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Section No. 2.2.6 <br />Revision No. 0 <br />Date Mav 1, 1977 <br />Page 1 of 3 <br />• <br />6.0 CALCULATIONS r1ND DATA REPORTING <br />An activity matrix summarizing the quality control <br />functions for the calculations and data reporting require- <br />ments is presented in Table 6. 1. <br />6.1 Sample Air Volume <br />1. For samplers equuipped with rotameters: <br />V = 2 t <br />\Ql + Qf/ <br />where V = air volume sampled, m3 <br />Qi = initial air flow rate, m3/min at STP <br />Qf = final air flow rate, m3/min at STP <br />t = sampling period (elapsed time), min. <br />2. For samplers ecuipped with flow recorders: <br />V = Q t <br />where V = air volume sampled, m3 <br />Q = average sampling rate, m3/min at STP <br />t = sampling period (elapsed time), min <br />The average sampling rate ,. Q, is determined from the <br />recorder chart by estimation. If the flow rate does not vary <br />more than 0.11 m3/min during the sampling period, read the <br />flow rate from the chart at 2-hour intervals and take the <br />average for the value Q. <br />6.1.1 Sample Concentration <br />S.P. _ <br />(wr - wi) 106 <br />V <br />where S.P. = concentration of suspended particulate, <br />ug/m3 <br />wf = weight of exposed filter, grams <br />Wi = tare weight of filter, crams <br />• V = air volume sampled, m3 <br />Record all orig_ral calculations in the laboratory data <br />log, Figure 3. 1. <br />