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tW _10MIN <br /> E' <br /> �. <br /> w, <br /> K- <br />' 3 <br /> Uec4ficatio,n R9 5-01 <br /> VOCs recovered from the contaminated soil can be calculated using the airflow <br /> volumes apd VOC concentrations of the process airstreams during operation. If <br /> a catalytic oxidizer is utilized, it would be a skid mounted unit to be located on <br /> the roof of the AP building,pending regulatory agency approval. <br /> 8.0Clean-up <br /> 8.1 The clean-up standard would be established by San Joaquin County,Division of <br /> EN I Environmental Health. <br /> 9.0 fi ion/Post Treat ent 5ampling <br /> 9.1 When off-gas levels show that air levels have been reduced to asymptotic levels, <br /> surge testing would be conducted to indicate whether a concentrated source of <br /> VOC retrains in the subsurface. If soil vapor concentrations do not rise to a <br /> substantially higher level than the asymptotic concentration, post-treatment soil <br /> borings would be taken at predetermined locations and analyzed for the possible <br /> presence of TPHB. These locations would be as close as practical to the in&wtion <br /> and extraction wells (front which pre-treatment samples were taken during <br /> installation). Soil samples would be collected at depths corresponding to pre- <br /> treatment sample depths. <br /> The sampling protocol,sampling pian,and analytical plan would be in accordance <br /> with the methods described in RWQCB guidelines, and be the satne as for other <br /> soil sampling operations conducted throughout the project. Samples would be <br /> eM analyzed in BSICs State-certified Analytical Laboratories, in Fresno, California. <br /> i <br /> 10.0 Heallh and Safety Pan <br /> 10.1 This Health and Safety plan has been prepared to address health and safety <br /> requirements during field operations, such as drilling and well installation when <br /> workers could be exposed to volatile organic vapors (VOCs). <br /> 10.2 The working environment would be sampled with a detector tube for benzene <br /> whenever petroleum fuel odor is observed,or a change in odor level is observed. <br /> If benzene is present above its Threshold Limit Value('TLV),the plan would be <br /> reviewed and upgraded as appropriate by an industrial hygienist(CIH) ce.tified <br /> in general practice by the American Board of industrial Hygiene. <br /> - 10.3 The requirements of this Health and Safety Plan may change as work progresses <br /> due to changing work conditions, but no changes would be made without the <br /> approval of the Engineer. <br /> B-8 REMEDIATION <br /> SERVICES. INC. <br />