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t _ <br />Morita Brothers Service Station 3 January 23, 1992 <br />IF �`►.r <br />I <br />All sampling equipment was washed with TSPTm (tri -sodium phosphate) <br />cleanser, pre -rinsed with tap water and a final rinse of de -ionized water prior to <br />sampling. <br />4.0 ANALYTICAL METHODS <br />The four soil samples from beneath the 5,000 gallon underground unleaded <br />gasoline storage tank, and the 2,000 gallon underground premium unleaded gasoline <br />storage tank were submitted to Mobile Laboratories in Bakersfield, a State of <br />California Department of Health Services (DOHS) certified laboratory. The soil <br />samples were analyzed for total purgeable hydrocarbons (TPH) as gasoline using the <br />California DOHS Luft Method for gasoline, and for the gasoline constituent volatile <br />aromatics, benzene, toluene, ethylbenzene, and total xylenes (BTEX) using USEPA Test <br />Method 8020. The eight soil samples from beneath the 5,000 gallon underground <br />leaded gasoline storage tank, from beneath the product pipelines and from the two <br />excavation stockpiles were submitted to B C Laboratories in Bakersfield, a State of <br />California Department of Health Services (DOHS) certified laboratory. The soil <br />samples were analyzed for total purgeable hydrocarbons (TPH) as gasoline using the <br />California DOHS Luft Method for gasoline, for the gasoline constituent volatile <br />aromatics, benzene, toluene, ethylbenzene, and total xylenes (BTEX) using USEPA Test <br />Method 8020, for EDB using USEPA Test Method 504, and for total lead using SW 6010. <br />The soil sample from beneath the waste oil tank was submitted to B C Laboratories <br />were it was analyzed for the presence of total purgeable hydrocarbons (TPH) as both <br />gasoline and diesel using the California DOHS Luft Method for gasoline and diesel, for <br />f the fuel constituent volatile aromatics, benzene, toluene, ethylbenzene, and total <br />xylenes (BTEX) using USEPA Test Method 8020, halogenated hydrocarbons using <br />USEPA Test Method 8010, for EDB using USEPA Test Method 504, for PCBs using USEPA <br />Test Method 8080, for total petroleum hydrocarbons as oil and grease using USEPA <br />Test Method 418.1, and for CAM Title 22 metals. Appendix A presents copies of the <br />analytical report and chain -of -custody sheet. <br />5.0 RESULTS OF SOIL SAMPLING <br />Total Petroleum Hydrocarbons (TPH) as gasoline were detected in sample PN -1 <br />at 3 feet beneath the north end of the product pipelines and adjacent to the northern <br />EB -8101-1 9201-EOSI.RPT <br />