Project Spotlight: Former Oil & Gas Exploration and Production Site in Rockport, Texas



Project Description: Due Diligence and Remediation of Residential Subdivision Development

Property Type: Former Oil & Gas Exploration and Production Site

Location: Rockport, Texas

Duration: 18 Months


Prior to the real estate closing, CRG Texas was contracted by the prospective purchaser of the property to conduct Phase I and II environmental site assessments (ESAs), and to prepare estimates for additional assessment, corrective action, and regulatory agency reporting.

Following the real estate closing, CRG Texas was contracted to provide environmental consulting services to include:

  • Railroad Commission of Texas (RRC) Voluntary Cleanup Program (VCP) Applications and Corrective Action Plan (CAP)
  • Soil and Groundwater Remediation, Assessment, and RRC Reporting
  • VCP Certification of Completion and Restrictive Covenant Filings


  • Former Oil & Gas Site Redevelopment for Residential Land Use

Problem or initial situation-

  • Areas of suspected concern were identified during the Phase I ESA, and impacted soil and groundwater was confirmed during Phase II ESA work.

Method (service)-

  • Historical and regulatory agency research led to the identification of three former waste pits, one tank battery, and two plugged oil & gas wells at the site. Those areas were investigated through soil and groundwater sampling and laboratory chemical analysis.

CRG Texas Solution-

  • Site was entered into the Railroad Commission of Texas (RRC) Voluntary Cleanup Program (VCP), A Remedial Action Plan (RAP) was completed, and the RAP was implemented by installing groundwater monitoring well network, and by using on-site enhanced bio-treatment of impacted soil and pit water.
  • Tier 2 protective concentration levels were calculated for the site and groundwater was classified as Class 3 beneficial use based on the widespread chloride content in groundwater in the area.


  • The Phase I ESA was completed within 3 weeks, 2 iterations of Phase II ESA were completed within 3 months, VCP Application Installation of monitoring wells, and on-site bio-remediation was completed within 3 months from dates of notice to proceed for each task.
  • Quarterly groundwater monitoring was employed, and additional sampling, analysis, and regulatory agency reporting and correspondence.
  • 4th quarter of groundwater monitoring and Response Action Completion Report (RACR) will be submitted in September 2020
  • Total project time: June 2019 thru October 2020

Final Resolution or Results-

  • Currently after 12 months, 4 quarters of groundwater monitoring and additional soil and groundwater sampling and analysis, reporting are in support of issuance of a VCP Certificate of Completion under restrictive covenant restricting use of shallow groundwater at the site.