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Limited Site Investigation Irerracon Proposed Love's Travel Stop . Lodi, California April 15, 2011 ■ Terracon Project No. 60117009 Groundwater was encountered during the advancement of the borings at depths ranging from 9 to 12 feet bgs. The groundwater flow direction and the depth to shallow groundwater, if present, would likely vary depending upon seasonal variations in rainfall and depth to the soil/bedrock interface. Without the benefit of on-site groundwater monitoring wells surveyed to a datum, groundwater flow direction beneath the site cannot be ascertained. No odors were detected in the soil samples collected from borings. PID readings for TOVs ranging up to 15 parts per million by volume (ppmv) were detected in the soil samples collected from the soil borings B-11A and B-12A. The highest PID reading was observed in the soil sample collected from a depth of 5 and 7 feet bgs in the soil boring B-11A and B-12A, respectively. The soil boring logs are included in Appendix B. Subsequent to completion of soil sampling, discrete depth groundwater samples were collected from each of the boring using a HydropunchTM sampling device. Following completion of soil and groundwater sampling activities, at the request of Mr. Harlin Knoll from the San Joaquin County, the soil borings were backfilled with Quikrete®cement mix. 2.3 Soil and Groundwater Sampling Terracon's soil sampling program involved submitting one soil sample from each soil boring for laboratory analysis. Soil samples were collected from the zone exhibiting the highest PID reading. If no elevated PID readings were detected, soil samples were collected from the capillary fringe zone, from the interval exhibiting a change in lithology, or from the bottom of the boring, based on the field professional's judgment. Soil sample intervals for each boring are presented with the soil sample analytical results (Table 1) and are provided on the lithologic boring logs included in Appendix B. One discrete-depth groundwater sample (TSP-10A, TSP-11A, and TSP-12A) was collected and analyzed from each boring using a HydropunchM sampling device. Soil and groundwater samples were collected and placed in laboratory-provided glassware and placed on ice in a cooler. The sample cooler and completed chain-of-custody form were relinquished to Acutest Laboratories, a State-of-California certified laboratory, in San Jose, California for analysis. Samples were submitted for analysis on a standard 5-day turnaround time. Reliable ■ Responsive ■ Convenient■ Innovative 4