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MAY-05-00 09 :28 AM DIETZ IRRIGATION 209 833 1288 P. 02 <br /> +, <br /> THE SAN JOAQUIN COMPANY Inc, <br /> 8617 Etcheverry Drive, Tracy, California 95375 <br /> e <br /> Procedure for Groundwater Sampling <br /> 7500 W 111h Street <br /> ' Tracy, California <br /> 1. Remove monitoring well covers on all seven monitoring wells. <br /> 2. Measure groundwater level in all wells using water Ievel meter and reference to top of <br /> 2 inch PVC casing. Mark with Marks-A-Lot the location used as a reference on the <br /> casing. <br /> 3. Using a 2 inch submersible pump purge each well removing 10 to 15 gallons per well, <br /> Place purge water in a drum and label with the monitoring well number. Do not mix <br /> purge water. <br /> 4. Allow all wells to recover prior to sampling. This should require approximately 30 <br /> minutes. <br /> 5. Using a dedicated baler sample each well. Fill four voas(no air bubbles allowed)and <br /> one amber jar per well. <br /> i <br /> 6. As each well is sampled label all glassware and enter sample numbers into the Chain <br /> of Custody. <br /> 7. Place samples in ice chest with blue ice in preparation for transport to the laboratory. <br /> i <br /> 8. Replace monitoring well plugs and replace monitoring well covers. <br /> 9. Water from each monitoring well is to be analyzed as follows: <br /> Analyte Acronym <br /> Total Petroleum Hydrocarbons(Quantified as Gasoline) TPH(g) <br /> Benzene B <br /> Toluene T <br /> Ethyl Benzene E <br /> Total Xylene Isomers X <br /> Total Petroleum Hydrocarbons(Quantified as Diesel) TPH(d) <br /> Tertiary Butyl Alcohol TBA <br /> Methyl Tertiary Butyl Ether QBE <br /> Di-isopropyl Ether DIPE <br /> Ethyl Tertiary Butyl Ether ETBE <br /> Tertiary Amyl Methyl Ether TAME <br /> 1,2 Dichloroethane 1,2 DCA <br /> Ethylene Dibromide EDB <br /> Total Lead Pb <br /> i <br /> Telephone: Tracy,California 209-832.2910 Albany,California 510-527-5515 <br />