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WOLIN & SONS, INC. GENERAL ENGINEERING CONTRACTORS P. O. BOX 98 SUTTER CREEK. CALIFORNIA 95685 209 267-9111 CONTRACTOR'S LICENSE No. 236050 SITE SAFETY PLAN FOR SOIL ASSESSMENT AT O 'CONNOR WOODS RETIREMENT COMMUNITY WORK PLAN: To conduct a soil assessment at the site of two previously removed underground fuel storage tanks located at the O'Connor Woods Retirement Community, 4000 Wagner Heights Road in Stockton, California. SCOPE: A total -of two soil borings will be drilled at O'Connor Woods. The borings will be drilled in the center of the excavation sites as shown on Plate 2 . Samples will be collected from a depth of 10 feet, corresponding approximately to the bottom of the tanks , and at 15 feet. Soil borings will be advanced using a truck-mounted drill rig equipped with 8-inch hollow stem augers. During drilling, an experienced environmental geologist will classify the soil, log the boreholes and collect soil samples for laboratory analysis. Soil samples will be screened in the field using an organic vapor detector, such as a photovac TIP, with a photoionization detector (PID) or a Foxboro flame ionization detector (FID) , to provide a qualitative screening of soil and soil samples collected from the borings. The organic vapor detector measures ionizable compounds in the air in parts per million by volume (ppmv) . Field calibration is performed using a calibrated methane span gas. Ambient air is used to set the instrument zero. The soil contained in one of the three brass tubes is exposed and screened with the organic vapor detector. The vapor reading is noted as the field screening result. If no volatile organic constituents are detected during field screening, the 15-foot deep soil sample will be submitted to the analytical laboratory and the boring will be terminated. If volatile constituents are detected then the sample showing the highest reading and a sample from the depth at which volatile constituents are no longer detected will be submitted for quantitative analysis. Soil borings will be closed immediately after collecting and logging the soil samples . Closure is accomplished by grouting the boring with a cement/ bentonite slurry or as otherwise required. Drill cuttings will be placed in 55-gallon drums and left onsite for disposal by American Environmental Management Corporation. One to two soil samples from each boring will be submitted under chain-of- custody to California Analytical Laboratory/Enesco in West Sacramento. The samples will be analyzed for total petroleum hydrocarbons (TPH) extractable walk - by GC-FID; TPH purgeable; and benzene, toluene, ethyl benzene, and xylene •�� (BTEX) by EPA method 8020 . Upon completion of the field activities and receipt of the analytical results, a report of findings will be prepared for client and agency review. The report will present our observations and assessment of the analytical results.