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1 <br /> ' ACKNOWLEDGMENT OF POTENTIAL CHEMICAL HAZARDS <br /> ' The companies identified below shall be responsible for the implementation of their own health and safety plans. <br /> Each member of the companies shall be 40-hour trained per 29 CFR 1910.120, including annual refreshers. <br /> AA&A used a general knowledge of site history or specific data from prior site investigations to identify potential <br /> ' chemical hazards,which may be present at the site. Specific chemical criteria used by AA&A and provided to the <br /> company are shown below. <br /> ' Chemical Criteria Range in Concentration <br /> TPHg 8,000 mg/kg <br /> TPHd 49 mg/kg <br /> ' Benzene 84 mg/kg <br /> Toluene 650 mg/kg <br /> Ethylbenzene 170 mg/kg <br /> ' Lead NA <br /> AA&A's health and safety monitoring and communication to the subcontractors will be limited to the following <br /> information: <br /> 4 vapor concentrations in breathing space <br /> 4 dermal protection <br /> Company Name (print) Signature Date <br /> 1 <br /> 1 <br /> ' By signing above,the subcontractors acknowledge that they have their own HSPS in effect on this project.The <br /> subcontractors' HSPS cover their own procedures,over which AA&A has no control. However,AA&A will <br /> advise subcontractors of any environmental conditions(such as vapor concentrations)which are monitored by <br /> ' AA&A. <br /> Ami Adini <br /> ' iii&%sociates,irtc, <br />