SITE INFORMATION AND CORRESPONDENCE

Home Browse Search

Mr. Kyle Christie • •oject 0805-152.01 November 14, 1994 Page 2 hydrocarbons in sod appeared to be limited to between 50 and 70 feet bgs, dependent upon location, and from surface grade to approximately 70 feet bgs beneath the dispenser islands. RESNA performed a vapor extraction test at the site on October 14, 1991, using vapor extraction wells VW-1, VW-2, VW-3, and VW-4 (RESNA, January 31, 1992, Report 30041-2). The results of the test indicated that vapor extraction is a feasible means to remove residual gasoline hydrocarbons from the soil. In December 1992, RESNA observed drilling of one soil boring (B-26) and construction of a vapor extraction well (VW-17). Residual gasoline hydrocarbons were detected in sod samples collected from the soil boring (RESNA, March 18, 1993, Report 30041-4). Groundwater was not encountered in the sod boring. The lateral extent of residual gasoline hydrocarbons in soil has been delineated in all directions, with the exception of the vicinity south of boring B-26. WORK CONDUCTED THIRD QUARTER 1994 On October 3, 1994, EMCON submitted a third license agreement to the property owner across Patterson Pass Road in order to gain access for further assessment of soil. WORK IN PROGRESS EMCON will submit a fourth access agreement to the property owner south of the ARCO site for drilling three soil borings and installing vapor extraction wells in November 1994. Once ARCO has received authorization to access property, EMCON will proceed with final assessment activities. DOCUMENT DISTRIBUTION We recommend that a copy of this status report be forwarded to: Ms. Margaret Lagorio San Joaquin County Public Health District P.O. Box 2009 Stockton, California 95201 Ms. Elizabeth Thayer Central Valley Regional Water Quality Control Board 3443 Routier Road, Suite A Sacramento, California 95827-3098 SACS AC,PJM805/08051520.1 AM-94Afc:3