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L <br /> PRELIMINARY SITE ASSESSMENT REPORT <br /> K & S Gas & Grocery <br /> 701 East Charter Way, Stockton, California <br /> 10. INTRODUCTION AND SCOPE OF WORK <br /> In accordance with the request of Mr Khaldoon Othman of K & S Gas & Grocery, Advanced <br /> GeoEnvironmental,Inc (AGE)has prepared this report for activities performed at 701 East Charter <br /> Way, Stockton, California The scope of work Included the advancement of four soil probe borings <br /> near the current underground storage tank (UST) locations and the collection of soil samples This <br /> investigation was performed in preparation of UST upgrading by tank lining The site location is <br /> illustrated on Figure I -Location Map Structures and soil probe boring locations are illustrated on <br /> Figure 2 - Site Plan <br /> Field%pork was performed in accordance with Central Valley Regional Water Quality Control Board <br /> (CVRWQCB) and San Joaquin County Public Health Services - Environmental Health Division <br /> (PHS-EHD) guidelines for the Investigation of UST sites <br /> 2.0. BACKGROUND <br /> • The site is located in a flat, commercial area of Stockton, California on the northeast comer of <br /> Charter Way and Stanislaus Street It is our understanding that two 12,000-gallon single-walled <br /> gasoline USTs were installed at the site in 1972 The USTs will be upgraded by tank lining One <br /> 1,000-gallon double-walled UST is also located at the site <br /> 30 PROCEDURES <br /> 3 1 PROBING AND SAMPLING <br /> On 19 June 1997, four soil probe borings (probings) Aere advanced at the site using AGE's <br /> Geoprobe 5400 probing unit equipped with 1 25-inch diameter probe rods and a 2 15-inch diameter <br /> soil sampling assembly Probings B 1 and B2 were advanced at an angle of approximately 20° from <br /> vertical Probings B1, B3 and B4 were advanced to a vertical depth of 20 feet, probing B2 was <br /> advanced to a vertical depth of 45 feet All probings were advanced near the 12,000-gallon gasoline <br /> USTs Probing locations are shown on Figure 2 Sample locations for angled probing B2, relative <br /> to the UST locations, are illustrated in Figure 3 <br /> Soil samples were collected at intervals of 5 vertical feet, beginning at 5 feet below surface grade <br /> (bsg), for the total depth of each probing All samples NN ere collected using the Geoprobe soil <br /> sampling assembly loaded with four 1 125-inch by 6-inch brass sleeves After collection, the ends <br /> • of the second brass sleeve were covered with Teflon sheets,capped and sealed with tape The sleeves <br /> Advanced GcoEnN ironmental,Inc <br />