DOCUMENTS
Site Overview
The site began operations as a lead smelter in 1887. It was owned by Consolidated Kansas Smelting and Refining Company, which later merged with the American Smelting and Refining Company (ASARCO). ASARCO started producing copper in 1910, operated a Godfrey roaster for cadmium oxide productions in the 1930s, and constructed a slag fuming plant for zinc recovery in 1948. ASARCO added an antimony plant in 1970. The zinc plant was closed in 1982, the lead plant closed in 1985, the antimony plant shut down in 1986, and the cadmium plant was shut down in 1992. Most recently, in February 2009, the state air permit for the copper smelter was voided by the TCEQ at ASARCO’s request. The main potential chemicals of concern (PCOCs) are: Lead, Arsenic, Cadmium, Chromium, Copper, Iron, Selenium, Zinc. The media of concern is both soil and groundwater.
In 1994 and 1995, after a series of compliance inspections, it was determined that unauthorized discharges of solid waste, wastewater, and storm water had occurred at the facility. The Texas Natural Resource Conservation Commission (TNRCC; the immediate predecessor of the TCEQ) issued an Agreed Order. The Order instructed ASARCO to conduct a site characterization, define the horizontal and vertical extent of soil and groundwater contamination, and define the extent of contamination across property boundaries.
In October 1998, ASARCO completed the initial site investigation and submitted the ASARCO El Paso Copper Smelter Remedial Investigation Report, El Paso, Texas.
In April 1999, the U.S. Environmental Protection Agency (EPA) and the State of Texas filed a civil enforcement action in federal district court that alleged ASARCO violated the Resource Conservation and Recovery Act (RCRA) by failing to properly manage hazardous waste and engaging in unlawful recycling practices. This action resulted in an April 1999 Consent Decree (H-99-1136) being entered in federal district court. In addition to addressing other ASARCO sites, the Consent Decree directed ASARCO to complete the corrective action work at the El Paso site under the 1996 State of Texas Agreed Order. The Consent Decree was subsequently modified in 2004.
On May 20, 2005, the TCEQ issued a Corrective Action Directive to ASARCO to conduct remedial action for the El Paso site. In 2005, ASARCO and related entities declared Chapter 11 bankruptcy.
On Nov. 13, 2009 the United States District Court for the Southern District of Texas in Corpus Christi issued an order confirming the plan of reorganization. On December 9, 2009, ASARCO placed $52,080,000 in an environmental custodial trust to address remedial activities.
- Agency Oversight
- American Canal
- Community
- Encycle Documents
- Health & Safety
- Legal
- Parker Brothers Arroyo
- PCB Issues
- Presentations
- Property Sale
- Redevelopment
- Stack Demolition & Site Assets
- Technical
Agency Oversight
- TCEQ Letter Re. Renewal of Exemption of Waste Reduction Policy Act Requirements, February 2, 2017
- TCEQ Letter regarding Compliance Evaluation Investigation at ASARCO, August 17, 2016
- TCEQ Letter regarding Compliance with the Waste Reduction Policy Act, August 1, 2016
- Final EPA R6 Oversight Work Plan for the Former Asarco Smelter Site, February 6, 2012
American Canal
- TCEQ Acknowledgment of Receipt and Concurrence to Proceed regarding the following submittal: IBWC Site Access and American Canal Extraction Soil Import – Update, (dated October 15, 2018), October 16, 2018
- TCEQ Acknowledgement of Receipt and Concurrence to Proceed regarding the following submittals: IBWC Site Access and North Rio Grande Soil Import, dated March 27, 2015; and IBWC (c/o VEMAC) Site Access and South American Canal Soil Import, dated March 27, 2015 (April 2, 2015)
- Letter to TCEQ- IBWC Site Access and North Rio Grande Soil Import, March 27, 2015
- Letter to TCEQ- IBWC (c/o VEMAC) Site Access and South American Canal Soil Import, March 27, 2015
Community
Community Plans
-
Final Community Assurance Plan (CAP), April 14, 2011 (Click to expand)
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Final Community Relations Plan, February 2011 (Click to expand)
Ex-ASARCO Group Communications
- Trustee Letter Regarding Interaction with TRLA, September 21, 2013
- Ex-ASARCO Workers Site Visit Data Summary, March 26, 2011
- EPA Letter to the Ex-ASARCO Group, February 25, 2011
- Trust Response to Public Comments Submitted by Ex-ASARCO Workers, El Paso Regional Sierra Club, Sunland Park Grassroots Environmental Group, 2011
Input
Save the Stacks Group
- Trustee Letter to Save the Stacks Group, December 5, 2012
- ASARCO Presentation to El Paso City Council, November 27, 2012
- Trustee Letter to Mayor Cook re the City Resolution, November 2012
- Trustee Review of Save the Stacks Group (HKN Engineers) Structural Evaluation, November 2012
- Proposed City Resolution, by Save the Stack Group, November 2012
- 828′ Stack Report, Industrial Access, November 2012
- Structural Investigation of Asarco Stack, HKN Engineers, November 2012
- Engineering Report – Executive Summary, HKN Engineers, November 2012
- 50-year Cost Estimate, Industrial Access, November 2012
Technical Assistance Services for Communities (TASC)
- TASC Potential Mono-fill Remedy for the Former ASARCO Smelter Site in El Paso, October 12, 2012
- TASC Potential Ground Water Remedy for the Former ASARCO Smelter Site in El Paso, October 12, 2012
- Technical Assistance Services for Communities (TASC) – Final Report on Former ASARCO Smelter Site, Technical Comments on Community Concerns Regarding the Draft Remedial Action Work Plan, May 25,2011
- Trustee Response to TASC Comments received 2/2/11; Former ASARCO Smelter Site, El Paso Texas, Technical Comments on Community Concerns with the Draft Remedial Action Work Plan, February 22, 2011
Encycle Documents
Health & Safety
Legal
- Agreed Order Approving Amended Deed, August 7, 2013
- Cultural Resources Inventory and Mechanical Scrapings Report, April 2013
- Trust Properties Survey, December 2010
- Texas Custodial Trust Agreement, December 8, 2009
- Summary Status of the 2005 Compliance Directive, October 12, 2009
- Texas Bankruptcy Order, June 5, 2009
- ASARCO – Settlement Agreement, March 2009
- EPA/Dept of Justice Confidential-For-Settlement-Purposes-Only ASARCO Document, July 31, 1998
- Agreed Order, August 29, 1996
Parker Brothers Arroyo
- Acknowledgement of Receipt and Notice to Proceed Upper Parker Brothers Channel and Fines Pile Design Clarifications (dated May 16, 2016), June 1, 2016
- Upper Parker Brothers Channel and Fines Pile Design Clarifications, May 16, 2016
- TCEQ Approval of Paisano Outlet and Railroad Channel Design Alternative Clarifications, dated April 6, 2016, April 12, 2016
- TCEQ Approval of Request to Modify the PRB Sampling Schedule, dated January 21, 2016, February 29, 2016
- Request to Modify the PRB Sampling Schedule, dated January 21, 2016
- Acknowledgement of Receipt and Notice to Proceed “Updated Submittal of the Upper Parker Brothers Arroyo Improvement Plans” dated 10/22/2015, October 28, 2015
- Acknowledgement of Receipt and Notice to Proceed, Updated Submittal of the Upper Parker Brothers Arroyo Improvement Plans, October 28, 2015
- Pre-Construction Notification for Nationwide Permit Coverage, June 2015
- TCEQ Approval of: 1. Response to TCEQ/EPA Comments received 5/2/14 regarding the Jan 2014 Field Demonstration of Zerovalent Iron Treatment Technology in PBA, dated 7/1/14 2. Revised Responses to the TCEQ/EPA Comments received 5/2/14 regarding the Jan 2014 Field Demonstration of Zerovalent Iron Treatment Technology in PBA, dated 10/31/14
- TCEQ/EPA – Acknowledgement and Notice to Proceed – Upper PBA Improvement Plans Including Regrading, Cover and Drainage Elements – August 21, 2014
- Upper Parker Brothers Arroyo (Fines Pile/Ephemeral Pond/Triangle Areas) Improvement Plans Including Regrading, Cover and Drainage Elements and CLOMR Application, July 2014
- TCEQ Notice to Proceed – PBA Interim Channel Design Revision, February 19, 2014
- Letter – Parker Brothers Arroyo Interim Channel Design Revision 3, February 5, 2014
- Parker Brothers Arroyo Interim Channel Design Revision 3, February 5, 2014
- Field Demonstration of Zerovalent Iron Treatment Technology in Parker Brothers Arroyo – Status Report, January 2014
- FEMA Approval Letter – CONDITIONAL LETTER OF MAP REVISION, August 2, 2013
- Required Slope Maintenance in Parker Brothers Arroyo, May 7, 2013
- Draft PRB Field Demonstration – Three Month Status Update, February 1, 2013
- TCEQ Approval on East Borrow Source Sampling Procedures and Category 1 Landfill Removal Plan, December 10, 2012
- Malcolm Pirnie – East Borrow Source Environmental Sampling Procedures for Interim Channel Backfill and East Category I Landfill Removal Plan, December 7, 2012
- Pre-Construction Notification for Nationwide Permit Coverage, September 2012
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Field Demonstration of Zerovalent Iron Treatment Technology (Click to expand)
- Approval on Interim Channel Soil Removal in Parker Brothers Arroyo, December 5, 2011
- Endangered Species Act (ESA) Informal Consultation for Site Restoration Work at the Former ASARCO Smelter (The U.S. Fish and Wildlife Service concurs that no additional consultations are required for federally listed Threatened and Endangered species.)
