Loading...
HomeMy WebLinkAboutWQ0007103_Final Permit_20020724F WRTF �O RQ Michael F. Easley, Governor William G. Ross Jr., Secretary r~ North Carolina Department of Environment and Natural Resources 7 � Q C Alan W. Klimek, P.E., Director Division of Water Quality July 24, 2002 Nick Crane, Secretary Sound of the Sea Master Association Post Office Box 4455 Emerald isle, North Carolina 25594 Subject: Permit No. WQ0007103 Sound of the Sea Master Association Wastewater Treatment/High Rate Infiltration Carteret County Dear Mr. Crane: In accordance with your application received October 15, 2001, and completed July 15, 2002„ we are forwarding herewith Permit No. WQ0007103, dated July 24, 2002, to Sound of the Sea Master Association for the continued operation and modification of the subject wastewater treatment and disposal facilities. A 40,000 GPD Fluidyne sequencing batch reactor plant is to be installed, and an aeration basin and clarifier are to be removed from the existing plant to be utilized as an influent flow equalization unit and an effluent flow equalization unit prior to the filters, respectively. This will reduce the hydraulic capacity of the remaining portion of the existing plant to 20,000 GPD. The resulting total plant will have a treatment capacity of 40,000 GPD. These upgrades are intended to improve treatment performance to resolve the current condition of contravention of groundwater standards for nitrate. This permit shall be effective from the date of issuance until June 30, 2007, shall void Permit No. WQ0007103 issued December 5, 1997, and shall be subject to the conditions and limitations as specified therein. Please pay particular attention to the monitoring requirements in this permit. Failure to establish an adequate system for collecting and maintaining the required operational information will result in future compliance problems. If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to request an adjudicatory hearing upon written request within thirty (30) days following receipt of this permit. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. Unless such demands are made this permit shall be final and binding. VVA 57P n;-lc,l-1T� ,=CT10;i - _ t J 6 L 26 2002 F i h:0Nt-Li1SCHARGE p RfJ,117I 4G Non -Discharge Permitting Unit Internet€tttp://tt2o.enr.state.nc.us/ndpu NC I);--- �i L 1617 Mail Service Center, Rateigh, NC 27699-1617 Telephone (919) 733-5083 Fax (919) 715-6045 DENR Customer Service Center Telephone 1 800 623-7748 An Equal Opportunity Action Employer 50% recycled!10% post -consumer Dauer One set of approved plans and specifications is being forwarded to you, if you need additional information concerning this matter, please contact Ed Beck at the Wilmington Regional Office at (910) 395-3900. Sincerely, Alan W. Klimek, P.E. cc: Carteret County Health Department Wilmington Regional Office, Water Quality Section Wilmington Regional Office, Groundwater Section Groundwater Section, Central Office Technical Assistance .and Certification Unit Non -Discharge Compliance/Enforcement Unit Water Quality Central Files NDPU Files i 2,J ram„?. �i 7 C PF�'�/, 2 NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMNUSSION DEPARTMENT OF ENN'IRO1NTNMNT AND NATURAL RESOURCES RALEIGH HIGH RATE INFILTRATION SYSTEM PERMIT In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and other applicable Laws, Rules, and Regulations PERMISSION IS HEREBY GRANTED TO Sound of the Sea Master Association Carteret County modification and continued operation of a 40,000 GPD wastewater collection and treatment facility with disposal by high rate infiltration. A 40,000 GPD Fluidyne sequencing batch reactor treatment plant is to be installed, and the existing plant is to be modified by the removal of an aeration basin and clarifier and the installation of an influent flow equalization unit and a secondary effluent flow equalization unit. The facility is to consist of: approximately 1,810 linear feet of 8-inch gravity sewer, approximately 90 Iinear feet of 10-inch gravity sewer, an 80 GPM pump station with dual pumps, high water alarms, standby power, and approximately 30 linear feet of 4- inch force main, a newly installed 40,000 GPD 1~luidyne sequencing batch reactor treatment plant, a modified tertiary treatment plant to now have a single 20,000 gallon aeration basin, a single clarifier, a 20,000 gallon influent flow equalization basin with dual 28 GPM peristaltic pumps, an equalization basin prior to the filters with dual pumps and flow control splitter box, dual aerated sludge holding tanks, dual high rate tertiary filters with back wash pumps, two 125 CFM blowers, dual chlorinators, a chlorine contact basin, an effluent dosing tank with dual 75 GPM pumps, an automatically activated emergency power generator, two 62-foot diameter high rate infiltration units, and all associated piping, valves and appurtenances. This facility will serve one hundred ten homes in Phase I of the Sound of the Sea Townhomes, with no discharge of wastes to the surface waters, pursuant to the application received October 15, 2001, and completed July 15, 2002, and in conformity with the project plan, specifications, and other supporting data subsequently filed and approved by the Department of Environment and Natural Resources and considered a part of this permit. This permit shall be effective from the date of issuance until June 30, 2007, shall void Permit No. WQ0007103 issued December 5, 1997, and shall be subject to the following specified conditions and hinitations: L PERFORMANCE STANDARDS Upon completion of construction and prior to operation of this permitted facility, a certification must be received from a professional engineer certifying that the permitted facility has been installed in accordance with this permit, the approved plans and specifications, and other supporting materials. If this project is to be completed in phases and partially certified, You shall retain the responsibility to track further construction approved under the same permit, and shall provide a final certificate of completion once the entire project has been completed. Mail the Certification to the Non -Discharge Permitting Unit, 1617 Mail Service Center, Raleigh, NC 27699-1617. 2. The Wilmington Regional Office, telephone number (910) 395-3900, shall be notified at least forty- eight (48) hours in advance of operation of the installed facilities so that an in -place inspection can be made. Such notification to the regional supervisor shall be made during the normal office hours from 8:00 a.m. until 5:00 p.m. on Monday through Friday, excluding State Holidays. 3. In the event that the facilities fail to perform satisfactorily, including the creation of nuisance conditions, the Permittee shall take immediate corrective actions, including those actions that may be required by the Division of Water Quality (Division), such as the construction of additional or replacement wastewater treatment or disposal facilities. 4. This permit shall become voidable if the soils fail to adequately assimilate the wastes and may be rescinded unless the facilities are installed, maintained, and operated in a manner which will protect the assigned water quality standards of the surface waters and ground waters. The ponding of wastewater on the surface of the distribution field when the dosing cycle commences shall be considered as evidence of failure of the soils to adequately assimilate the wastewater. Additionally, such failure shall be interpreted as a violation of this permit condition. The residuals generated from these treatment facilities must be disposed in accordance with General Statute 143-215.1 and in a manner approved by the Division. Adequate measures shall be taken to divert stormwater from the high rate infiltration area and to prevent wastewater runoff. Diversion or bypassing of untreated wastewater from the treatment facilities is prohibited. The issuance of this permit shall not relieve the Permittee of the responsibility for damages to surface or groundwaters resulting from the operation of this facility. 