Science & Technology
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WhAEM2000 BBM Files - Sunbury, Pennsylvania
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Sunbury Quadrangle, Pennsylvania. Files serve as geographic basis for groundwater modeling.
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WhAEM2000 BBM Files - State College, Pennsylvania
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for State College Quadrangle, Pennsylvania. Files serve as geographic basis for groundwater modeling.
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WhAEM2000 BBM Files - Scranton, Pennsylvania
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Scranton Quadrangle, Pennsylvania. Files serve as geographic basis for groundwater modeling.
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WhAEM2000 BBM Files - Reading, Pennsylvania
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Reading Quadrangle, Pennsylvania. Files serve as geographic basis for groundwater modeling.
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WhAEM2000 BBM Files - Pittsburgh West, Pennsylvania
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Pittsburgh West Quadrangle, Pennsylvania. Files serve as geographic basis for groundwater modeling.
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WhAEM2000 BBM Files - Pittsburgh East, Pennsylvania
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Pittsburgh East Quadrangle, Pennsylvania. Files serve as geographic basis for groundwater modeling.
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WhAEM2000 BBM Files - Olean, Pennsylvania
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Olean Quadrangle, Pennsylvania. Files serve as geographic basis for groundwater modeling.
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WhAEM2000 BBM Files - Oil City, Pennsylvania
WhAEM2000 (Wellhead Analytic Element Model) binary base map browser for Oil City Quadrangle, Pennsylvania. Files serve as geographic basis for groundwater modeling.
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Chemical Speciation Network (CSN) - General Information
This page includes general information about the Chemical Speciation Network that is not covered on the main page. Commonly visited documents, including calendars, site lists, and historical files for the program are listed here
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Chemical Speciation Network (CSN)
This is the homepage for EPA’s PM2.5 Chemical Speciation Network (CSN). The CSN is an ambient monitoring network comprised of the Speciation Trends Network (STN) and supplemental sites.
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Ambient Air Protocol Gas Verification Program
Document for the Ambient Air Protocol Gas Verification Program
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EPA Pilot Studies for Implementing New Treatment Technologies
EPA is in the process of researching emerging technologies that have the potential to reduce the cost of abandoned uranium mine cleanups. Information on these pilot studies can be found on this page.
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Water Quality Standards Variance Building Tool
The Water Quality Standards (WQS) Variance Building Tool helps states and authorized tribes determine whether a WQS variance is appropriate for a particular situation and helps navigate requirements at 40 CFR Part 131.14 for WQS variances.
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Re-engaging Your Volunteer Monitoring Organization
volunteer water monitoring coordinator
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Using Rain Gardens to Reduce Runoff—Slow it down, spread it out, soak it in!
Using Rain Gardens to Reduce Runoff: Slow it down, Spread it out, Soak it in!
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EPA’s Approval of Ohio’s Maumee Watershed Nutrient Total Maximum Daily Load
EPA’s Approval of Ohio’s Maumee Watershed Nutrient Total Maximum Daily Load
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Nitrogen and Phosphorus Pollution Series: State and Local Policies to Restrict the Use of Lawn Fertilizers
State and Local Policies to Restrict the Use of Lawn Fertilizers Webcast
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Nitrogen and Phosphorus Pollution Series: Nitrate in Ground Water
Nitrate in Ground Water
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An Overview of Harmful Algal Blooms (HABs) and Their Impacts in Freshwater and Marine Ecosystems
An Overview of Harmful Algal Blooms (HABs) and their Impacts in Freshwater and Marine Ecosystems