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.PUBNC HEALTH $EkVICES <br />SAN JOAQUIN COUNTY <br />JOGI KHANNA M.D., M.P.H. i! <br />Heath Officer <br />P.O. Box 2009 . (1601 East Hazelton Avenue) . Stockton, California 95201 <br />(209) 468-3400 11, <br />December 26, 1990 <br />Lon Kitagawa <br />B.P. Chemicals <br />3437 S. Airport <br />C�Op�I <br />Stockton, CA 95206 <br />Ij <br />RE: B.P. Chemicals IN REPLYijREFER TO SITE CODE: 2042 <br />3437 S. Airport �; <br />Stockton, CA 95206 <br />San Joaquin County Public Health Services, ,;Environmental Health <br />Division (PHS/EHD) has reviewed your Soil§Sampling Work Plan dated <br />October 16, 1990. In the introduction of the Work Plan it states <br />that four samples were taken from the bottom of the tank excavation <br />on June 26, 1990 and that B.P. Chemicalsllsubsequently submitted a <br />report to our office. We did not receive ,this report or comment on <br />.� <br />On July: 31, 1990, a Leaching Potential' Analysis Worksheet was <br />completed for your site using the results submitted by California <br />Water Labs on the soil sampled February -1123, 1990, following the <br />underground tank removal. Xylene was detected at 92,000 parts per <br />billion -(ppb) which is above the level of contamination, for this <br />gasoline" constituent, that may be allowed to remain in the soil <br />given your site conditions according to th6 worksheet. It was also <br />noted that the detection limitsused by the laboratory for benzene, <br />toluene,;ethylbenzene and total petroleum1�hydrocarbons as gasoline <br />on these soil samples were not as sensitive asIthe detection limits <br />listed in the LUFT field manual so the results do not reflect the <br />information needed to make a good assessment of the contamination <br />at the site. <br />On August 2, 1990, we mailed you a copy of the Tri --Regional <br />Recommendations and Appendix A for guidance in submitting a re - <br />excavation plan. The Work Plan you submitted lacks information. <br />The following items are to be addressed, in�an addendum to the <br />submitted Work Plan by January 21, 1991.1' <br />1. Provide a drawing of the tank jexcaIva tion and show the <br />proposed amount of further excavation. State the total <br />amount of soil to be excavated. Show the proposed <br />sampling locations in the excavation (sidewall and <br />bottom) and on the stockpiled soil. <br />A ]Division of San Joaquin County Healch Care Services 0 <br />