9. The following buffers shall be maintained: a) 400 feet between high rate infiltration unit and any habitable residence or place of public assembly under separate ownership or which is to be sold, b) 200 feet between high rate infiltration unit and any private or public water supply source and any streams classified as WS or B, c) 200 feet from mean high water between high rate infiltration unit and any "SA" or "SB" classified surface waters, d) 200 feet from normal high water between high rate infiltration unit and any other stream, canal, marsh, or coastal waters, e) 200 feet from normal high water between high rate infiltration unit and any Class I or Class R impounded reservoir used as a source of drinking water, f) 200 feet between high rate infiltration unit and any other lake or impoundment, g) 200 feet between high rate infiltration unit and any Drainage systems (ditches, drains, surface water diversions, etc.) and from any groundwater lowering and surface drainage ditches, h) 100 feet between high rate infiltration unit and property lines, i) 50 feet between treatment units and property lines, and j) 50 feet between high rate infiltration unit and other treatment units and public right of ways. Some of the buffers specified above may not have been included in previous permits for this waste treatment and disposal system. These buffers are not intended to prohibit or prevent modifications, which are required by the Division, to improve performance of the existing treatment facility. These buffers do, however, apply to modifications of the treatment and disposal facilities which are for the purpose of increasing the flow that is tributary to the facility. These buffers do apply to any expansion or modification of the high rate infiltration areas and apply in instances in which the sale of property would cause any of the buffers now complied with, for the treatment and disposal facilities, to be violated. The applicant is advised that any modifications to the existing facilities will require a permit modification. 10. A usable green area shall be maintained for wastewater disposal. The green area shall have the capability of accommodating the average daily flow of the facility being served without exceeding the loading rates of the green area. A "green area", as defined in 15A NCAC 2H .0404 (g)(7), is an area suitable for waste disposal, either in its natural state or which has been modified by planting a vegetative cover of grasses or low growing shrubbery. II. OPERATION AND MAINTENANCE REQUIREMENTS 1. The facilities shall be properly maintained and operated at all times. 2. Upon classification of the facility by the Water Pollution Control System Operator Certification Commission (WPCSOCC), the Permittee shall employ a certified wastewater treatment plant operator to be in responsible charge (ORC) of the wastewater treatment facilities. The operator must hold a certificate of the type and grade at least equivalent to or greater than the classification assigned to the wastewater treatment facilities by the WPCSOCC. The Permittee must also employ a certified back- up operator of the appropriate type and grade to comply with the conditions of 15A NCAC 8G .0202. The ORC of the facility must visit each Class I facility at least weekly and each Class 11, III, and IV facility at least daily, excluding weekends and holidays, and must properly manage and document daily operation and maintenance of the facility and must comply with all other conditions of 15A NCAC 8G .0202. Once the facility is classified, the Permittee must submit a letter to the WPCSOCC which designates the operator in responsible charge within thirty days after the wastewater treatment facilities are 50% complete. The application rates for the high rate infiltration system shall not exceed 6.7 GPD/Sq Ft. 4. The facilities shall be effectively maintained and operated as a non -discharge system to prevent the discharge of any wastewater outside of the high rate infiltration disposal area, which result from the operation of this facility. 5. No traffic or equipment shall be allowed on the disposal area except while installation occurs or while normal maintenance is being performed. The high rate infiltration fields shall be raked at least twice weekly during the months April through October and once a week during the months of November through March. The screenings removed from the wastewater treatment plant shall be properly disposed in a sanitary landfill or by other means which have been approved by this Division. Vegetative growth must be kept out of the high rate infiltration areas at all times. All vegetation must be removed manually so that minimal disturbance will occur to the disposal area. The application of chemicals to the infiltration fields is expressly prohibited. 10. An automatically activated standby power source shall be on site and operational at all times. If a generator is employed as an alternate power supply, it shall be tested weekly by interrupting the primary power source. 11. The flow measurement device shall be calibrated annually by a representative of a firm which is routinely engaged in the calibration of flow measurement devices. Records of this calibration, including all information pertinent to the calibration, shall be available during any inspection by Division staff. 12. Diffusers shall be cleaned as needed to ensure that adequate aeration is provided. Records of this maintenance shall be maintained by the Permittee. 13. The chlorine tablets used in the disinfection facility shall be of the kind and type specified in the plans and specifications approved by the Division. 14. The following activities must be completed by the Sound of the Sea Master Association as soon as possible: a. Rusted gratings and railings shall be repaired and stabilized. In addition, the existing tanks shall be prepared and repainted. b. The tertiary filters shall be refurbished as soon as possible to allow them to function properly. c. Dual blowers shall be maintained for reliability to operate the remaining portion of the original plant. d. The effluent pump station shall be improved to provide complete coverage of the high rate infiltration disposal system. III, MONITORING AND REPORTING REQUIREMENTS 1. Any monitoring deemed necessary by the Division to insure surface and ground water protection will be established and an acceptable sampling reporting schedule shall be followed. 2. Flow shall be continuously monitored and daily average flow values shall be reported on Form NDMR. Flow measurement devices shall be. capable of measuring flows with a maximum deviation of less than 10 percent from true flow, accurately calibrated at a minimum of once per year, and maintained to ensure that the accuracy of the measurements is consistent with the accepted capability of that type of device. Records of flow measurement device calibration shall be kept on file by the Permittee for a period of at least three years. At a minimum, data to be included in this documentation shall be: a. Date of flow measurement device calibration b. Name of person performing calibration c. Percent from true flow 3. As an indicator of proper operation and maintenance, the facility shall produce an effluent in compliance with the following limitations: Parameter Monthly Average a Daily Maximum c Flow 40,000 GPD BOD5 (5-day, 20'C) 10 mg/l NH3 as N 4 mg/l TSS 20 mg/l b Fecal Coliform 14 per 100 ml 43 per 100 ml Monthly averages for all but fecal coliform shall be the arithmetic mean of all samples collected during the reporting period. 6 Monthly average for fecal coliform shall be the geometric mean of all samples collected during the reporting period. c Daily maximum shall be the maximum value of all samples collected during the reporting period. 4 The effluent from the subject facilities shall be monitored, by the Permittee, at the point prior to discharge to the high rate infiltration system for the following parameters: Parameter _Sampling Point Sampling Frequency _ Type of Sample Flow Influent or Effluent Continuous Recording BODS (5-day, 20°C) Effluent *2/Mon1h Composite NH3 as N Effluent *2/Month Composite TSS Effluent 2/Month Composite Fecal Coliform Effluent 2/Month Grab Settleable Matter Effluent Daily Grab Residual Chlorine Effluent Daily Grab NO3 EffluentTriannually Grab TDS Effluent * Triannually Grab TOC Effluent **Triannually Grab Chloride Effluent **Triannually Grab The effluent pH shall not be less than 6.0 standard units nor greater than 9.0 standard units. 2/Month sampling frequency only during the months of April through October. During the remainder of the year, these parameters shall be monitored monthly. Triannually sampling shall be conducted during March, July, and November. If Groundwater sampling indicates or predicts problems with compliance with of the Groundwater Standards, this permit will be modified to include additional and/or more restrictive limitations. 