- Interim Channel Project Including Impacted Soil Removal and Soil Amendment in Parker Brothers Arroyo, Malcolm Pirnie, November 29, 2011
PCB Issues
- TCEQ Acknowledgement of Receipt and Notice to Proceed: Excavations and Disposal of Soil at the Powerhouse (AE11) Impacted by Polychlorinated Biphenyls (PCBs), dated September 29, 2014, October 21, 2014
- Excavations and Disposal of Soil at the Powerhouse (AE11) Impacted by Polychlorinated Biphenyls (PCBs), September 29, 2014
- Additional PCB Sampling and Remediation Plan as an Addendum to the PCB Investigation Work Plan, January 25, 2013
- PCB Investigation Work Plan, April 2012
- Memo – Reverberatory Furnace Operations Review and Possible Implications of PCB Disposal in the Furnace, August 16, 2011
- Ex-ASARCO Workers Response to Malcolm Pirnie’s Memo, “Reverberatory Furnace Operations Review and Possible Implications of PCB Disposal in the Furnace,” October 4, 2011
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Data Usability Summary, PCB Rinse Water, May/June 2011 (Click to expand)
Presentations
- Former ASARCO Smelter 2016 Status Report Presentation to El Paso Rotary Club, August 18, 2016
- Community Meeting Presentation, June 16, 2016
- Community Meeting Presentation, February 26, 2013
- ASARCO OLLI Changing World Series Presentation, February 11, 2013
- ASARCO Sierra Club Presentation, January 30, 2013
- ASARCO Presentation to El Paso City Council, November 27, 2012
- Presentation to the Committee for a Future El Paso, September 15, 2012
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Community Meeting Presentation, November 3, 2011 (Click to expand)
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Meeting with UTEP Forum, May 19, 2011 (Click to expand)
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TCEQ & EPA Meeting in Austin, TX, May 6, 2011 (Click to expand)
- PNL Open Space Advisory Committee Presentation, March 2, 2011
- EPA Project Briefing and Site Tour, January 2011
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Community Meeting – Texas Custodial Trust Activities Update, October 19, 2010 (Click to expand)
- Presentation
- Demolition Animation
- 3D Model Frame 1 Aerial
- 3D Model Frame 2 Aerial and GIS Features
- 3D Model Frame 3 GIS Features Only
- 3D Model Frame 4 Investigation Phase
- 3D Model Frame 5 Zinc in Soil
- 3D Model Frame 6 Selenium in Soil
- 3D Model Frame 7 Chromium in Soil
- 3D Model Frame 8 Copper in Soil
- 3D Model Frame 9A Copper with Unload Area
- 3D Model Frame 9B Copper Zoom Into Unload Area
- 3D Model Frame 10 Cadmium in Soil
- 3D Model Frame 11 Cadmium with Unload Area
- 3D Model Frame 12 Cadmium with West Rail Line
- 3D Model Frame 13 Cadmium with Acid Plant
- 3D Model Frame 14 Cadmium with East of I-10 Landfill
- 3D Model Frame 15 Lead in Soil
- 3D Model Frame 16 Lead with Investigation Areas
- 3D Model Frame 17 Arsenic in Soil
- 3D Model Frame 18 Arsenic with Investigation Areas
- 3D Model Frame 18A Arsenic Zoom to Unload Area
- 3D Model Frame 18B Arsenic Zoom to West Rail Line and Acid Plant
- 3D Model Frame 18C Arsenic Zoom to Acid Plant
- 3D Model Frame 18D Arsenic Zoom to East of I-10 Landfill
- PNL Charrette Presentation: Introduction to the Texas Custodial Trust, June 2010
- PNL Paso Del Norte Presentation, March 16, 2010
- PNL Sierra Club Presentation, February 24, 2010
Property Sale
Redevelopment
Stack Demolition & Site Assets
- TCEQ Approval of the Pre-and Post-Stack Demolition Sampling, August 2, 2013
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Lab Reports for Dust Material Removed from 612′ Stack, May 28, 2013 (Click to expand)
The attached lab reports include analytical results for material that was removed from the base and interior side walls of the 612-ft chimney prior to demolition. The interior of the chimney walls was visually inspected for accumulated material. In addition to material on the ground at the base, material was only observed to an elevation of approximately 100-ft above ground surface. The material on the walls was removed by scraping and pressure washing the interior surface. The material at the base was collected along with residuals from the pressure washing and placed in Bay 14 of the Bedding Building with other Category 1 material. The material will be placed in Cell 4 on site. The removal activities described above were completed prior to the chimney demolition event.
Three laboratory reports are included. The November 12, 2012 report provides data for a sample of the material collected prior to the material being removal from the chimney. The April 10, 2013 report provides data for 4 composite samples of the material after it was removed from the chimney. The April 19, 2013 report is a quality assurance test by another laboratory on one of the samples reported in the April 10th report.
- Draft Memo regarding Preliminary Chemical Concentration Data Summary of Stack Demolition Sampling Results for Onsite and Offsite Air Monitoring Locations, April 26, 2013
- ASARCO Demolition City Permit, April 11, 2013
- Post Stack Demolition Sampling Plan, April 11, 2013
- City of El Paso – Explosives Permit, April 8, 2013
- ASARCO Chimney Demolition Plan, April 5, 2013 (Large file, 28MB)
- PROFEPA and Civil Protection Notification, March 28, 2013
- U.S./Mexico National Coordinator Notification, March 27, 2013
- Annex 5, La Paz Agreement Notification, March 25, 2013
- Stack Concrete Sampling Plan, March 2013
- Limited Structural Assessment of Powerhouse Building, ERM, October 17, 2012
- Decontamination Process at Former ASARCO Smelter Site, August 16, 2011
- Demolition Phasing and Sequence, April 2011
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Demolition Project Manual, January 2011 (Click to expand)
- TCEQ Approval Letter, May 9, 2011
- Demolition Project Manual, January 2011 (Large File, 40MB – Right-click and save to your desktop to avoid browser crashes.)
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Contop & Old Reverb Asset Recovery Project, October 2010 (Click to expand)
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Asbestos Surveys(Click to expand)
- Analysis of the Structural Integrity of the 826’ ASARCO Dual Smokestack, September 2010
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Stack Information(Click to expand)
- Soil and Foundation Investigation Report, Converter Building Evacuation System, March 29, 1976
- Soil and Foundation Investigation Report, 500TPD Converter Gas Acid Plant, January 23, 1971
- Stack Information
- Combined Drawings Low Res Part-1
- Combined Drawings Low Res Part-2
- Combined Drawings Low Res Part-3
- UTEP Preliminary Assessment of Suitability of ASARCO Slag Material Presentation, August 26, 2010
- Asarco Railroad Removal Plan, August 13, 2010
- Use of Copper and Lead Slag in Highway Construction: Literature Search-Materials Use and Construction Considerations, March 2010
Technical
Air Monitoring Data
- View air monitoring data
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Asarco Dust Monitoring Summaries(Click to expand)
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2017(Click to expand)
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2016(Click to expand)
- Asarco Dust Monitoring Summary, December 2016
- Asarco Dust Monitoring Summary, November 2016
- Asarco Dust Monitoring Summary, October 2016
- Asarco Dust Monitoring Summary, September 2016
- Asarco Dust Monitoring Summary, August 2016
- Asarco Dust Monitoring Summary, July 2016
- Asarco Dust Monitoring Summary, June 2016
- Asarco Dust Monitoring Summary, May 2016
- Asarco Dust Monitoring Summary, April 2016
- Asarco Dust Monitoring Summary, March 2016
- Asarco Dust Monitoring Summary, February 2016
- Asarco Dust Monitoring Summary, January 2016
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2015(Click to expand)
- Asarco Dust Monitoring Summary, December 2015
- Asarco Dust Monitoring Summary, November 2015
