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nEmcon Associates <br /> 1433 North Market Boulevard • Sacramento California 95834-1943• (916)928-3300• Fax(916)928-3341 <br /> April 27, 1995 <br /> Project 0805-144 02 <br /> Mr. Kyle Christie <br /> ARCO Products Company <br /> 2155 South Bascom, Suite 202 <br /> Campbell, California 95008 <br /> Re- Fust Quarter 1995 Status Report for ARCO Service Station No 2076 at 800 East <br /> Kettleman Lane,Lodi,California <br /> Dear Mr Christie <br /> At the request of ARCO Products Company (ARCO), EMCON is conducting an <br /> environmental investigation at the subject site (see Figure 1) We have prepared this status <br /> report on the work conducted during the fust quarter 1995, which ;included measuring <br /> depth to groundwater, collecting groundwater samples from the wells for subjective and <br /> laboratory analyses, and calculating the groundwater gradient and direction of <br /> groundwater flow beneath the site <br /> . BACKGROUND <br /> Work performed prior to this quarter included drilling 19 soil borings and installing <br /> 4 groundwater monitoring wells and 7 vapor extraction wells Residual hydrocarbons <br /> were analytically identified in soil samples collected from bonngs near the tank cavity and <br /> dispenser island <br /> RESNA Industries ([RESNA] formerly Applied GeoSystems) performed a vapor <br /> extraction test on July 30, 1991 (RESNA, September 12, 1991) In November 1991, <br /> RESNA observed the removal of five gasoline storage tanks and associated product lines <br /> and excavation of a new tank cavity (RESNA, June 26, 1992) ARCO's contractors <br /> installed new tanks in the tank cavity east of the station building in November 1991 <br /> ARCO initiated groundwater monitoring in October 1992 Results have indicated that <br /> dissolved hydrocarbons have not been detected in groundwater, with the exception of total <br /> xylene, which was detected in well MW-3 at a concentration of 0 7 part per billion (ppb) <br /> during the fourth quarter 1993 <br /> GROUNDWATER MONITORING: FIRST QUARTER 1995 <br /> EMCON of Sacramento, California, was contracted by ARCO to monitor the <br /> groundwater in the monitoring wells previously installed at the site EMCON used these <br /> sAON 1PJOM05\08051 440 2AG941i1b l <br />