The Kingsland state Superfund site consists of two separate groundwater contamination plumes. One is in the vicinity of the 2100 block of FM 1431; the second is in the vicinity of the 2400 block of FM 1431 in Llano County. There are several possible sources of releases, including current and former businesses along Farm Road 1431. Release of hazardous substances, including organic solvents, into groundwater is the major concern at the site.
Superfund Actions Taken to Date
- December 2, 1996, a hazard ranking system (HRS) documentation record was prepared for the Kingsland site.
- July 31, 1998, a legal notice was published in the Texas Register (24 TexReg 7927) describing the site and proposing the site for listing on the state Superfund registry. A public meeting to receive citizen comments was to be held at the Kingsland Community Center on September 22, 1998.
- September 22, 1998, a public meeting was held at the community center in Kingsland to receive community comments on the proposal of the Kingsland contamination plume to the state registry of state Superfund sites.
- May 28, 1999, remedial investigation / feasibility study under way.
- September 2, 1999, a community relations plan was prepared for the Kingsland site.
- September 29, 1999, the TNRCC project manager interpreted well test results to identify two separate groundwater contamination plumes. One is in the vicinity of the 2100 block of FM 1431; the second is in the vicinity of the 2400 block of FM 1431.
- November 8, 1999, the final report was approved, marking completion of the remedial investigation phase.
- December 10, 1999, TNRCC accepted final baseline risk assessment report.
- October 11, 2000, TNRCC approved the work order to perform the preferred soil
remedy pilot study, which initiated the feasibility study phase at the site.
- January 13, 2000, an affidavit of lien payable to the commission was filed in the Llano County real property records against two properties that were determined to be the source of the contamination. The lien was filed pursuant to the Texas Solid Waste Disposal Act, Texas Health and Safety Code §361.194, to recover the state's portion of costs associated with site activities to date.
- May 2, 2001, TNRCC issued a work order to the contractor to start the soil vapor extraction pilot study.
- September 13, 2001, TNRCC issued a work order to the state contractor to initiate
the first stages of design of a groundwater treatment system.
- June 25, 2002, TNRCC issued a pre–feasibility study work order to the contractor to review the existing site records, prepare and submit a technical memorandum identifying the additional requirements needed to conduct a feasibility study.
- August 22, 2002, a technical memorandum was received from the consultant that identified the additional requirements to conduct a feasibility study.
- September 1, 2002, effective date of the name change from Texas Natural Resource Conservation Commission (TNRCC) to Texas Commission on Environmental Quality (TCEQ).
- October 2002, TCEQ approved a plan for additional investigation needed at the site. The plan activities would include magnetometry and ground penetrating radar survey to identify the presence of underground storage tanks, soil sampling to delineate the groundwater contaminant plume, sampling of 15 existing water wells, and installation of three monitor wells. The water well owners were contacted by telephone regarding the sampling of their wells.
- November-December 2002, TCEQ's contractor performed the field work outlined in the plan that was approved in October. The activities produced enough data for a feasibility study.
- January 15, 2003, TCEQ issued a work order to the contractor to conduct a feasibility study for remediation of the groundwater contamination.
- February 15, 2003, the contractor completed a survey of the sampling locations and the monitor wells.
- April 15, 2003, the final technical memorandum report for the remedial investigation was received and approved by TCEQ.
- May 15, 2003, TCEQ accepted a work plan from the contractor for the pilot study for chemical oxidant injection to treat the PCE-contaminated shallow groundwater plume. Another round of groundwater sampling was completed and the pilot test was started.
- October 2004, a work order was issued for preparation of a conceptual site model to support the ground water cleanup decision for the site. The purpose of the conceptual site model is to present, in a report, a simplified version of the complex geology that underlies the Kingsland site.
- November 2004, a door-to-door survey of private wells in the area around the site was performed.
- March 2005, TCEQ identified and coordinated surface water hookups for five residences in the known groundwater plume area.
- April 2005, TCEQ received and approved the report of the first phase of the conceptual site model.
- August 2005, the contractor conducted a groundwater sampling event. Several private wells were converted to monitor wells.
- December 2005, TCEQ mailed the analytical results of the August groundwater sampling event to the well owners . The contractor submitted a field activities report summarizing the August sampling event and field activities.
- March 2006, a work order was issued to provide for water hook-up support, conduct groundwater sampling and prepare sampling, safety and pre-feasibility reports.
- April-May 2006, the contractor submitted sampling, safety and pre-feasibility reports.
- August 2006, the TCEQ contractor conducted a groundwater sampling event.
- October 2006, the TCEQ contractor submitted sampling data and groundwater monitoring reports for review.
- July 13, 2009, the TCEQ contractor took soil gas samples to help identify the most effective locations to place additional monitor wells in the future.