- Asarco Dust Monitoring Summary, October 2015
- Asarco Dust Monitoring Summary, September 2015
- Asarco Dust Monitoring Summary, August 2015
- Asarco Dust Monitoring Summary, July 2015
- Asarco Dust Monitoring Summary, June 2015
- Asarco Dust Monitoring Summary, May 2015
- Asarco Dust Monitoring Summary, April 2015
- Asarco Dust Monitoring Summary, March 2015
- Asarco Dust Monitoring Summary, February 2015
- Asarco Dust Monitoring Summary, January 2015
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2014(Click to expand)
- Asarco Dust Monitoring Summary, December 2014
- Asarco Dust Monitoring Summary, November 2014
- Asarco Dust Monitoring Summary, October 2014
- Asarco Dust Monitoring Summary, September 2014
- Asarco Dust Monitoring Summary, August 2014
- Asarco Dust Monitoring Summary, July 2014
- Asarco Dust Monitoring Summary, June 2014
- Asarco Dust Monitoring Summary, May 2014
- Asarco Dust Monitoring Summary, April 2014
- Asarco Dust Monitoring Summary, March 2014
- Asarco Dust Monitoring Summary, February 2014
- Asarco Dust Monitoring Summary, January 2014
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2013(Click to expand)
- Asarco Dust Monitoring Summary, December 2013
- Asarco Dust Monitoring Summary, November 2013
- Asarco Dust Monitoring Summary, October 2013
- Asarco Dust Monitoring Summary, September 2013
- Asarco Dust Monitoring Summary, August 2013
- Asarco Dust Monitoring Summary, July 2013
- Asarco Dust Monitoring Summary, June 2013
- Asarco Dust Monitoring Summary, May 2013
- Asarco Dust Monitoring Summary, April 2013
- Asarco Dust Monitoring Summary, March 2013
- Asarco Dust Monitoring Summary, February 2013
- Asarco Dust Monitoring Summary, January 2013
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2012(Click to expand)
- Asarco Dust Monitoring Summary, December 2012
- Asarco Dust Monitoring Summary, November 2012
- Asarco Dust Monitoring Summary, October 2012
- Asarco Dust Monitoring Summary, September 2012
- Asarco Dust Monitoring Summary, August 2012
- Asarco Dust Monitoring Summary, June 2012
- Asarco Dust Monitoring Summary, May 2012
- Asarco Dust Monitoring Summary, April 2012
- Asarco Dust Monitoring Summary, March 2012
- Asarco Dust Monitoring Summary, February 2012
- Asarco Dust Monitoring Summary, January 2012
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2011(Click to expand)
- Asarco Dust Monitoring Summary, December 2011
- Asarco Dust Monitoring Summary, November 2011
- Asarco Dust Monitoring Summary, October 2011
- Asarco Dust Monitoring Summary, September 2011
- Asarco Dust Monitoring Summary, August 2011
- Asarco Dust Monitoring Summary, July 2011
- Asarco Dust Monitoring Summary, June 2011
- Asarco Dust Monitoring Summary, May 2011
- Asarco Dust Monitoring Summary, April 2011
- Asarco Dust Monitoring Summary, March 2011
- Asarco Dust Monitoring Summary, February 2011
- Asarco Dust Monitoring Summary, January 2011
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Groundwater
- Acknowledgement of Receipt of “2015 Groundwater and Surface Water Sampling Results Summary,” dated 5/4/2016, June 28, 2016
- 2015 Groundwater and Surface Water Sampling Results Summary, May 4, 2016
- Acknowledgement of Receipt of “2014 Groundwater and Surface Water Sampling Results Summary,” dated 8/4/2015, November 5, 2015
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2014 Groundwater and Surface Water Sampling Results Summary, August 4, 2015(Click to expand)
- TCEQ Approval of Request to Plug and Abandon Two Monitoring Wells (11/3/14), December 5, 2014
- Diesel 2 Case Closure Letter from TCEQ, October 25, 2013
- Transmittal of 2012 Groundwater and Surface Water Sampling Results, June 4, 2013
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Fall 2012 Ground Water Data Figures(Click to expand)
- ASARCO Groundwater and Surface Water Data (data included is all semi-annual groundwater sampling conducted between 2005 and 2011), October 2012
- 2011 Diesel 2 Plume Recovery System – 2011 Annual Groundwater Monitoring Report, July 2012
- Transmittal of 2011 Groundwater and Surface Water Sampling Results Summary, July 2012
- Draft transmittal of 2011 Groundwater and Surface Water Sampling Results, June 2012
- 2009 and 2010 Groundwater and Surface Water Data Summary, October 2011
- 2010 Operation, Monitoring and Performance Report, Diesel No. 2 Remediation Site, March 30, 2011 (Large File, 93MB – Right-click and save to your desktop to avoid browser crashes.)
- Summary of 2008 O&M Activities:Diesel #2 Remediation Site
- Groundwater Engineering Evaluation and Cost Analysis (EECA), February 2008
Plant Site
- TCEQ- Acknowledgement of Receipt and Notice to Proceed, Proposed Revised Workplan, dated 6/21, June 26, 2017
- Border West Expressway (State Loop 375) in El Paso County Proposed Revised Work Plan, June 21, 2017
- TCEQ Approval of Affected Property Assessment Report and Response Action Completion Report (dated November 14, 2016), January 5, 2017
- TCEQ Approval of Notification of Removal and Cover Activities Planned for Texas Custodial Trust (TCT) Property Between Union Pacific Railroad (UPRR) Tracks, April 6, 2016, April 13, 2016
- Notification of Removal and Cover Activities Planned for Texas Custodial Trust (TCT) Property Between Union Pacific Railroad (UPRR) Tracks, April 6, 2016
- TCEQ Comments Request to plug and abandon wells, February 22, 2016
- Letter to Request to plug and abandon wells, February 22, 2016
- Plant Site Plugging and Abandonment Report, January 21, 2016
- Request to Plug & Abandon Monitoring Wells , January 21, 2016
- TCEQ Approval of “Response to May 22, 2015 TCEQ Comment Letter, dated July 23, 2015,” August 17, 2015
- TCEQ Approval Letter to Plug Abandon Wells, June 2, 2015
- TCEQ Approval of: (1) Request to Plug and Abandon Monitoring Wells at the Former ASARCO Smelter and (2) Request to Include EP-86 for Plugging and Abandonment, June 2, 2015
- Request to Plug & Abandon Monitoring Wells at the Former ASARCO Smelter Site, May 5, 2015
- Plant Site Cover Improvement Plans and Specifications/CQA Requirements Submittal, April 21, 2015
- Proposed Plant Site Evapotranspirative Soil, Asphalt and Flexible Membrane Covers, April 8, 2015
- TCEQ Acknowledgement of Receipt and Concurrence to Proceed regarding the following submittal: Plant Site Utilities Abandonment – Expedited Review Request, dated March 31, 2015 (April 2, 2015)
- Plant Site Utilities Abandonment – Expedited Review Requested, March 31, 2015
Remedial Designs/Remedial Investigations
- “TCEQ Approval of the Supplemental Remedial Investigation Report, dated October 17, 2014,” February 2, 2015
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Revised Supplemental Remediation Investigation Report, Former ASARCO Smelter Site, El Paso, Texas, October 2014 (Click to expand)
- Submittal Letter, October 2014
- Revised Supplemental Remedial Investigation Report, October 2014
- Tables
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Figures (Click to expand)
- Fig 1-1 Site Location Map
- Fig 1-2 Land Use
- Fig 1-3 Plant Site Stormwater
- Fig 1-4 Off Site Soil Sample Location
- Fig 1-5 Category I Landfill Material Location
- Fig 1-6 PRB Locations
- Fig 1-7 Diesel 2 Location
- Fig 2-1 Historical Investigation Areas
- Fig 2-2 Assessment Areas
- Fig 3-1 East Mtn IA Supp RI Soil Locs
- Fig 3-2 East Prop IA Supp RI Soil – Test Pit Locs
- Fig 3-3 PBA AA Supp RI Soil Locs
- Fig 3-4 Plant Area IA – Soil Samples
- Fig 3-5 GW Interim Mon Locations
- Fig 3-6 GW Supplemental RI GW Locs
- Fig 3-7 Surface Water Interim Mon Locs
- Fig 4-1 Soil Sample Locations
- Fig 4-2 Antimony Soil Locations East Mtn
- Fig 4-3 Arsenic Soil Locations East Mtn
- Fig 4-4 Lead Soil Locations East Mtn
- Fig 4-5 Mercury Soil Locations East Mtn
- Fig 4-6 Antimony Soil Locations East Prop
- Fig 4-7 Arsenic Soil Locations East Prop 1
- Fig 4-8 Arsenic Soil Locations East Prop 2
- Fig 4-9 Cadmium Soil Locations East Prop 1
