Piedmont Geologic, P.C
Total Page:16
File Type:pdf, Size:1020Kb
February 10, 2014 Mr. Ken Currie North Carolina Department of Environment and Natural Resources Fayetteville Regional Office 225 Green Street, Suite 714 Fayetteville, North Carolina 28301-5094 RE: Remedial Action Progress Report: July - December 2013 TransMontaigne-Selma North Terminal 2600 W. Oak Street, Selma, Johnston County, North Carolina NCDENR Incident No. 90110 Dear Mr. Currie: Enclosed is one copy of the Remedial Action Progress Report: July - December 2013 (RAPR), dated February 10, 2014, for the TransMontaigne-Selma North terminal in Selma, Johnston County, North Carolina. The report provides information regarding startup operation of the site groundwater remediation system, as proposed in the site Corrective Action Plan (CAP), dated December 10, 2012, and site groundwater sampling/analysis completed in November 2013. With subsurface LPH being apparently mitigated at the site, air sparging is being added to the site remediation approach to complement the existing soil vacuum extraction (SVE) system and enhance the rate of site groundwater remediation. Installation and startup of an air-sparging system was completed in January 2014. Information regarding installation and operation of the air sparging system will be reported in the next RAPR, covering the period from January through June 2014. If you have any questions or need any additional information, please call. Sincerely, Peter J. Dressel Peter J. Dressel, P.G. Project Manager cc: Doug Hall, TransMontaigne Jim Sligh, TransMontaigne Enclosure REMEDIAL ACTION PROGRESS REPORT: JULY - DECEMBER 2013 TransMontaigne-Selma North Terminal 2600 W. Oak Street Selma, North Carolina NCDENR Incident No. 90100 NCDENR Risk Ranking: Intermediate PREPARED FOR: TransMontaigne 200 Mansell Court East, Suite 600 Roswell, Georgia 30076 PREPARED BY: Piedmont Geologic, P.C. 6003 Chapel Hill Road, Suite 145 Raleigh, North Carolina 27607 February 10, 2014 Piedmont Geologic is a professional corporation licensed to practice Geology (C-216) and Engineering (C-3104) in North Carolina. Remedial Action Progress Report: July- December 2013 TransMontaigne - Selma North Terminal February 10, 2014 SITE INFORMATION Site Identification Date of Report: February 10. 2014 Facility l.D.: Not applicable Incident No.: 90100 Site Rank: Intermediate Site Name: TransMontaigne-Selma North Terminal Site Address: 2600 W. Oak Street City/Town: Selma Zip Code: 27576-9199 County: Johnston Description of Geographical Data Point: Monitoring well MW-1 Location Method: Google Earth Latitude: 35.5533° N Longitude: 78.3072° W Information about Contacts Associated with the Release AST Owner: TransMontaigne Address: 1670 Broadway. Suite 3200. Denver. CO 80202 Tel: 303-616-8218 AST Operator: TransMontaigne Address: 1670 Broadway. Suite 3200. Denver, CO 80202 Tel: 303-616-8218 Other Person Responsible for Release: None Address: Not applicable Property Owner/Occupant: TransMontaigne Address: 1670 Broadway. Suite 3200. Denver. CO 80202 Tel: 303-616-8218 Consultant/Contractor: Piedmont Geologic. P.C. Address: 6003-145 Chapel Hill Road. Raleigh. NC 27607 Tel: 919-854-9700 Analytical Laboratory: Not applicable Address: Not applicable State Certification No.: Not applicable Information about Release Date Discovered: June 7. 2012 Estimated Quantity of Release: Unknown Cause of Release: Leak from pipe fitting Source of Release: Vapor recovery unit Sizes and Contents of ASTs or other Containment from which the Release Occurred: 287 gallons/gasoline Certification I, Peter J. Dressel, a Licensed Geologist for Piedmont Geologic, P.C., do certify that the information contained in this report is co~eot·and 1;1ccurate to the best of my knowledge. "' .-. ·~ . ., c' .-,". The 11 Remedial Action Progress Report: July - December 2013 TransMontaigne – Selma North Terminal February 10, 2014 TABLE OF CONTENTS Page No. SITE INFORMATION ................................................................................................................................ II 1.0 INTRODUCTION ............................................................................................................................. 4 2.0 SITE BACKGROUND INFORMATION ....................................................................................... 5 2.1 FACILITY INFORMATION ....................................................................................................................... 5 2.2 HISTORICAL SITE RELEASE INCIDENT .................................................................................................. 6 2.3 DESCRIPTION OF JUNE 7, 2012 LIQUID-PHASE HYDROCARBON DISCOVERY ........................................ 7 2.4 SITE GEOLOGIC/HYDROGEOLOGIC SETTING ........................................................................................ 