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Monitoring Well and Sparge Points Installation Report—Former Unocal Station#2859,Stockton,CA
<br /> August 19,2002
<br /> CHEMICAL ANALYTICAL RESULTS
<br /> A total of seven soil samples from the well borings, one composite soil sample from the stockpiled drill
<br /> cuttings, and two groundwater samples were submitted under chain-of-custody for chemical analysts
<br /> Analyses were performed by Sequoia Analytical (FLAP #1271 and #1624) Copies of the laboratory
<br /> reports and chain-of-custody forms are included in Appendix F Soil and groundwater chemical
<br /> analytical data are summarized in Tables 2 and 3, respectively
<br /> Chemical Analytical Procedures
<br /> All soil and groundwater samples were analyzed for TPHg, BTEX, and MtBE by CA DHS LUFT
<br /> Methods Groundwater samples were also analyzed for ethanol, tert-butyl alcohol (TBA), MtBE,
<br /> di-isopropyl ether (DIPE), ethyl tert-butyl ether (ETBE), tert-amyl methyl ether (TAME),
<br /> 1,2-dichloroethane (1,2-DCA), and ethylene dibromide (EDB) by EPA Method 8260B As required by
<br /> the disposal facility, the stockpiled drill cutting's composite sample was analyzed for TPHg, BTEX, and
<br /> MtBE by CA DHS LUFT Methods, and total lead by EPA Method 6010B
<br /> Soil Analytical Results
<br /> TPHg, BTEX, or MtBE were not detected in soil samples from the well borings
<br /> Groundwater Analytical Results
<br /> TPHg, benzene, ethanol, TBA, DIPE, ETBE, TAME, 1,2-DCA, or EDB were not detected in wells
<br /> MW-20 and MW-21 MtBE was not detected in the wells by EPA Method 8260B
<br /> WASTE DISPOSAL
<br /> Soil cuttings generated during drilling activities were stockpiled on-site, and were placed on and covered
<br /> with plastic Composite disposal confirmation sample SP-I-A,B,C,D was collected from the stockpiled
<br /> soil cuttings (Table 2) Stockpile sampling procedures are presented in Appendix A The stockpiled soil
<br /> cuttings were removed from the site by Manley and Sons Trucking Inc and transported to Forward
<br /> Landfill in Manteca, California, on April 26, 2002 for disposal A copy of the disposal confirmation
<br /> form is included in Appendix B
<br /> OZONE MICROSPARGE SYSTEM
<br /> C-SpargeTM wells SP-lA, SP-1B, SP-1C, SP-2A, SP-213, SP-2C, SP-3A, and SP-3B were connected to an
<br /> ozone microsparge system System operation began on August 14,2002
<br /> The system will be evaluated based on groundwater sample analytical results from wells MW-2, MW-10,
<br /> MW-11, and NP-1 The samples will be analyzed for TPHg, benzene, toluene,ethylbenzene, and xylenes
<br /> (BTEX), and MtBE by CA DHS LUFT Methods
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