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FINAL SITE 47 SOIL SAMPLING WORK PLAN <br /> PORT OF STOCKTON-ROUGH AND READY ISLAND,CALIFORNIA <br /> 3.3 TASK 3: GRAB GROUND WATER SAMPLING <br /> At three locations, the boring will not be terminated when saturated soil is first encountered, <br /> but will be advanced an additional three to four feet to allow a grab ground water sample to be <br /> collected. Two of the three locations will be borings S47-B1 and S47-1310, at each end of the <br /> proposed rail alignment, and the third grab ground water sample will be collected from boring <br /> S47-136, near the center of the alignment. The grab ground water samples will be analyzed for <br /> dissolved arsenic by EPA Method 6020. <br /> 4. REPORT <br /> The results of this investigation will be used to guide soil grading and amendment operations <br /> that are necessary for the construction of the proposed rail facility. The intent is to prevent soil <br /> that exceeds the background concentration of 30 mg/kg (DTSC, 2015) from being entombed <br /> beneath the newly-constructed rail. Greater definition of the distribution of arsenic in the area <br /> will identify areas where more or less soil is required to be removed in order to meet this goal. <br /> The results of the sampling and analyses proposed in this Work Plan will be described in a <br /> technical memorandum prepared within 30 days of receipt of the laboratory data. <br /> March 2015 4 Environmental Risk Services �` <br /> Corporation .e. <br />