Laserfiche WebLink
WATERWQRK ir <br /> GEOCHEMICAL•GEOTECHNICAL ENVIRONMENTAL <br /> January 20, 1989 <br /> i <br /> 1 Uz <br /> Ms . Laurie Cotulla <br /> San Joaquin Local Health District JAN <br /> Environmental Health <br /> P .O. Box 2009 Eitt`rli:�� +_�H <br /> I�1 r«.��I i�E.�vlc:s <br /> Stockton, CA 95201 <br /> I <br /> Re : Subsurface contamination-Stephens Marine Inc. , 4950 W. <br /> Brookside Road, Stockton, CA <br /> Dear Ms . Cotulla: <br /> Please find the enclosed Preliminary Report, permit applications <br /> and permit fees for the above referenced shite . We have submitted <br /> a copy of this report to Gordon Boggs ait the Central Valley <br /> Regional Water Quality Control Board , <br /> Three tanks were removed from the site and a pit excavated for <br /> installation of new double wall tanks . A watei sample collected <br /> from the bottom of the pit excavated for JJIthe yew tanks reported <br /> 5 . 9 parts per million total petroleum hy'roc�arbons . The soil <br /> samples from the old tank pit, which werie collected below the <br /> winter water table, indicate the source i of the water <br /> contamination. l <br /> Although the water table depth is difficult to define due to <br /> fluctuations in response to tides and the stage of the San <br /> Joaquin River, we estimate that during a normal year the winter <br /> water table is approximately 6 feet below �grad�e and is less than <br /> 4 feet in wet years . <br /> We have proposed in the Preliminary Report to drill shallow soil <br /> borings around the tank pit to definethe shallow soil <br /> contamination and to remove any cantamin�ated soils above the <br /> water table from the tank pit . Sampling ollf the excavation walls <br /> above the water table will be performed t16 define contamination <br /> in the near surface soil . This materials will be removed and <br /> -remediated on-site . We believe that thelmaj�ority of the soil <br /> contamination is below the water table and will be treated as <br /> part of the groundwater remediation. A Ilseries of monitoring <br /> wells will be utilized to define the extent of groundwater <br /> contamination: <br /> The installation of the new tanks at this site will not interfere <br /> with either the delineation or clean-upobi contamination at this <br /> site . At this time Stephens Marine iswi6hout fuel storage and <br /> 1710 MAIN STREET • ESCALON,CA 95320 • (209) 838-3507 <br /> FRESNO,CA(209) 222-3495 0 SAN LUIS OBISPO,CA(805)544-6586 RENO, NV(702) 788-6830 <br />