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Note: This level is based on an average work day of 8 hours for 60 days of <br />surface preparation to insure the quarterly average of 1.5 microgram per <br />cubic meter over a 24 hour day is not exceeded. <br />3b. Monitoring for this level will be accomplished using high volume TSP air <br />samplers. Three (3) samplers will be used and the exact location of the test <br />sites will be determined by the Engineer. Generally, one will be placed <br />upwind, one downwind and one near the entryway of the containment <br />system. Locations of high risk such as schools will also be considered in <br />placement of TSP monitors. <br />3c. Three days of baseline monitoring will be conducted prior to abrasive <br />blasting in order to determine pre-existing conditions. <br />3d. Monitoring will be continuous for the first 5 work days of abrasive blasting. <br />If all readings are below the required emissions, frequency of monitoring <br />may be reduced by the Engineer. It is anticipated that frequency level will <br />not fall below one (1) reading per sampler per week. <br />3e. All monitors will remain in place during the entire project or until the <br />Engineer releases the Contractor from this requirement. Release from <br />monitoring must be in writing. Once all abrasive blasting is complete, <br />monitoring operations will normally cease. <br />3f. It benefits the Contractor to obtain test results in a timely manner since <br />monitoring must be done daily until continuous positive results are <br />evidenced by the Engineer. The Contractor must submit the name of the <br />testing lab to the Engineer and also the anticipated turn-around time to <br />receive test results. <br />4. Soil Quality: The Contractor will not contaminate the soil with lead. Samples <br />of the soil will be removed and tested by the Contractor for total lead content at <br />specific locations prior to project start-up and at the same locations upon <br />completion. <br />4a. The total number of soil samples will be approximately twenty (20) with <br />half being taken before and half being taken after the project is completed. <br />The exact location of the soil test sites will be determined by the Engineer. <br />4b. Laboratory analysis for total lead content of the soil will be conducted in <br />accordance with EPA Method 3050. <br />TS35-4- • 465 <br />