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• 30 June 1999 AGE-NC Project No.95-0185 Page 4 of 6 3.1. PERMITTING AND PRE-FIELD WORK ACTIVITIES Applicable site assessment permits will be submitted to the PHS-EHD, additionally a City of Ripon encroachment permit will be required for the proposed soil boring installation.. A potential discharge permit may be required from the City of Ripon for the pilot study. As required by PHS-EHD permitting, 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 drilling activities,each proposed drilling location will be clearly marked and an utility clearance obtained through Underground Service Alert. 3.2. SOIL PROBE BORING INSTALLATION AGE proposes to install four soil probe borings to better delineate petroleum-hydrocarbon impact to ground water. The soil probe borings procedures were approved in the Preliminary Soil and Ground Water Investigation, dated 14 November 1995. The proposed locations are illustrated in Figure 2. The proposed soil boring will be advanced below ground water until no hydrocarbon impacted soil is observed (if applicable). Additionally, a grab ground water sample will be collected from each probe boring. Selected soil and each samples will be analyzed by a State of California Department of Health Services (DHS)-certified laboratory for the following constituents: • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) in accordance with EPA Method 8015 Modified/5030; • Volatile aromatics (benzene, toluene, ethyl benzene and xylenes: BTEX) and methyl tert- butyl ether (MTBE) in accordance with EPA Method 8020; and • Fuel oxygenates including MTBE, tertiary-butyl alcohol (TBA), di-isopropyl ether (DIPE), ethyl tertiary-butyl ether(ETBE) and tertiary-amyl methyl ether (TAME) by EPA Method 8260 Modified. Laboratory reports for soil analysis, testing methods, laboratory quality-assurance/quality control (QA/QC) reports, and sample chain of custody documentation will be presented in a report with findings and recommendations. • , Selected soil and water, samples will be analyzed by a microbiological laboratory for microbial Advanced GeoEnvironmentai,Inc.