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• r NOW Pre-field Preparation A review of Southern Pacific Railroad(SPRR)records and on-site reconnaissance will be performed. An effort was made to secure the SPRR record index map for the site and adjacent sites for information. The Rail Commission helped to obtain right-of-way entry from UPRR for the purposes of conducting the Phase II Hazardous Materials Assessment on UPRR property, and the Right-of-Entry Permit required that all drilling locations be hand augured to a depth of eight feet(or refusal on hardpan) before any subsurface exploration takes place. A site safety plan was prepared for the field work and drilling. All boring locations were screened by Underground Service Alert and locally with the use of metallic pipeline locating devices. Drilling and Sampling Methods Boreholes were advanced at the locations shown on Figures I and 2. The boreholes were located as close as possible to the original drilling target, and the sampling performed at that point. Soil samples were collected at five-foot intervals and drilled under approved permits of the PHS/EHD. The soil samples and cuttings were field screened for hydrocarbons using a Hanby Field Colormetric Test which yields a qualitative concentration of the sample screened. Soil samples selected for quantitative analysis were submitted under appropriate chain-of-custody control to a State-certified laboratory to perform the requested analysis. Those samples were selected based upon field observations, qualitative field screening results, and the depth of the boring. Borings were advanced with hand auger and machine powered hollowstem auger drilling equipment. The equipment was cleaned prior to arriving on-site, between each borehole and prior to leaving the site. The boreholes were logged by a registered geologist using the Unified Soil Classification System and taking geologic observations as needed. The field presence for potential contaminants was evaluated using Hanby Field Analytical Laboratory for a qualitative estimate of petroleum hydrocarbons, together with color stains and odor. The soil samples were 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 was retrieved, and sealed with Teflon tape, 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. In addition individual soil samples Parcels 5 and 6 were collected from near surface soils to perform a Resistivity "R"-value determination. Cuttings from the borings and rinse water were drummed and labeled for storage on the site until their content is known and the soil can be properly handled. All soil borings will be grouted from the bottom to top of the borehole with cement grout following the requirements of the PHS/EHD. Page 2