ࡱ> 685#` A&bjbj\.\. 20>D>DA(((((((< < h( ((    6( (    4(( 0՚  (vL0T,X( Vb V    <<< <<< <<<(((((( California Regional Water Quality Control Board North Coast Region Interoffice Communication DATE: April 10, 2006 TO: John Short SUBJECT: Inspection of City of Ukiah Wastewater Treatment Facility (WDID No. 1B84029OMEN), Construction Stormwater (WDID No. 1 23C339616), and Industrial Stormwater (WDID 1 23I020002) On April 6, 2006, I inspected the subject facility accompanied by Andrew Luke (Wastewater Treatment Plant operator), Bill Pounders (Interim Wastewater Treatment Plant Supervisor) and Tim Banyai (Brown and Caldwell the Citys consulting engineer for the WWTF upgrade project). At the beginning of my inspection, we were joined by representatives of the Citys construction management firm, Harris and Associates (Jerry and Buzz) and construction contractors, Kiewit Pacific Company (Howard) to review the construction stormwater BMPs that have been installed. I inspected the wastewater treatment plant for compliance with Waste Discharge Requirements Order No. 99-65, as well as the handling of industrial stormwater and construction stormwater. Construction Stormwater The wastewater treatment plant will be upgraded to replace aging facilities and increase the capacity to 3.01 mgd. Harris and Associates (based in Novato, CA) has been hired as the construction managers. The main contact person at Harris and Associates is Michelle Leonard, P.E. (office: 415-878-0195; cell: 707-484-5123). Kiewit Pacific Company has been hired as the construction contractor. Construction was originally planned for June 2005, but it was postponed due to the fact that the lowest bid came in higher than the City originally anticipated. The City rescheduled construction to begin in March 2006, weather permitting. The contractor (Kiewit) submitted an NOI and prepared a SWPPP, which was available on-site. Due to the on-going wet-weather, construction has not started, but the contractor has been preparing for the start of construction by installing stormwater controls. No grading will take place during wet-weather. Construction will be occurring in flat areas of the WWTF. The contractor has set up wattles between construction areas and drainage ditches and is installing silt fences along the property boundary. Drain inlet socks have been installed in all drop inlets located on the WWTF site, including the entrance to the WWTF and inlets that arent located in the identified construction areas. We talked about the need to maintain these with daily inspections and routine cleaning during the rainy season so that they can remain effective. All unpaved roads through the WWTF are being rocked to minimize tracking of loose soil. The silt fences have been properly secured. I requested that straw wattles be properly staked. I also observed a straw wattle that was being damaged by rodents and requested that the wattles be replaced if they are rendered ineffective by rodent damage. Industrial Stormwater Storm water from the area northeast of the treatment process area is captured in a basin, then pumped to a drainage swale that runs from north to south through the treatment plant property. Storm water from areas around the treatment process is routed to the sludge drying bed (located east of the treatment process area) and returned to the treatment process. Storm water from the remaining areas of the WWTF is routed to one of two retention basins before it is pumped to one of two on-site drainage ditches. Both drainage ditches discharge to another drainage channel that runs from west to east along the south side of the WWTF and subsequently to the Russian River. All of the drainage ditches had flowing water at the time of the inspection. I observed two of the three stormwater retention basins and discharge points. No problems were observed. Wastewater Treatment Plant Headworks. The headworks is located in an indoor basement. When I inspected this area in October, 2005, I saw that everything is enclosed and there is little to see. The headworks will be replaced with a new headworks facility located outside. Treatment. We walked through the treatment process. All process units were in operation, including the advanced wastewater treatment facility. I observed a noticeable musty odor at the primary sedimentation basins. I did not observe any facility violations. The facility was producing both disinfected secondary and disinfected, dechlorinated AWT effluent during the time of my inspection. I learned that the facility does not monitor chlorine residual at the end of the secondary