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Home My WebLink AboutCOM 0428.001 1998-2000 40V,~fY Os hew 9~ DOMINIC YAGONG ~l,le Phone: (808) 961-8264 Councilmrmber ~ FAX: (808) 969-3291 .L~ ~~F OF~XI!~ COUNTY COUNCIL County of Haeuaii ea Hawaii County Building Co 25AupuniStr~et On c Hilo, Hawaii 96720 C ~7 c~ W iTl O C r~7 ~ August 30, 1999 ~ _ N O TO: Chairman James Arakaki and Members Hawaii County Council FROM: Dominic Yagong, Chairman ~1~ Public Works & Parks Committee RE: Comm. 365.001 At the Public Works & Parks Committee meeting held on July 27, 1999, Comm. 365.001, a copy of which is attached, was deferred because it was erroneously given a "point number" to Comm. 365, regarding the State Health Department's reports for the East and West Hawaii County Sewer System Maintenance Inspections. We have recently received a copy of Thomas Arizumi's letter to Deputy Chief Engineer Jiro Sumada, dated May 19, 1999, which is the correct report which Comm. 365.001 addresses. Therefore, Mr. Arizumi's May 19, 1999 letter has been numbered Comm. 428 and this memo with the attached previously numbered Comm. 365.001 will be numbered Comm. 428.001. Thank you for your attention to this matter. Att. ~/,ZS'. ool Comm. No. F51e No. .SEW Ref. To: P G Ref. Date ~ 3 1 1999 J+,v,w y~ ~ Stephen K. Yamashiro - Mayor Jiro A Sumach ~~ir~ O1~H~+~~ Dep~fy Chief Engnien ~II1Int~J IIf ~ttht~it DEPARTMENT OF PUBLIC WORKS ~ ~ 25 Aupuni Suect, Room 202 • Hilo, Hawaii 96720-4252 C ~ ~ rl (808)961-8321 • Fu (808)961-8630 ~ J - 1, July 14, 1999 _ 3 . . Thomas. E. Arizumi, P.E. G-' Chief, Environmental Management Division _ N State Department of Health P.O. Box 3378 Honolulu, Hawaii 96801 Subject: Hilo Wastewater Treatment Facility Operation and Maintenance InspeMion - EMD/WB 971337 Corrective Action Plan The County of Hawaii Wastewater Division has received the annual operation and maintenance inspection report dated 5/19/99 and provides the following corrective action plan to address the deficiencies cited in the report. 1. Maintenance: Preventive Maintenance: Backlogged Corrective Maintenance: Unsatisfactory The County is committed to an aggressive combination of filling staff vacancies and contracting out various repairs in order to improve the existing condition and the future maintenance of the Hilo Wastewater Treatment Plant. Major items requiring repair/replacement: a. Influent Screen No. 2 - Geaz reducer problem -Gear reducer has been replaced and Barscreen is operational. Completed b. Primary Clarifier No. 1 -Malfunctioning VFD -Wastewater Division evaluating removal of VFD and replacement with gear reduction system. Tareet Completion 12/30/99 c. Grit Screw -Rebuild screw and replace housing -Estimates from Contractors indicate repair cost of approximately $25,000 each. Wastewater Division is evaluating replacement of the Grit Classifiers with new classifiers due to the high repair costs. Tareet Completion for replacement of classifiers is 6/30/%/0,0. Comm. No. ?~OrJ.t7~l File No. SEW Ref. To: ~pG Ref. Date tAll- 1 5 1999 Letter to Thomas E. Arizumi Page 2 of 4 July 14, 1999 d. Aeration Tank Diffusers -Needs replacement -Diffusers for Solids Contact Tank have been replaced. Completed e. Centrifuge No. 1 -Tiles are falling off. -The Wastewater Division has had several discussions with the manufacturer regarding repair of the unit. Humbolt-Decanter has acknowledged that loss of tiles would result in accelerated deterioration of the screw conveyor but that repair of the screw could be accomplished at the point where efficiency of the unit is affected. Estimated cost for file replacement is $25,000/unit. Tile replacement will be accomplished when efficiency of the unit is affected. f. Biotower Pump No. 2 and 4 -The Wastewater Division has attempted repairs and currently has a unit at a local machine shop. One (1) each pump will be replaced and the Wastewater Division will evaluate repair or replacement of remaining pump. Tareet completion 12/03/00. g. Final Clarifier No. 1 - No skimmer arm. -The Wastewater Division previously ' solicited bids for the project and received no bids for the project. The project will be re-bid. Tareet Completion 10/30/99. h. Final Clarifier No. 3 -Sludge Pump -The system has been modified such that the existing pumps have been replaced with a submersible pump. The pump is installed and final electrical hook-up is pending receipt of material. Tareet completion 7/30/99. 