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77. Al 10 December 2002 .. F _ AGE-NC-Pro'ect No. 02=0961- Page 3 of 5 3.1. .PERMITTING AND.PRE-FIELD WORK ACTIVITIES . A site assessment boring permit will be-obtained from the EHD'for all on-site and off-site boring locations and encroachmentpermits- will be obtained from the.City -of Ripon Public' -Work Department.-In addition,a health and safety plan will be prepared in accordance with Occupational Safety and Health Guidance Manual for:Hazardous'`Waste.Site-Activities (National,Institute .for _ Occupational Safety and, Health`Administration,.U.S. Coast Guard and U.S. -Environmental Protection Agency, 1985). Prior to mobilization,the area of excavation will be clearly marked and a utility clearance-obtained through Underground Service Alert.- 3.2. lert.3.2. SOIL AND GROUNDWATER.SAMPLE COLLECTION AND ANALYSIS .AGE proposes to advance -five'soil probe borings using direct push technology to assess for petroleum hydrocarbon- and/or MTBE.-impacted soil and/or ground water beneath the site. :The proposed boring locations include: 1)three borings at.a distance of between 10 to 15 feet north,west and south of the westemmostdispenserisland; 2) one boring-approximately-30 feet north of the central'di sp en' ser island;and 3)one boring immediately north of the diesel UST.The'proposedprobe boringlocations-are illustrated in Figure 2-,the proposed probe boring locationsmaybe modified due to field observations. The five probe borings will be advanced to approximately 30 feet bsg;however, the total boring depth,to a maximum of 50 feet bsg;will be determined.by the-extent of any contamination detected -. by field observations. As each boring is advanced, soil samples will be collected at 5400t intervals f beginning at 5 feet bsg and extending to,the total probe bbririg depths.Grab groundwater samples will be taken at first water in all five borings.Field procedures for advancement ofprobe borings and Y. collection of soil and groundwater samples are presented.in Sections.4.T through 4.3.. _- Ground r' ater and selected soil same_les from each probe boring will be submitted for laboratory analysis. The selected samples will be.analyzed by a State_of California Department.of Health Services (DHS)-certified laboratory for..the following constituents:. _- •. Totalpetroleum hydrocarbons as gasoline' (TPH-g} and total petroleum hydrocarbons as = '- diesel (TPH-d),in accordance with EPA Method 8015 Modified; Y •=Benzene,toluene,ethylbenzene-andtotalxylenes(BTEX)and the oxygenated fuel additives methyl-tert-butyl ether (MTBE),,tertiary butyl alcohol (TBA);-di-isopropyl ether (DIPE), - , ethyl tertiarybutyl ether(ETBE);and tertiaryamyl methyl ether.(TAME)in-accordance with EPA Method 8260 Modified. Advanced Geo Environmental,Inc. , -- - - --- - - - - r.. - - -