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i <br /> P`J <br /> ATC Associates Inc. <br /> 1117 Lone Palm Avenue, Suite 201 <br /> Modesto, California v 1 209-579-222-2221 <br /> Fax: 209-579-2225 <br /> inside the hollow push rods until it is immersed in groundwater, the bailer valve is closed and <br /> the grab groundwater sample is drawn up to the surface. Only one grab groundwater <br /> sample is obtained per boring. If a groundwater sample is required to be collected at a <br /> different depth, the location of the CPT rig must be adjusted to advance the next boring/ <br /> away from the others previously advanced. <br /> If dissolved phase hydrocarbons are indicated in the proposed hydropunch location north of <br /> eastern Second Street driveway monitoring well MW-2, ATC has made provisions for a third, <br /> step out boring at location in the driveway of the former Madsen Property. If indicated, two <br /> additional Hydropunch borings will be advanced at this location and groundwater samples <br /> collected at the depths identical to the other borings. <br /> Following groundwater sample collection, the void created by the borings will be backfilled <br /> with neat cement grout to the ground surface. Investigative derived wastes (IDW) will be <br /> stored on site in 55-gallon drums pending laboratory results. The IDW will be disposed of <br /> off-site pending laboratory results. J <br /> i <br /> All work described in this workplan will be performed under the direction of a California <br /> Registered Professional Engineer or Professional Geologist. All fieldwork will be completed <br /> in accordance with ATC's Site Specific Health and Safety Plan (HASP) and Quality <br /> Assurance/Quality Control (QA/QC) Plan. The HASP and QA/QC plan will be maintained <br /> onsite by ATC field personnel during subsurface investigation activities. <br /> Disposal of Investigative Derived Wastes <br /> As stated above, any drill cuttings generated will be stored on site in a 55-gallon drum <br /> pending laboratory results. The soil analytical results will be used to profile the soil cuttings <br /> for disposal. Soil cuttings will be managed in accordance with State of California and EHD <br /> guidelines that will include waste profile characterization and disposition at a State permitted ? <br /> landfill or hazardous waste Transfer, Storage, or Disposal (TSDF) facility. ,1 <br /> Report Preparation <br /> Approximately four to six weeks after the completion of;field act' (ties, ATC will submit a <br /> report describing the field activities and laboratory analytical results and will include an <br /> assessment of the extent of the petroleum hydrocarbon release along with <br /> recommendations. <br /> This report will also include the following items as agreed-to in the on-site meeting held on <br /> December 2, 2009: pok -reA C 4 8MA 4ufxj I SP) 4 �y <br /> • An estimate of them ass of hydrocarbons present in the subsurface. �J ' <br /> • A demonstration, if applicable, that the dissolved phase plume is stable and/or <br /> shrinking. <br /> 4 <br />