Laserfiche WebLink
PUBLIC HEALTH SERVICES <br /> SAN JOAQUIN COUN <br /> JOGI KHANNA M.D.,M P.H. <br /> Health Officer <br /> P.O. Box 2009 • (1601 East Hazelton Avenue) • Stockton, California 95201 eq 4 <br /> (209) 468-3400 <br /> GARY BROPHY .�j <br /> 1235 SLAYTON DRIVECC, I I JUN 17 1992' <br /> MANTECA CA 95336 <br /> RE: 941. E. Yosemite SITE CODE: 1461 <br /> Manteca, CA <br /> San Joaquin County Public Health Services, Environmental Health <br /> Division (PHS/EHD) has reviewed the letter response from RESNA <br /> Industries concerning the sampling frequency at this site. <br /> Until PHS/EHD deems the investigation at this site complete, <br /> quarterly status reports must be submitted pursuant to Section <br /> 2652 (d) of the Underground Storage Tank Regulations (California <br /> Code of Regulations, Title 23, Chapter 16) . <br /> I <br /> Although the number of wells to be sa pled or the sampling <br /> frequency may be reduced, depending oi site conditions, a status <br /> report must still be submitted to this office on a quarterly { <br /> basis. The report should include pas and current sampling and F <br /> depth to water data and gradient information. As stated in the <br /> letter to you from this office dated April 6, 1992, the <br /> monitoring wells at this site need to be sampled at least bi- <br /> annually, or two times a year. The data. gathered from the <br /> groundwater monitoring program is needed to monitor groundwater <br /> trends and contaminant concentrations. Over time, it should show <br /> or prove that natural biological degradation is in fact occurring <br /> at this site. <br /> For clarification, maximum contaminant levels established by the <br /> State of California are not clean-up levels that justify closure <br /> for underground storage tank sites. 3efore this office can <br /> consider your site for closure, it must be shown that the quality <br /> of the groundwater beneath your site aas been fully restored to <br /> non-detect levels of contamination. Et must also be shown, with <br /> physical data, that the groundwater will not be impacted in the <br /> future by any residual soil contamination resulting from the <br /> vertical fluctuations of the water table. <br /> The remedial alternative of over-excavation with post remedial <br /> groundwater monitoring chosen for this site to mitigate the soil <br /> and groundwater contamination may taka a substantial amount of <br /> time to resolve to the point of closure certification. If <br /> closure certification is required soo er than this alternative <br /> will achieve, a more active remedial ilternative should be <br /> considered. <br /> G <br /> A Division of San Joaquin County Health c afe SerNces <br />