2. NPDES or Chapter 62 Violations: a. Sewage spill at Septage Receiving Pit. -The Waste Hauler was contacted regarding the spill and afollow-up letter was issued informing the Hauler that future spills may result in suspension or revocation of their Permit to Discharge. The Hauler was also billed for the clean-up costs. Completed 3. Facility's Present Deficiencies: a. Infiltration and Inflow -The Wastewater Division has purchased Grout Sleeve equipment as part of an )n Reduction program and is currently in the process of purchasing Chemical Grouting equipment to aid in the IR Reduction program. The program would be ap on-goine preeram. b. Influent Sampler Tube Bracket -The sample tube has been secured. Completed. c. Refrigerated Influent Sampler Unlocked -The facility is secured in accordance with the requirements of HRS 11-62-08(d) to prevent tampering. However, due to concern by the DOH, the influent sampler has been locked. Completed. d. Bazscreen No. 2 -Repairs to the barscreen were completed. Completed. _ e. Headworks Foul Air System -The enclosures at the barscreens were removed to eliminate Confined Space Hazards when performing maintenance on the Letter to Thomas E. Arizumi Page 3 of 4 July 14, 1999 equipment. No increase in odor problems were caused. Re-evaluation of the system would occur in the event odor problems are encountered in the future. No further action at this time is aroposed. f. Primary Clarifier No. I - Refer to Item l.b. g. Preaeration basin diffusers -The diffusers will be replaced. Target Completion Date 10/30/99. h. Biotower Pumps -Refer to Item l.f: i. Secondary Clarifier No. 1 -Refer to Item l.g. j. Secondary Clarifier No. 3 -Refer to Item l.h k. Effluent Flowmeter Calibration -The flowmeter has been put on a 6 month calibration interval. Completed. 1. Sludge Mix Pump No. 1 Packing leak -The pump was modified and a _ mechanical seal has been installed. Completed m. Waste Gas Burner -The system was designed with a continuous LPG flame to provide automatic re-ignition. The system is not utilized due to the exorbitant costs (1000 gal. LPG/week) of the continuous flame and since samples in the area verifies no accumulation of unburned gas. The system will be re-designed by a consultant to provide automatic re-ignition without a continuous flame. Target Completion 6/30/00. n. Thickened Sludge Pump No. 2 -The stator has been replaced. Completed. o. Centrifuge No. 1 -Refer to Item l.e. p. Electrical Conduits not painted - The conduits will be painted. Target Completion Date 9/30!99. q. Odor Control Pre-Chlorination System Inoperable -The system is not utilized due to the high operating costs and since odor problems are not severe. Re- evaluation of the system would occur in the event odor problems are encountered in the future. No further action at this time is proposed. r. Flow proportioned Chlorination system -The Wastewater Division has obtained a flow proportioned system. Installation is pendigg receipt of all material. Target Completion 12/30/99. s. Chlorine Contact Detention Time -Chlorine Contact is provided in the effluent line. The Wastewater Division will perform a dye test to confirm detention times from the effluent facility to the old Hilo STP facility and will perform bacterial and chorine sampling to ensure NPDES permit requirements are being met. Target Completion 8/30/99. t. Staff' Vacancies -The Sewer Maintenance Supervisor's position has been permanently filled. The County intends to fill the vacant mechanic and Letter to Thomas E. Arizum~ Page 4 of 4 July 14, 1999 assistant operator positions and is pursuing a Tinal resolution to the WTP Supervisor position. Tareet Completion 6/30/00. u. Stairway Railing - An additional rail has been installed. Completed. v. Non-Portable Water Warning Sign -The warning sign has been replaced. Completed. w. Main Security Gate at Access Roadway -Access to the Wastewater Treatment plant during working hours is controlled at the facility by a gate to the plant The gate is posted with a sign indicating that only Authorized Entrants are allowed entry. The access road gate is chained during non-working hours. Failure to connect electrical power to the automatic access road gates was due to an inability to obtain electrical easements. Since access into the facility is controlled, no further action is aroaosed. x. Sewer User Charge Inadequate -The Wastewater Division will be proposing revisions to the Hawaii County Code to increase user rates. Tareet Completion 6/30/00. y. Equipment Replacement Fund -The Wastewater Division will be increasing repairs and replacement of equipment. The County intends to hire a new civil engineer who would be responsible for designing and/or contracting the necessary equipment upgrades or replacement. Consultants will be hired to assist in the work. Should you have any comments or questions on the above please contact Peter Boucher at 961- 8338. Ji A. S ada Dep 'ef Engineer cc: Wastewater Division County Council Public Works Chairperson