- Fig 4-10 Cadmium Soil Locations East Prop 2
- Fig 4-11 Copper Soil Locations East Prop 1
- Fig 4-12 Copper Soil Locations East Prop 2
- Fig 4-13 Lead Soil Locations East Prop 1
- Fig 4-14 Lead Soil Locations East Prop 2
- Fig 4-15 Mercury Soil Locations East Prop
- Fig 4-16 Selenium Soil Locations East Prop 1
- Fig 4-17 Selenium Soil Locations East Prop 2
- Fig 4-18 Antimony Soil Locations PBA
- Fig 4-19 Arsenic Soil Locations PBA 1
- Fig 4-20 Arsenic Soil Locations PBA 2
- Fig 4-21 Cadmium Soil Locations PBA 1
- Fig 4-22 Cadmium Soil Locations PBA 2
- Fig 4-23 Copper Soil Locations PBA 1
- Fig 4-24 Copper Soil Locations PBA 2
- Fig 4-25 Lead Soil Locations PBA 1
- Fig 4-26 Lead Soil Locations PBA 2
- Fig 4-27 Mercury Soil Locations PBA
- Fig 4-28 Arsenic Soil Locations Plant Entrance
- Fig 4-29 Lead Soil Locations Plant Entrance
- Fig 4-30 Arsenic Soil Locations South Terrace
- Fig 4-31 Cadmium Soil Locations South Terrace
- Fig 4-32 Copper Soil Locations South Terrace
- Fig 4-33 Lead Soil Locations South Terrace
- Fig 4-34 Mercury Soil Locations South Terrace
- Fig 4-35 Arsenic Soil Locations Pond 1
- Fig 4-36 Cadmium Soil Locations Pond 1
- Fig 4-37 Lead Soil Locations Pond 1
- Fig 4-38 Mercury Soil Locations Pond 1
- Fig 4-39 Antimony Soil Locations Pond 56
- Fig 4-40 Arsenic Soil Locations Pond 56
- Fig 4-41 Cadmium Soil Locations Pond 56
- Fig 4-42 Lead Soil Locations Pond 56
- Fig 4-43 Mercury Soil Locations Pond 56
- Fig 4-44 PCB Ponds 56
- Fig 4-45 Antimony Soil Locations Acid Plant
- Fig 4-46 Arsenic Soil Locations Acid Plant
- Fig 4-47 Cadmium Soil Locations Acid Plant
- Fig 4-48 Lead Soil Locations Acid Plant
- Fig 4-49 Mercury Soil Locations Acid Plant
- Fig 4-50 PCB Acid Plant
- Fig 4-51 Arsenic Soil Locations La Calavera
- Fig 4-52 Lead Soil Locations La Calavera
- Fig 4-53 Mercury Soil Locations La Calavera
- Fig 4-54 Arsenic Soil Locations Flood plain
- Fig 4-55 Lead Soil Locations Flood plain
- Fig 4-56 Site Wide Distribution Antimony
- Fig 4-57 Site Wide Distribution Arsenic
- Fig 4-58 Site Wide Distribution Cadmium
- Fig 4-59 Site Wide Distribution Copper
- Fig 4-60 Site Wide Distribution Lead
- Fig 4-61 Site Wide Distribution Mercury
- Fig 4-62 Site Wide Distribution Selenium
- Fig 4-63 Water Level Contours Fall 2012
- Fig 4-64 Antimony GW Fall 2012
- Fig 4-65 Arsenic GW Fall 2012
- Fig 4-66 Cadmium GW Fall 2012
- Fig 4-67 Chromium 2010 to 2012
- Fig 4-68 Cobalt GW Fall 2012
- Fig 4-69 Copper 2010 to 2012
- Fig 4-70 Fluoride 2010 to 2012
- Fig 4-71 Lead GW Fall 2012
- Fig 4-72 Molybdenum GW Fall 2012
- Fig 4-73 Mercury 2011 to 2012
- Fig 4-74 Nickel 2011 to 2012
- Fig 4-75 Nitrate GW Fall 2011
- Fig 4-76 Selenium GW Fall 2012
- Fig 4-77 Thallium GW Fall 2012
- Fig 4-78 Zinc GW Fall 2012
- Fig 4-79 PB Arroyo Sat Thickness
- Fig 4-80 PBA Bedrock Surface Contour Map
- Fig 4-81 Arsenic SW 2010 to 2012
- Fig 4-82 Chloride SW 2010 to 2012
- Fig 4-83 Iron SW 2010 to 2012
- Fig 4-84 Magnesium SW 2010 to 2012
- Fig 4-85 Nitrate SW 2010 to 2012
- Fig 4-86 Manganese SW 2010 to 2012
- Fig 4-87 Selenium SW 2010 to 2012
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Appendices (Click to expand)
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- Appendix A ENCYCLE Data Review
- Appendix B Hydrogeology Review
- Appendix C Surface Water and Groundwater Interaction
- Appendix D Historical Trend Charts-GW SW Data
- Appendix E Soil Sampling Locations
- Appendix F Soil Analytical Data
- Appendix G Soil Boring-Test Pit-Monitoring Well Construction Logs
- Appendix H Groundwater and Surface Water Sampling Locations
- Appendix I Groundwater and Surface Water Sampling Results
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Appendix J Laboratory Analytical and Data Usability Reports (Click to expand)
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J-1 Laboratory Analytical (Click to expand)
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GW February-March 2011 (Click to expand)
- 560_24729QC.pdf
- 560_24764QC.pdf
- 560_24792QC.pdf
- 560_24816QC.pdf
- 560_24843QC.pdf
- 560_24873QC.pdf
- 1103093-El-Paso-Smelter-Final.pdf
- 1103148-El-Paso-Smelter-Final.pdf
- 1103192-El-Paso-Smelter-Final.pdf
- 1103221-El-Paso-Smelter-Final.pdf
- 1103223-El-Paso-Smelter-Final.pdf
- 1103272-El-Paso-Smelter-Final.pdf
- J24729-1-Tx_Trrp_L3-Final-Report.pdf
- J24729-1-Tx_Trrp_L3-Rev(1)Final-Report.pdf
- J24735-1-Tx_Trrp_L3-Final-Report.pdf
- J24764-1-Tx_Trrp_L3-Rev(1)Final-Report.pdf
- J24792-1-Tx_Trrp_L3-Final-Report.pdf
- J24816-1-Tx_Trrp_L3-Final-Report.pdf
- J24843-1-Tx_Trrp_L3-Final-Report.pdf
- J24873-1-Tx_Trrp_L3-Final-Report.pdf
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GW August-September 2011 (Click to expand)
- 1109057-El-Paso-Smelter-Final.pdf
- 1109206-El-Paso-Smelter-Final.pdf
- 1109312-El-Paso-Smelter-Final.pdf
- 1109379-El-Paso-Smelter-Final.pdf
- J27314-1-Tx_Trrp_L3-Final-Report.pdf
- J27886-1-Tx_Trrp_L3-Final-Report.pdf
- J27915-1-Tx_Trrp_L3-Final-Report.pdf
- J27939-1-Tx_Trrp_L3-Final-Report.pdf
- J27993-1-Tx_Trrp_L3-Final-Report.pdf
- J28008-1-Tx_Trrp_L3-Final-Report.pdf
- J28040-1-Tx_Trrp_L3-Final-Report.pdf
- J28052-1-Tx_Trrp_L3-Final-Report.pdf
- J28113-1-Tx_Trrp_L3-Final-Report.pdf
-
GW February-March 2012 (Click to expand)
- 1202971-El-Paso-Smelter-Final.pdf
- 1203151-El-Paso-Smelter-Final.pdf
- J30890-1-UDS-Level-2-Report-Final-Report.pdf
- J30915-1-UDS-Level-2-Report-Final-Report.pdf
- J30938-1-UDS-Level-2-Report-Final-Report.pdf
- J30964-1-UDS-Level-2-Report-Final-Report.pdf
- J30985-1-UDS-Level-2-Report-Final-Report.pdf
- J31008-1-UDS-Level-2-Report-Final-Report.pdf
- J31034-1-UDS-Level-2-Report-Final-Report.pdf
- J31053-1-UDS-Level-2-Report-Final-Report.pdf
- J31084-1-UDS-Level-2-Report-Final-Report.pdf
-
East Mountain (Click to expand)
- 1208114-El-Paso-Smelter-Final.pdf
- 1208351-Former-Asarco-Smelter-Final.pdf
- J33933-1-UDS-Level-2-Report-Final-Report.pdf
- J33933-2-UDS-Level-2-Report-Final-Report.pdf
- J33933-3-UDS-Level-2-Report-Final-Report.pdf
- J34039-1-UDS-Level-2-Report-Final-Report.pdf
- J34040-1-UDS-Level-2-Report-Final-Report.pdf
- J34040-2-UDS-Level-2-Report-Final-Report.pdf
-
American Canal 2012 (Click to expand)
-
- J-2 Data Usability Summary Reports
-
-
- Appendix K Parker Brothers Arroyo Interim Channel Removals
- Appendix L East Property Information
- Appendix M Fines Pile and Ephemeral Pond Report
- Appendix N Boneyard Report
- Appendix O Interim Data Gap Report Soil Sampling Sept 2011
- Appendix P Interim Data Gap Report Oct 2011 Sampling Event
- Appendix Q HydroGeophysics–Seismic Survey Results
- Appendix R Results of Selective Sequential Extraction
- Appendix S Groundwater Sampling Method Comparison
- Appendix T Historical Slag Assessment
- Appendix U COC Distribution in Groundwater
-
Appendix V RTCs RE Nov 2013 Supplemental RI (Click to expand)
-
- TCEQ Comments to Response to Comments to the Supplemental RI Report dated 11/13, July 2014
-
Supplemental Remediation Investigation Report, Former ASARCO Smelter Site, El Paso, Texas, November 2013 (Click to expand)
- Final Supplemental Remedial Investigation Report, November 12, 2013
- Tables, November 12, 2013
-
Figures (Click to expand)
- Fig 1-1 Site Location Map
- Fig 1-2 Land Use
- Fig 1-3 Plant Site Stormwater
- Fig 1-4 Cat I Landfill Material Location
- Fig 1-5 PRB Locations
- Fig 1-6 Diesel 2 Location
- Fig 2-1 Historical Investigation Areas
- Fig 2-2 Assessment Areas
- Fig 3-1 East Mtn AA Supp RI Soil Locs
- Fig 3-2 East Prop AA Supp RI Soil – Test Pit Locs
- Fig 3-3 PBA AA Supp RI Soil Locs
- Fig 3-4 Plant Area IA – Soil Samples
- Fig 3-5 GW Interim Mon Locations
- Fig 3-6 GW Supplemental RI GW Locs
- Fig 3-7 Surface Water Interim Mon Locs
- Fig 4-1 Soil Sample Locations
- Fig 4-2 Antimony Soil Locations East Mtn
- Fig 4-3 Arsenic Soil Locations East Mtn
- Fig 4-4 Lead Soil Locations East Mtn
- Fig 4-5 Mercury Soil Locations East Mtn
- Fig 4-6 Antimony Soil Locations East Prop
