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12 June 2003 AGE-NC Project No. 03-1038 Page 4 of 5 3.3. GRAB GROUND WATER SAMPLE COLLECTION AND ANALYSIS Grab ground water samples will be collected from each boring during the boring process using a Geoprobe water sampling assembly. Samples will be collected into 40-m1 volatile organic analysis (VOA) vials with 0.5 ml 18%hydrochloric acid as a sample preservative and 1-liter amber bottles as appropriate for the required analyses; ground water sample collection procedures are presented in Section 4.1. Ground water samples will be analyzed by a DHS-certified laboratory for: • TPH-g by EPA Method 8015 Modified; and • VOCs by EPA Method 8260. 3.4. REPORT PREPARATION Upon completion of field work and receipt of final laboratory analysis, a report will be prepared presenting the findings of the investigation. The report will include a description of the work performed and results of the sampling and analysis. Conclusions, applicable recommendations,and maps will be included in the report. 4.0. FIELD PROCEDURES All field procedures will be overseen by an AGE representative under the supervision of a California Registered Geologist.Procedures for the advancement of soil probe borings, soil sampling,ground water sampling, equipment decontamination and sample shipment are outlined below. 4.1. PROBE BORING ADVANCEMENT Probe borings will be advanced using a van-mounted.Geoprobe 5400 direct-push probing unit equipped with 1.25-inch probing rods.The Geoprobe advances soil probe borings using a hydraulic or pneumatic hammer to drive soil and ground water sampling tools to specified depths. 4.1.1. Soil Sampling Procedures Soil borings will be sampled at discreet five-foot intervals using a 1.5" Geoprobe soil sampling assembly loaded with four six-inch brass sleeves. Upon sample retrieval,the ends of the second or Advanced GeoEnvironmental,Inc.