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NOW <br /> WESTERN - 1386 EAST 13EAM,,R STREET <br /> -WEGE- GEO-ENGINEERS WOODLAND CA95776-6003 <br /> (530) 668-5300, <br /> CALIF.C01,FTI2ACT01t k513R57 " 7 ,� FAX(530)662.0273 <br /> REGISTERED GE0T,0G151-S wcge(a'modier.com <br /> Ms. Kasey Foley. February 23, 1999 <br /> Leaking Underground Fuel Storage Tank Program <br /> San Joaquin County Public Health � _,�rp <br /> Environmental Health Division(PHS-EHD) iY (ice'- "�- <br /> 304 East Weber Ave., Third Floor <br /> Stockton, CA. 95202 rN <br /> (209)468-3451 <br /> RE: Workplan for obtaining confirmation soil samples beneath UST's obtained by slant borings at <br /> Former Regal Station, located at 6425 Pacific Avenue, Stockton, California 95207. <br /> Dear Ms. Foley: <br /> INTRODUCTION <br /> This Workplan is being submitted at your request to describe the methods that will be used to <br /> obtain confirmation soil samples beneath the three 10,000-gallon double-walled fiberglass UST's. <br /> A Corrective Action Plan (CAP) has been approved by Mr. Mike Infurna for any over-excavation <br /> of contaminated soil that may be discovered from the sampling of the UST area and associated <br /> product dispensing piping/dispensers. Confirmation soil sample borings near the UST area, <br /> ongoing groundwater monitoring and vapor extraction monitoring indicated that the soils beneath <br /> this site have been remediated (contamination has been removed) and that no further actions are <br /> necessary. <br /> Wickland Properties has permitted the removal of the 3-10,000 gallon underground storage tanks <br /> and associated piping. Negotiations with Lincoln Village Properties (site property owner) may <br /> facilitate leaving the three UST's in place. These empty tanks and associated piping, installed in <br /> January 1989, are double walled fiberglass composition and had contained/dispensed unleaded <br /> regular and unleaded premium gasoline. EXXON removed the dispensers and all fluids from the <br /> piping and the UST's when they vacated the property in July 1998. <br /> UST DOCUMENTATION SAMPLING <br /> Soil samples will be collected from representative native soils beneath the UST's invert (tank's <br /> bottom) between 2 and 4 feet into native soil using a truck mounted hollow stem auger drilling rig. <br /> One soil sample will be obtained from each end of each UST, for a total of six soil samples, see site <br /> map - Figure 3 and cross sections - Figure 4. <br /> 1 R-603 UST WP 2/23/99 <br />