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Groundwater Sampling <br /> Monitoring well MW-1 was sampled on December 21, 2000, (inadvertently marked <br /> MW-3 in the attached field sheet and chemical analysis) The well was purged using <br /> calculated well volume based upon the depth to water in the casing Depth to <br /> groundwater measurements were made to the nearest one-one hundredth of one foot, and <br /> the well was checked for the presence of separate phase product The well was purged to <br /> remove stagnant water in the well casing As each purge volume was removed, <br /> measurements of pH, electrical conductivity and temperature were taken until these <br /> parameters stabilized over two purge volume removals, which are interpreted to represent <br /> aquifer water entering the casing The well was allowed to recover to about 80% of the <br /> initially measured water level, after which the sample was collected <br /> The water sample was carefully collected with a clean bailer and poured into the <br /> appropriate laboratory prepared container with minimum cavitation The water sample <br /> was labeled, logged onto a chain-of-custody form, and placed in a chilled ice chest Upon <br /> completion of well sampling, the well was sealed with an expansion plug and well box <br /> cover bolted down <br /> Groundwater Gradient <br /> Water levels were measured in the Tracy Auto well in Grant Line Avenue and additional <br /> water level measurements were collected on the Gemelos Property and More for Less <br /> Station Property (see Figure 1) Water level data was collected from the wells on <br /> December 21, 2000 The groundwater flow gradient is flowing north northeasterly at a <br /> calculated gradient of 0 006 Water levels have risen since the previous sampling <br /> Chemical Analysis <br /> One (1) groundwater sample was analyzed at a State certified analytical laboratory from <br /> the exploratory boring These samples were chemically analyzed for the following, Total <br /> Petroleum Hydrocarbons as Gasoline (TPHG), Benzene (B), Toluene (T), Ethylbenzene <br /> (E) and Xylene (X), Methyl-tert-butyl-ether (MTBE) and fuel oxygenates, 1,2 <br /> Dichloromethane and Ethylene Dibromide using EPA Methods 3510/8015, 8020, 8240 <br /> and 8260 The analyses were performed on a "normal" turnaround The results are <br /> attached and presented in Table 2 below <br /> The contract sampler inadvertently marked the sample "MW-3" although the proper well <br /> Tracy Auto Stereo monitoring well designation is MW-1 <br /> Page 2 <br />