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will be placed in the borehole and hydrated with potable water to create a slurry to provide a seal around the sampling tube. Atlas will collect a sub-slab vapor samples from each of the seven sub-slab soil vapor points. The sub-slab vapor points will be removed and the concrete will be patched after the sub-slab vapor sample has been collected. The sub-slab vapor samples will be submitted to a California State-certified analytical laboratory for analyses on a standard turn-around-time for analysis in accordance with the summary provided below. Upon completion of sampling, each probe will be removed and all borings will be filled to near grade with neat cement grout under the supervision of a representative from SJCEHD. The borings will be patched with the appropriate materials to match the surface (including asphalt or concrete patch where needed). Please refer to the attached Site Map for a layout of the proposed soil boring and subslab vapor point locations. Task 3—Analytical Testing Soil and groundwater samples will be preserved on ice and all samples will be submitted under chain-of- custody procedures to a California State-certified analytical laboratory for analysis. Soil and groundwater samples will be analyzed for TPHg, TPH as diesel (TPHd), and TPH as motor oil (TPHmo) by EPA 8015M; and volatile organic compounds by EPA Method 8260B. Vapor samples will be submitted under chain-of-custody procedures to a California State-certified analytical laboratory for analysis. Each vapor sample will be analyzed for volatile organic compounds and TPHg via EPA Method TO-15. The laboratory analysis will be completed on a standard two-week turnaround time. Expedited results can be requested for an additional fee depending on laboratory availability. Task 4—Reporting Following completion of fieldwork,Atlas will prepare a report that will include a description of field activities, boring logs, laboratory derived analytical data presented in tabular form, maps indicating the location of all samples, a comparison of analytical results to Environmental Screening Levels, and conclusions. The work described in this proposal will be performed under the direction of a California Registered Professional Engineer or California Registered Geologist. SCHEDULE Atlas will schedule field activities for this project as soon as possible upon receipt of authorization to proceed, depending on regulatory agency and subcontractor schedules. A report will be prepared and submitted to the Client approximately 30 days or less following completion of field activities. ASSUMPTIONS/LIMITATIONS This proposal has the following assumptions/limitations: • Adequate access will be provided to allow for the unimpeded contracted scope of work. • Subcontractors will have availability within the proposed timeframe;