WORK PLANS - Laserfiche WebLink

Home Browse Search

Vapor Intrusion Investigation Work Plan COUNTRY CLUB FOOD AND FUEL 1856 Country Club Boulevard,Stockton,California 1.0. INTRODUCTION At the request of Mr.Phil Elder of Country Club Food and Fuel,Advanced GeoEnvironmental,Inc. (AGE) has prepared this work plan for a vapor intrusion investigation at 1856 Country Club Boulevard, Stockton, California (the site). This work plan is being prepared in preparation of attaining site closure. The scope of work is to evaluate indoor air pathways at the site and will include the advancement of approximately seven soil probe borings to a depth of five feet below surface grade(bsg). Soil vapor samples will be collected from each probe at a depth of five feet bsg and analyzed by a state-certified laboratory.The location of the site is illustrated on Figure 1.A plan of the site is illustrated on Figure 2. This work plan is prepared in accordance with Guidance For The Evaluation And Mitigation Of' Subsurface Vapor Intrusion To Indoor Air (15 December 2004, revised 07 February 2005) established by the California Environmental Protection Agency(Cal EPA)- Department of Toxic Substances Control (DTSC) for the intrusion of subsurface vapors into buildings. 2.0. BACKGROUND The site is located on the south side of Country Club Boulevard between Mission Road and Buena Vista Avenue in the city of Stockton,California(Figure 1). Situated in an area of low topographic relief,the site is at an elevation between 5 and 10 feet above mean sea level. The surrounding area is utilized for residential and light commercial purposes. The Country Club Food&Fuel facility operates as a gasoline dispensing station and mini-market; currently,one 12,000-gallon gasoline underground storage tank(UST)is currently utilized at the site as a part of business operations(Figure 2). 2.1. REGIONAL GEOLOGIC/HYDROLOGIC SETTING The property is situated within the Great Valley Geomorphic Province of California, a large, elongate, north-northwest trending, asymmetric structural trough. The Great Valley Province has been filled with thick sequences of sediment ranging in age from Jurassic to Recent,creating a nearly flat-lying alluvial plain that extends from the Tehachapi Mountains in the south to the Klamath Mountains in the north. The western and eastern boundaries of this province are comprised of the California Coast Range and the Sierra Nevada, respectively. Rocks composing the basement complex of the province have not been completely defined but are believed to be metamorphic and igneous in origin. The northern and southern portions of the Great Valley Province have been designated the Sacramento and San Joaquin Valleys, respectively. Advanced GeoEnvironmental,Inc.