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b 1 <br /> PUBTIC HEALTH SEIVICES OPpU�N C <br /> SAN JOAQUIN COUNTY <br /> N: t :< <br /> JOGI KHANNA M.D.,M.P.H. 'A <br /> Health Officer <br /> C4C%F pR N`P <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) Stockton, California 95201 <br /> (209) 468-3400 <br /> December 18, 1990 <br /> W. J. Hollis <br /> O • <br /> B.P. oil Company <br /> 2868 Prospect Dr. , Ste. 360 <br /> Rancho Cordova, CA 95670 <br /> RE: B.P. Oil 11192 IN REPLY REFER TO SITE CODE: 1995-123 <br /> 1403 Country Club <br /> Stockton, CA 95204 <br /> We have reviewed the Phase I Site Assessment (Preliminary <br /> Assessment Report - PAR) dated June, 1990. Four (4) monitoring <br /> wells were installed and sampled to assess the potential <br /> groundwater contamination. Benzene (33 parts per billion (ppb) ) , <br /> ethyl benzene (2. Oppb) , total xylenes (1.5ppb) , and total petroleum <br /> hydrocarbons (200ppb) were detected in monitoring well #3 . <br /> Sampling analysis from MW#1 also indicates that groundwater <br /> contamination is present. <br /> A work plan to define the extent of groundwater contamination <br /> should be submitted by February 15, 1990. Also due by February 15, <br /> 1990 is a second quarterly monitoring report as outlined in Section <br /> 2652 (d) of the Underground Storage Tank Regulations. These reports <br /> are to show the: <br /> -status of investigation and cleanup activities <br /> including the results of all investigations <br /> completed to date; <br /> -proposed continuing or next phase of investigation; <br /> -method of cleanup proposed or implemented, <br /> schedules for the completion of the investigation <br /> of the site and remediation; <br /> -monitoring well data including groundwater <br /> elevation, pH, conductivity, gradient; <br /> -analytical results of groundwater or soil sampling; <br /> and <br /> -a site map showing the "zero line" of <br /> contamination, if known, and changes in the above <br /> measurements over the last quarter. <br /> A Division of San Joaquin County Health Care Services 0 <br />