and Uses (cont.) Total in Total in Relative ower Full Note (3) DWPA (4) Potential Contamination Source Other: and Use Unknown Risk evel oderate DWPA Other: Pipeline Easement Other: Pond oderate igher 2 2 Other: Pond ower 23 Other: Pond oderate Other: Cell Phone Tower ower Other: Pond - Instream oderate Other: Culvert Srage ower Other: eliport serving t. ood NF Sites oderate 0 Other: Power Boat/watercraft fueling area over water igher 0 NOTES: Sites and areas identified in this Table are only potential sources of contamination the drinking water. Environmental contamination is not likely occur when contaminants are used and managed properly. () - Potential source of microbial contamination (2) - Drip irrigated crops, such as vineyards and some vegetables, are considered lower risk than spray irrigation (3) - ower DWPA summarizes the tal number of potential contaminant sources (PCSs) identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes between the OC-SFWB intake and the upstream intake for Estacada. (4) - Full DWPA summarizes all PCSs identified in the geographic area providing water OC-SFWB, NCCWC, and CRW s intakes (including the PCSs identified in areas upstream of the Estacada intake and USFS Timberlake JCC s intakes). 2/8/2002 Page 7 of 7

14 TABE 2. POSSIBE WATER QUAITY IPACTS FOR POTENTIA CONTAINANT SOURCES RESIDENTIA / UNICIPA AND USES DEQ PCS CODE TYPE OF ACTIVITY POTENTIA WATER QUAITY IPACTS Risk GW R0 Airport - aintenance/fueling Area Spills, leaks, or improper handling of fuels, de-icers, and other chemicals during transportation, use, srage and disposal may R02 Apartments and Condominiums Improper use, srage, and disposal of household and facility maintenance chemicals including cleaners, vehicle maintenance products, pool chemicals, pesticides and fertilizers may Srmwater run-off or infiltration may carry contaminants drinking water supply. R03 Campgrounds/RV Parks eaks or spills of aumotive fluids or improperly managed septic systems and wastewater disposal may impact drinking water supply. eavy usage along edge of waterbody may contribute erosion, causing turbidity. R04 Cemeteries - Pre-945 Embalming fluids (for example, arsenic) and decomposition by-products may impact drinking water supply. R05 Drinking Water Treatment Plants Treatment chemicals and equipment maintenance materials may impact groundwater or surface water source. R06 Fire Station Spills, leaks, or improper handling of chemicals and other materials during transportation, use, srage and disposal may R07 Fire Training Facilities Improper use of fuels and other chemicals during fire training may Risk SW R08 Golf Courses Over-application or improper handling of pesticides or fertilizers may impact drinking water. Excessive irrigation may cause transport of contaminants groundwater or surface water through runoff. R09 ousing - igh Density - > ouse/0.5 Acres Improper use, srage, and disposal of household chemicals including Cleaners, vehicle maintenance products, pool chemicals, pesticides and fertilizers may impact the drinking water supply. Srmwater run-off or infiltration may carry contaminants drinking water supply. R0 andfill/dumps Water percolating through the landfill waste material may transport contaminants groundwater or surface water supply. R awn Care - ighly aintained Areas Over-application or improper handling of pesicides or fertilizers may impact drinking water. Excessive irrigation may cause transport of contaminants groundwater or surface water through runoff. Oregon Drinking Water Protection Program Page of 9 Rev. 2/7/99

