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Additional Information for Motoril Delineation <br /> Moore Petroleum Bulk Plant,5491 F Street,Banta,California <br /> Page 2 <br /> Weed oil is a petroleum based blend made by combining motor oil, water, and a <br /> surfactant (such as detergent). Also included in the weed oil, to a lesser extent,were <br /> compounds such as dinitro amyl phenol, dinitro butyl phenol, and pentachlorophenol, <br /> which were used as fortifiers for the weed oil. Weed oil was previously used as a weed <br /> suppression and eliminating agent. Weed oil was banned from manufacturing and use in <br /> 1970. <br /> ADDITIONAL SAMPLING <br /> Due to this recent information supplied by Mr. Moore, Apex proposes to determine if the <br /> dissolved phase TPHmo reported in groundwater samples collected from boring CPT-2 is <br /> actual or is weed oil by analyzing additional samples collected from the area around <br /> boring CPT-2 at a depth of 30 feet (below ground surface)bgs, sample location shown on <br /> Figure 3. Samples will be collected by advancing an auger to a depth of 30 feet bgs and <br /> using a hydro punch to collect a groundwater sample from 30 to 32 feet bgs. The <br /> groundwater sample will be analyzed for the following analytical suite list: <br /> Analysis Abbreviation I Designation I USEPA Method No. <br /> Total Petroleum Hydrocarbons—F TPHg <br /> as Gasoline <br /> Total Petroleum Hydrocarbons TPHd Gas/Diesel- <br /> as Diesel <br /> Total Petroleum Hydrocarbons Range <br /> as Kerosene Kerosene Hydrocarbons <br /> Total Petroleum Hydrocarbons TPHmo <br /> as Motor Oil <br /> Benzene 8260B <br /> Aromatic <br /> Toluene BTEX Volatile <br /> Eth (benzene Organics <br /> Xylenes (Total) <br /> Tertiary Butyl Alcohol TBA <br /> Methyl Tertiary Butyl Ether MTBE Fuel <br /> Di-isopropyl Ether DIPE Oxygenates <br /> Ethyl Tertiary Butyl Ether ETRE <br /> Tertiary Amyl Methyl Ether TAME <br /> dinitro amyl phenol DAP 8270 <br /> dinitro butyl phenol DBP Weed Oil <br /> 2-sec 4-butyl dinitrophenol dinoseb Fortifiers 8151 <br /> pentachlorophenol PCP 8270 <br /> REVISED MONITORING WELL INSTALLATION PLAN <br /> Due to the recent information, Apex proposes to proceed with the installation of <br /> monitoring well MW-15 at the originally proposed depth of 20 feet bgs. On April 25, <br /> 2007 Apex submitted an Environmental Right of Entry Agreement to Jon Devish of <br /> Union Pacific Railroad Company, and is currently awaiting a response. <br />