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Interim Soil Remediation Work Plan /ll�40 Former Mel Bokides Petroleum - Linden T� 8203 East Highway 26, Stockton, California \�'1/T fFi(�T X999 1.0. INTRODUCTION CFS �Ty At the request of Mr. Nick Bokides of Mel Bokides Petroleum, Advanced GeoEnvironmental, Inc. (AGE) has prepared the enclosed Interim Soil Remediation Work Plan for the property located at 8503 East Highway 26, Stockton, California. The location of the site is illustrated on Figure 1 and a plan of the site is illustrated on Figure 2. This Work Plan is prepared in accordance with San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) and Central Valley Regional Water Quality Control Board (CVRWQCB) guidelines for the investigation of underground storage tank (UST) sites. 2.0. BACKGROUND A gasoline station and mini-mart formerly occupied the site. Three USTs were removed from the site in May 1999 by Semco of Modesto. 2.1. SITE DESCRIPTION The site is bounded on the north by a residential property. The site is bounded on the east by Alpine Road and bounded on the south by State Highway 26. Commercial properties are east and west of the site. 2.2. UNDERGROUND STORAGE TANK REMOVAL Three USTs and associated piping and a dispenser island were removed from the site on 07 May 1999. Six samples were collected beneath the USTs, two soil samples were collected beneath the dispenser area and four laboratory composited soil samples were collected from the excavated soil. Total petroleum hydrocarbons quantified as gasoline (TPH-g) was detected at concentrations up to 17,000 milligrams per kilogram (mg/kg) beneath the northern end of the northern UST location (Tank-41). TPH-g was also detected beneath the southern end of the northern UST location at a concentration of 9,900 mg/kg. Volatile aromatics (benzene, toluene, ethyl benzene and xylenes: BTEX) were detected at concentrations up to 3,000,000 micrograms per kilogram (µg/kg) from the same sample locations. Methyl tertiary butyl ether (MTBE) and/or tertiary butanol (TBA) were detected in soil samples collected from the former UST excavation and stockpiled soil at the site. The presents of MTBE in Advanced GcoEnvironmental,Inc.