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ATC Associates Inc. 1117 Lone Palm Avenue, Suite 201 TC Modesto, California 95351 209-579-222-2221 CV)AFax:209-579-2225 " ASSOCIATES INC . SCOPE OF WORK Planning and Permits Once approval of this workplan is received, ATC will submit a boring permit application to the EHD as well as the encroachment permit from the City of Ripon and submit them along with the required fees. At least 48 hours prior to advancing any soil borings, ATC will conduct a site walk, mark the surface of the site for Underground Services Alert (USA) and clear the proposed boring locations utilizing a private utility locator. At least 48 hours is required to allow time for utility companies to identify underground lines, pipes, or cables that may be affected by the drilling activities. ATC will also notify the EHD aY Iy st 4 h urs rior to beginning any field activities. The locations of the proposed borings are within a grass planter strip between the curb and 11) the sidewalk at the former Madsen's Sunrise Dairy property, (Former Madsen Property), located at 239 South Stockton Street as illustrated on Figure 2. Advancement of Soil Borings On the day the drilling is scheduled and in advance of the performance of invasive subsurface activities, the proposed boring locations will be cleared to a depth of at least 5 / feet bgs through use of a hand auger, air-knife or other similar technologies. In this phase of the project, four vertical borings will be advanced to evaluate the lateral and vertical extent of impacted g ndwater north of MW-2 and the former underground storage tanks (USTs). These fou borings will include two depth-discreet grab groundwater samples collected in two different locations. During this mobilization, ATC will employ a CPT rig to advance a tip-mounted Hydropunch® type groundwater sampling system to collect the groundwater samples. At each location, the two-groundwater samples will be collected at .` depths o8 feet bsg and 6feet bsg. Sand units were identified at these depths in the logs of previojdsly advanced conp penetrometer testing (CPT) borings. The Hydropunch® sampling system includes an expendable drive point threaded onto a groundwater collection assembly that is threaded onto the advancing CPT direct push rods. The groundwater collection unit consists of a 60-inch long, 0.010-inch slot sized, poly vinyl chloride (PVC) or stainless steel filter screen shrouded within a protective drive tube which is sealed with O-rings to provide a watertight system that ensures sample integrity. Once the Hydropunch®type groundwater sampler has been advanced to the desired depth, the direct push rods connected to the protective shroud are retracted while the expendable drive point, which is connected to the filter screen, is held in place by the surrounding soil. The retracted shroud then exposes the filter allowing any groundwater present to infiltrate the sampling unit and travel up the hollow push rods. A disposable polyethylene bailer is then lowered 3