- Fig 4-7 Arsenic Soil Locations East Prop 1
- Fig 4-8 Arsenic Soil Locations East Prop 2
- Fig 4-9 Cadmium Soil Locations East Prop 1
- Fig 4-10 Cadmium Soil Locations East Prop 2
- Fig 4-11 Copper Soil Locations East Prop 1
- Fig 4-12 Copper Soil Locations East Prop 2
- Fig 4-13 Lead Soil Locations East Prop 1
- Fig 4-14 Lead Soil Locations East Prop 2
- Fig 4-15 Mercury Soil Locations East Prop
- Fig 4-16 Selenium Soil Locations East Prop 1
- Fig 4-17 Selenium Soil Locations East Prop 2
- Fig 4-18 Antimony Soil Locations PBA
- Fig 4-19 Arsenic Soil Locations PBA 1
- Fig 4-20 Arsenic Soil Locations PBA 2
- Fig 4-21 Cadmium Soil Locations PBA 1
- Fig 4-22 Cadmium Soil Locations PBA 2
- Fig 4-23 Copper Soil Locations PBA 1
- Fig 4-24 Copper Soil Locations PBA 2
- Fig 4-25 Lead Soil Locations PBA 1
- Fig 4-26 Lead Soil Locations PBA 2
- Fig 4-27 Mercury Soil Locations PBA
- Fig 4-28 Arsenic Soil Locations Plant Entrance
- Fig 4-29 Lead Soil Locations Plant Entrance
- Fig 4-30 Arsenic Soil Locations South Terrace
- Fig 4-31 Cadmium Soil Locations South Terrace
- Fig 4-32 Copper Soil Locations South Terrace
- Fig 4-33 Lead Soil Locations South Terrace
- Fig 4-34 Mercury Soil Locations South Terrace
- Fig 4-35 Arsenic Soil Locations Pond 1
- Fig 4-36 Cadmium Soil Locations Pond 1
- Fig 4-37 Lead Soil Locations Pond 1
- Fig 4-38 Mercury Soil Locations Pond 1
- Fig 4-39 Antimony Soil Locations Pond 56
- Fig 4-40 Arsenic Soil Locations Pond 56
- Fig 4-41 Cadmium Soil Locations Pond 56
- Fig 4-42 Lead Soil Locations Pond 56
- Fig 4-43 Mercury Soil Locations Pond 56
- Fig 4-44 Antimony Soil Locations Acid Plant
- Fig 4-45 Arsenic Soil Locations Acid Plant
- Fig 4-46 Cadmium Soil Locations Acid Plant
- Fig 4-47 Lead Soil Locations Acid Plant
- Fig 4-48 Mercury Soil Locations Acid Plant
- Fig 4-49 Arsenic Soil Locations La Calavera
- Fig 4-50 Lead Soil Locations La Calavera
- Fig 4-51 Mercury Soil Locations La Calavera
- Fig 4-52 Arsenic Soil Locations Flood plain
- Fig 4-53 Lead Soil Locations Flood plain
- Fig 4-54 Site Wide Distribution Arsenic
- Fig 4-55 Site Wide Distribution Arsenic
- Fig 4-56 Site Wide Distribution Cadmium
- Fig 4-57 Site Wide Distribution Copper
- Fig 4-58 Site Wide Distribution Lead
- Fig 4-59 Site Wide Distribution Mercury
- Fig 4-60 Site Wide Distribution Selenium
- Fig 4-61 Water Level Contours Fall 2012
- Fig 4-62 Antimony GW Fall 2012
- Fig 4-63 Arsenic GW Fall 2012
- Fig 4-64 Cadmium GW Fall 2012
- Fig 4-65 Chromium 2010 to 2012
- Fig 4-66 Cobalt GW Fall 2012
- Fig 4-67 Copper 2010 to 2012
- Fig 4-68 Fluoride 2010 to 2012
- Fig 4-69 Lead GW Fall 2012
- Fig 4-70 Molybdenum GW Fall 2012
- Fig 4-71 Mercury 2011 to 2012
- Fig 4-72 Nickel 2011 to 2012
- Fig 4-73 Nitrate GW Fall 2011
- Fig 4-74 Selenium GW Fall 2012
- Fig 4-75 Thallium GW Fall 2012
- Fig 4-76 Zinc GW Fall 2012
- Fig 4-77 PB Arroyo Sat Thickness
- Fig 4-78 PBA Bedrock Surface Contour Map
- Fig 4-79 Arsenic SW 2010 to 2012
- Fig 4-80 Chloride SW 2010 to 2012
- Fig 4-81 Iron SW 2010 to 2012
- Fig 4-82 Magnesium SW 2010 to 2012
- Fig 4-83 Nitrate SW 2010 to 2012
- Fig 4-84 Selenium SW 2010 to 2012
- Fig 4-85 Manganese SW 2010 to 2012
-
Appendices (Click to expand)
- Appendix A ENCYCLE Data Review
- Appendix B Hydrogeology Review
- Appendix C Surface Water and Groundwater Interaction
- Appendix D Historical Trend Charts-GW SW Data
- Appendix E Soil Sampling Locations
- Appendix F Soil Analytical Data
- Appendix G Soil Boring-Test Pit-Monitoring Well Construction Logs
- Appendix H Groundwater and Surface Water Sampling Locations
- Appendix I Groundwater and Surface Water Sampling Results
-
Appendix J Laboratory Analytical and Data Usability Reports (Click to expand)
-
J-1 Laboratory Analytical (Click to expand)
- J-2 Data Usability Summary Reports
-
- Appendix K Parker Brothers Arroyo Interim Channel Removals
- Appendix L East Property Information
- Appendix M Fines Pile and Ephemeral Pond Report
- Appendix N Boneyard Report
- Appendix O Interim Data Gap Report–Soil Sampling Sept2011
- Appendix P Interim Data Gap Report-Oct2011 Sampling Event
- Appendix Q HydroGeophysics–Seismic Survey Results
- Appendix R Results of Selective Sequential Extraction
- Appendix S Groundwater Sampling Method Comparison
- Appendix T Historical Slag Assessment
- Appendix U COC Distribution in Groundwater
-
Final Remedial Action Work Plan, April 2011 (Click to expand)
- Agency Approval Letter, April 21, 2011
- Final Remedial Action Work Plan, April 2011
Large file, 45 MB – Right-click and save to your desktop to avoid browser crashes.
- Remedial Investigation Documents – On TCEQ’s website (Reports created prior to the Site Trustee)
- El Paso Remedial Design Report, by Hydrometrics, Inc., November 2001 – Part I (Report created prior to the Site Trustee)
- El Paso Remedial Design Report, by Hydrometrics, Inc., November 2001 – Part II (Report created prior to the Site Trustee)
Reports
- Remediation of the Former ASARCO Smelter Site, El Paso, Texas, USA, May 28, 2020
- TCEQ Acknowledgment of Receipt and Concurrence to Proceed regarding “IBWC Site Access and American Canal Extraction Soil Import – Update” (dated October 15, 2018), October 16, 2018
- TCEQ Approval of Texas Custodial Trust 2016 Annual Report (dated May 10, 2017), August 3, 2017
- TCEQ Approval of the Request for Schedule Extension to Finalize and Record ICs, June 1, 2017
- TCEQ Approval of ASARCO 2016 Soil Response Action Completion Report, April 25, 2017
-
ASARCO 2016 Soil Response Action Completion Report, March 6, 2017(Click to expand)
-
Text (Click to expand)
-
Attachments (Click to expand)
- Att 1A Maps Cross_SectionsCombined
- Att 1B Graphs
- Att 1C TOC_w_cover
- Att 1C.1.1 01 CoverandFlyGabInsEastMtnAA
- Att 1C.1.1 02 Fig 11 StormwtrCntrlSmmry_EditedToShowBasin12Gabions
- Att 1C.1.1 03 East Mtn Gabion Photo Log 1 (Basins 2, 3, 4 and 6)
- Att 1C.1.1 04 East Mtn Gabion Photo Log 2 (Basin 12)
- Att 1C.2 Flysheet East Property Intro
- Att 1C.2.1 01 CoverandFlysheet EastPropCat I_II Rem
- Att 1C.2.1 02 L.RP.Approval.ScreeningLevelsEastPropCat_I_II_III_ExcavRemoval Apr182014
- Att 1C.2.1 03 Table 1 final Area 4
- Att 1C.2.1 04 Table 2 final Cat II Stockpile
- Att 1C.2.1 05 Table 3 final Cat II Removal Area
- Att 1C.2.1 06 Table 4 Se Area
- Att 1C.2.1 07 Fig 1 East Property
- Att 1C.2.1 08 Fig 2 Area 4 EastSide Category I
- Att 1C.2.1 09 Fig 3 Cat II Stockpile
- Att 1C.2.1 10 Fig 4 Cat II Removal Area
- Att 1C.2.1 11 Fig 5 Se_Removal_Area
- Att 1C.2.2 01 CovandFlysheet-CatIIStockpile
- Att 1C.2.2 02 L.RP.AppvlRTCPlantSiteCoverSystem081715
- Att 1C.2.2 03 L.EW.PlantSiteCoverSubmittalApr082015
- Att 1C.2.2 04 L.EW.RTCPltCovTextTblsFigs072315
- Att 1C.2.2 05 CATIIStockCQAStampedCombined
- Att 1C.2.3 01 CoverandFlysheet EBS
- Att 1C.2.3 02 L.JS.EastBorrowSourceSamplingLetterFnl12.07.12
- Att 1C.2.3 03 L.SB.Appvl.EBSSampProc&Cat_I_LFRmvlPlnDec102012
- Att 1C.2.4 01 CoverandFlysheetGHB
- Att 1C.2.4 02 TCEQ Approval GHB 02252015
- Att 1C.2.4 03 E-mail.EW.TPDES Remediation Summary 2.23.17
- Att 1C.2.4 04 EP-163 Boring Log_final
- Att 1C.2.4 05 RAP Fig 12 PRBGHBFacilityMap
- Att 1C.3 01 CoverandFly sheet-PlantEntrance
- Att 1C.3 02 Table 1 Plant Entrance
- Att 1C.3 03 Fig 1 PlantEntrance_AffectedSoilExcavation
- Att 1C.4 01 CoverandFlysheet-Intro_Plant Site AAs
- Att 1C.4.1 01 CoverandFlysheet-PCB Removal
- Att 1C.4.1 02 Table 1 PCB Results 20170306
- Att 1C.4.1 03 L.RP.NTP.ExcavationsDisposalSoilPowerhouse(AE11)PCB Oct212014
- Att 1C.4.1 04 Fig_1_PCB_Confirmation_Sample_Locations_v2
- Att 1C.4.1 05 disposal manifests
- Att 1C.4.2 01 CovrFlysheetBasement backfill
- Att 1C.4.2 02 RAP Att 2A_15 L.EW.PlantSiteCoverSubmittalApr2015
- Att 1C.4.2 03 L.RP.Approval.PlantSiteCoverImprovePlan_&_Comments.PlantSiteETCovers May222015
- Att 1C.4.2 04 BasementCQAReportStampedCombined
- Att 1C.4.3 01 Cover fly sheet Cell 3 cover
- Att 1C.4.3 02 RP.Apprvl.CnstrctnStts&DC_Cell3CvrSyst02192014
