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Scope of Work Additionally, the workplan will be submitted to the Rail Commission and UPRR for review and approval before any exploration work proceeds. The following workplan should meet the requirements of the San Joaquin Public Health Services Department Environmental health Division (PHS/EHD). The scope of work to be performed at the site includes the listed items: Pre-field work Preparations A review of Southern Pacific Railroad (SPRR) records and on-site reconnaissance will be performed. An effort will be made to secure the SPRR record index map for the site and adjacent sites. The Rail Commission will obtain right-of-way entry from UPRR for the purposes of conducting the Phase II Hazardous Materials Assessment on UPRR property. As indicated previously, the Right-of-Entry Permit will require that all drilling locations be hand augured to a depth of eight feet (or refusal) before any subsurface exploration takes place. A site safety plan will be prepared for the field work. Additionally,before drilling all boring locations are to be screened by Underground Service Alert and the use of metallic pipeline locating devices. Drilling and Sampling Methods Wright will drill and sample the soils at the locations listed in the table below, and on Figure 1. The Right-of Entry Permit requires that all boring locations be hand augured to a depth of 8 feet below grade (or refusal)before drilling to identify buried pipeline structures, etc. Soil samples will be collected at five-foot intervals and drilled under approved permits of the PHS/EHD. The soil samples and cuttings will be field screened for hydrocarbons using a photoionization detector (PID) or similar devices. Each of the soil samples selected for quantitative analysis will be submitted under the appropriate chain-of-custody control to a State-certified laboratory to perform the requested analysis. The samples will be selected based upon field observations, qualitative field screening results, and the depth of the boring. Borings will be advanced with hand auger and machine powered direct push drilling/sampling equipment. The equipment will be cleaned prior to arriving on- site,between each borehole and prior to leaving the site. The boreholes will be logged by a registered geologist using the Unified Soil Classification System and taking geologic observations as needed. The field presence for potential contaminates will be evaluated using soil vapor screening with a photoionization meter, as well as noting color stains and odor. The soil samples will be collected by driving a clean brass liner into the undisturbed soil ahead of the auger bit, driving the sampler to completely fill the liner. The liner will be retrieved, and sealed with Teflon tape or foil, sealed with plastic endcaps, logged onto a chain of custody form and placed in an ice chest on crushed ice for transport to the laboratory. The boring to be placed through the center of the excavation for the former UST at the southeast corner of the Railway Express Office (963 East Weber Avenue) may- be extended if hydrocarbon-affected soil is encountered. In that case, the boring would be extended until contamination is not encountered or until groundwater is Page 2