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� s <br /> Interim Results Report for Ozone Sparge Well Installation <br /> Moore Petroleum Bulk Plant,5491 F Street,Banta,California <br /> Page 5 <br /> An eight-inch borehole was advanced to approximately 25 feet below ground surface (bgs) using <br /> hollow stem auger drilling equipment. Soil samples were collected at 5-foot intervals for <br /> classification, field screening and chemical analysis. Soil samples were classified by the Unified <br /> Soil Classification System. Boring logs detailing the construction and lithology encountered <br /> during drilling, are included. as Appendix C. A minimum of one soil sample was selected from <br /> each sparge well boring for analysis. Sol] samples were submitted for chemical analysis under <br /> chain-of-custody to California Laboratory Services of Rancho Cordova, California, a state- <br /> certified laboratory(Appendix D). Field screening consisted of soil headspace analysis using a <br /> portable photoionization detector. <br /> One sparge point was installed per boring. The sparge point consisted of an 18-inch Iong by 2- <br /> inch diameter diffuser. A3/4-inch diameter Schedule 40 PVC riser was connected to the diffuser <br /> and extended to surface. The filter pack was placed from one foot below each diffuser to two <br /> feet above. A two foot thick bentonite seal was placed on top of the filter pack. A neat cement <br /> sanitary seal was placed from the top of the bentonite seal to two feet bgs. The wellheads were <br /> secured with a locking, water-tight cap and a traffic-rated wellhead vault box which was installed <br /> flush with the ground surface. Well construction details are summarized in Table 1. <br /> A summary of analytes and analytical methods used is shown below. <br /> Anal sis Abbreviation Designation USEPA Method No. <br /> Total Petroleum Hydrocarbons TPHg <br /> as Gasoline <br /> Total Petroleum Hydrocarbons TPHd Gas/Diesel- <br /> as Diesel <br /> Total Petroleum Hydrocarbons Range 8015 Modified <br /> Kerosene Hydrocarbons <br /> as Kerosene <br /> Total Petroleum Hydrocarbons TPHmo <br /> as Motor Oil <br /> Benzene Aromatic <br /> Toluene BTEX Volatile 8021 <br /> Eth Ibenzene <br /> Xylenes (Total) Organics <br /> Tertiary Butyl Alcohol TBA <br /> Methyl Tertiary Butyl Ether MTBE Fuel <br /> Di-isopropyl Ether DIPE Oxygenates 82606 <br /> Ethyl Tertiary Butyl Ether ETBE <br /> Tertiary Amyl Methyl Ether TAME <br />