4. Three (3) copies of all operation and disposal records (as specified in condition In 2) on Form NDAR-1 and three (3) copies of all effluent monitoring data (as specified in condition III 3 and III 4) on Form NDMR-1 shall be submitted on or before the last day of the following month. All information shall be submitted to the following address: NC Division of Water Quality Water Quality Section Non -Discharge Compliance/Enforcement Unit 1617 Mail Service Center Raleigh, North Carolina 27699-1617 5. A record shall be maintained of all residuals removed from this facility. The record shall include the name of the hauler, the permit authorizing the disposal or a letter from a municipality agreeing to accept the residuals, the date the residuals were hauled, and the volume of residuals removed. 6, A maintenance log shall be maintained at this facility including, but not limited to, the following items: a. Daily sampling results including residual chlorine, settleable matter, and dissolved oxygen in the aeration basin and at the clarifier weir; b. Visual observations of the plant and plant site; c. Record of preventative maintenance (changing of filters, adjusting belt tensions, alarm testing, diffuser inspections and cleanings, etc.); d. Date of calibration of flow measurement device; e. Date and results of power interruption testing on alternate power supply; and f. Dates fields were raked and arms inspected. 5 7. Noncompliance Notification: The Permittee shall report by telephone to the Wilmington Regional Office, telephone number (910) 395-3900, as soon as possible, but in no case more than 24 hours or on the next working day following the occurrence or first knowledge of the occurrence of any of the following: a. Any occurrence at the wastewater treatment facility which results in the treatment of significant amounts of wastes which are abnormal in quantity or characteristic, such as the dumping of the contents of a basin or tank, the known passage of a slug of hazardous substance through the facility, or any other unusual circumstances; b. Any process unit failure, due to known or unknown reasons, that renders the facility incapable of adequate wastewater treatment, such as mechanical or electrical failures of pumps, aerators, compressors, etc.; c. Any failure of a pumping station, sewer line, or treatment facility resulting in a by-pass of all or any portion of the influent to such station or facility; or d. Any time that self -monitoring information indicates that the facility is not in compliance with its permit limitations. Persons reporting such occurrences by telephone shall also file a written report in letter form within five (5) days following first knowledge of the occurrence. This report must outline the actions taken or proposed to be taken to ensure that the problem does not recur. IV. GROUNDWATER RE UMEMENTS 1. Monitor wells MW-2, MW-4, MW-5, and MW-6 shall be monitored every March, July, and November for the following parameters: Static Water Level pH Chloride Total Dissolved Solids (TDS) Fecal Coliforms Total Organic Compounds (TOC) Nitrate (NO3) Total Ammonia Total Phosphorous Volatile Organic Compounds - In November only using one of the following: (A) Standard Method 6230D, PQL at 0.5 ug/L or less (B) Standard Method 621 OD, PQL at 0.5 ug/L or less (C) EPA Method 8021, Low Concentration, PQL at 0.5 ug/L or less (D) EPA Method 8260, Low Concentration, PQL at 0.5 ug/L or less (E) Another method with prior approval by the Groundwater Section Chief Any method used must meet the following qualifications: (1) A laboratory must be DWQ certified to run any method used. (2) The method used must, at a minimum, include all the constituents listed in Table VIII of Standard Method 6230D. (3) The method used must provided a PQL at 0.5 ug[L or less which must be supported by laboratory proficiency studies as required by the DWQ Laboratory Certification Unit. Any constituents detected above the MDL but below the PQL at 0.5 ug/L must be qualified (estimated) and reported. If any volatile organic compounds are detected by the methods listed, then the Raleigh Regional Office Groundwater Supervisor, telephone number (919) 571-4700, must be contacted immediately N for further instructions regarding any additional follow-up analyses required. The results of all initial and follow-up analyses must be submitted simultaneously. The measurement of water levels must be made prior to sampling for the remaining parameters. The depth to water in each well shall be measured from the surveyed point on the top of the casing. The measuring points (top of well casing) of all monitoring wells shall be surveyed to provide the relative elevation of the measuring point for each monitoring well. If TOC concentrations greater than 10 mg/1 are detected in any downgradient monitoring well, additional sampling and analysis must be conducted to identify the individual constituents comprising this TOC concentration. If the TOC concentration as measured in the background monitor well exceeds 10 mg/l, this concentration will be taken to represent the naturally occurring TOC concentration. Any exceedances of this naturally occurring TOC concentration in the downgradient wells shall be subject to the additional sampling and analysis as described above. The results of the sampling and analysis must be received on Form GW-59 (Groundwater Quality Monitoring: Compliance Report Form) by the Groundwater Section, Permits and Compliance Unit, 1636 Mail Service Center Raleigh, N.C. 27699-1636 on or before the last working day of the month following the sampling month. 2. Any additional groundwater quality monitoring, as deemed necessary by the Division, shall be provided. The COMPLIANCE BOUNDARY for the disposal system is specified by regulations in 15A NCAC 2L, Groundwater Classifications and Standards. The Compliance Boundary for the disposal system constructed prior to December 31, 1983 is established at either (1) 500 feet from the waste disposal area, or (2) at the property boundary, whichever is closest to the waste disposal area. An exceedance of Groundwater Quality Standards at or beyond the Compliance Boundary is subject to immediate remediation action in addition to the penalty provisions applicable under General Statute 143- 215.6A(a)(1). In accordance with 15A NCAC 2L, a REVIEW BOUNDARY is established around the disposal systems midway between the Compliance Boundary and the perimeter of the waste disposal area. Any exceedance of standards at the Review Boundary shall require remediation action on the part of the Permittee. 4. The COMPLIANCE BOUNDARY for the disposal system is specified by regulations in 15A NCAC 2L, Groundwater Classifications and Standards. The Compliance Boundary is for the disposal system constructed after December 31, 1983 is established at either (1) 250 feet from the waste disposal area, or (2) 50 feet within the property boundary, whichever is closest to the waste disposal area. An exceedance of Groundwater Quality Standards at or beyond the Compliance Boundary is subject to immediate remediation action in addition to the penalty provisions applicable under General Statute 143-215.6A(a)(1). In accordance with 15A NCAC 2L, a REVIEW BOUNDARY is established around the disposal systems midway between the Compliance Boundary and the perimeter of the waste disposal area. Any exceedance of standards at the Review Boundary shall require remediation action on the part of the Permittee. 5. All wells that are constructed for purposes of groundwater monitoring shall be constructed in accordance with 15A NCAC 2C .0108 (Standards of Construction. for Wells Other than Water Supply) and any other state and local laws and regulations pertaining to well construction. 