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e � <br /> t7ITY OF TRACY <br /> P. O. UpE 1(129 • TNACICAIJ FOR NIA 953]6 -� Ares Code 209: 835-2211 t- - <br /> April 12 , 1979 <br /> Regional Water Quality <br /> Control Board <br /> Central Valley Region <br /> 3251 "S" Street <br /> Sacramento, CA. 95816 <br /> Sirs: <br /> I am enclosing our self monitoring reports and a summary of <br /> operations data for March 1979 . <br /> Effluent flow meter data was not accurate during March; therefore, <br /> numbers reported are calculated flows based on the combined in- <br /> fluent flows minus wasted flows. One BOD value and one suspended <br /> solids value were not reported because they were invalid due to <br /> laboratory and sampling errors. Our new effluent BOD and Suspended <br /> Solids 30-day average of 35 mgg�l became effective for March. We <br /> exceeded our effluent minimuehlimit three times and our turbidity <br /> increase limit between the two receiving stream sample points twice. <br /> Out of a total of 105 grab samples of our final effluent taken for <br /> chlorine residual analysis , we exceeded our daily limit only 17 <br /> times, <br /> As can be determined from the data, we accomplished 96. 9% BOD <br /> removal and 97. 0% Suspended Solids removal through our treatment <br /> plant in March 1979, <br /> Please let us know if you require anything further. <br /> Sincerely yours , <br /> WASTEWATER TREATMENT PLANT <br /> DARRELL D. SCOTT <br /> Lab. Technician II <br /> DDS: mg <br /> cc: Michael Locke <br /> San Joaquin Local Health District <br /> Enclosures <br />