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h <br /> • April 15, 1993 Working To Restore Nature <br /> h ARCO Service Station No 2076, Lodi, California <br /> Well Installation <br /> Wayne Drilling installed vapor-extractionwellsVW-4 through VW-7 in borings B-12 through <br /> B-15, respectively, and monitoring wells MW-1 through MW-4 in borings B-16 through B-19, <br /> respectively Details of well construction are shown on the Logs of Borings <br /> i The vapor-extractton wells are interconnected by horizontal PVC piping which was <br /> previously installed <br /> Monitoring Well Development and Ground-Water Samplin;� <br /> A technician from RESNA was at the site on October 22, 1992, to examine samples from <br /> the wells for subjective evidence of hydrocarbons The monitoring wells had no sheen or <br /> . floating product and were subsequently developed <br /> On October 23, 1992, a technician from RESNA measured the depths to water, examined <br /> ground-water samples from the wells for subjective evidence of hydrocarbons, and purged <br /> the wells and collected ground-water samples for laboratory analyses Water-level <br /> measurements were taken to the nearest 0 01-foot with a Solmst water-level indicator No <br /> visible evidence of sheen or floating product was noted in the ground water <br /> All water purged during development and sampling was placed in Department of <br /> Transportation 17E drums and left on the site After the analytical results of the ground- <br /> water samples were received, at the request of ARCO, Balch Petroleum removed and <br /> disposed of the containerized purge water <br /> 30048-5 7 <br />