6. The Wilmington Regional Office, telephone number (910) 395-3900, shall be notified at least forty- eight (48) hours prior to the construction of any monitoring well so that an inspection can be made of the monitoring well location. Such notification to the regional groundwater supervisor shall be made during the normal office hours from 8:00 a.m. until 5.00 p.m. on Monday through Friday, excluding state holidays. Within sixty (60) days of completion of all monitoring wells, the Permittee shall submit two original copies of a scaled topographic map (scale no greater than 1":100') signed and sealed by a professional engineer or a state licensed land surveyor that indicates all of the following information: a. the location and identity of each monitoring well, b. the location of the waste disposal system, c. the location of all property boundaries, d. the latitude and longitude of the established horizontal control monument, e. the relative elevation of the top of the well casing (which shall be known as the "measuring point"), and f. the depth of water below the measuring point at the time the measuring point is established. The survey shall be conducted using approved practices outlined in North Carolina General Statutes Chapter 89C and the North Carolina Administrative Code Title 21, Chapter 56. The surveyor shall establish a horizontal control monument on the property of the waste disposal system and determine the latitude and longitude of this horizontal control monument to a horizontal positional accuracy of +/- 10 feet. All other features listed in a. through e. above shall be surveyed relative to this horizontal control monument. The positional accuracy of features listed in a. through e. above shall have a ratio of precision not to exceed an error of closure of 1 foot per 10,000 feet of perimeter of the survey. Any features located by the radial method will be located from a minimum of two points. Horizontal control monument shall be installed in such a manner and made of such materials that the monument will not be destroyed due to activities that may take place on the property. The map shall also be surveyed using the North American Datum of 1983 coordinate system and shall indicate the datum on the map. All bearings or azimuths shall be based on either the true or NAD 83 grid meridian. If a Global Positioning System (GPS) is used to determine the latitude and longitude of the horizontal control monument, a GPS receiver that has the capability to perform differential GPS shall be used and all data collected by the GPS receiver will be differentially corrected. The maps and any supporting documentation shall be sent to the Groundwater Section, N.C. Division of Water Quality 1636 Mail Service Center Raleigh, N.C. 27699-1636. 8. Upon completion of all well construction activities, a certification must be received from a professional engineer certifying that the monitoring wells are located and constructed in accordance with the Well Construction Standards (15A NCAC 2C) and this permit. This certification should be submitted with copies of the Well Completion Form (GW-1) for each well. Mail this certification and the associated GW-1 forms to the Permits and Compliance Unit, Groundwater Section, 1636 Mail Service Center, Raleigh, NC, 27699-1636. 9. For the initial sampling of a well, the Permittee shall submit a copy of the OW-1 Form (Well Completion Form) with the Compliance Monitoring Form (GW-59) for that well. Compliance Monitoring Forms that do not include copies of the GW-1 form will be returned to the Permittee without being processed. Failure to submit these forms as required by this permit may result in the initiation of enforcement activities pursuant to NC General Statutes 143-215.6. 10. The monitor wells must have identification plates and locks securing the wells against unauthorized access and use in accordance with 15A NCAC 2C .0108. V. INSPECTIONS Adequate inspection, maintenance, and cleaning shall be provided by the Permittee to insure proper operation of the subject facilities. The Permittee or his designee shall inspect the wastewater treatment and disposal facilities to prevent malfunctions and deterioration, operator errors and discharges which may cause or lead to the release of wastes to the environment, a threat to human health, or a nuisance. The Per -ittee shall maintain an inspection log or summary including at least the date and time of inspection, observations made, and any maintenance, repairs, or corrective- actions taken by the Permittee. This log of inspections shall be maintained by the Permittee for a period of three years from the date of the inspection and shall be made available to the Division or other permitting authority, upon request. Any duly authorized officer, employee, or representative of the Division may, upon presentation of credentials, enter and inspect any property, premises or place on or related to the disposal site or facility at any reasonable time for the purpose of determining compliance with this permit, may inspect or copy any records that roust be maintained under the terms and conditions of this permit, and may obtain samples of groundwater, surface water, or leachate. VI. GENERAL CONDITIONS This permit shall become voidable unless the facilities are constructed in accordance with the conditions of this permit, the approved plans and specifications, and other supporting data. This permit is effective only with respect to the nature and volume of wastes described in the application and other supporting data. This permit is not transferable. In the event there is a desire for the facilities to change ownership, or there is a name change of the Permittee, a formal permit request must be submitted to the Division accompanied by an application fee, documentation from the parties involved, and other supporting materials as may be appropriate. The approval of this request will be considered on its merits and may or may not be approved. 4. The subject wastewater treatment and disposal facilities shall be connected to an operational publicly owned wastewater collection system within 180 days of its availability to the subject facilities, if the subject wastewater treatment or disposal facilities are in noncompliance with the terms and conditions of this non -discharge permit or the governing statutes or regulations. Prior to the initiation of these connection activities, appropriate approval must be received from this Division. The annual administering and compliance fee must be paid by the Permittee within thirty (30) days after being billed by the Division. Failure to pay the fee accordingly may cause the Division to initiate action to revoke this permit as specified by 15A NCAC 2H .0205 (c)(4). Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to an enforcement action by the Division in accordance with North Carolina General Statute 143- 215.6A to 143-215.6C. The issuance of this permit does not exempt the Permittee from complying with any and all statutes, rules, regulations, or ordinances which may be imposed by other government agencies (local, state, and federal) which have jurisdiction, including but not limited to applicable river buffer rules in 15A NCAC 2B.0200, erosion and sedimentation control requirements in 15A NCAC Chapter 4 and under the Division's General Permit NCG010000, and any requirements pertaining to wetlands under 15A NCAC 2B .0200 and 2H .0500. A set of approved plans and specifications for the subject project must be retained by the Permittee for the life of this project. 9. The Permittee, at least six (6) months prior to the expiration of this permit, shall request its extension. Upon receipt of the request, the Commission will review the adequacy of the facilities described therein, and if warranted, will extend the permit for such period of time and under such conditions and limitations as it may deem appropriate. Permit issued this the 24t' day of July 2002 NORTH CAROLINA ENVIRONMENTAL MANAGEMENT COMMISSION f , Alan W. Klimek, P.E., Director Division of Water Quality By Authority of the Environmental Management Commission Permit Number WQ0007103 10 Permit No, WQ0007103 ENGINEER'S CERTIFICATION Partial Final L , as a duly registered Professional Engineer in the State of North Carolina, having been authorized to observe (periodically, weekly, full time) the construction of the project, Project Name Location and County for the Permittee hereby state that, to the best of my abilities, due care and diligence was used in the observation of the construction such that the construction was observed to be built within substantial -compliance and intent of this permit, the approved plans and specifications, and other supporting materials. Signature Registration No. Date Wait` & AssociATES P.O. Box 8847 GREENSBORO. NC 27419-0847 336-292- 1 62 1 FAX; 335-292- 1 62 1 ------------- July 14, 2002 Mr. Edward Beck Environmental Engineer DWQ 127 Cardinal Drive Ext. Wilmington, NC 28405-3845 RE: Sound of the Sea Response to 02 July 2002 E-mail Dear Mr. Beck: The following responses are in the same sequence as the comments in the referenced E-mail: 1. There are two (2) 2-inch waste sludge pipelines. One waste sludge pipeline from each aspirator pump, Waste sludge in the form of mixed liquor is returned to the trash/sludge tank every time an aspirator pump operates. Ball valves on the waste sludge pipelines are used by the operator to maintain the desired MLSS in the reactor (SAM + SBR). The liquid level in the trash/sludge tank is six (6) feet higher than the top of the plant 42 aerobic digester. This six (6) feet difference in hydrostatic head is adequate to get gravity waste sludge flow to plant 42 aerobic digester. The 3-inch line is continuous from the trash/sludge tank: to plant 42 aerobic digester. There is a tee and a removable cap that allows for complete draining of the trash/sludge tank by either hauling, and/or pumping to the equalization tank using a portable pump. The drip sump is intended to collect drippings. 