7 2.5 SITE SOIL AND GROUNDWATER COC DISTRIBUTION ........................................................................... 8 2.6 SUMMARY OF LPH CHARACTERIZATION AND RECOVERY ................................................................. 10 3.0 SVE SYSTEM DESCRIPTION ..................................................................................................... 12 4.0 SVE SYSTEM OPERATION, MONITORING, AND PERFORMANCE ................................. 13 5.0 GROUNDWATER SAMPLING AND ANALYSIS ..................................................................... 15 5.1 GROUNDWATER SAMPLING AND ANALYSIS METHODS ...................................................................... 15 5.2 GROUNDWATER SAMPLING AND ANALYSIS RESULTS ........................................................................ 15 6.0 RECOMMENDATIONS ................................................................................................................ 17 7.0 REFERENCES ................................................................................................................................ 18 Figures 1 Site location map 2 Site map 3 Inset area for vapor recovery unit 4 Aerial image of site area 5 VRU-area cross-section locations 6 VRU-area cross-section A-A’ 7 VRU-area cross-section B-B’ 8 VRU-area cross-section C-C’ 9 SVE system layout 10 Water table contour map: 11/13/13 11 Results of laboratory analysis of November 2013 groundwater samples Tables 1 Aboveground storage tank information 2 Groundwater monitoring and remediation well construction details 3 Monitoring-well gauging data 4 Liquid-phase hydrocarbon recovery information 5 Summarized results of laboratory analysis; groundwater samples collected November 2013 6 Historical summary of groundwater analysis results Appendices A SVE system as-built construction drawings B Field forms C Laboratory reports PIEDMONT GEOLOGIC, P.C. iii Remedial Action Progress Report: July - December 2013 TransMontaigne – Selma North Terminal February 10, 2014 1.0 INTRODUCTION This document presents a Remedial Action Progress Report (RAPR) for the period from July through December 2013 for the TransMontaigne – Selma North terminal in Selma, Johnston County, North Carolina. The site has been assigned Incident No. 90100 by the North Carolina Department of Environment and Natural Resources (NCDENR) due to of subsurface liquid-phase hydrocarbons (LPH) during routine site monitoring-well gauging in June 2012, and the subsequent detection of concentrations of petroleum chemicals of concern (COCs) in site soil and groundwater in August 2012, as described in the site Comprehensive Site Assessment Report (CSA report), dated September 12, 2012. The plan for site soil/groundwater remediation was detailed in the Corrective Action Plan (CAP), dated December 10, 2012. NCDENR approval of the CAP was received via a January 16, 2013 letter from NCDENR to TransMontaigne. Installation of a soil vapor extraction (SVE) system was completed from March to April 2013 in accordance with the Technical Specifications: Soil Vapor Extraction System Installation, dated February 15, 2013, and startup of the SVE system occurred on May 16, 2013. Following is a summary of current information related to the site remediation system operation. Summary of Remediation System Operation SVE system start-up date May 16, 2013 Reporting period July 1 – Dec. 31, 2013 SVE system ON-time during reporting period 1,656 hours SVE system OFF-time during reporting period 2,394 hours SVE system ON-time percentage during reporting period 41% Total SVE system ON-time since startup 492 hours Total SVE system ON-time percentage since May 2013 startup 42% Estimated mass of gasoline hydrocarbons recovered by SVE during reporting period 105 lbs Total estimated mass of gasoline hydrocarbons recovered by SVE since May 2013 startup 2,889 lbs Total volume of gasoline in liquid phase recovered from MW-1 since June 2012 16.7 gal Site groundwater sampling was conducted during the reporting period in November 2013. Results of laboratory analysis indicate that groundwater COCs resulting from the gasoline release discovered in June 2012 remain confined to the immediate area of the release. In order to enhance the rate of site groundwater remediation, air sparging is being added to the site remediation approach to complement the SVE system. Installation of an air-sparging well (AS-1) and air- sparging system was completed in January 2014. Startup of the air-sparging system occurred on January 27, 2014. Information regarding installation of the air sparging system will be reported in the next RAPR, covering the period from January through June 2014. PIEDMONT GEOLOGIC, P.C. 4 Remedial Action Progress Report: July - December 2013 TransMontaigne –