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NOVO CCMUDW3 2.0 METHODS AND PROCEDURES 2.1 Soil Boring Locations Paul's Cleaners occupies tenant Suite F. Two of the borings (hand auger) will be located inside of this tenant space. The hand auger borings will be located on the northern end of the tenant space in the vicinity of the dry cleaning equipment. One exterior boring (Geoprobe) will be located on the north side of the tenant space. Since the presumed direction of groundwater flow is to the west, a second exterior boring (Geoprobe) will be located on the west side of the 2339 West Hammer Lane building. A Proposed Soil Boring Location Map is attached as Figure 3. 2.2 Soil Boring Installation Procedures The soil borings will be advanced by Vironex contractors using a truck mounted Geoprobe® Model 660ODT Hydraulic push probe. A Geoprobe® Macro-Core 5 sampler will be used to collect the soil samples from the borings at continuous five-feet intervals up to a depth of thirty (30) feet below grade. The Macro-Core 5 sampler consists of a 2.25-inch outside diameter, 60-inch long nickel-plated alloy-steel sampling tube that is continuously filled with soil as it is pushed and/or hammered to the desired sampling depth. The Macro- Core 5 sampler will be cleaned with alconox soap and a fresh water rinse between sampling intervals and new disposable sampling liners will be for each sampling interval. Temporary wells constructed of Teflon tubing with a stainless steel slotted well point, will be installed in the exterior borings. The groundwater will be pumped from the temporary well with a peristaltic pump. The water will be placed in a laboratory supplied sample jar. The interior soil borings will be completed by coring 4 inch holes through the concrete floor slab in the Paul's Cleaners tenant space. Then a two inch diameter steel hand auger will be used to complete the borings to a depth of five (5) feet below grade. The hand auger will be cleaned with alconox soap and a fresh water rinse between samples. 2.3 Field Screening An environmental geologist will record a physical description of the soils encountered at each boring location on a field-boring log. Visual classification of soil will be based on American Society of Testing and Materials methods 2487 and 2488, Soil Conservation Service, and American/Canadian Stratigraphic standards. The soil sample descriptions included type, color,grain size,texture, and moisture. The descriptions will be recorded on soil boring logs. In addition to recording the physical description of the soils encountered at each boring location on a field-boring log, the Nova field geologist will screen the soil samples for indications of environmental impacts. Each of the soil samples retrieved from the boreholes will be screened for organic vapors using a Phocheck PID. The PID is equipped with a 10.6 eV lamp and will be calibrated to an isobutylene standard prior to being used at the Property. The soil samples will be screened utilizing the headspace field analysis WORK PLAN PAUL'S CLEANERS AT RALEY'S STOCTON PAGE 3 NOVA PROJECT NO.B13-0472