2. The existing splitter box is to remain useable. At the appropriate time, the existing drain line from the existing splitter box back to the existing pump station will be plugged at the splitter box. The existing splitter box weirs, one discharging to plant # 1, and one discharging to plant 42, will remain useable. Plant #2 aeration tank will be converted to and function as the equalization (20,000 gallon capacity) tank. The peristaltic pumps will discharge to either the SBR or to the existing splitter box. When discharging to the existing splitter box, the existing weirs will divide the flow. One half of the flow, 14 gpm, will discharge to plant # 1, and one half, 14 gpm, will discharge back into the equalization tank. All flow, 28 gpm, can be directed into plant #i l simply by using a temporary plug to block the discharge to the equalization tank. Each existing weir is capable of discharging in excess of 28 gpm without overflowing the splitter box. 3. Hose type peristaltic pumps are essentially volumetric pumps. The discharge rate is directly proportional to pump RPM. The peristaltic pump discharge rate does not vary with the variation in total discharge head as Mr. Edward Beck: Page 2 July 14,2002 does a centrifugal pump. Attached is a typical peristaltic pump discharge versus RPM curve, and a Blackmer peristaltic pump spec sheet. Initially, two (2) ex-tra hoses will be purchased. When one spare hose is used, a replacement will be ordered and will be purchased. This way, there will always be at least one spare hose on hand. Normally, at least two (2) operating, maintenance and spare parts list manuals are supplied with each new item of equipment purchased. Since two (2) new peristaltic pumps will be purchased, two not four O/M manuals ,Mll be furnished. Repair support is readily available from pump distributors in Raleigh, NC, and Richmond, VA. Repair support and spare parts are readily available from factory locations in Oklahoma, Michigan, and Illinois. We sincerely appreciate your assistance. Please advise of questions and/or need for additional information. We are prepared to meet with you at a mutually convenient time. Please advise. Thanks for your help. Very truly yours, Wojek & Associates r Donald M. Wojek- cc : Nick Crane file Page I of 1 Donald Wojek From; Ed Beck <Ed.BeckOncmail_net> To: Donald Wojek <sdwojekA_wortdnet.att.net> Cc: Nick Drane <nickccmcQtcpl .com> Sent: Tuesday, July 02, 2002 2,40 PMl Attach: Ed_Beck.vcf Subject: Re: Sound of the Sea Proposal Don After reviewing the submittal I have a few comments: 1. Sheet 2 of 9 indicates a 3" underground drain running from the drip sump located at the trash trap/sludge disposal tank in the SBR to the sludge digester in plant 92. Will this also transfer waste sludge from the rea ;tor? A 2" waste sludge pipe is indicated in the SBR plan but it is not clear how it functions. What is the means for moving the material through the 3" pipe froth the drip sump to the sludge digester? 2. It appears that the existing splitter box at the head of the old plant is to remain in place and continue to overflow back to tine raw waste influent pump station. Why not divert the overflow to the new flow equalization tank? The old plant side 91 will be used during low flo-w periods but it also trust be available to accept the entire design flow during an emergency when the SBR must be taken out of service. How will you send the entire design flow to plant 41? The splitter box could be modified to split the flow and send one side to the EQ basin. or to send both sides to the head of plant #1. 3. Pump specifications and performance curves are needed for the Biackrner Peristaltic Pumps. Also, spare hoses must be supplied to the operator along with an operational manual, is repair support readily available for these pumps? A reply is needed so I can continue with permit preparation Thank you Ed Beck 7/4ft12 Blackmer: Enterprise Compressor __.. Page l' of 1 Fi0v. �CLR�lEJIo�I�S �1 AW Ow .4MOV 0 t[ ,javJ_ r,:a_ r ff ff ff , �J Industries We Serve ; I Product Offerings duct Selector � i Site Search Peristaltic Pumps Applications From viscous and/or abrasive sludges to water thin, non -lubricating fluids, corrosive chemicals or sheer sensitive materials, Blackmer's Abaque series peristaltic pump is the technology of choice. Due to the unique operating principle of this pump, typical applications span from wastewater to chemical processing to food manufacturing. Features and Benefits • Available in 14 different sizes that provide flow rates of .07 to 290 gpm (15 to 66,000 L/h). ■ Will handle abrasive fluids with little wear since only the hose and hose inserts are in contact with the material being pumped. ■ Since only the inside of the hose and hose inserts are in contact with the pumpage, aggressive and contaminated fluids can be processed without the devastating damage experienced by other pumping technologies. • Hoses are constructed of natural rubber, Buna, or EPDM within the pump's casing, provide high levels of volumetric accuracy for sampling, transfer, and metering applications. ■ Ability to pass solids in the material being pumped. • Dry -run capability allows tank and line stripping. ■ Seal -less design eliminates leaks, contamination and wear problems associated with difficult to seal products. ■ Self -priming up to 29.5 feet (9 meters). • Reversible operation allows pumping in both directions. ■ Durable construction of ductile iron and steel construction allow higher discharge pressures up to 217 psi (15 bar). ■ Low maintenance requirements of the hose and shoes. Specification Information ,flack to Peristaltic Pumps J OALE PROVIDING A DW TrCHN000- Y WORDW1D&, blackmail A Dover Company Copyright Notice http://xvww.blaclaner.comlfb-peristaitic.asp 7/14/02 Saman►t Company 28WO92 Commerdai Avenue • Barrinitor-(, IL 60010 . 1-600-637-3739 • Fax: 1-847-381-7053 a Web Site: www.bamartt.com PX so 1dow --......._... I......... ...... .... I'-,.... I..... -, W 60 0 is V AS 66 7b 106 120 136 1a� 1E6 r sr..d W, - F f4L 77C/Y� to 10 :-G rrl o I�2 rr, i continuous Putt/ Speed iR Maximum Pressure PSIG Bar 3012 _ _,RPM Intermittent Duty Speed r RPM 165 Maximum 5ucrvon loft Feet I Meter 23 / 7 . Max. Contnuou5 Tenloerature °F IOC 140 + 60 1 Maximum V&:Osi CPS 35 G00 Max Intermittent Temperature OF °C 176 60 t Page 5 1Date: 2006-04-17 WOJEK & ASSOCIATES PO Box 8847 • Greensboro, NC 27419-0847 (336) 235-2161 • Far (336) 235-2161 Mr. Edward Beck Environmental Engineer Division of Water Quality 127 Cardinal Drive Ext. Wilmington, NC 28405-3845 SUBJECT: Sound of the Sea Emerald Isle, NC Dear Mr. Beck: June 20, 2002 i f J N 24 -1,302 In accordance with discussions at our 6/12/02 meeting in Wilmington, transmitted herewith are five (5) sets of revised project drawings. These revised drawings detail flow equalization to the existing tertiary filters and raw sewage flow equalization. Additionally, hereinafter, the following items are discussed: --Raw sewage flow equalization --Waste sludge handling --Alternating plant 4 1 / SBR --Existing tertiary filter evaluation Raw Sewage Flow Egualiration Existing plant 42 aeration basin will be utilized as the Raw Sewage Flow Equalization Basin. All raw sewage will be pumped from the existing Raw Sewage Lift Station into plant 42 aeration basin. Existing Raw Sewage Lift Station currently discharges to a splitter box located at plant 41 and plant #2. The raw sewage force main will be repiped to discharge into plant #2 aeration basin (Equalization Basin). Two (2) new hose type peristaltic pumps will be installed over the top of the Equalization Basin (EB). Each pump has a constant speed capacity of 28 GPM. Each pump will take suction from the EB. Each pump discharge will be connected in a common manifold. The manifold will discharge through a manually operated