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r • • <br /> Workplan for Additional Subsurface Investigation <br /> Former P.E.O'Hair Site, 1102 South Aurora Street,Stockton,San Joaquin County,California <br /> Page 3 <br /> end caps. <br /> Prior to drilling, permits will be obtained from the County and Underground Service Alert (USA)will <br /> be contacted for identification of buried utilities at or entering the project site from the public right-of- <br /> way. <br /> Direct push rod decontamination water will be minimal and containerized and removed off-site by the <br /> drilling subcontractor. In addition, direct push technology generates no drill cuttings. <br /> GROUNDWATER SAMPLE COLLECTION <br /> After soil sampling is completed, the probe pipes are removed and groundwater samples will then be <br /> collected from the borings. The fresh formation water entering the boring will be sampled directly <br /> from the Geoprobe® borings so no purging will be required. One groundwater sample will be <br /> collected from each of the five borings. <br /> Upon completion of groundwater sampling activities, the boreholes will be grouted to the surface <br /> with Portland cement. <br /> ANALYTICAL PROCEDURES <br /> The soil and groundwater samples will be transported under chain-of-custody documentation to a <br /> state certified analytical laboratory for analysis of <br /> Analysis Abbreviation I Designation USEPA Method No. <br /> Total Petroleum Hydrocarbons TPHg Aromatic 8015 Modred <br /> as Gasoline H drocarbon <br /> Benzene <br /> Toluene Tomatic <br /> Eth benzene BTEXlatile 8020 <br /> X enes otal anics <br /> Tertiary Butyl Alcohol TBA <br /> Methyl Tertiary Butyl Ether MTBE Five Fuel <br /> Diiso ro Ether DIPE Oxygenates <br /> Eth Tertia B Ether ETBE 82608 <br /> Tertiary Amyi Methyi Ether TAME <br /> 1,2-Dichloroethane 1,2-DCA Lead <br /> Ethylene dibromide EDB Scavengers <br />