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0 P; I s 0 <br /> ECA cRECENED <br /> is <br /> ante ®a <br /> DEC - 5 2003 <br /> CITY OF� a .,.f. . <br /> PUBLIC W PT. <br /> ���`°® �«' ►�'`�'�` WASTEWATER QUALITY CONTROL FACILITY <br /> DATE: DECEMBER 2, 2003 <br /> TO: MICHAEL KUMMER <br /> ENVIRONMENTAL SCIENTIST <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD- <br /> CENTRAL VALLEY REGION <br /> FROM: WARREN SHANNON <br /> WASTEWATER SYSTE SUPERINTENDENT <br /> SUBJECT: FINAL REPORT SUMMARIZING RESULTS OF FECAL COLIFORM TESTING <br /> During the City's recent start-up of nitrification facilities and subsequent application of effluent to land, the <br /> South San Joaquin Irrigation District Drain was sampled in three locations (see attached map) for fecal <br /> coliform. The fecal coliform analysis was conducted to assess the impact of levee failures that allowed <br /> undisinfected effluent(irrigation water)to flow into the drain ditch. The following table contains the results <br /> of all of the fecal coliform analyses conducted during the start-up period. All results are Fecal Coliform <br /> MPN per 100 m1s. <br /> Airport Way (upstream) Yosemite Avenue Louise Avenue <br /> DATE immediate) downstream 1 mile downstream <br /> Sample#1 Sample#2 . Sample#1 Sample#2 Sample#1 Sample#2 <br /> 10/16/03 90 1600 50 <br /> 10/28/03 300 500 80 30 80 80 <br /> 11/4/03 >1600 >1600 >1600 >1600 >1600 >1600 <br /> 11/7/03 >1600 >1600 >1600 <br /> 11/12/03 240 240 900 <br /> Based on the presence of significant levels of fecal coliform upstream of the City's facilities, it does not <br /> appear that the levee failures significantly impacted the ditch. The discharge of effluent to the irrigation <br /> fields was stopped on November 11, 2003 and the last fecal coliform samples were collected on <br /> November 12, 2003. The ditch currently has no flow from any source (ag or storm), and thus further <br /> testing would not be valid. In the absence of the possibility or need for further testing, the City will <br /> consider this case closed. <br /> Thank you. <br /> c: Phil Govea <br /> Senior Engineer <br /> Mike Gilton <br /> South San Joaquin Irrigation District <br /> Donna Heran <br /> San Joaquin County Environmental Health <br /> 1001 W. CENTER ST. • MANTECA, CA 95337 • (209) 239-8433 FAX (209) 825-2359 <br /> Nnwd w > <br />