valve to the SBR or through a manually operated valve to the existing raw sewage splitter box. When discharging to the SBR, the valve to the existing splitt-:-r box will be closed. When discharging to the existing splitter box, the vaive to the SBR will be closed. When raw sewage is pumped to the existing raw sewage splitter box, both v-notch weirs will be utilized. This will direct about 14 GPM to plant #1 and, simultaneously, about 14 GPM back into the EB. The raw sewage splitter box overflow piping will direct excess flow back to the Raw Sewage Lift Station. Mr_ Edward Beck June 20, 2002 page 2 The equalization pumps will be manually adjustable float switch actuated and manually adjustable timer controlled. Only one equalization pump will be operating at any time. Rising water will cause a float switch to start one pump. This pump will discharge a constant 28 GPM until falling water level causes a float switch to shut the pump off or the timer times out and shuts the pump off. If the float switch shuts off the pump, the timer holds the time cycle time remaining until the rising water level float switch causes that pump to restart. When the timer times out and the water level is above the pump on float switch, the timed -out pump will stop, an alternator- will switch to the second pump, and the second pump will start. The second pump will continue to operate until either shut off by falling water level or shut off by timed -out timer. Float switches are provided for low water level alarm, pump off, pump on, and high water level alarm. Initially, with EB floor considered zero (0), low alarm would be 0.75 feet, pump off at 1.25 feet, pump on at 2.0 feet, and high alarm at 6.0 feet. Run timer would be set for minimum 30 minute cycle and maximum 45 to 60 minute cycle. Waste Sludge Handlin Waste sludge from plant 91 will be handled as it has always been handled. Waste sludge is pumped into the digester with supernatant being returned to aeration until digester sludge is thickened. Lime is then added and the digester contents aerated while maintaining a high pH. Waste sludge from the SBR will be piped to plant #2 digester. Supernatant will automatically overflow to the EB until digester sludge is thickened. Lime is then added and the digester contents aerated while maintaining a high pH. Liquid level in the SBR is about 5 feet higher than in the plant #2 digester. Therefore, gravity flow will be utilized. Current ORC practice is to use permitted contract hauler to remove stabilized sludge and dispose of the sludge on permitted land. Alternating Plant #I /SBR The ORC, Don O'Mara, briefly discussed starting up a previously out -of -service plant. Several days before the day of intended start-up, a portable pump is used to pump aeration contents from the operating plant to the start-up plant. Transfer pumping is normally done during the day and over several days. After the start-up plant is full or deemed adequately full, raw wastewater is directed into the start-up plant. The ORC has reported no problems using this method. Mr. Edward Beck June 20, 2002 page 3 Ex7Stinp, Tertiary Filter Evaluation At the 6/12/02 meeting, it was agreed that the existing filters would be "re -bedded" as quickly as possible and that repairs to piping, etc. would be Clone as necessary for the coming summer season. An evaluation will be conducted beginning 9/16/02, with a report being issued by 12/2/02. Your assistance and cooperation are sincerely appreciated. Please advise of questions and/or need for additional information. Very truly yours, K , ASSO MATES Donald M. Wojek, PE DMW/cag cc: Nick Crane Don O'Mara file u A-/z/ - r C a o Z. r L -2 Vo L-GrIY15s (6 —)e6)—±L2 L /2 x 6 x (; . �% 3Z 4,= 1) s, kqD G- XL. Flo 7 "7ORK Nrwo 1 . DOD L 47/0/i) Qao l /Z159 1 ] EtDtJ/�-L . 1%a L- u /Y) = (70 (��W - ;56 ) 7 /, �/ = LCJ©AKl&)r, VOL. i3[sti4 �" P�r=C r ' 1 2 61 217 (4/ 5210 j r t� r ICD.S r�too 1 r 71IZ4 � 1 7 L HEAD CAPACITY CURVE - a - MODEL 137-139-140.4140 '14W 4'401 17 ;CrAL DYNAM;C HZAD/CAPA-.TY v_R wNUTE �` A �- Err'LUENT AND DEWATERINC MCDELS 137/1.19 I MDDELS - "- 1 140/4143 ri IMe1a,s ! C°1 LL,, I Cal ' ,!- ° s + 57 i 13 I 55, 1- � 356 +a 3 a5 I 70 I ]Y6 so J.I a I I N I 7.2 { aJ I s,. i zo I e 10 I 36 I 116 Ja i ,. I I - 53 Im 3s '0 6, ° _ , 67 tea X l ,I. 1 T-� -- .. 76' o, I r � J� p x i' $K773 A 2 C f7 1371139 4 314 7318 8118 4314 12314 4 140 4 31a B 51t6 8 13132 4 314 15 n u4 4140 4 314 $ 5116 8 13132 4 3l4 18 25132 5 114 ac +ao 7. so -ao r-Dw aE.R +AWuTE CONSULT FACTORY FOR SPECIAL APPLICATIONS • Tnree anase pumps are available in 2001208V or 230V-1371139 Models. Variable level control swilcnes are available for controlling single and three ''=iectncai alternators, for duplex systems, are available and supplied with phase systems. an alarm. Double piggyback variable level float switches are available for variable level Mecnarlical alternators. for duplex systems, are available with or without long Cycle controls. alarm switches. Long cords are available in lengths of 15-25-35-50 feet. (Maximum 25' length Comoinalion starters are available for 3 phase Dumps. for 140/4140 modets @ 115V) Control alarm systems are available for 1 phase pumps. • Over 1307. (54'C.) special quotation required. -7 ,os i 39 Series - 51 Ibs 140 Series - 53 lbs 4140 Series - 731tis Refer to FM0806 for 200° F, applications. Single Seal ! Control Selection Listings Model I Volts -Ph I Made I Amps Sim lex Duplex CSA UL ' M' 17139 1 115 1 l Aulo i t0 7 1 fort& a I — y Y I 3n 115 1 Non I 50-7 I 2or287 I 3ar586 Y Y 115 1 Aura i 107 2 1 Y Y :137r,39 230 1 1 Auto ! 5.8 1 1 ort & 8 I Y Y ='3't139 230 1 Non I 58 I 3or2&7 I 3or5&6 Y y '"33 200-208 1 i Nan i 5 5.5 I 188 2 8 7 I — 1 3 or 5& 5 Y N =,37 13 230 3 1 Nan { 26 i 2&4 1 3&4or5&6 Y l y i 460 3 4 Ncn 1 1.4 2 8 4 3&4 or 5&6 N N Gt - 460 3 Nor 1 14 j 2&4 1 3&4or5&6 i N N SELECTION GUIDE 1. Integral float operated 2 pole mechanical switch, no external control requisec. 2. Single piggyback variable level float switch or double piggyback variable level float switch. Refer to FMD447. 3. Mechanical altemator'M-Pais' 10.0072 or 1MO75 4. Combination Starter- Refer to FM0514. 5, See FMD712 for correct model of Electrical Alternator'E-Pak" 6. Variable level control switch 10.0225useeasacontrol activator, specify ouplex (3) or (4) float system. 7. Four (4)hole'J•Pak', junction box, for water tigtitconnection orwima-insrmpiex or 2 pump operation. 10.0002. 14014140 -- MODELS Control Selection i Listin s a. Two (2) hole'J-Pak', for Watertight connection or splice, 10-0003. Model. Model ' Volts -Ph I Mode Amps Simplex Duplex !CSAI ULI N140 N4140 115 1 1 Non 15.0 1 2or287 3ar5&6 1 N I N _140 :4140 230 1 Non 7.5 I 2or287 3or5&6 I N I N I 8E14G 3_4140' 230 1 Non 75 2or287 3ar5&6 1 N I N 3N140 BNa140t i15 Non ! 15.0 I 2or2&7 1 3or5&a I N I N CAUTION 60 ri k eb plus s,nq,e el %mci: swish included All installation of controls, protection devices and wiring should oe done Dy 30wole Seal Dums are available w,Itl oP0001 Morslure sensors. Seal Fati in [alof light avallabie In NEMA 1 or HEMA 4X conop Dams a qualified licensed electrician. All electrical and safety cocas should oe = rrpsrnustDeoperaieainuprgntoosiuor. followed including the most recent National Electric Cooe !NEC,. and me Occupationai Safety and Health Act (OSHA). Twee pnase units require a control swan to operate an external magnebr orcombmation starter. For in' or. aeon on additional Zoeller products refer ro catalog on Combination starter, FMO514: =.ggyoacxlianaDtetevefFfoat$wucnes,FM0477 ElectnralAllemalDr.FM0486;MechanscalAltema- for r MG495, Alarm PlICKage. FM0513, and Sumpt5ewage Banns, FM0487. RESERVE POWERED DESIGN For uriusual conditions a reserve safety factor is engineered into the design of every Zoeker pump. t MAIL TO: P4 aOX 16347 ''''77777 �..rFZZF)J7 LDurO: 3 49 aneR nRo ManufacturersW�/.III' SHIP 70: 3fi44 Cans Run Road C Louisville, KY 402 r 1-1961 Qu rr P11Mas S.vcE /E& JCZIM f7 [Q (502) 778.2731.1(600) 928-PUMP FAX (502) 774-3624 SECTION -7L:z/TY PrCduc: in!ormauon presented here ,efiec:s canditrons at t:me of ouo13caiion Consult factory regarding :rscreoancies or inconsistencies. MAIL TO: P.Q. 80X 16347 • Louisville, KY 40256-0347 SNIP TO: 3649 Cane Run Road • Louisville, KY 40211-1961 (502) 778-2731 • 1 f800) 928-PUMP • FAX (502) 774-3624 "OVIPARE THESE FEATURES "ire! 117. A ti cast iron. ASTM class 25 2500041 tensile strength. 