Laserfiche WebLink
U + <br /> 'k <br /> 1.0 INTRODUCTION <br /> This work plan presents the scope of work and methodology that.Tetra:Tech EM Inc. (Tetra Tech) will <br /> use to conduct a subsurface underground storage tank (UST) site evaluation at 4950 Bonham Street, <br /> F <br /> Linden California. The subsurface UST evaluation will assess the nature and extent of petroleum <br /> hydrocarbon impacts to the soil associated with a former 3,500-gallon underground storage tank (UST) <br /> F <br /> and a former 4,000-gallon UST at the site. The work described in II this work plan is intended to expedite <br /> the tank sites towards regulatory closure and no further action status. <br /> 1.1 SITE LOCATION AND DESCRIPTION <br /> An unauthorized release of petroleum hydrocarbons was discovered during the removal of one 3,500- <br /> j <br /> gallon UST,tank identification number 39-2528-02; and a 4000-gallon UST,tank identification number <br /> 39-2528-01, at the referenced site. Soil samples obtained from the tank pit indicated total petroleum <br /> I <br /> hydrocarbon contamination ranging from 1,000 milligrams per kilogram (mg/kg)to 1,500 mg/kg. The <br /> soil sample analysis indicated that the hydrocarbon contamination ii as weathered diesel fuel. No <br /> gasoline or gasoline constituents were detected. iF M <br /> 1.2 PURPOSE <br /> 34 <br /> The purpose of the proposed work described in this work plan is to determine the vertical and horizontal <br /> 1 <br /> extent of petroleum hydrocarbons in the soil in the vicinity of the two former USTs. Information <br /> obtained during the Iimited subsurface investigation will be used to move the tank site towards no further 4 <br /> action status. ° <br /> p <br /> I} <br /> 1.3 PROJECT SCOPE OF WORK <br /> The proposed scope of work includes the following tasks: i <br /> • Task I-Work Plan Development: Prepare and submit a work plan for review and comment by the <br /> San Joaquin County Public Health Services-Environmental Health Division(PHS-EHD)to obtain 1 <br /> Ij <br /> regulatory concurrence before initiation of the proposed field activities. <br /> j <br /> f <br /> I. 11 A <br />