15 TABE 2. POSSIBE WATER QUAITY IPACTS FOR POTENTIA CONTAINANT SOURCES DEQ PCS CODE TYPE OF ACTIVITY POTENTIA WATER QUAITY IPACTS Risk GW R2 or Pools Spills, leaks, or improper handling of fuels and other chemicals from vehicle service and parking areas may impact the drinking water supply. Srmwater run-off or infliltration may carry contaminants drinking water. R3 Parks Over-application or improper handling of pesticides or fertilizers may impact drinking water. Excessive irrigation may cause transport of contaminants groundwater or surface water through runoff. eavy usage along edge of waterbody may contribute erosion, causing turbidity. R4 Railroad Yards/aintenance/Fueling Areas Spills, leaks, or improper handling of fuels and other chemicals during transportation, use, srage and disposal may R5 Schools Over-application or improper handling of cleaning products, pesticides or fertilizers used on the school grounds may impact drinking water. Vehicle maintenance wastes may contribute contaminants. R6 Septic Systems - igh Density - > /Acre R7 R8 If not properly sited, designed, installed, and maintained, septic systems can impact drinking water. Cumulative effects of multiple systems in an area may impact drinking water supply. Sewer ines - Close Proximity PWS If not properly designed, installed, and maintained, sewer lines can impact drinking water, especially adjacent a waterbody or within the 2-year time-of-travel zone for drinking water wells. Utility Stations - aintenance Transformer Srage Spills, leaks, or improper handling of chemicals and other materials including PCBs during transportation, use, srage and disposal may R9 Waste Transfer/Recycling Stations Improper management of water contacting waste material may R20 Wastewater Treatment Plants/Collection Stations Improper management of wastewater, treatment chemicals, or equipment maintenance materials may impact drinking water supply. R50 Others (ist) The impacts this potential contaminant source will be addressed during the enhanced invenry. Risk SW Oregon Drinking Water Protection Program Page 2 of 9 Rev. 2/7/99

16 TABE 2. POSSIBE WATER QUAITY IPACTS FOR POTENTIA CONTAINANT SOURCES COERCIA / INDUSTRIA AND USES DEQ PCS CODE TYPE OF ACTIVITY POTENTIA WATER QUAITY IPACTS Risk GW C0 Au - Body Shops Improper management of vehicle paints, thinners, and primer products may C02 Au - Car Washes Improper management of vehicle wash water may result in soaps, oils, greases, and metals impacting the drinking water supply. C03 Au - Gas Stations Spills, leaks, or improper handling of fuels and other materials during transportation, transfer, and srage may impact the drinking water supply. C04 Au - Repair Shops Spills, leaks, or improper handling of aumotive fluids, solvents, and repair materials during transportation, use, srage and disposal may C05 Boat Services/Repair/Refinishing Spills, leaks, or improper handling of fuels, septage, maintenance chemicals, sandblasting wastes, paints, and other materials during transportation, use, srage and disposal may C06 Cement/Concrete Plants Spills, leaks, or improper handling of chemicals and high turbidity wastewaters during transportation, use, srage and disposal may C07 Chemical/Petroleum Processing/Srage Spills, leaks, or improper handling of chemicals and other materials during transportation, use, srage and disposal may C08 Dry Cleaners Spills, leaks, or improper handling of dry cleaning solvents and other chemicals during transportation, use, srage and disposal may C09 Electrical/Electronic anufacturing Spills, leaks, or improper handling of chemicals and other materials during transportation, use, srage, and disposal may C0 Fleet/Trucking/Bus Terminals Spills, leaks, or improper handling of fuels, grease, solvents, and other materials from vehicle service, fueling, and parking areas may C Food Processing Spills, leaks, or improper handling of chemicals and other materials during transportation, use, srage and disposal may C2 Furniture/umber/Parts Sres Spills, leaks, or improper handling of hazardous chemical products and other materials in invenry during transportation, use, srage and disposal may impact the drinking water supply. C3 ome anufacturing (modular) Spills, leaks, or improper handling of chemicals and other materials during transportation, use, srage and disposal may Risk SW Oregon Drinking Water Protection Program Page 3 of 9 Rev. 2/7/99

