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1/ J SECOR �� 11rf�1lt�rltnlrul Irl 011111«Icrl January 18, 2001 FIL E Pioject 077 41991 018 Mr Ron Rowe San loaquin County Public Health Scivices Environmental Health Division 304 E Weber Avenue, Third Floor Stockton, CA 95201-0388 Re Site Assessment Report Chevron Service Station #9-2033 508 West Charter Way Stockton, California Dear Mr Rowe SECOR International Incorporated (SECOR) has prepared this letter on behalf of Chevron Products Company(Chevron) to document the findings and results of assessment activities at the site referenced above (Figure 1) The purpose of this work is to further evaluate the vertical extent of petroleum hydrocarbons in the soil and groundwater The site assessment included drilling three soil borings onsite to further define lithology Discrete interval groundwater samples were collected from various depths within the bonngs Work was performed in accordance with the December 9, 1997 Work Plan for Site Assessment Activities, by Pacific Environmental Group Inc SITE BACKGROUND AND PREVIOUS INVESTIGATION The site is an operating Chevron Service Station located in a primarily commercial area at the intersection of West Charter Way and South Lincoln Street in Stockton, California A Texaco Service Station operates directly east of the site (across Lincoln Street), and an operating ARCO Service Station is northeast of the site across the intersection The City of Stockton maintenance yard to the south is reported to have, or have had, one or more underground storage tanks (USTs) Chemicals of concern at the site include total petroleum hydrocarbons calculated as gasoline (TPHg), aromatic hydrocarbons including benzene, toluene, ethylbenzene, and xylene (BTEX), and oxygenates, including methyl tertiary butyl ether (MtBE), tertiary r ;017 At/�ore lsoad Suitt /00 1&i7ifbo dwei ( 1 950- ! 91 Ohl 000 910 1O/ 01 )0 /a� ititit .itm torn