Laserfiche WebLink
PUB t'�IC HEALTH SER ICES �QaA�IN. <br /> SAN JOAQUIN COUNTY <br /> ENVIRONMENTAL HEALTH DMSION <br /> Karen Furst, M.D., M.P.H., Health Officer a•. P <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 FILE C 0 <br /> 209/468-3420 <br /> JOHN MAR GowsKl AUG 12 1998 <br /> WICKLAND OIL <br /> PO BOX 113648 r <br /> SACRAMENTO CA 95853-4648 <br /> RE: Wickland #R603 (former Regal Station) SITE CODE: 1211 <br /> 6425 Pacific Ave. <br /> Stockton, CA., 95207 <br /> San Joaquin County Public Health Services, Environmental Health Division <br /> (PHS-EHD) has reviewed the Western Geo-Engineers' July 9, 1998 "Request for <br /> I <br /> Closure Review with Update Status Report #52, May 1998 Quarterly Report" <br /> received on July 13, 1998 and discussed the site with Mark List of the Central <br /> Valley Regional Water Quality Control Board (CVRWQCB). <br /> Although uch work has been done at this site, the high levels of petroleum <br /> remaining)in the groundwater at II (TPH-G at 17,000 ug/I and Benzene at <br /> 140 ug/1) will require continued groundwater remedial efforts until lower <br /> concentrations of petroleum are achieved. <br /> I <br /> The CVRWQCB and PHS-EHD feel that remedial activities at this site are <br /> effective and are showing a marked decrease in the impact to the groundwater <br /> beneath the site. It is unfortunate that the completion of the remediation has not <br /> coincided'"With the ending of the lease Lincoln Properties currently holds for this <br /> site. When it can be shown that remediation is no longer effective in reducing <br /> the petroleum concentration, PHS-EHD will consider site closure. <br /> Reports submitted to PHS-EHD are to have all groundwater data (tables, iso- <br /> concentration maps, etc) reported in "ug/I" (ppb). The iso-concentration maps <br /> included in this Closure Report Request showed the groundwater plume <br /> concentrations of TPH-G and Benzene in "ppm" (mg/1) and tended to mislead the <br /> overall interpretation of the groundwater problem. Please update these figures <br /> and diagrams before submitting any groundwater evaluation report. <br /> Currently the depth to groundwater is at its highest level since the site <br /> investigation began. All but one of the existing monitoring wells (10), which <br /> is used for vapor extraction, have "drowned" screened intervals. If this poses a <br /> problem with the soil vapor extraction (SVE), adequate steps should be taken to <br /> either modify the system or install additional vapor extraction wells so that the <br /> required remediation can proceed. <br /> A Division of San Joaquin County Health Care Service <br /> !h <br />