Laserfiche WebLink
PUBLIC HEALTH SEkVICES <br /> SAN JOAQUIN COUNTY = i <br /> JOGI KHANNA M.D.,M.P.H. <br /> Health OfficerP <br /> P.O. Box 2009 (1601 East Hazelton Avenue) • Stockton, California 95201 <br /> CgliFp.fit�; <br /> (209)468-3400 <br /> MICHAEL SEIXAS <br /> RIVERSIDE CEMENT CO } <br /> P O BOX 1587 <br /> ORO GRANDE CA 92368 AUG 1993 <br /> RE: Riverside Cement Co. SITE CODE: 2588 <br /> 2825 W. Washington <br /> Stockton, CA <br /> San Joaquin County Public Health Services,Environmental Health Division(PHS/EHD)has <br /> reviewed the"Problem Assessment Report and Final Report of Soil Investigation"dated July <br /> 1993 prepared by Wm. J. Hunter and Associates for the above referenced site. <br /> On April 6, 1993 approximately 120 cubic yards of contaminated soil were excavated from <br /> areas surrounding the former underground storage tank location. This soil was stockpiled <br /> on site. Sidewall soil sample results indicate that soil contamination has been removed <br /> laterally above groundwater. The excavation was filled with clean material in May 1993. <br /> Previously PHS/EHD staff was informed that the stockpiled soil would be disposed of at a <br /> landfill. Therefore, PHS/EHD staff did not witness sampling of the stockpile. Field <br /> compositing of the soil was performed prior to laboratory analysis. This method of sampling <br /> allows volatilization so sample results do not reflect actual conditions. <br /> In order to dispose of the contaminated soil on-site, further sampling will be required. Since <br /> ground water can rise to five feet below ground surface at this site, discrete sampling and <br /> analysis should be performed. A couple of alternatives should be considered. A permit or <br /> exemption can be obtained from the San Joaquin Valley Unified Air Pollution Control <br /> District and sampling can occur after the soil has aerated for a period of time or the <br /> stockpile can be resampled in its current state with PHS/EHD staff present. <br /> In addition,since contaminated soil was removed from depths at which groundwater <br /> sometimes rises to, a groundwater investigation will be required. Please submit a workplan <br /> for this phase of the investigation by October 15, 1993. <br /> A Division of San Joaquin County Health tare Services �� <br />