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�.. %Nov, <br /> Project 113-26, Work Plan Page 3 <br /> SITE PLAN <br /> A site plan map is attached that indicates the locations of the existing monitoring <br /> wells and the proposed soil borings around the old tank excavation (Figure 2). <br /> The tasks of the work plan and an estimate for the schedule of the project follow. <br /> TASK 1 -DEVELOP WORK PLAN AND SITE SAFETY PLAN <br /> The site safety plan, included with this work plan (see attachment), will be on-site <br /> during all field activities. An underground locating service will be employed to <br /> identify underground utilities and other possible subsurface obstacles. A minimum <br /> of Level D safety equipment is required for all field activities. The work plan will be <br /> submitted to the San Joaquin County Environmental Health Division and Regional <br /> Water Quality Control Board. <br /> TASK 2-REMOVE FREE PETROLEUM PRODUCT <br /> At this time free petroleum product is in MW-4. A passive petroleum 'trap' will skim <br /> the free product off the groundwater surface. The trap fits in the 2" well and can <br /> remove product down to a sheen Water is prevented from entering the trap by a <br /> hydrophobic barrier. The trap will be emptied as necessary into a separate 55 gallon <br /> steel drum. This drum will be clearly marked so that development, purge or wash <br /> water is not placed in the drum. <br /> TASK 3-DRILL SOIL BORINGS <br /> Parker Environmental staff, under the supervision of a state-registered geologist, A,>�PV-4- <br /> James A. Jacobs, will supervise the drilling of the possible well installation by West (mss <br /> Hazmat, a state-licensed well driller and the five borings by Artesian Environmental NO <br /> Consultants. The standard operating procedures for drilling soil borings and <br /> obtaining soil samples are included in the Attachments. If a well is needed to replace <br /> MW-2, the new well will be within 5 feet of the old well. The old well will be <br /> abandoned according to standard industry procedures. The proposed soil borings will <br /> be drilled into native soils. The proposed location of the soil borings may have to be <br /> adjusted according to drill-rig accessibility, underground utilities or obstacles. <br /> Soil samples will be collected from the boring at approximate intervals of every 5.0 <br /> feet, for lithologic and hydrologic characterization, and for possible chemical analysis. <br /> The samples will be screened with an organic vapor analyzer (OVA) or a <br /> photoionization detector (PID) to be qualitatively evaluated for the concentration of <br /> volatile hydrocarbons that may be present. This screening will aid in the selection of <br /> the soil samples to be analyzed in a state-certified lab for TPH-g and for BTEX. Parker <br /> standard operating procedures for collecting organic vapor data are described in the <br /> Attachments. <br /> Parker Environmental Services, 4185 Rialto Court, Pittsburg, CA 94565-6116 <br /> Phone (510) 439-1024 Fax (510) 439-2566 <br />