17 TABE 2. POSSIBE WATER QUAITY IPACTS FOR POTENTIA CONTAINANT SOURCES DEQ PCS CODE TYPE OF ACTIVITY POTENTIA WATER QUAITY IPACTS Risk GW C4 Junk/Scrap/Salvage Yards Spills, leaks, or improper handling of aumotive chemicals, batteries, and other waste materials during srage and disposal may C5 achine Shops Spills, leaks, or improper handling of solvents, metals, and other chemicals or materials during transportation, use, srage and disposal may C6 edical/vet Offices Spills, leaks, or improper handling of x-ray, biological, chemical, and radioactive wastes and other materials during transportation, use, srage and disposal may impact the drinking water supply. C7 etal Plating/Finishing/Fabrication Spills, leaks, or improper handling of solvents and other chemicals during transportation, use, srage and disposal may C8 ines/gravel Pits Spills, leaks, or improper handling of chemicals and wastes generated in mining operations or from heavy equipment may C9 Office Buildings/Complexes Spills, leaks, or improper handling of chemicals and other materials sred and used in maintenance or from parking areas may C20 Parking ots/alls - > 50 Spaces Spills and leaks of aumotive fluids in parking lots may C2 Pho Processing/Printing Spills, leaks, or improper handling of phographic chemicals during transportation, use, srage and disposal may impact the drinking water supply. C22 Plastic/Synthetics Producer Spills, leaks, or improper handling of solvents and resins during transportation, use, srage and disposal may impact the drinking water supply. C23 Research aboraries Spills, leaks, or improper handling of laborary chemicals and wastes during transportation, use, srage and disposal may C24 RV/ini Srage Spills, leaks, or improper handling of aumotive fluids and other materials during transportation, srage and disposal may C25 Wood/Pulp/Paper Processing and ills Spills, leaks, or improper handling of chemicals and other materials during transportation, use, srage and disposal may C26 Wood Preserving/Treating Spills, leaks, or improper handling of wood preservatives and other chemicals during transportation, use, srage and disposal may C50 Others (ist) Spills, leaks, or improper handling of chemicals and other materials during transportation, use, srage, and disposal may Risk SW Oregon Drinking Water Protection Program Page 4 of 9 Rev. 2/7/99

18 TABE 2. POSSIBE WATER QUAITY IPACTS FOR POTENTIA CONTAINANT SOURCES DEQ PCS CODE AGRICUTURA / FOREST AND USES TYPE OF ACTIVITY POTENTIA WATER QUAITY IPACTS Risk GW A0 Auction ots Improper srage and management of animal wastes and wastewater in areas of concentrated livesck may impact drinking water. A02 Boarding Stables Improper srage and management of animal wastes and wastewater in areas of concentrated livesck may impact drinking water. A03 A04 A05 Confined Animal Feeding Operations (CAFOs) Crops - Irrigated - Berries, ops, int, Orchards, Vineyards/Nurseries, Green ouses, Vegetables, etc. Crops - Nonirrigated - Christmas Trees, Grains, Grass Seeds, ay, Pasture Improper srage and management of animal wastes and wastewater in areas of concentrated livesck may impact drinking water. Over-application or improper handling of pesticides or fertilizers may impact drinking water. Excessive irrigation may cause transport of contaminants or sediments groundwater/surface water through runoff. NOTE: *Dripirrigated crops such as vineyards and some vegetables, are considered be a low risk. Over-application or improper handling of pesticides or fertilizers may impact drinking water. Some agricultural practices may result in excess sediments discharging surface waters, but non-irrigated crops are generally considered be a low risk groundwater and surface water. Risk SW * A06 Farm achinery Repair Spills, leaks, or improper handling of solvents and petroleum products during transportation, use, srage and disposal may A07 Grazing Animals - > 5 arge Animals or Equivalent/Acre Improper srage and management of animal wastes may impact drinking water supply. Concentrated livesck may contribute erosion and sedimentation of surface water bodies. A08 agoons/iquid Wastes Improper seepage or overflows of liquid wastes may impact the drinking water supply. A09 and Application Sites Improper management of sludge and wastewater may impact drinking water supply. A0 A anaged Forest ands - Broadcast Fertilized Areas anaged Forest ands - Clearcut arvested - < 35 yrs Over-application or improper handling of pesticides or fertilizers may impact the drinking water source. Cutting and yarding of trees may contribute increased erosion, resulting in turbidity and chemical changes in drinking water supply. Over-application or improper handling of pesticides or fertilizers may impact drinking water source. Oregon Drinking Water Protection Program Page 5 of 9 Rev. 2/7/99

