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Table 4 - Groundwater Removal and Analytical Data <br /> Tosco(Former BP)Station No. 11195 <br /> 16500 South Interstate 5 <br /> Lathrop,California <br /> Date Purge Cumulative MtBE TPHg Benzene Toluene Ethyl- Xylenes MtBE <br /> Sampled Volume Purge Volume Removed Benzene <br /> or Purged in Gallons in Gallons by Well in Pounds (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) <br /> Total Volume Purged from MW-10 33,950 <br /> Total MtBE Removed from MW-10 5.16 <br /> TOTAL VOLUME PURGED 609,261 <br /> TOTAL MtBE REMOVED 66.00 <br /> EXPLANATION: <br /> ppb=parts per billion <br /> ND=Not Detected <br /> --=Not Applicable 1 Not Analyzed <br /> NOTE: All groundwater samples were collected during quarterly monitoring and sampling events,unless noted otherwise. Please refer to the quarterly Groundwater <br /> Monitoring and Sampling Reports for laboratory detection limits. <br /> =These samples were collected from the UST excavation and the two numbers were averaged for use in the MtBE removal calculations. <br /> =Groundwater samples after 1.2/12/00 were collected during quarterly monitoring and sampling events <br /> ANALYTICAL METHODS: <br /> TPHg=Total Petroleum Hydrocarbons as gasoline by EPA Method 8015 modified <br /> Benzene,Toluene,Ethylbenzene and Total Xylenes by EPA method 8021 <br /> MTBE=Methyl tert-butyl ether by EPA Method 8021/82608 <br /> MW Removed(lbs.)=MtBE concentration (ppb) *gallons removed* 8.337lbs/gal H201 1 x 10'ppb <br /> t 40[93.08 I 1 4/11/02 <br />