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-'WEGE- <br /> INTRODUCTION <br /> Regal 604 was operated as a gasoline service station by Wickland <br /> Oil Company. On Beptenber 26, 1968, five underground storage <br /> tanks were removed by Town 6 Country Construction Company. The <br /> excavated ®oil was field screened during the excavating process <br /> using a Photoionizing (Detector calibrated with a 25 ppm gasoline <br /> vapor standard (HWu PID) • Sealed upon the field screening the <br /> excavated soil was stae&piled into piles. Boil Pile (SP-1) , <br /> highest PID response, BP-2, moderate PXD response, SP-3, iow PID <br /> response and BP-4, low to no PID response. The piles were then <br /> covered and later sampled. <br /> Upon obtaining the initial chemical results of the sixteen samples <br /> obtained from approximately 400 cubic yards of excavated soil, <br /> (noted as BP-1) , high gasoline range total petroleum hydrocarbons <br /> (TPH-Q) were noted. The TPH-G ranged from 550 ppm in sample SP1-N <br /> to 1000 ppm in sample SP1-A with a mean of 29 <br /> The <br /> The relatively high concentrations in the SP-1 excavated soil pile <br /> along with the high benzene levels in the soil sample taken below <br /> tank 3 raised concern in the Ban Joaquin County Health Dept. The <br /> need to classify the excavated soil as to a hazardous or <br /> r nonhazardous material arose. <br /> •" LOCATION <br /> The site is known as Regal Station 604 and is located at 1448 N. <br /> E1 Dorado and Harding Way in Stockton, California. This site is <br /> in Ban Joaquin County and limas in projected section 2; TIN; R6E; <br /> -WDS&N at approximately 14 feet above mean sea level. In this area <br /> ground water can be located between 35,1 to 55,' feet below the <br /> surface, dependent upon the time of the year. Exploratory borings <br /> performed on December 1, 1989, encountered ground water between <br /> 470 and 460 below the surface. <br /> :LABSIFICATION AS TO HAZARDOUS OR NONHAZARDOUS MATERIAL <br /> PROCEDURES <br /> An outlined in the State of California, California Code of <br /> Regulations, Title 22. Social Security, Division 4. Environmental <br /> Health: Article 2, Scope and Procedures, section 66300. <br /> (Applicability) , section 66305. (Classification of a Waste as <br /> Hazardous or Nonhazardous) , and section 66310. (Variances. ) <br /> Article 9, Hazardous Wastes and Hazardous Materials, section <br /> 66680: t.umbers 101-Senzene, 320-Ethylbenzene, 355-Gasoline, 738- <br /> Toluene, and 776-Xylenes need to be tested for ignitable and all <br /> 2 <br />