- Att 1C.4.3 03 L.RP.Apprvl.CQARpt_Cell3CvrSystRecnst May132015
-
Att-1C.4.3-04-Cell-3-CQA-Report (Click to expand)
- 1 Cell3 CQA Report Text Sealed
- 2Table 1 & 2 Field and Soils Lab Test Results_050814 (2)
- 3a Fig 1 Site Vicinity Map
- 3b Fig 2 X-Section
- App A – Oct 10, 2013 Letter to TCEQ
- App B Design Changes Clarifications Letters COMBINED
- App C – Representative Project Photos
- App D – Geotechnical lab Test Results
- App E – Geosynthetics Installers Resumes
- App F – Cert of Acceptance of Subgrade
- App G – GCL Manufacturer QC Documents
- App H – GCL Conformance Test Results
- App I – HDPE Manufacturer QC Documents
- App J – HDPE CQA Documents
- App K – LLDPE Manufacturer QC Documents
- App L – LLDPE Conformance Test Results
- App M – LLDPE CQA Documents
- App N – Nonwoven Geotextile Manufacturer QC Documents
- App O – Nonwoven Geotextile Conformance Test Results
- App P Record Drawings Combined
- Att 1C.4.4 01 Cover fly sheet – utilities abandonment
- Att 1C.4.4 02 L.EW.PlSiUtilAbandDrawingsTCEQ Submittal Mar31 2015
- Att 1C.4.4 03 L.P.ConcurrToProceed.PlantSiteUtilAbandtExpedRevReq Apr022015
- Att 1C.4.4 04 CQAUtilAbanCombStamped
- Att 1C.4.5a 01 CoverandFlysheet Subgrade
- Att 1C.4.5a 02 LtrCatIIPlacementPlan_withoutAtt07.30.2012
- Att 1C.4.5a 03 L.EW.PlantSiteCoverImpPlans 4.21.15
- Att 1C.4.5a 04 TCEQAppvPlntSiteCvrImprovPlns052215
- Att 1C.4.5a 05 CQASubgradeCombinedStamped
- Att 1C.4.5b 01 CoverFlysheet_PlantSiteCover
- Att 1C.4.5b 02 TCEQAppvPlntSiteCoverImprvtPlans052215
- Att 1C.4.5b 03 TCEQAppvlRTCPlantSiteCoverSystem081715
- Att 1C.4.5b 04 TablesCombined
- Att 1C.4.5b 05 Dwg C-7 NPad&BoneyardFinalGradingPlan
- Att 1C.4.5b 06 Dwg C-8 South Pad Final Grading Plan
- Att 1C.4.5b 07 Dwg C-18 N Pad CQA Control Pts
- Att 1C.4.5b 08 PhotoLog_Final Cover
- Att 1C.4.6 01 CoverandFlysheet SolidWastNOR
- Att 1C.4.6 02 Table 1 NOR data
- Att 1C.4.6 03 Figure 1 NOR unit locations
- Att 1C.5 01 flysheet-fmrSbProcBldng_StorageYd20170306
- Att 1C.5 02 Table 1 Storage Yard – Rev1 3-23-17
- Att 1C.5 03 Table 2_Outlier Dixon Test Result
- Att 1C.5 04 Fig_1_Storage_Yard_Confirmation_Sample_Locations
- Att 1C.6 01 CvrFlyFigPBAAACombined
- Att 1C.6.1 01 CoverAndFlyLPBA Cat II Removal
- Att 1C.6.1 02 L.SB.Approval.InterimChannelSoilRemovalPBA Dec052011
- Att 1C.6.2 01 Cell 4 CoverFlysheet Cell 4
- Att 1C.6.2 02 TCEQ Approval Liner Installation 2013.03.28
- Att 1C.6.2 03 L.RP.Apprvl.CatICell4CQA(06112013)CQAAdd1(07032013)CQAAdd2(07162013)Aug072013
- Att 1C.6.2 04 L.RP.Approval.RTC_Cat_I_LF_Cell4FinalCoverDesign_&_SuppRTC Jan212015
- Att 1C.6.3 01 CoverandFlysheet LPBA Channel Const
- Att 1C.6.3 02 L.RP.NTP.PBAInterimChannelDesignRev3 Feb192014
- Att 1C.6.3 03 LPBA CQA Report CombinedStamped
- Att 1C.6.3 04 Fig C-2 Overall Site Plan
- Att 1C.6.3 05 Lower PBA Outlet PhotoLog
- Att 1C.6.4 01 CoverandFlysheet UPBA FnsPileEphPondTriangle
- Att 1C.6.4 02 Fig 1_Parker_Brothers_Arroyo_Features
- Att 1C.6.4 03 L.EW.CLOMRAppJuly2014
- Att 1C.6.4 04 L.RP.NTP.UPBA_FinesPileEphemPondTriangle Aug212014
- Att 1C.6.4 05 L.EW.UPBAConstrDrawBrochOct2015
- Att 1C.6.4 06 L.RP.NTP.UpdtdSubmtUPBA_FnsPileEphPondTriangOct282015
- Att 1C.6.4 07 L-EW-PaiOutRRChanDC1and204-06-16
- Att 1C.6.4 08 L-EW-UpPBChFinLtrDCFigsMay162016
- Att 1C.6.4 09 L.RP.Appvl_NTP_PBAModNo3_PBA_Chnnl_FnsPile.Jun012016
- Att 1C.6.4 10 L.RP.Apprvl.FnlRptRskRdctnParcel13ClosureRpt-03-28-16
- Att 1C.6.4 11a ClosureRptParcel13TblsFigsAppMarch 2016_App D in separate file
- Att 1C.6.4 11b ClosureRptParcel13AppDLabRepCombined
- Att 1C.6.4 12a Tbl 1aFinesPileDensRes
- Att 1C.6.4 12b Tbl 1bFinesPileDensRes
- Att 1C.6.4 13 Tbl 2_FinesPileCoverLabRes
- Att 1C.6.4 14 Tbl 3_FinesPileETCoverCQAControlPoints
- Att 1C.6.4 15 Fig 1 Fines Pile CQA Control Points Figure
- Att 1C.6.4 16 Fig 2 As-Built Upper PBA 20170228
- Att 1C.6.4 17 Fig 3 As-Built Triangle Area 20170228
- Att 1C.6.4 18 PhotoLog Fines PileUPBA
- Att 1C.6.4 19 PhotoLog Triangle Area
- Att 1C.6.4 20 PhotoLog LPBA Outlet
- Att 1C.6.5 01 CovandFlysheet TCT Pile 1
- Att 1C.6.5 02 L.RP.NtfctnOfSlagMatlRmvl.TCTPile1.April132016
- Att 1C.6.5 03 Table 1. TCT Pile 1 Area
- Att 1C.6.5 04 Figure EXHIBIT IH_modified_Ltr.EW.April062016
- Att 1C.6.5 05 Pile 1 Slag Photo Log
- Att 1C.6.5 06 TCTPile1CQARptStampedCombined
- Att 1C.6.6 01 CoverandFlysheet PRBs
- Att 1C.6.6 02 L.RP.Approval.Class V injection wells.CalciteRemoval.PRBs.Oct172014
- Att 1C.6.6 03 L.RP.Apprvl-RTCs_Field Demnsttn-Jan-2014-ZVI-PBA-Status-Rpt.Dec162014
- Att 1C.6.6 04 L.RP.Apprvl.FldDemZVI_TTPBAStatRpt_IntrmMonDec2013-Jun2014 Mar022015
- Att 1C.6.6 05 TCEQ Approval of Modified PRB Sampling Schedule Feb 2016
- Att 1C.6.6 06 TCEQ Approval of Modification of 2nd Sampling Event Dec 2016
- Att 1C.6.6 07 Fig 12 PRBGHBFacilityMap
- Att 1C.7 01 Cover and Flysheet-LaCalavera_NorthOfCemetery
- Att 1C.7 02 Table 1 west of cemetery ead
- Att 1C.7 03 Table 2 near Parcel 13 ead
- Att 1C.7 04 Fig 1 CemeteryAreaFinesPile_Excavation
- Att 1C.8.1 01 CoverandFlysheet Floodplain
- Att 1C.8.1 02 Floodplain Revised Table from RAP App 2.2
- Att 1C.8.1 03 Fig_1_Floodplain_Confirmation_Sample_Locations
- Att 1C.8.1 04 Floodplain BMP Installation Photo Log
- Att 1C.8.2 01 CoverandFlysheet WestSliver
- Att 1C.8.3 01 CoverandFlysheet EastSliverPaisano
- Att 1C.9 01 CoverandFlysheet PandAWells
- Att 1C.9 02 L.RP.Apprvl.PandAMWMay052015_RqstIncludeEP-86ForPandAJun022015
- Att 1C.9 03 L.EW.P&APlantSiteLtrRptTblFigAtt report 012116
- Att 1C.9 04 Ltr.EWehner.P&ARequestTblsFigs request 012116
- Att 1C.9 05 L.RP.Appvl_01_21_16-Request-to-Plug-and-Abandon-wells
- Att 1C.9 06 L.RP.AcknwldgmtRcpt_Final-plugging-rpts-1_21_16
- Att 1C.10 CovAndPlann2017ActSch
- Att 2A Fig 2A PMZ
-
Appendices (Click to expand)
-
- TCEQ Approval of “Response to TCEQ May 11, 2016 Comment Letter,” (dated October 7, 2016), Texas Custodial Trust 2015 Annual Report, (dated February 22, 2016), December 28, 2016
- TCEQ Approval of Revised Response Action Plan (dated August 16, 2016), December 27, 2016
- Comments to Revised Response Action Plan (dated August 16, 2016), September 19, 2016
-
Texas Custodial Trust Response Action Plan (RAP), Former ASARCO Smelter Site, El Paso, TX, August 16, 2016 (Click to expand)
- Cover Page
- Executive Summary
- Checklist for Report Completeness
-
Worksheets (Click to expand)
- Figures
-
Attachments (Click to expand)
- Attachment 1A – Maps and Cross Sections
- Attachment 1B – Graphs of Concentration versus Time
-
Attachment 2A (Click to expand)
- Attachment 2A_1 – CAT-1-LF DESIGN-DWGS-ASARCO-compiled
- Attachment 2A_1 – CombinedLtrAttHydrus3DAnalysis
- Attachment 2A_1 – Grid_PB_Landfill
- Attachment 2A_2 Ltr EWehnerTCEQCell3Ltr10102013
- Attachment 2A_2Cell 1 & 2
- Attachment 2A_2Cell 3 CombinedTextFigExhib
- Attachment 2A_2Cell 3
- Attachment 2A_3 Lower Channel Excavation ImpactedSoilsLetter11212011-FINAL
- Attachment 2A_3 LtrEWPBARev3CLOMRSheets
- Attachment 2A_4r1 Fig 2 PlantSiteCatIAreas
- Attachment 2A_5.1 East Cat I EastPropertyExcavationWPCombined
- Attachment 2A_5.2 NorthAndEastPropertyExcavationAreas
- Attachment 2A_5.3 EastProperty_090214_XRF
- Attachment 2A_6 LtrEW.EastProCatIIFigs
- Attachment 2A_6East Property Stockpile TCEQ NTP(formerly ATT2A13)
- Attachment 2A_7 L-EW-RTCCell4FinalCoverSubmittal-10-2-14
- Attachment 2A_8 – Area 12 Confirmation Location Sampling
- Attachment 2A_8 – Area 12
- Attachment 2A_8 – Area 12B
- Attachment 2A_9 CemeteryAreaFinesPile_Excavation (4)
- Attachment 2A_9 NorthOfCemetery figure
- Attachment 2A_10 Intentionally Blank
- Attachment 2A_11 UPDATE BOB Final PRB Report 201204
- Attachment 2A_12 East Property Groundwater Hydraulic Barrier Design
- Attachment 2A_13 Intentionally Blank
- Attachment 2A_14 – L.EW.PlSiUtilAbandDrawingsTCEQ Submittal
- Attachment 2A_15 – Plant Site Cover L.EW.LetterFigures
- Attachment 2A_15 CAT II Placement Drawings2
- Attachment 2A_16 UPPER PARKER BRO. REV 0 SIGNED SET
- Attachment 2A_17 1209-BMP Exh FIG1
