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AdvancedGeo <br />Environmental <br />29 March 2018 <br />AGE Project No. 18-4345 <br />Mr. Michael Kith <br />San Joaquin County Environmental Health <br />1868 E. HazeIton Avenue <br />Stockton, California 95205 <br />Subject: Phase II Site Assessment Work Plan <br />DOMINIC'S AUTO TECH <br />435 North Harrison Street, California <br />Dear Mr. Kith: <br />Advanced GeoEnvironmental, Inc. (AGE) has prepared this Phase 11 Site Assessment <br />Work Plan for the property located at 435 North Harrison Street, Stockton, California <br />(site). The work plan provides procedures for the collection of soil and soil-vapor samples <br />at the site. The site and surrounding area are illustrated in Figure 1; on-site structures <br />and proposed soil boring locations are illustrated in Figure 2. <br />INTRODUCTION AND BACKGROUND <br />During the performance of a Phase I Environmental Site Assessment for the site, AGE <br />identified one active and one abandoned hydraulic hoist at the site. Additionally, AGE <br />identified a vapor encroachment condition (VEC) at the site due to an underground <br />storage tank (UST) facility located immediately north of the subject property. Based on <br />these findings, AGE recommended that two (2) borings be advanced in the location of the <br />active and former hydraulic hoists, and one (1) boring be advanced at the northern <br />property boundary to evaluate the VEC. Proposed boring locations are illustrated in <br />Figure 2. Procedures for collection of soil and soil-vapor samples are described in detail <br />below. <br />SCOPE OF WORK <br />AGE proposes to advance a total of two (2) soil borings to total depths of 12 feet below <br />surface grade (bsg) for collection of soil samples at eight (8) and 12 feet bsg. Additionally, <br />AGE proposes to advance one boring to a total depth of five (5) feet bsg for collection of <br />a soil-vapor sample. The soil-vapor sample will be collected from the proposed boring <br />utilizing a Summa Canister. Proposed boring locations are depicted in Figure 2. <br />837 Shaw Road • Stockton, CA 95215 <br />Telephone (800) 511-9300 • Fax (888) 445-8786 <br />An Employee-Owned Company