'r ooet 139• All bronze class 85-5-5-5. `.".caei 14014140, all cast iron. ASTIVI class 25 250009 +ensile s:renct^ Impeller Bronze Class 85-5-5.5. Od 5iieC, nermetically sealed. ,�ma;lc reset thermal overload protected on single ;;ease. !yen -clogging vortex Impeller design. ,oat coerated submersible (NEMA 6) 2 pole mechanical swltcn. (Automatic units only) Curable cast construction. Cast switch case• motor and pump nousing. base and impeller. No sheet metal parts to rust or comae Stainless steel screws, bolts, handle, guard, and arm and seal assemn ly (Where applicable) %;I tuorcated Dearing. I�sted 3-wire neoprene cord and plug. - standard for automatic. standard for non -automatic. :;arocn ara ceramic shaft seal. " i 37" Cast Iron SeriesCIR "139" Bronze Series �= r "140"/"4140" Cast Iron Series "FLOW MATE, FOR SEPTIC TANK - LOW PRESSURE PIPE (LPP) AND ENHANCED FLOW STEP SYSTEMS µ EFFLUENT ; OR DEWATERING PUMPS R SUBMERSIBLE •rw: ssw� (LISTED 31/2" NPT DISCHARGE" "- Voriez Type Impeder '+L'77— See cao: Dace nor U' 3 CSA L5�mg5 Itcc(.111gulm- Weir %vithout F'.ild Colltt'ac'tio ns 10-1: 1 ft. Rectangillar NVOr without End Colltractio'ns Disc11:!rge Tably Discharge T<Ihle ((onlinfled) hm-111lfla.ti Cf",_� = 3.3111111 t;I+ti = CFS x -. 181 Folllllllati: CFS = 3.i30111 , tWti = c.f'S (;l'icl _ cTS s 115,8 hic;l) = CFS s 0.6-t03 GPM = CFS x + ili.8 1\1(il) = CFS x 0.6411 Head h I 0.01 0 U2 0.03 0.04 0.05 006 0.07 0.08 0.0033 00094 0.0173 00266 0.0372 00489 0.0617 0.0753 0.0249 00105 0.1294 0 1993 0.2785 03661 0.4614 05637 1.495 4 227 7.766 11.96 16.71 21 % 27.68 3382 0.0022 0.0061 0.0112 00172 0.0241 00316 0.0399 0 0d87 . 0.0581 0.09 00899 0.6726 40.35 P ` 0,10 0 t053 0.7818 4726 0.0681 TIT .(f_ 0.9089 54.52 0.0785 012 01384 1 1036 6213 0.0895 0.13 0.1561 1.168 70.05 0.1009 0 14 0 t 7,14 1 305 7829 0 1127 0.15 G.1935 1,447 86.82 0.1250 0 16 0 2131 1 594 9565 0 1377 0.17 0.2334 1.746 104.8 0.1509 018 02543 1 902 11.1 1 0 1614 0.19 0.2758 2.063 1238 0 1782 020 0 2978 2 228 133 7 0 1925 0.21 0.3205 2.397 143 8 02071 022 03436 2 571 1542 0 2221 0.23 0.3673 2,748 164.0 0 2374 024 0 3915 2 929 175 7 U2530 0.25 0,4163 3.114 186.8 02690 026 0,1415 3301 198 t 02853 0,27 0.4672 3.495 209-7 U.3019 0.28 0493.1 3 691 221 •1 03189 0,29 0.5200 3 890 2334 0.3361 0 31) 05,112 4 093 2456 U 3536 0,31 0,5748 4.300 258.0 03715 032 0 6028 4 510 2705 0 3896 0.33 0,6313 4.723 283.3 0.4080 034 06602 4 939 2963 0 1267 0.35 0.8895 5.158 309.5 0.4456 0.36 0 7193 5 38 1 3228 04649 0.37 0.7495 5 607 336.4 0.4844 0,38 0 78UU 5 836 350 1 050111 0-39 0 B110 6 067 364.0 0-5242 040 0 B424 6 302 Vs 1 05,145 041 0,8742 6.540 392.3 0.5650 0 42 1) 90G-1 6 I81 4116 8 05858 8.43 09390 7.024 421.4 06068 0.61 R91f9 1211 •LJG2 06781 0.45 1 005 7 520 451 1 (1 6497 4) Ili 1 0 W 1112 lt,fiA flfillf) 047 1 073 8.021 4816 06935 0 •HI 'i 8 :18.1 T (1 II IJ.'il 0 45 2 8.545 5126 0.7382 11 50 1 1 i f j H HI III : ;'H 4 11 i til)9 0,51 1.213 9.073 544.3 0.7839 1.01 3.390 25.29 1W 2.185 1.51 6.179 46.22 2773 3.993 052 1.249 9 341 5604 08070 1.02 3.430 2566 1540 2.217 1.52 6 240 4668 2801 4 033 0.53 1.285 9,612 576.6 0.8304 1.03 3.481 26.04 1562 2,250 1.53 6.302 47.15 2828 4,073 054 1 321 9 885 5930 08540 1.04 3 532 25.42 1585 2 283 154 6 364 4761 2856 4.113 0.55 1.358 10.16 609.6 0.8779 1,05 3.583 26.80 1608 2.316 1.55 6-426 48.07 2884 4.153 0.56 1.395 1044 6253 09019 1.06 3 634 27,19 1631 2 349 156 6 488 4854 29 t2 4 193 0,57 1.433 10.72 643.1 0.9262 1.07 3.686 27.57 1654 2.382 1.57 6 551 49.01 2940 4.234 058 1 471 1100 669 1 09506 1.08 3.737 27 96 1677 2 416 1 58 6 613 4948 2968 4 274 0.59 1.509 11.29 677.3 0.9753 1.09 3.790 28,35 1701 2.449 1.59 6.676 49.95 2996 4.315 0.60 1 548 1158 694 6 1 000 1 10 3 842 28.74 t 724 2 483 160 6 739 50.42 3025 4 356 0.61 1.586 11.87 712.0 1.025 1.11 3.894 29.13 1740 2.517 1-61 6,803 50.89 3053 4.397 062 1 626 12.16 7296 1.051 1,12 3-947 2953 1771 2 551 1 52 6 866 51.37 3082 4 438 0.63 t.665 12.46 747.3 1.076 1.13 4.900 29.92 1795 2-585 1.63 6.930 51.04 3110 4.479 064 1.705 12.75 7652 1 102 1.14 4.053 3032 1819 2 620 164 6 994 5232 3139 4.520 0.65 1.745 13.05 783.2 1.128 1.15 4,107 30.72 1843 2.654 1.65 7.058 52.80 3168 4.561 066 1.786 1336 801 3 1.154 1 16 4 160 31.12 1867 2 689 166 7 122 5328 3198 4.603 OV 1.826 13.65 019.6 1.180 1.17 4.214 31.53 1891 2.724 t.67 7187 53.76 3225 4-645 0 68 1 867 1397 8380 1. 207 1.1 B 4 260 3193 1916 2 759 1 68 7 251 5425 3254 4 686 0,69 1909 14.28 056.6 1.234 1.19 4.323 32.34 1940 2.794 1.69 7.316 54.73 3283 4 728 070 1 950 14-59 875.3 1 260 120 4 371 32.75 1965 2 829 1 70 7 381 5522 3313 4 770 0.71 1.992 14.90 894.1 1.28E 1.21 4.432 33.16 1989 2,865 171 7446 55.71 3342 4.813 0 72 2 03-1 1522 913 1 1.315 122 4.487 33.57 2014 2 900 1 72 7 512 56 19 3371 4 055 0.73 2.077 1554 932.1 1,342 1.23 4.543 33.98 2039 2.936 1.73 7.577 56-69 3401 4997 0 i•1 2 121) 15 B6 951.4 1.370 j 1.24 4 598 34 40 13064 2 972 1 14 7 6.13 57.18 3-130 •1 9,10 075 2-163 16.18 970.7 1.398 1.25 4.654 34.82 2009 30118 1,75 7 709 57 67 3460 4 982 0 76 2206 1651 9902 1 426 126 4 710 3523 2114 30,111 1 76 7 775 58 17 3490 5 025 0.77 2.250 1683 1010 1.454 I 1.27 4.166 35.65 2139 3.080 1 77 7 842 58.66 3519 5.068 078 2 294 17 16 1030 1 •183 128 4 822 36-OB 2154 3 117 1 78 7 9U8 59 16 3549 5 111 0.79 2.338 17.49 10,19 1.511 1.29 4,879 36.50 2190 3 153 1.79 7 975 5966 3579 5-154 080 2 383 1783 1069 1 510 130 4 936 3692 2215 3 190 1 80 8 0.12 60 16 3609 5 t97 0.81 2.428 10.16 1089 1.569 1.31 4 993 37.35 2241 3-227 181 8 109 60.66 3639 5 241 082 2 473 1850 1110 t 598 1.32 5 050 37.78 2267 3 264 182 8 176 61 17 3669 5 284 0.83 2.518 19.84 1130 1.627 1.33 5.108 38.21 2292 3.301 183 8.244 61.67 3700 5 328 084 2 564 19 18 1151 1 657 134 5 165 3864 2318 3.338 1 8.1 8 311 62 18 3730 5 372 0.85 2.610 19.52 1171 1.687 1.35 5.223 3908 2344 3 376 1.85 8 379 6268 3761 5 415 086 2.656 1987 1192 1,716 136 5 281 39.51 2370 3 413 1 86 8 44 7 63 19 3791 5 459 0.87 2.702 20,22 1213 1.746 1.37 5.340 39,95 2397 3 451 1,87 8 515 6370 3022 5 504 068 2 749 2056 1234 1 777 138 5 398 4039 2423 3 489 1 88 8 584 6422 3852 5 54B 0.89 2.796 20.92 1255 1.BO7 1.39 5 457 40,82 2449 3,527 1.89 8 652 64.73 3883 5 592 090 2 8.13 21 27 1276 1 838 140 5 516 4127 2476 3 565 1 90 8 121 6524 3914 5 636 0.91 2.891 21.63 1297 1.868 1.4 I 5.575 41 71 2502 3.603 1 91 8 790 65 76 3945 5 681 092 2 939 21 96 1319 1 899 1 42 5 635 42.15 2529 3 G12 t 92 8 859 6628 3976 5 726 0.93 2 987 22.34 1340 1.930 1 43 5.694 4260 2556 3 680 1 93 8 929 6679 4007 5 771 Q 94 3 035 :!7 11) 1362 1 961 1 44 51,94 4305 2583 t mg 9 1 94 8 998 61 3l lots 5 815 0.95 3.083 23.07 1384 1.993 1 45 5 814 4350 2609 3 158 1 95 9068 6784 4070 5 860 1196 '1 IV :,A 4it 1406 2 U7.1 ! 46 5 875 43 9!i ;'ti,lli .I i9i 1 96 9 1:18 fi,i i11i .1101 *16 0.91 3-181 23.80 1428 2-056 1 17 5.935 44 40 2661 1636 1 91 9 708 6988 41 J2 .11 R'kf J :)31 2.1 11 I V)0 ;' REIN t 48 S 99l'+ •1.1 B5 :'1i91 J 8i.`+ f '13 9 "A 64.11 11IM � S '1% 0 99 3280 24 54 1472 2.120 1 49 6 051 I!i 31 'll 1 H :191.1 19'1 1 !]U ! -Sa!! ?4 ?f l I•k94 " +'�' 1 �•11 I: i it+ • ■ G !i-7: `l{1. Ilt>Irf1 i4t it IliSC ft:lr r't'aliir 8_j: r)[1' 1' E110W t WCi1• 1)i;L-IUt1-14C F:t111c (t'r�rrlilrrri'rll Fc,rnullas; CFS z 1,;fItII1' ' t;P5 = t,FS x 7.181 L,,,I,I,II,Iti t.l ti '',11iI1I' ' t.l'ti t'lti � r.;l I - (:F", X I W14 ,1K;I3 t,15 x 0.010� c:l'11 t 11•`4S :.\It;I1 t+:% tIt,II,; I II U.0000 O.0002 0.0112 0.0000. 0.51 0.4644 3.474 208.4 0.3001 000U1 011011 0.0635 0.0001 052 0.4875 3fi47 2i68 03151 0.0004 ..0029 0.1749 0.0003 0.53 0.5112 ' 3.825 229.4 0.3304 ; N 0 0008 0 0060 0 3590 00005 0 54 0 5357 4 006 2404 0.3462 0.05 0.0014 0.0105 0.6272 0.0009 0.55 0,5609 4.196 251.7 0.3625 0 06 O.OU22 00 t 65 0 9894 00014 056 05867 4 3B9 2633 03792 0.07 0.0032 0.0242 1.455 0.0021 0.57 0.6132 4.588 275.2 0.3963 008 00045 00339 2031 00029 058 06405 4 791 2875 04139 0.09 0.0061 0.0454 2.726 0.0039 0.59 0.9685 5.001 300.0 0.4320 010 0-0079 0.0591 3 548 0.0051 0 60 0.6971 5 215 3129 04506 0.11 0.0100 0.0751 4.503 0.0065 0.61 0.7265 5A35 326.1 0.4696 012 0.0125 00933 5 597 00081 062 0.7567 5 661 339.6 0 4891 0.13 0.0152 0.1140 6.837 0.0098 0.63 0.7876 5.892 353.5 0.5090 11,14 00183 01372 8.228 O,Utf8 0,64 08192 6t28 3677 0.5294 0.15 0.0218 0.1630 9.777 0.0141 ' 0.65 0.8516 6.371 ' 382.2 0.5504 0 16 00256 0 1915 11 49 0 0165 066 08847 6 618 397.1 05718 0.17 0.0290 0.2229 13.37 0.0193 0,67 0.9186 6.872 412.3 0.5937 0.18 00344 02571 15.42 00222 068 09533 7 131 427 8 06161 0.19 0.0393 0.2943 17.66 0.0254 0.69 0.9887 7.396 443.7 0.6390 0.20 0.0447 03346 -20.07 00289 0.70 1 025 7 667 4600 0.6624 0.21 0.0505 0.3780 22.67 0.0327 0.71 1.062 - 7.944:'. 