19 TABE 2. POSSIBE WATER QUAITY IPACTS FOR POTENTIA CONTAINANT SOURCES DEQ PCS CODE A2 A3 A4 TYPE OF ACTIVITY POTENTIA WATER QUAITY IPACTS Risk GW anaged Forest ands - Partial arvested - <0 yrs anaged Forest ands - Road Density - > 2 mi/sq mi Pesticide/Fertilizer/Petroleum Srage, andling, ixing, & Cleaning Areas Cutting and yarding of trees may contribute increased erosion, resulting in turbidity and chemical changes (ex:nitrates) in drinking water supply. Over-application or improper handling of pesticides or fertilizers may impact drinking water source. Road building, maintenance, and usage may contribute erosion and slope failure causing turbidity in drinking water supply. Vehicle usage increases the risks of leaks or spills of petroleum products and other hazardous materials. eaks, spills and improper handling of pesticides, fertilizers and petroleum products may impact drinking water source. A5 Recent Burn Areas - < 0 yrs Vegetation removal by fire may increase surface erosion and sediment delivery rates, resulting in high turbidity in drinking water source. A50 Others (ist) The impacts of this potential contaminant source will be addressed during the enhanced invenry. Risk SW Oregon Drinking Water Protection Program Page 6 of 9 Rev. 2/7/99

20 TABE 2. POSSIBE WATER QUAITY IPACTS FOR POTENTIA CONTAINANT SOURCES ISCEANEOUS AND USES DEQ PCS CODE TYPE OF ACTIVITY POTENTIA WATER QUAITY IPACTS Risk GW 0 Above Ground Srage Tanks Spills, leaks, or improper handling of sred materials may 02 Channel Alterations - eavy Construction or maintenance of channel may cause erosion, resulting in increase in turbidity of surface water. Improper stream alterations may also contribute increase in potential for flooding. 03 Combined Sewer Outfalls Combined sewer overflows contribute untreated wastewater at the outfall. 04 Srmwater Outfalls Srmwater run-off may contain contaminants from residential (homesites and roads), commercial/industrial, and agricultural use areas. 05 Composting Facilities Srage and improper handling of organic material, animal waste, and wastewater may impact drinking water. 06 isric Gas Stations isric spills, leaks, or improper handling of solvents and petroleum products may Abandoned underground srage tanks may be present. 07 isric Waste Dumps/andfills Water percolating through old landfills or dump sites may transport contaminants groundwater or surface water supply. 08 omesteads - Rural - achine Shops Spills, leaks, or improper handling of solvents, fuels, and other materials or chemicals during transportation, use, srage and disposal may 09 omesteads - Rural - Septic Systems < /Acre 0 Injection Wells/Drywells/Sumps - Class V UICs If not properly sited, designed, installed, and maintained, septic systems can impact drinking water. Use of drain cleaners and dumping household hazardous wastes can result in groundwater contamination. Shallow injection wells may transport untreated wastewater (process or srm water) directly in groundwater and impact drinking water. Kennels - > 20 Pens Improper srage, management, and disposal of animal wastes and wastewater in areas of concentrated animals may impact drinking water. 2 ilitary Installations Spills, leaks, or improper handling of chemicals and other materials during transportation, use, srage and disposal may ay also contain ordnance or waste landfills/dump sites, as well as other potential contaminant sources. 3 Random Dumpsites Illegal trash and debris containing chemicals and hazardous materials may cause contamination groundwater or surface water supply. Risk SW Oregon Drinking Water Protection Program Page 7 of 9 Rev. 2/7/99

