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Ill . <br /> oJ� j <br /> PUBLA_". HEALTH SER110ES <br /> SAN JOAQUIN COUNTY r. z <br /> a: .a <br /> JOGI KHANNA M.D.,M.P.H. <br /> Health Officer P <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) Stockton,California 95201 <br /> c4�iFo'R°'� <br /> (209) 46&3400 <br /> SEP 1 1 1991 <br /> THOMAS E HENDRIX <br /> 3748 MUNFORD AVE <br /> STOCKTON CA 95205 <br /> RE: Hendrix Transport, Inc. IN REPLY REFER TO SITE CODE: 1694 <br /> 3730 Munford Ave. <br /> Stockton 95205 <br /> We have reviewed the laboratory report for the June 27, 1990, <br /> sampling of monitoring well 11. The analytical results indicate <br /> that toluene (4 . 3 parts per billion (ppb) ) is present in the <br /> groundwater beneath the above referenced site. In June of 1986, <br /> the analytical results from groundwater samples indicated much <br /> higher levels of contamination, [benzene (382ppb) ; toluene <br /> (115ppb) ; and xylene (58.3ppb) ] . <br /> As stated in the June 11, 1991, San Joaquin County Public Health <br /> Services, Environmental Health Division (PHS/EHD) correspondence, <br /> the extent of the migration of gasoline related constituents in the <br /> groundwater, and the groundwater gradient are not known at this <br /> time. <br /> It is possible that these contaminants may have migrated to and <br /> impacted the drinking water wells near the tank site. Additional <br /> groundwater monitoring wells and sampling analysis are required to <br /> determine the lateral and vertical extent of hydrocarbon <br /> contamination. <br /> In addition to the required wells, and pursuant to Section 2652 (d) <br /> of the Underground Storage Tank Regulations (California Code of <br /> Regulations, Title 23, Subchapter 16) quarterly monitoring reports <br /> shall be submitted to PHS/EHD and to the Central Valley Regional <br /> Water Quality Control Board (CVRWQCB) until the investigation and <br /> cleanup of the site is deemed adequate. Laboratory results alone <br /> are insufficient. They must be incorporated into a complete report <br /> which characterizes the site to the extent possible with the given <br /> data. All quarterly reports are to include the following <br /> information: <br /> -status of investigation and cleanup activities including <br /> the results of all investigations completed to date; <br /> -proposed continuing or next phase of investigation; <br /> -method of cleanup proposed or implemented, schedules for <br /> the completion of the investigation of the site and <br /> remediation; <br /> A Dnision of Sart Joaquin County ffcalth Care services �� <br />