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UST REMOVAL REPORT K & S Gas & Grocery 701 East Charter Way, Stockton, California 1.0. INTRODUCTION AND SCOPE OF WORK In accordance with the request of Mr. Khaldoon Othman of K&S Gas & Grocery, Advanced GeoEnvironmental, Inc. (AGE) has prepared this report for the removal of three underground storage tanks (USTs) performed at 701 East Charter Way, Stockton, California. Soil samples were collected beneath the USTs and product piping. Impacted soil was excavated for the installation of one new UST. The site location is illustrated on Figure 1 - Location :1fop. Structures, former UST and sample locations are illustrated on Figure 2 - Site Plan. Field work was performed in accordance with Central Valley Regional Water Quality Control Board (CVRWQCB) and San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) guidelines for the investigation of UST sites. 2.0. BACKGROUND The site is located in a commercial area of low topographic relief in Stockton, California on the northeast corner of Charter Way and Stanislaus Street. It is the understanding of AGE that two 12.000 -gallon single -walled gasoline USTs were installed at the site in 1972. One 1,000 -gallon double -walled UST was installed at the site at a later time. On 19 June 1997, four soil probe borings were advanced at the site near the 12,000 -gallon USTs . Petroleum hydrocarbons were detected in soil samples collected near the southeast corner of the USTs. Soil probe boring installations were described in a Preliminary Site Assessment Report prepared by AGE in August 1997. 3.0. PROCEDURES 3.1. UST REMOVALS The UST removals were performed on 13 February 1998 by Stokley Construction of Tracy. Permits were obtained from the PHS-EHD and the City of Stockton Fire Prevention Division (Appendix A). The USTs and product piping were uncovered using a backhoe. All USTs and their connecting piping were triple rinsed with a steam cleaner. The rinsate was removed from the USTs by Nor Cal Oil, using a vacuum truck and was hauled to Americlean, Inc. in Silver Springs, Nevada for disposal/recycling. A certificate of triple rinse and invoice for rinse water disposal are included in Appendix A. Approximately 1,000 pounds of dry ice was added to the USTs (minimum of 30 pounds per 1,000 gallon capacity). The percent oxygen and lower explosive limit (LEL) were Advanced GeoEnvironRIM21. Inc.