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August 2,2017- <br /> San Joaquin County Environmental Health <br /> Page 2 of 3 <br /> Reference: 7-Eleven Store#39208 <br /> 25460 South Schulte Road <br /> Tracy,California <br /> SOIL SAMPLING <br /> Stantec will supervise the advancement of up to 12 direct push soil borings (B-1 through B-12) at <br /> the locations depicted on Figure 1.The proposed soil borings will be advanced to a maximum <br /> depth of 20 feet logs.The borings will be advanced using a truck-mounted rig equipped with a <br /> two-inch outer diameter Macro Core@ sampling device.Soils will be continuously logged to <br /> record lithology, and samples will be collected for laboratory analysis at five-foot intervals. <br /> Additional samples will be collected for laboratory analysis if evidence of significant petroleum <br /> hydrocarbon impacts is observed. Down-hole equipment will be cleaned before advancing each <br /> boring, and sampling equipment will be cleaned between each sampling interval. Each soil <br /> sample will be screened for hydrocarbon vapors using a portable photoionization detector (PID). <br /> Soils encountered during drilling will be logged by a Stantec field geologist using the Unified Soil <br /> Classification System (USCS),working under the supervision of a California Professional Geologist. <br /> Soil samples will be collected from the continuous core liner and sealed with Teflon®sheeting and <br /> plastic caps.The soil samples will then be labeled and placed on ice in an insulated container for <br /> delivery to a state-certified laboratory under appropriate chain-of-custody (COC) <br /> documentation.Selected soil samples retained for analyses will be analyzed for benzene, toluene, <br /> ethylbenzene, and xylenes (BTEX), gasoline-range organics (GRO), naphthalene, methyl tertiary <br /> butyl ether (MtBE), tert-butyl alcohol (TBA), tertiary-amyl methyl ether (TAME), diisopropyl ether <br /> (DIPE), and ethyl tert-butyl ether (ELBE) by Environmental Protection Agency (EPA) Method 82608. <br /> Following collection of the soil and grab groundwater samples, each boring will be tremie grouted <br /> from total depth grade with neat cement. <br /> WASTE HANDLING AND STORAGE <br /> Any soil and waste generated during the advancement of the soil borings will be placed in <br /> Department of Transportation approved 55-gallon drums on site pending characterization and <br /> disposal. <br /> Prior to disposal, a four-point composite soil sample will be collected from the soil drums and <br /> placed on ice in an insulated container for delivery to the laboratory.The soil sample will be <br /> analyzed for TPHg, BTEX, and MtBE by EPA Method 82608 and total lead by EPA Method 6010B. <br /> Design with community In mind <br />