Laserfiche WebLink
PUBLIC HEALTH SEIrRCES <br /> SAN JOAQUIN COUNTY = 'i <br /> JOGI KHANNA M.D.,M.P.H. <br /> Health Officer <br /> C4C/ <br /> P.O. Box 2009 (1601 East Hazelton Avenue) Stockton,California 95201 FpR�`P <br /> (209) 468-3400 <br /> June 3 , 1990 <br /> Julian Munoz <br /> Safeway Stores, Inc. <br /> 2800 Ignacio Valley Road D U <br /> Walnut Creek, CA 94598 <br /> IN REPLY REFER TO SITE CODE: 1194 <br /> RE: Safeway Meat Packing Facility <br /> 1111 Navy Drive, Stockton <br /> Subsurface Investigation Report <br /> We have reviewed the January, 1990 Subsurface Investigation <br /> Report prepared for this site by Western Geologic Resources, Inc. <br /> The investigation included installation of one additional <br /> groundwater monitoring well and sampling of five additional soil <br /> borings. <br /> The groundwater elevation at the site has lowered approximately <br /> seven feet and the direction of groundwater flow has changed <br /> since the last sampling (September, 1988) . Petroleum <br /> hydrocarbons have not been detected in groundwater at this site. <br /> However, proper screen placement in the monitoring wells has been <br /> questioned. Furthermore, soil samples obtained from within one <br /> foot of the saturated zone in three of the soil borings contained <br /> petroleum hydrocarbons at concentrations as high as 2 , 400 parts <br /> per million. Because none of these borings were completed as <br /> groundwater monitoring wells, it is not possible to determine <br /> whether groundwater has been impacted by petroleum hydrocarbons. <br /> Based on the recent decline in water levels, the changes in <br /> gradient, and the concentrations of petroleum hydrocarbons in <br /> soils within the previous zone of saturation, we feel that <br /> additional groundwater sampling and measuring should be <br /> conducted. This should confirm the gradient and aid in <br /> evaluating the need for further groundwater investigation. <br /> Notify San Joaquin County, Environmental Health Division, prior <br /> to sampling so we may witness it. <br /> A Division of San Joaquin County Health Care Services <br />