SITE INFORMATION AND CORRESPONDENCE (3)

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i• `� NOW, San Joaquin County DIRECTOR °"'" Environmental Health Department Donna Heran,RENS �O - ff cp 1 ASSISTANT DIRECTOR 2 'y 600 East Main Street Laurie Cotulla,RENS Stockton, California 95202-3029 PROGRAM COORDINATORS •' - Carl Borgman,REHS Website: www.s ov.of /ehd Mike Huggins,REHS,RDI 4�i F6 R� �g g Margaret Lagorio,REHS Phone: (209) 468-3420 Robert McClellon,REHS Fax: (209) 464-0138 ,teff Carruesco,REHS,RDI Kasey Foley,REHS SANDRA YACOUB SEP 1 9 2007 ROMEO YACOUB 3978 S HWY 99 E FRONTAGE ROAD STOCKTON CA 95215 RE: Low Price Auto Glass/Former Texaco SITE CODE: 1322 3978 S. Hwy 99 E. Frontage Rd. Stockton CA 95215 San Joaquin County Environmental Health Department (SJC/EHD) has received correspondence (copy enclosed) from Chevron Environmental Management Company (Chevron) concerning their responsibility for the contamination found at the above referenced former underground storage tank (UST) site. Chevron was named as a responsible party to this site based on the documented operation of a service station with UST's by Texaco from approximately 1956 through 1973. Chevron considers the contaminants of concern at this site to be methyl tertiary butyl ether (MTBE) and 1,2-dichloroethane (1,2-DCA). They state that Texaco did not begin using MTBE as a fuel additive in this region until 1992 so the release must have occurred after Texaco operated at the site. They further reason that 1,2-DCA is a common industrial solvent and that the lack of information concerning the site uses/operations from 1974 through 2000 is sufficient reason for them to not accept responsibility for the contamination and perform the required investigation and remediation of this site. SJC/EHD has informed Chevron that MTBE is not considered a contaminant of concern at this site, it is not even considered to be present at this site. Reported detections of MTBE in two soil samples from boring P3 were analyzed by laboratory Method 8021. Confirmation analysis of these samples by the more reliable laboratory Method 8260B reported MTBE as non-detect. In addition, SJC/EHD informed Chevron that although 1,2-DCA may have been used as an industrial solvent at other sites there is no documentation of its use at this site, 1,2-DCA was added to leaded gasoline during the period of Texaco's operation of a service station at this site and that there are reported detections of total petroleum hydrocarbons as gasoline (TPHg) in the samples collected as well as the 1,2-DCA. Although your consultant (with your approval) reviewed the property file at the San Joaquin County Assessors Office (SJC/AO) in the past, they did not make copies of the records past 1973 when the UST's were removed. These records may show the use of the property from 1974 to 2000 and/or document that no other UST's were installed or