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or oration P May 25, 2000 A Member of The IT Group Ms. Carol Oz Page 2 canopy footings and asphalt surfacing. Maximum excavation depth was 10 feet bgs due to the close proximity to groundwater. Results of soil sampling and excavation were reported in IT's Product Line Upgrade and Soil Excavation Report dated March 15, 2000. PROPOSED SCOPE OF WORK As described above the proposed work is intended to define lateral and vertical extent of petroleum impacted soil and groundwater as requested in the letter prepared by SJCPHS/EHD dated April 24, 2000. All work will be done in accordance with stipulations of permits obtained from the SJCPHS/EHD. Field and laboratory procedures are included as Attachment A. Site-Specific Health and Safety Plan As required by the Occupational Health and Safety Administration (OSHA) "Hazardous Waste Operations and Emergency Response" guidelines (29 CFR 1910.120), and by California Occupational Health and Safety Administration (Cal-OSHA) "Hazardous Waste Operations and Emergency Response" guidelines (CCR Title 8, Section 5192), IT has prepared a Site-Specific Health and Safety Plan (Attachment B). The Site-Specific Health and Safety Plan will be reviewed by the field staff and contractors prior to beginning field operations at the site. Geoprobe®Borings A maximum of five Geoprobe® borings (GP-1 through GP-5) will be driven using a direct push rig in the general locations shown on Figure 2. The borings will be advanced to groundwater at which time a discrete water sample will be collected. Based on information from the neighboring sites local groundwater is approximately 15 feet bgs. Following groundwater sample collection the borings will be continued to an approximate depth of 30 feet bgs. Monitoring Well Installation Three groundwater monitoring wells (MW-1 through MW-3) will be installed at locations based on Geo robe® results. The proposed wells will be installed 15 feet below the current p p p water level and will be screened from 5 feet above. The total depth of each well will be approximately 30 feet bgs. Potential well locations are shown on Figure 3. Soil Selection and Analysis Soil samples will be collected every five vertical feet until two consecutive "clean" soil samples are collected. Determination of "clean" will be based on field evidence including organic vapor concentrations, odor, and staining. A maximum of three soil samples per boring will be submitted to Sequoia Analytical a California State-certified laboratory and analyzed for the presence of total petroleum hydrocarbons quantified as gasoline (TPH-g), benzene, toluene, ethylbenzene, and total xylenes (BTEX), and methyl tertiary-butyl ether \\SACRFP 1\COMMON\rancfp 1\Proj ects\Projects\880\040\1 a\0102\880040_wp.doc