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1.0 INTRODUCTION 1.1 Project History The former Parmar Texaco site, also formerly known as the Lerner Service Station, is located in northern San Joaquin County,California at a street address of 521 North Cherokee Lane in the city of Lodi (Figures 1 and 2). The site is located at the northwestern corner of the intersection of Murray Street and North Cherokee Lane (Figures 3 and 4). The rectangular property is approximately 150 feet by 160 feet in area,and includes a single steel building and canopy(Figure 5). The property is identified as San Joaquin County Assessors Parcel Number APN 041-274-56 and is located within the west central portion of Section 1,Township 3 North,Range 6 East,Mount Diablo Baseline and Meridian (Figure 4). The former Parmar Texaco site was reported to have had a total of five underground storage tanks (USTs)and one waste oil tank located on the property. The former USTs were reported to be: one 10,000 gallon, one 8,000 gallon, two 4,000 gallon,and one 3,000 gallon tanks. The locations of the former fuel USTs are depicted on Figure 5. Ramos Oil Company ( RAMCON) reportedly removed the five fuel DST's and one 550-gallon waste oil tank on February 5, 1988 under permit from the San Joaquin County Department of Public Health Environmental Health Department (PSHEHD). Soil samples collected at that time indicated an unauthorized release of petroleum hydrocarbons as gasoline fuel had occurred into the underlying soil. Site investigative work to date has included: drilling and completing nine groundwater monitoring wells and two soil vapor extraction (SVE) wells with upper and lower zones and the drilling and sampling of about two dozen hydropunch and soil borings (Figure 6). Hydropunch soil borings drilled during 1994 are depicted on Figure 7. The site is under the regulatory direction of the state of California Regional Water Quality Control Board- Central Valley Region (RWQCB). The site has previously been under the regulatory direction of PHSEHD as Local Oversight Program (LOP) site #1324 until July 1, 2015 when oversight direction was transferred to the RWQCB. The site is currently admitted into the State of California State Water Resources Control Board (SWRCB), Department of Financial Assistance, Underground Storage Tank Cleanup Fund (USTCF) program as Claim#8790. The site is maintained in the State Water Resource Control Board(SWRCB) Geotracker program as site global identification number T06077001476. Parmar\Site Assessment workplan\02152018.wpd 1