- Attachment 2A_17 10091401
- Attachment 2A_17 BMP-ChkDam Spacing
- Attachment 2A_17 BMP-Inlet Protection
- Attachment 2A_17 East Mtn gabion photo log 1
- Attachment 2A_17 East Mtn gabion photo log 2
- Attachment 2A_17 EQ-ANSI D – 22×34 Aug 13
- Attachment 2A_17 Gabion map
- Attachment 2A_17 PennzSuppressD-8-7-121
- Attachment 2A_17 TerrapaveIntntnlTop-Seal White
- Attachment 2A_18 Pile 1 L.EW.NoReCovActPile1TblFigs
- Attachment 2A_19 Fnl PRBFieldDemoStatusReportNov2014
- Attachment 2A_20 L.EW.WestPaisSliverRptAttachments
- CP – Attachment 2A
- Attachment 2B – Proposed Well Design
- Attachment 2D – Plume Management Zone Map
- Attachment 2E – Attenuation Action Levels Determination
- Attachment 3A – Map of Monitoring and Sampling Points
- Attachment 4A – Map of Confirmation Sampling Points
- Attachment 5A – Map of PRAC Monitoring and Sampling Points
- Attachment 5B – PRAC Costs
-
Appendices (Click to expand)
- Appendix 1 – References
- Appendix 2 – Data Tables and Boring Logs
-
Appendix 3-1 – Dust Monitoring Rpts (Click to expand)
-
Appendix 3-2 – Annual GW SW Rpts (Click to expand)
-
Appendix 3-3 – PCB Rpts (Click to expand)
-
Appendix 3-4 – Discharge Monitoring Rpts (Click to expand)
- Appendix 3-5 – NOR Unit Closure Report
-
Appendix 3-6 – Groundwater Flux (Click to expand)
- Appendix 3-7 – GeosyntecApr2015
-
Appendix 3-8 – Field Demo ZVI Tech PRB Report (Click to expand)
-
Appendix 3-9 – Groundwater time to cleanup model (Click to expand)
- Appendix 4 – Slipsheet
- Appendix 5 – Land Owner Concurrence
- Appendix 7 – Statistical Methodology
- TCEQ Approval of the Revised Final Conceptual Site Model, Pathway Evaluation, and Protective Concentration Level Report (dated July 14, 2016), and Acknowledgment of Notice of Intent to Switch to Texas Risk Reduction Program (NOIST, TCEQ Form 10337 (dated April 13, 2016), August 3, 2016
-
Revised Final Conceptual Site Model, Pathway Evaluation and Protective Concentration Level Report, July 2016 (Click to expand)
- Final TRRP Bridge Report, July 2016
-
Appendices (Click to expand)
- Appendix A_APAR Checklist
- Appendix B_Historical Data Summaries
- Appendix C_NRCS Soil Survey
- Appendix D_Site Soil Sample pH Data
- Appendix E SW Flow Data
- Appendix F DMRsFigTCEQRptCombined
- Appendix G_Geologic Cross Sections
- Appendix H FluxMemoFigsAttach
- Appendix I_TCEQ Memorandum
- Appendix J_TX Water Well Report
- Appendix K_Receptor Survey Photolog
- Appendix L_Tier I Exclusion Checklist
- Appendix M Addendum Tier2ScreenLevelEcoRiAssCom
- Appendix M Tier2ScreeningLevelEcoRiAssCombined
- Appendix N GWDischWeighConcen
- Appendix O_BackgroundMetals.Revisedxlsx
- Appendix P Tier 2 Soil to GW
- Appendix Q_Acute and Chronic Surface Water Criteria
- Appendix R_2006 Tier 1 Recreational Sediment PCLs
- TCEQ Comments to Revised Conceptual Site Model, Pathway Evaluation, and Protective Concentration Level Report (dated April 11, 2016), June 2, 2016
- Acceptance of Deed Certification – Risk Reduction Standard No. 3, TCEQ Receipt of Proof of Filing Materials for Parcel 13 (dated May 13, 2016), May 20, 2016
- TCEQ Comments to Texas Custodial Trust 2015 Annual Report (received February 22, 2016), May 11, 2016
- TCEQ Approval of Final Report – Risk Reduction Standard No. 3 Closure Report of Parcel 13 (dated March 22, 2016), March 28, 2016
- Closure Report Parcel 13, March 22, 2016
- Response Action Plan Former ASARCO Smelter Site, El Paso, Texas, October 2015
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Conceptual Site Model, Pathway Evaluation and Protective Concentration Level Report – December 17, 2014 (Click to expand)
- Submittal Letter
- Report
- Tables
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Figures (Click to expand)
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Appendices (Click to expand)
- Appendix A – APAR Checklist
- Appendix B – Historical Data Summaries
- Appendix C – NRCS Soil Survey
- Appendix D – Site Soil Sample pH Data
- Appendix E – Geologic Cross Sections
- Appendix F – TCEQ Memorandum
- Appendix G – TX Water Well Report
- Appendix H – Receptor Survey Photolog
- Appendix I – Tier I Exclusion Checklist
- Appendix J – Tier 2 SLERA
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Category 1 Landfill (Click to expand)
- Acknowledgement of Receipt and Notice to Proceed: Work Plan Removal of Cat I and II Materials-TXDOT Property, October 2015
- TCEQ Letter regarding Approval of Construction Quality Assurance Report Category I Landfill – Cell 3 Cover System Reconstruction, dated April 2015, May 13, 2015
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Construction Quality Assurance Report Category I Landfill – Cell 3 Cover System Reconstruction, April 2015 (Click to expand)
- Report
- Tables
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Figures (Click to expand)
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Appendices (Click to expand)
- App A – Oct 10, 2013 Letter to TCEQ
- App B – Design Changes Clarifications Letters COMBINED
- App C – Representative Project Photos
- App D – Geotechnical lab Test Results
- App E – Geosynthetics Installers Resumes
- App F – Cert of Acceptance of Subgrade
- App G – GCL Manufacturer QC Documents
- App H – GCL Conformance Test Results
- App I – HDPE Manufacturer QC Documents
- App J – HDPE CQA Documents
- App K – LLDPE Manufacturer QC Documents
- App L – LLDPE Conformance Test Results
- App M – LLDPE CQA Documents
- App N – Nonwoven Geotextile Manufacturer QC Documents
- App O – Nonwoven Geotextile Conformance Test Results
- App P – Record Drawings Combined
- Approval 31235 Cell 4 Cover Design, January 21, 2015
- Response to TCEQ/EPA Comments on Cell 4 Final Cover Design, 10/2/14
- TCEQ/EPA Review of Response to EPA Comments on Category 1 Landfill, Cell 4 Final Cover Design, dated June 24, 2014 – August 15, 2014
- Response to the 2/21/12 EPA Comments on Category I Landfill, Cell 4 Final Cover Design, June 24, 2014
- TCEQ Approval of Proposed Screening Levels for the East Property Category I, II, and III Material Excavations and Removals, April 18, 2014
- Proposed Screening Levels for the East Property Category I, II, and III Material Excavations and Removals, February 19, 2014
- TCEQ/EPA acknowledgement letter to proceed with the East Property Category II and III Materials Stockpile, Feb 5, 2014
- Trustee Letter – Location of Category II/III Stockpile on East Property, January 23, 2014
- Category I Landfill – Cell 4 CQA Certification Report Addendum 3-Geomembrane Repair, December 10, 2013
- TCEQ Approval of Proposed Cell 3 Cover System, October 28, 2013
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Final Landfill Package – Response to EPA Comments, Former ASARCO Site, July 3, 2012 (Click to expand)
- East Borrow Source Confirmation Sampling Results Memo, June 4, 2013
- 12/6/11 Hydraulic Spill, Response Action Letter – January 11, 2012
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Cell 4 Design Documents (Click to expand)
- Approval of Cell 4 CQA Certification Report and Addendums, August 7, 2013
- TCEQ Approval of Limits of the Floodplain in PBA and Cell 4, June 14, 2013
- Perimeter Air Monitoring Plan for the Category I, Cell 4 Landfill, June 12, 2013
- TCEQ Approval on Liner System Installation for Category I Landfill – Cell 4 Former ASARCO Smelter Site, El Paso, Texas, March 28, 2013
- Cell 4 Operation and Monitoring Procedures, March 27, 2013
- ASARCO Landfill Cell #4 – 3D Modeling Submittal, March 27, 2013
- Approved Permits: Grading permit for the Phase 2 area (area in the flood plain) of Parker Brothers Arroyo, July 26, 2012
- Design Drawings Asarco Landfill Final, December 2011
- Approved Permits: Storm Water and Grading, November 20, 2011
- TCEQ approval letter for 1.) Initial base grading for the base of Category I landfill – Cell 4, 9/1/11 and 2.) Material Specifications and Construction Quality Assurance Plan, 9/9/11, October 6, 2011
