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Ms. Cazla Lenkey, CDHPE <br />July 27, 1998 -page 2 <br />question was collected at 3:45 p.m.. This information demonstrates that the discharge was <br />sampled within 48 hours after measurable precipitation had stopped. Discharge occurred <br />solely in response to precipitation and as a result, the alternative limitations are applicable. <br />At outfall 011, the primary 30-day average limitation for TSS was also exceeded by a sample <br />collected 5/6/98 (46 mg/I). However, the alternate daily maximum limitation for settleable <br />solids applicable in the event of discharge caused by precipitation less than or equal to the 10- <br />year, 24-hour precipitation event, was met. Again, as noted on the enclosed monthly NOAA <br />weather summary for May, precipitation in the amount of 0.03" was rewrded on 5/6/98. <br />Daily precipitation measurements are typically recorded at 7:30 a.m.. The sample in question <br />was collected at 2:20 p.m.. This information demonstrates that the discharge was sampled <br />within 48 hours after measurable precipitation had stopped. Discharge occurred solely in <br />response to precipitation and as a result, the alternative limitations are applicable. Again, <br />please note that values reported on the enclosed DMR's represent the maximum (or minimum <br />as applicable) monthly values generated at each outfall during the quarter. A daily maximum <br />value for TSS of 54 mg/1 is reported for outfal1011 on the enclosed DMR form, however, this <br />value was from a sample collected in June. Additional samples collected in June resulted in a <br />monthly average value below the primary limitation <br />Lastly, at outfall 017, the primary 30-day average and daily maximum limitations for TSS and <br />the primary 30-day average limitation for total iron were exceeded by a sample collected <br />4/1/98. However, the alternate daily maximum limitation for settleable solids applicable in the <br />event of discharge caused by precipitation less than or equal to the 10-year, 24-hour <br />precipitation event, was met. Measurable precipitation was recorded on March 30 and 31 (see <br />prior DMR submittal) and snowmelt was actively underway at the time the sample was <br />collected. Discharge occurred solely in respotse to precipitation and snowmelt and as a result, <br />the alternative limitations are applicable. <br />No other exceedances or variances from compliance with the primary effluent limitations <br />occurred during the quarter. Thank you for your cooperation in this matter. Please contact <br />me should you have any questions regarding the enclosed information. <br />Sincerely, <br /> <br />Karl C. Koehler <br />Senior Environmental Engineer <br />t<cxrtrt tco~9n-><t[x7t <br />eoclme <br />c U.S. Bmlm~aN P1aKUl0u 11/mry <br />7. EWmb~c4 CD]d0 <br />Pik 109.3.7 <br />