Laserfiche WebLink
L S.01 <br /> Ld sampling Iocations may be moved due to access restrictions, presence of utilities, and/or <br /> sample results. At each sampling location, we will attempt to collect soil gas samples at <br /> depths of 15, 30, and 45 feet bgs. The three sampling depths were selected to provide <br /> data that could eventually be used for the design of a soil remediation system, if further <br /> remediation is deemed necessary. <br /> V <br /> A direct-push hydraulic or percussion drive-point sampling system will be <br /> employed to collect the soil gas samples. At the prescribed interval, the drive rods will <br /> be slightly retracted to expose the slotted portion of the expendable drive-point. Tubing, <br /> lowered down the drive train as they are being advanced, will be evacuated prior to <br /> V <br /> collecting the gas sample. The collected gas sample will be analyzed for BTEX using <br /> EPA Method 8020, and for TPH using EPA Method 8015 modified. <br /> I� <br /> At the request of PHS/EHD, soil samples will be collected as confirmation of soil <br /> gas analytical results. Soil samples will be collected at 3 of the 10 soil gas sample <br /> ry <br /> locations (adjacent to Tanks #1, #2 and #3) at depths of 15, 30, and 45 feet bgs to <br /> verify the results of the soil gas survey. These soil samples will also serve to further <br /> characterize possible sources at these locations. <br /> 4 <br /> A direct-push hydraulic or percussion drive-point sampling system will be <br /> employed to collect the soil samples. At the prescribed interval, the drive rods will be <br /> Ld retracted and a split barrel sampler will be sent downhole to collect an undisturbed soil <br /> sample. All soil samples will be sent to a state certified offsite lab and will be analyzed <br /> t, for BTEX using EPA Method 8020, and for TPH-g using EPA Method 8015 modified. <br /> Soil samples collected adjacent to Tank #3 will also be analyzed for TPH-d and TPH-k. <br /> In the event that soil gas samples are unable to be collected at any of the proposed <br /> sample locations (e.g., due to low air permeability), it is proposed that soil samples be <br /> ti. collected and analyzed for BTEX and TPH. <br /> R4182OA-625960-5 <br /> soilvap2.pin 5 <br /> 6+ <br />