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Preliminary Site Assessment Report ISLAMIC.CENTER OF STOCKTON 1130 South Pilgrim Street, Stockton, California 1.0. INTRODUCTION At the request of Mohammad Saeed, representative for the Islamic Center of Stockton,Advanced GeoEnvironmental, Inc. (AGE)has prepared the enclosed Preliminary Site Assessment Report for Islamic Center of Stockton at 1130 South Pilgrim Street, Stockton, California(site). The scope of work included advancement of two soil borings, collection of soil and ground water samples, and preparation of this report. Soil boring advancement procedures were outlined in the AGE-prepared Preliminary Site Assessment Work Plan (Work Plan),dated 04 February 2005. Completion of work and report preparation was executed in accordance with the.San Joaquin County Environmental Health Department (EHD) directive letter, dated 08 April 2005, that approved the Work Plan. Site location is illustrated on Figure 1. Sampling locations, soil boring locations, and site plans are depicted in Figure 2. Site Background information' is summarized in Appendix A. Work was conducted in accordance with Central Valley Region of the Regional Water Quality Control Board (CVRWQCB) guidelines for investigation of underground storage tank (UST) sites. 2.0. PROCEDURES Field work was performed in accordance with procedures outlined in the Work Plan. A chronology of the site investigation is as follows: • Advancement of soil boring B 1 completed to a total depth of 15 feet below surface grade (bsg) and discontinued due to refusal by the soil. • Advancement of soil boring B2 completed to'a total depth of 55 feet and collection of a ground water sample.' 2.1. DRILLING Soil borings were advanced at the site utilizing a van�mounted Geoprobe 5400 direct-push probing unit equipped with 1.125-inch probing rods. Soil-boring locations and designations are depicted in Figure 2. 2.2. SOIL SAMPLE COLLECTION AND ANALYSIS Soil samples were collected from borings at discreet 5400t intervals using a 1.25-inch Geoprobe soil sampling assembly loaded with four six-inch brass sleeves.For each soil sample collected,both ends Advanced GeoEnvironmentaI,Inc.