21 TABE 2. POSSIBE WATER QUAITY IPACTS FOR POTENTIA CONTAINANT SOURCES DEQ PCS CODE TYPE OF ACTIVITY POTENTIA WATER QUAITY IPACTS Risk GW 4 River Recreation - eavy Use Inadequate disposal of human wastes may contribute bacteria and nutrients the drinking water supply. eavy use may contribute streambank erosion causing turbidity. Fuel spills and emissions may also contribute contamination of the drinking water supply. 5 Sludge Disposal Areas Improper management of sludge and wastewater may impact drinking water supply. 6 Srmwater Retention Basins Srmwater run-off may contain a wide variety of contaminants from residential, commercial/industrial, and agricultural use areas. 7 Transmission ines - Right-of-Ways Construction and corridor maintenance may contribute increased erosion and turbidity in drinking water supply. Over-application or improper handling of pesticides or fertilizers may impact drinking water supply. 8 Transportation Corridors - Freeways/State ighways Vehicle usage increases the risks for leaks or spills of fuels and other hazardous materials that may impact drinking water. Road building, maintenance, and usage may contribute increased erosion and slope failure causing turbidity in drinking water source. Over-application or improper handling of pesticides or fertilizers may impact the drinking water supply. 9 Transportation Corridors - Railroads Rail transport increases the risks for leaks or spills of fuels and other hazardous materials that may impact drinking water. Installation and maintenance of tracks may contribute increased erosion and slope failure causing turbidity in drinking water source. Over-application or improper handling of pesticides adjacent tracks may impact the drinking water supply Transportation Corridors - Right-of- Ways - erbicide Use Areas Transportation Corridors - River Traffic eavy Transportation Corridors - Stream Crossing Perennial 23 UST - Confirmed eaking Tanks - DEQ ist Over-application or improper handling of pesticides may impact drinking water supply. eavy river usage may contribute riverbank erosion and increased turbidity in drinking water supply. Fuel and other chemical leaks, spills and emissions may also contribute drinking water contamination. Road building, maintenance, and usage may contribute erosion and slope failure causing turbidity in drinking water source. Vehicle usage increases the risks of leaks or spills of fuels and other chemicals in highly sensitive areas. Overapplication or improper handling of pesticides in right-of-way may also impact drinking water source. Existing contamination from spills, leaks, or improper handling of sred materials may impact the drinking water supply. 24 UST Decommissioned isric spills or leaks may Risk SW Oregon Drinking Water Protection Program Page 8 of 9 Rev. 2/7/99

22 TABE 2. POSSIBE WATER QUAITY IPACTS FOR POTENTIA CONTAINANT SOURCES DEQ PCS CODE TYPE OF ACTIVITY POTENTIA WATER QUAITY IPACTS Risk GW 25 UST - Non-Regulated Tanks - <,00 gals 26 UST - Not Yet Upgraded or Registered Tanks 27 UST - Upgraded and/or Registered Active Spills, leaks, or improper handling of sred materials may Spills, leaks, or improper handling of sred materials may Spills or improper handling during tank filling or product distribution may 28 UST - Status Unknown Spills, leaks, or improper handling of sred materials may 29 Upstream Reservoirs During major srm events, reservoirs may contribute prolonged turbidity for downstream intakes for drinking water. Construction, fluctuating water levels, and heavy waterside use can increase erosion and turbidity in reservoir/drinking water source. 30 Wells/Abandoned Wells Improperly installed or maintained wells and abandoned wells may provide a direct conduit for contamination groundwater and drinking water source. 3 arge Capacity Septic Systems -Class V UIC (serves >20) If not properly sited, designed, installed, and maintained, septic systems can impact drinking water. 50 Others (ist) The impacts of this potential contaminant source will be addressed during the enhanced invenry. Risk SW Oregon Drinking Water Protection Program Page 9 of 9 Rev. 2/7/99