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.y a <br /> I / . <br /> Snegii'igajionIc i 2Z,? <br /> VOCs recovered from the contaminated soil car.be calculated using the airflow <br /> volumes and 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 /> 8.0 Qean-.up Slandard <br /> 81 The clean-np standard would be established by San Joaquin County, Division of <br /> Environmental Health. <br /> 9.0 Qnfirmation/Post Treatment Sampling <br /> 9.1 When off-gas levels show that air IeveIs have been reduced to asymptotic levels, <br /> surge testing would be conducted to indicate whether a concentrated source of <br /> VOC remains 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 passible <br /> presence of TPIg. These locations would be as close as practical to the injection <br /> and extraction wells (from which pre-treatment samples were taken during <br /> installation). Soil samples would be collected at depths corresponding to pre- <br /> treatment sample depths. <br /> _ <br /> The sampling protocol,sampling plan,and analytical plan would be in accordance <br /> with the methods described in RWQCB guidelines,and be the same as for other <br /> soil sampling operations conducted throughout the project. Samples would be <br /> analyzed in BSICs State-certified Analytical Laboratories, in Fresno, California. <br /> 10.0 Health and Safely flan <br /> 10.1 This Health and Safety plan has been prepared to address health ar..d 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 /> I£benzene is present above its Threshold Limit Value(TLV), the plan would be <br /> reviewed and upgraded as appropriate by an industrial hygienist (CIH)certified <br /> in general practice by the American Board of Industrial Hygiene. <br /> i <br /> 10.3 The requirements of this Health and Safety Plan may change as work progres3es <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 />