Laserfiche WebLink
�I <br /> PUBLIC; HEALTH SERVICES <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Karen Furst, M.D. , M.P.H. , Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 <br /> 209/468-3420 <br /> PAUL SUPPLE SEP 2 6 2D01 <br /> ARCO PRODUCTS COMPANY <br /> P O BOX 6549 <br /> MORAGA CA 95470 <br /> RE : Former ARCO #548 SITE CODE : 1127 <br /> 1612 Hammer Lane <br /> Stockton CA 95209 <br /> San Joaquin County Public Health Services , Environmental Health Division (PHS/EHD) <br /> has reviewed the Quarterly Groundwater Monitoring Report, Second Quarter 2001 dated <br /> August 24, 2001 that was submitted on your behalf by Delta Environmental Consultants, <br /> Inc. and has the following comments. <br /> The report documents the groundwater monitoring and sampling event that took place at <br /> this site on June 19, 2001 . Analytical results from the six monitoring well samples were <br /> consistent with prior events in showing non-detect or low-level petroleum hydrocarbon <br /> contamination in the collected groundwater. However, all of the monitoring wells currently <br /> on site have submerged well screens. <br /> Quarterly monitoring reports for the fourth quarter of 2000 and the first quarter of 2001 <br /> reported that floating free product was discovered in vapor extraction well VW-5D. Six <br /> vapor extraction wells are on site. Of those six, five are properly screened to intercept first <br /> groundwater. Groundwater in vapor extraction wells VW-1 through VW-4 was monitored <br /> and sampled during the third and fourth quarters of 1998 . Analytical results showed <br /> significant petroleum hydrocarbon and fuel oxygenate contamination in each well. After <br /> these two events, the vapor wells were not scheduled for sampling . <br /> PHS/EHD directs the resumption of the monitoring and sampling of groundwater in the <br /> vapor wells during the routine events. <br /> If you have any questions or comments please call Lori Duncan at (209) 468-0337. <br /> Donna Heran , REHS, Director <br /> Environmental Health Division <br /> ('eSL\ Gt L'a cA h <br /> Lori Duncan , Senior REHS Dot Lofstrom, R. G . <br /> LOP/Site Mitigation Unit IV Engineering Geologist. <br /> cc: Marty Hartzell , CVRWQCB <br /> Jay Johnson , Delta <br /> A Division of San Joaquin County Health Care Services <br />