chlorinator pipeline (nor is it required by the permit). Coliform is monitored year-round on a weekly basis, prior to discharge to the percolation ponds. The effluent from the AWT facility was very clear. Continuous turbidity monitoring is recorded after the AWT filters, however, the operators take a daily grab sample at the Discharge Point 001 manhole (post-AWT chlorination and post dechlorination) to analyze for reporting on the self-monitoring report. Continuous chlorine residual monitoring is also conducted at the same manhole for the purpose of demonstrating that no chlorine is present in the effluent discharged to the Russian River. Once an hour a control valve switches over and analyzes the effluent leaving the chlorine contact tank. Disposal. During my inspection, disinfected secondary effluent was being discharged to the percolation ponds and disinfected, dechlorinated AWT effluent was being discharged to the Russian River. I inspected the discharge outfall and observed that the effluent discharged was very clear. There is a small inlet in the river bank at the outfall location where the effluent appeared to be mixing with the Russian River water. I observed foam collected in this inlet area that appears to be a result of the discharge. I could not see a distinct plume (no color differential), but I could see bubbles/light foam on the surface of the river water as it moved away from the inlet area. I estimated that 50 feet downstream of the outfall pipe, the effluent had spread about 15 feet away from the river bank. The width of the river is about 50 feet. We talked about receiving water monitoring. The receiving water monitoring stations vary from year to year and depends on where an operator can get to the river to get a sample of flowing water. They have been sampling approximately 200 feet upstream of the discharge point and about 50 feet downstream this year. In past years, the distance upstream or downstream has varied between 50 and 200 feet. Sludge Handling. The facility has two anaerobic digesters that are used to process the sludge. Sludge from the digesters is directed to a sludge press and then hauled off to Redwood Landfill in Novato for disposal and occasional use as cover material. The sludge processing facilities are operated 2 to 3 days per week. They were not operating at the time of my inspection. Laboratory. The Ukiah WWTF lab is ELAP-certified for BOD, TSS, settleable solids, total residual chlorine, total coliform, pH and dissolved oxygen. I did not perform a complete inspection of the laboratory during this inspection, but observed that it is clean and orderly and no equipment looked to be in poor repair. I observed Andrew Luke calibrate the pH meter and inspected two pages of his laboratory logbook. Meters are calibrated weekly. When TetraTech staff inspected the facility in January 2005, the inspectors observed that the facility needs to record the initials of the person collecting and analyzing samples, time of sample collection and time of analyses to document that samples are analyzed within analytical holding times. These changes have been made. ^!!1#<#A& hE j>*h7hE j hE j50CD^_tu= > p q , - E F hi ^`$a$A& ! !!0#1#<&=&>&?&@&A&0&P1h/ =!"#$% @@@ NormalCJ_HaJmH sH tH :@: Heading 1$@&5\DAD Default Paragraph FontVi@V  Table Normal :V 44 la (k@(No List DC@D Body Text Indent ^A00CD^_tu=>pq,-EFh i   !01<=>?@C00000000000000000000h0h0h0h0h0h0h0h0h0h0h0h0h0000000000000A&A&A&)!  dw<_\El- \, #̾ |1TV<|!!|,< 006TT\eemzzC      5;;  [aalrrC   8*urn:schemas-microsoft-com:office:smarttagsCity=*urn:schemas-microsoft-com:office:smarttags PlaceType=*urn:schemas-microsoft-com:office:smarttags PlaceName9*urn:schemas-microsoft-com:office:smarttagsState9*urn:schemas-microsoft-com:office:smarttagsplace p4)FPQU *:Dt ~  ?L^lLYq{C  m1<C333333333Uy+o|  @CCz~`woh^`.h^`.hpLp^p`L.h@ @ ^@ `.h^`.hL^`L.h^`.h^`.hPLP^P`L.z~`w         7E j@A@@UnknownGz Times New Roman5Symbol3& z Arial"qhR& 66!24d22 2aHX)?72/California Regional Water Quality Control BoardCathleen Goodwin Cathy Goodwin Oh+'0 , DP p |  0California Regional Water Quality Control BoardCathleen Goodwin Normal.dotCathy Goodwin6Microsoft Office Word@%@ @BV\@Ț ՜.+,D՜.+,` hp  SWRCB62 0California Regional Water Quality Control Board TitleL@ @_AdHocReviewCycleID_EmailSubject _AuthorEmail_AuthorEmailDisplayName_ReviewingToolsShownOnceB Cloverdale Violations Summarygoodwins@sonic.netDavid and Cathy Goodwin  !"#$&'()*+,./012347Root Entry F՚ 91TableWordDocument20SummaryInformation(%DocumentSummaryInformation8-CompObjq  FMicrosoft Office Word Document MSWordDocWord.Document.89q