Laserfiche WebLink
Second Semi-Annual 2021 Groundwater Monitoring, Batch Extraction Results Report & Supplemental Site Investigation <br />Waterloo Food and Fuel <br />3032 East Waterloo Road, Stockton, California <br />Page 2 <br />BACKGROUND <br />January 6, 1999— Oil Equipment Services of San Andreas, California removed four USTs from the <br />Site identified as T-1 (5,000-gallon gasoline UST), T-2 (10,000-gallon gasoline UST), T-3 (10,000- <br />gallon gasoline UST), T-4 (500-gallon waste oil UST), fuel dispensers and associated product piping <br />from the northeast portion of the Site. During excavation, two previously unknown USTs, identified <br />as USTs #5 and #6, were also discovered. <br />February 9, 1999 — Geotechnical Research & Development prepared a report summarizing the <br />removal of the USTs identified as Ti through T4. <br />February 16, 1999 — Oil Equipment Services removed USTs #5 and #6 from the Site. <br />February 22, 1999 — Approximately 125 cubic yards of petroleum hydrocarbon impacted soil was <br />excavated from the Site and transported to an off-site location for disposal. Following this initial <br />exaction activity, new USTs and dispensers were installed at the Site. <br />March 25, 1999 — AdvancedGeo Environmental, Inc completed the Underground Storage Tank <br />Removal and Soil Sample Analysis Report. <br />December 1999 — AdvancedGeo Environmental, Inc. completed the initial soil borings within the <br />Site to assess the impacts of the petroleum hydrocarbon release to the subsurface. The borings <br />consisted of a series of GeoProbe direct push borings soil sampling location and grab groundwater <br />samples. <br />January 2000 — AdvancedGeo Environmental, Inc. installed monitoring wells identified as MW-1 <br />through MW-4 and Continuous Multichannel Tubing (CMT) groundwater monitoring wells MW-5 <br />through MW-8. <br />December 14, 2000— AdvancedGeo Environmental, Inc., completed the Preliminary Investigation <br />and Evaluation Report for the Site. <br />February 2003 — AdvancedGeo Environmental, Inc. began installation and operation of a <br />groundwater extraction and groundwater treatment system. <br />September 2006 — AdvancedGeo Environmental, Inc. installed seven Soil Vapor Extraction wells, <br />associated piping, and a Solleco thermal oxidizer Soil Vapor Extraction unit. <br />December 2009 — Soil vapor extraction is estimated to have removed a total of 32,814 lbs./5,250 <br />gallons of petroleum hydrocarbons from the Site. <br />October 2016 - The groundwater treatment system removed a total of 12,568 lbs./2,010 gallons of <br />petroleum hydrocarbons, 701.4 lbs./11 gallons of benzene, and 1,253 lbs./200 gallons of MTBE <br />from the Site by the time operation was discontinued in October 2016.