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12 November 2009 <br /> AGE-NC Project No. 98-0497 <br /> Page 2 of 5 <br /> 2.1. PERMITTING AND PRE-FIELD WORK TASK.S <br /> An applicable site assessment soil boring permit will be obtained from the EHD. In addition, an <br /> update to the health and safety pian presently on-fie will be prepared in accordance with <br /> Occupational and Health Guidance Manual for Hazard us Waste Site Activities(National Institute <br /> for Occupational Safety and Health Administration, U.S. Coast Guard and U.S. Environmental <br /> Protection Agency, 1985). Prior to mobilization, the proposed boring locations will be clearly <br /> marked and a utility clearance obtained through Under ound Service Alert. <br /> 2.2. SOIL-VAPOR SAMPLE COLLECTION AND NALYSIS <br /> AGE proposes to advance two soil-vapor probe borings to evaluate the potential threat for intrusion <br /> of petroleum hydrocarbon-impacted soil-vapor to indoor air. The soil-vapor borings are proposed <br /> west of the former UST area, and northwest of the former fuel dispenser area. Each soil boring will <br /> be advanced to a depth of 4 feet below sI.urface grade(bsg)for collection of a soil-vapor sample. The o <br /> soil-vapor samples will be analyzed by a CaliforniaDep ent of Public Health(CDPH)-certified t <br /> laboratory for the following constituents: <br /> Cvr G Tr-u 4- re r <br /> • Total petroleum hydrocarbons quantified as diesel(TPH-d)in accordance with EPA Method <br /> TO-17; 462._ � in <br /> -'WE- �.�.�. <br /> • Naphthalene and isopropyl alcohol in accordance with EPA Method TO-15. G���Z ►`� <br /> -� e proposed soil-vapor boring locations are illustrated. on Figure 2. Field procedures for ,,,, , <br /> advancement of borings and collection of soil-vapor samples are presented in Sections 3.1 and 3.2. � 7 <br /> Laboratory reports for soil vapor analyses,testing methods, laboratory QA/QC reports, and sample <br /> chain of custody documentation will be presented in a report with findings and recommendations. <br /> 2.3. SOIL SAMPLE COLLECTION AND ANALYSIS <br /> AGE proposes to advance one soil probe boring for the collection of soil samples, in the area north <br /> of the former fuel dispenser area, using-direct.push,tec hnology. The boring will be advanced to <br /> approximately 15 feet bsg. Soil samples will be collectc d at five-foot intervals beginning at 5`feet" <br /> bsg and extending to the total depth of the boring. The proposed soil boring location is illustrated <br /> in Figure 2.Field procedures for advancement ofborings and collection of soil samples are presented <br /> in Sections 3.1and 3.3. <br /> q a <br /> Advanced GeoEnvironmenta3,Inc. <br /> 0�� ��9 <br />