- Endangered Species Act (ESA) Package, September 15, 2011 (US Fish and Wildlife Service has concurred that no additional consultations are required for federally listed Threatened and Endangered species)
- Category I Landfill, Cell 4 Material Specifications and Construction Quality Assurance Plan, September 9, 2011
- Cover Letter Submittal, September 1, 2011
- Final Cover Erosion Analysis, August 26, 2011
- Slope Stability Analysis, August 4, 2011
- Appendix 3 – Category I Landfill, Cell 4 Area Hydrogeologic Evaluation, August 2011
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Construction Progress Reports (Click to expand)
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2013 (Click to expand)
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2012 (Click to expand)
- December 27, 2012
- December 18, 2012
- December 11, 2012
- December 4, 2012
- November 20, 2012
- November 13, 2012
- November 6, 2012
- October 30, 2012
- October 23, 2012
- October 16, 2012
- October 9, 2012
- September 11, 2012
- September 4, 2012
- August 28, 2012
- August 22, 2012
- August 15, 2012
- August 8, 2012
- August 1, 2012
- July 25, 2012
- July 18, 2012
- July 3, 2012
- June 27, 2012
- June 20, 2012
- June 13, 2012
- June 6, 2012
- May 30, 2012
- May 23, 2012
- May 16, 2012
- May 9, 2012
- May 2, 2012
- April 24, 2012
- April 17, 2012
- April 9, 2012
- March 29, 2012
- March 22, 2012
- March 13, 2012
- March 6, 2012
- February 28, 2012
- February 22, 2012
- February 15, 2012
- February 7, 2012
- February 1, 2012
- January 24, 2012
- January 18, 2012
- January 11, 2012
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2011 (Click to expand)
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- Closeout Report for American Canal Clean-up, May 2014
- Location of Category II/III Stockpile on East Property, January 23, 2014
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Site Closure (Click to expand)
- East 140 Investigation Work Plan – July 2012
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Interim Data Gap Reports (Click to expand)
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Ambient Air Monitoring Plan, November 2011 (Click to expand)
- Review of ASARCO El Paso Smelting Processes, October 2010
Storm Water Discharge Results
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2015 (Click to expand)
2015 Discharge Monitoring Report
The plant received approximately 12.77 inches of rain in 2015. The volume stored at the end of 2015 in Pond A and B was approximately 500,000 gallons of stormwater. The entire stormwater system can hold approximately 12 million gallons of water. Stormwater is also sampled, when present, in Parker Brothers Arroyo. Based on site history, the amount of rainfall required to generate stormwater flow in Parker Brothers Arroyo is approximately 0.50 inches of rainfall in a short period of time. In July 2015, a rain event of 0.96 inches was recorded and a stormwater sample was taken from the effluent of Parker Brothers Arroyo at SW-5. The results meet the Daily Maximum discharge limits of the SWP3 permit.
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2014 (Click to expand)
2014 Discharge Monitoring Report
The plant received approximately 9.40 inches of rain in 2014. The volume stored at the end of 2014 in Pond A and B was approximately 1,000,000 gallons of storm water. The entire storm water system can hold approximately 12 million gallons of water. On October 20, 2014, The Texas Custodial Trust began discharging water from Pond A and B to the permitted outfall (SW-5). The water had been analyzed and compared to the numeric effluent limitations and meets the discharge requirements of stormwater to inland waters in the Site’s SWP3 permit. In addition to the storm water stored onsite, storm water is also sampled, when present, in Parker Brothers Arroyo. Based on site history, the amount of rainfall required to generate storm water flow in Parker Brothers Arroyo is approximately 0.50 inches of rainfall in a short period of time. In July 2014, a rain event of 0.32 inches was recorded and a stormwater sample was taken from the effluent of Parker Brothers Arroyo at SW-5. The results meet the Daily Maximum discharge limits of the SWP3 permit.
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2013 (Click to expand)
2013 Discharge Monitoring Report
The plant received ~9.16 inches of rain in 2013. The volume stored at the end of 2013 in Pond A was approximately 800,000 gallons of storm water. The entire storm water system can hold approximately 12 million gallons of water. There were no discharges of stormwater from Pond A of the storm water system in 2013. In addition to the storm water stored onsite, storm water is also sampled, when present, in Parker Brothers Arroyo. Based on site history, the amount of rainfall required to generate storm water flow in Parker Brothers Arroyo is approximately 0.25 inches of rainfall in a short period of time. In July 2013, a rain event of 0.38 inches was recorded and a stormwater sample was taken from the effluent of Parker Brothers Arroyo at SW-5. The results meet the Daily Maximum discharge limits.
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2012 (Click to expand)
2012 Discharge Monitoring Report
The plant site received ~4.62 inches of rain in 2012. The volume stored at the end of 2012 was the same as at the end of 21011. Approximately 500,000 gallons of storm water is stored in the lined ponds on the plant site. The storm water is currently contained in Pond A of the storm water system. The entire storm water system can hold approximately 12 million gallons of water. Since the ponds are less than 10 percent of capacity, there are currently no plans to discharge the storm water. If the water is discharged to the storm water system, an analytical sample will be collected and analyzed prior to discharge to ensure the water meets the TPDES Multi-Section General Permit discharge limits.
In addition to the storm water stored onsite, storm water is also sampled, when present, in Parker Brothers Arroyo. Based on site history, the amount of rainfall required to generate storm water flow in Parker Brothers Arroyo is approximately 0.25 inches of rainfall in a short period of time. In January 2012, a rain event of 0.31 inches was recorded and a stormwater sample was taken from the effluent of Parker Brothers Arroyo at SW-5. The results meet the Daily Maximum discharge limits.
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2011 (Click to expand)
The plant site has received ~1.9 inches of rain to date this year, with a maximum daily amount of 0.16 inches of rain observed in July. This rainfall has generated approximately 500,000 gallons of storm water collected in lined ponds on the plant site. The storm water is currently contained in Pond A of the storm water system. The storm water system can hold approximately 8 million gallons of water. The Trust is currently evaluating if the water is suitable for reuse on site for dust suppression. Since the ponds are approximately 10 percent of capacity, there are currently no plans to discharge the storm water. If the water is discharged to the storm water system, an analytical sample will be collected and analyzed prior to discharge to ensure the water meets the discharge limits.
In addition to the storm water stored onsite, storm water is also sampled, when present, in Parker Brothers Arroyo. Based on site history, the amount of rainfall required to generate storm water flow in Parker Brothers Arroyo is approximately 0.25 inches of rainfall in a short period of time. Based on the rainfall totals observed onsite this year, a daily maximum of 0.16 inches, and confirmed with visual observation, no storm water flow has been generated in Parker Brothers Arroyo; therefore, no storm water sample has been collected. When storm water samples are collected on site the results will be posted.
- July 26, 2010
- February 16, 2010