REMOVAL_2014 - Laserfiche WebLink

Home Browse Search

• • RECEIVED FEB 2 6 2014 • Section 2.0 ENVIRONMENTAL UST Removal and Soil Sampling Activities HEALTH DEPARTMENT In January 2014, Waterstone was present to witness Tafoya and Associates of Chino, California for the scope of work of UST and fuel line removal, which included Waterstione conducting soil sampling beneath USTs, fuel lines, and from the soil stockpiles. 2.1 UST Removal Activities In May 2012,the contents of the UST were removed, the tanks and piping were triple rinsed, and appropriate measures were completed for in-place temporary closure of the two 12,000-gallon USTs and one 15,000-gallon UST and associated equipment. In September 2013, Tafoya and Associates obtained the UST removal permit to remove the two 12,000-gallon and one 15,000-gallon USTs, associated piping, and other appurtenances from the Site from the San Joaquin County Environmental Health Department(Appendix B). On January 9, 2014, Tafoya and Associates of Chino, California performed the UST removal activities on behalf of Thrifty which consisted of concrete removal, overburden soil excavation via backhoe, stockpiling of soil with cover in preparation for UST removal, and removal of the fuel dispensers for future re-use. Volatile organic compound (VOC)emissions were monitored by Waterstone using a calibrated hand held Mini-Rae photo-ionization detector(PID) during soil • excavation activities.No elevated VOCs readings were detected above background levels and no noticeable hydrocarbon odors were detected during the entire UST soil excavation process. Soils were stockpiled awaiting soil analytical results from the four soil samples (SP-1 through SP-4) collected from the stockpile on January 9, 2014. The stockpile and sampling locations are depicted in Figure 2. On January 9, 2014, the tanks were triple rinsed,the contents were removed via vacuum truck (200 gallons total), and the headspace was inspected and analyzed by Adams Services of Gardena, California, with an organic vapor analyzer. Adams Services determined the USTs to be clean and safe for transport and recycling. The USTs were then inerted with 30 pounds of dry ice per 1,000 gallon volume as required by the onsite Stockton Fire District Inspector Robert Kubena. A copy of the Hazardous Waste Tank Closure Certifications and waste manifest for liquid disposal are included in Appendix C. On January 9, 2014,the tanks were removed by crane and the associated fuel piping was removed and chopped up with a chop-saw into approximately 2 to 3 foot long pieces. The piping was removed by Adams Services and recycled by SJC Lovelace of Manteca, California. The USTs were loaded onto a flatbed truck with a crane, approved and marked for transport by the onsite Stockton Fire District Inspector Robert Kubena, and taken to Schnitzer Steel of Oakland, California for recycling. A copy of the certificate of destruction and recycling is included in Appendix D. San Joaquin County Environmental Health Department(SJCEHD) Inspector Jeff Wong, along with Stockton Fire District Inspector Robert Kubena,were present onsite during the tank • Thrifty Station No.401 - 2 Waterston Environmental,Inc. February 2014 Project 13-140