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Table 3 <br /> 2024 Groundwater Sampling Plan <br /> Rough and Ready Island, <br /> Stockton,California <br /> VOCS TPHg TPHd,mo Metals Radionuclides <br /> 2024 Monitoring Activities EPA EPA EPA Method Bio-geochemical EPA Method <br /> Well ID Area Operable Unit Site EPA Method <br /> Planned Method Method 6010B& Indicators cry 901.1,903.0, <br /> 8260B 8260B 8015B 7470A 904.0,and 900.0 <br /> W-311 N/A Site 50 Gauge <br /> W-312 N/A Site 50 Gauge <br /> W-313 N/A Site 50 Gauge <br /> Notes&Abbreviations: <br /> EPA=United States Environmental Protection Agency <br /> TPHd=total petroleum hydrocarbons as diesel <br /> TPHg=total petroleum hydrocarbons as gasoline <br /> TPHmo=total petroleum hydrocarbons as motor oil <br /> VOCs=volatile organic compounds <br /> (1)Biogeochemial parameters includes the following:field parameters(oxygen reduction potential,pH,dissolved oxygen,and specific conductance);nitrate,nitrite,sulfate,and chloride by EPA <br /> Method 300.0;iron and manganese by EPA Method 601013;total organic carbon by SM 5310B;methane,ethane,ethene,and carbon dioxide by EPA Method RSK-175;and alkalinity by APHA <br /> 2320B. <br /> (2)Monitoring well proposed to be installed in 2024.Well sampling will occur 72 hours following well development. <br /> Table 3—Groundwater Monitoring Plan_ 6 of 6 6/12/2024 <br />