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F <br /> PAPAW-� <br /> Working to Restore Nature <br /> 1710 Main Street <br /> Escalon, CA-95320 ��;��z��-•���� ' <br /> Phone:(209)838-3507 AUG192. <br /> FAX: (209)838-3509 <br /> V;�}1�4 R•ON M EN L �-rAEA`�i August 10, 1992 <br /> if# � 4� <br /> Mr. Michael Infurna <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> f <br /> Stockton, CA 95201 <br /> RE: Pestana Trust, Reeves Exxon, 2360 East Rd: Tracy, CA, Site Code #1397 <br /> a <br /> I <br /> Dear Mr. Infurna: <br /> In correspondence dated April 29, 1992 from the San Joaquin County Public Health Services <br /> (PHS/EHD) the Pestana Trust was directed to propose remediation alternatives for petroleum <br /> hydrocarbon contamination at -the.site. Since the extent of-groundwater contamination has not <br /> been completely''defined RESNA , cannot make firm"'recommendations about remediation <br /> alternatives at this time. RESNA does recommend the installation of oneaiditional monitoring <br /> well in the downgradient direction (in a northeasterly direction from:the-former-tank pit) to <br /> attempt to define the downgradient limit of groundwater contamination. Ani adder endto the <br /> workplan dated September 18, 1991,1991, proposing the installation of this additional well- will be <br /> s mitted to your office within—3 0 days. <br /> Remediation alternatives being explored for the referenced site are as follows: <br /> • Excavation of all contaminate_ d soils,.stockpiling soils on site in a bermed area . <br /> pending laboratory.-an-alysis for disposal to anappropriate appropriate facility. _Pumping . <br /> groundwater into Bal ernFtakT_as it recharges into the excavation with <br /> bioremediation of the groundwater inthe Baker tanks, then pumping the "clean" <br /> water into the City sewer (under permit) if possible. This technique would serve <br /> to remove sources of contamination and to pull the contamination plume back to l <br /> the site. <br /> • A second option would be to exc avate t1�e so of contamination (soils), and <br /> `install a, horizonta7exfraction system in the excavation which would'theri'lie� <br /> RF-"0792.LF <br /> 3 <br /> 1 <br />