476.6 0.6863 l 11 022 3` 0 0588 0 4246 2547 0 0367 072 1.100 8-227 493-5 0.7107 4 0.23 0.0634 0.4745 28.47 0.0410 0.73 I A38 8.518. 510.9 0.7357 0.25 13.0781 0.5845 35.06 0.0505 0.75 1.218 9.111 546.6 0.7871 0.26 00862 0,6447 3867 0.0557 0.76 1-259 9 417 5650 08136 0.27 0.0947 0.7084 42.50 0.0612 0.77 1.301 9.730 553.7 0.8406 0.28 0 1031 0 7759 4655 0.0670 078 1.343 1005 6029 08682 0.29 0.1132 0.8470 50.81 0.0732 0.79 1.387 10.37, 622.4 0,8963 030 0 1232 09219 5531 00796 080 1 431 10 71 6.12 3 09249 0.31 0.1338 1.001 60.03 0-0865 0.81 1.476: 11.04 662.6 0.9541 032 0-1448 1.083 64 99 00936 082 1 522 11.39 683 2 0.9838 0.33 0.1564 1.170 70.19 0.1011 0.83 1.569 11.74 704-2 1.014 034 0,1685 1 261 7563 0 1089 08,1 1 517 12.09 7256 1.045 0.35 0.1012 1.355 81.31 OAM 0.85 1.665 12.48 747.4 1.076 036 0 1944 1 454 8725 0 1256 0.86 1 715 1283 7696 1.108 0.37 0.2082 1.557 93.43 0.1345 0.87 1.765. 13.20 792.1 1.141 0.3B 02225 1.665 9987 0 1438 088 1 B t6 1359 815 1 1 174 0.39 0.2375 1.776 106.6 0.1535 0.89 1.868 13.98 838.4 1.207 0 40 0 2530 1 893 1135 0.1635 090 1 921 14.37 8622 t 2.12 0.41 0.2691 2.013 120.8 0.1739 0.91 1.975 14.77 886.3 1.276 0.12 U 2858 2 138 1283 0 18•17 (192 2030 t5 18 9109 1 312 0.43 0.3031 2.268 136.0 0.1959 0.93 2.085 15.60 935.8 1.348 044 0 32 f0 2.102 144 1 02015 0911 2 1.12 16 02 91512 1 38.1 0.45 0.3396 2.541 152.4 0.2195 0.95 2.199 16,45 987.0 1.421 046 03588 2 684 161 0 0 2319 1) Ub 2 251 16 89 111 I J 1 4511 0.47 0.3786 2.832 169.9 0.2447 0.97 2.317 17.33 1040 1.497 0.18 03991 2 985 119 1 112519 098 2311 11 18 11161 15:16 0,49 0.4202 3.143 188.6 0.2716 0.99 2.A38 18.24 1094 1.576 0511 11-1.119 .1 JUG I 1418'I 111?1L6 t 011 : 'iU11 In it) II:": 1611; l.01 2.563 :' 19.17 1150 1.655 1.51 7.005 52.40 3144 4,527 1 02 2 627 1965 1179 1 698 152 7 121 5127 3196 4 602 1.03 2.692 20.14 1208 1.740 1.53 1.239 54.15 3249 4.678 i O.1 2 758 2063 1238 1 7B2 154 7 35B 55 0.1 3302 4 155 1.05 2.824 21.13 1268 1.825 1.55 7.478 55.94 3356 4.033 106 2 892 21 54 1298 1 869 1 56 7 599 5685 3-110 4 911 1.07 2.961 22.15 1329 1.914 1.57 7.721 57.76 3465 4.990 1 118 3 ON 2261 1360 1 959 1 58 7 815 5869 3521 5 070 1.09 3.101 ' ': 23.20 1392 2.004 159 7.970 59.62 3577 5.151 t 10 3 173 23 73 142:1 2050 t 60 8 095 6056 3633 5 232 1.11 3.245 24.28 1456 2.097 1.61 8-223 61.51 3690 5.314 112 3319 2483 1.109 21-15 t62 8351 6247 3748 5397 I 1.13 3.393 25.39 1523 2.193 1.63 8.480 63.44 3806 5.481 1 14 3 469 2595 1557 2 242 1 64 8 611 64 42 3865 5 565 1.15 3.546 26.52 1591 2.291 1.65 8.743 65.40 3924 5.650 1 16 3 623 27 10 1626 2 342 156 8 816 66.11) 3983 5 736 1.17 3.702 27.69 1661 2.392 1.67 9.010 67.40 4044 5.823 118 3 781 28.29 1697 2 444 168 9 1.16 6842 4105 5 911 1.19 3.062 28.89 1733 2.496 169 9.282 69.44 4166 5.999 120 3 944 2950 1710 2 549 1 70 9 420 70,17 .1228 6 088 1.21 4.026 30.12 1807 2.602 1.71 9.559 71.51 4290 6.178 1 22 4 110 30 75 18.15 2 656 172 9 700 7256 4353 6 269 1.23 4.195 31.38 1883 2.711 1.73 9.841 73.62 4417 6.360 1 1 2.1 4 280 3202 1921 2 766 1 7,1 9 984 14 69 4481 6 453 1.25 4.367 32.67 1960 2.823 1.75 1013 75.77 4546 6.546 126 4-455 3333 1999 2 879 1 76 10 27 76 86 .161 1 6 641) 1.27 4.544 33.99 2039 2.937 1.77 10.42 77.95 4677 6.735 128 4 634 3467 2080 2 995 1 18 1057 7906 4743 6 83U 1.29 4.725 35.35 2121 3 054 1.79 1072 80.17 4810 6.926 130 4 817 3604 2162 3 113 180 10 87 81 30 4817 7 624 1.31 4.910 36.73 2204 3.174 191 11.02 82.43 4945 7.121 1 32 5 005 37,44 2245 3 235 182 11 17 8358 5i114 1220 1.33 5.100 38.15 2289 3.296 1.83 11-33 84.73 5083 7.320 134 5 196 3887 2332 3 358 184 1148 85 89 5153 7,120 1.35 5.294 39.60 2376 3.421 1.85 11.64 87.06 5223 7.521 136 5.392 40 3-1 2420 3.485 1 06 1180 88 24 529-1 7 62.1 1.37 5.492 41.09 2465 3.550 1-87 11.95 89.43 5365 7.726 138 5 593 4184 2510 3 615 1 88 12 12 9063 5437 7 B30 1.39 5.695 42.60 2556 3.681 t.09 12.28 9184 5510 7.935 1 .10 5 79B 4337 2602 3 7.17 1 91) 12 14 9305 5583 8 01,1 1.41 5.902 44.15 2649 3.814 1 91 12 60 94.29 5657 8.146 1 .12 6O(17 -1.194 696 3873? 1 92 W 11 .)553 `.,1;11 8;1,3 1.43 6113 45.73 2744 3.951 1 93 12.94 96.78 5806 8 361 1 .1.1 6?21 •16 S-1 IiT 4 0?1 1 11.1 €.1 11 9H 11.1 5887 8 J At 1.45 6.329 41.35 2841 4.091 1 95 13.27 99.31 5958 8 579 1 41i G -1:111 •IB I i ;189111 4 I1::, I A. 13 t`. 111111; GI114 8 6•10 1.47 6.550 49.00 2940 4 233 1 97 1362 lot 9 6112 8 801 1•I8 1;66") 19111 ;"Plll 1.011; 1!M II -"I lipt? hi'Ill 8'11I 1.49 6.775 50.68 3041 4 319 1 99 13 97 Ml 5 6268 9 026 1 1.1r Ii Iit11I '.t '0 imr' I I'1 • ' 111 + I I I rml S I. 1 t , '+ , 1'. J,-; Z- i -C-YZ J-1-1. jc_--/2s I if v 054-! /-Jo Li WOJEK & ASSOCIATES PO Box 8847 • Greensboro, NC 27419-0847 May 3, 2002 Ms. Shannon Mohr Thornburg Environmental Engineer Non -Discharge Permitting Unit 1617 Mail Service Center Raleigh, NC 27699-1617 SUBJECT: Application No. WQ 000 7103 Sound of the Sea Carteret County Response to State Comments Dear Ms. Thornburg, A copy of your February 25, 2002 comment letter was received from Mr. Ed Beck, Wilmington Regional office, on April 22, 2002. Also, during an April 22, 2002 meeting at Wilmington Regional Office, Mr. Ed Beck provided additional verbal comments, in addition to the february 25, 2002 comment letter, and requested a written response. The first part of this letter responds to the February 25, 2002 comment letter and the second part responds to Mr. Ed Beck's verbal comments. FEBRUARY 25, 2002 COMMENT LETTER We believe that the flow metering equipment is inaccurate and unreliable, and generates incorrect flow data. The primary flow element is a v-notch weir machined from 1/4-inch stainless steel plate. This weir has never been calibrated, and calibration values have not been entered into the flow meter to correct the factory entered formula. The existing ultrasonic sensor and circular chart indicating totalizing recorder appear to be inaccurate and unreliable. Three field checks made during a single day indicated flow through the weir at 6 to 8 gpm when the flow meter indicate 10 to 11 gpm. With the weir showing 8 gpm and the indicat- ing recorder showing 10 gpm, the error is 2 gpm greater than the actual flow of 8 gpm, or 25 percent. Page 1 of 5 This on -site field testing was done with the assistance of the person who normally conducts annual flow meter calibrations. The existing ultrasonic sensor is easily knocked out of calibration, and its sensing function contaminat- ed by condensation and spider webs. It is reported the indicating circular chart record does not hold calibration over time. We will install a new sensor and a new indicating recording totalizing flow meter. We will calibrate the v-notch weir, and use the calibration data to correct the factory entered formula. Reliable and accurate flow data are essential to determine if flow equalization is needed, and how much would be needed. It is technically unsound to attempt to design flow equalization without reliable flow data and hydrographs. These are concerns expressed by Mr Ed Beck. It is our understanding that these concerns were resolved during conversations between Mr. Ed Beck, and Mr. Mike Mandt. Mr. Mike Mandt is the developer and patent holder for the SBR process to be installed/operated at Sound of the Sea. Off line aerobic biomass is usually maintained in a ready to use condition by periodically aerating the aeration chamber. Aerobic biomass that has not been "fed" has a respiration oxygen requirement of less than 0.1 Mg OZ per hour per gram of biomass. The concentration of dissolved oxygen necessary to support this SOUR (sludge oxygen uptake rate) is easily furnished by aerating for 10 to 15 minutes once every 8 to 12 hours in winter, and once every 6 to 8 hours in the heat of summer. Aerobic biomass recovery, after extended periods off line, is very rapid. Soluble carbon MOD) is removed from sanitary waste solution in a normally operating system in less than about one (1) minute. Initial soluble carbon removal, upon "re -activating" aerobic biomass, will occur within less than 15 to 20 minutes. After the initial 15 to 20 minutes, "re -activated" biomass will have the charac- teristics of "normal" aerobic biomass. The existing facilities consist of two (2) parallel 20,000 gpd package plants totaling 40,000 gpd capacity. During six (6) to seven (7) consecutive months per year, maximum sewage flow is less than 20,000 gpd. During these tunes, only one of two (2) package plants will be on line. The off line unit will be either emptied for maintenance and repair, or will be in standby service. In standby service, a package plant would not receive sewage (food), but would e programmed to be aerated about 10 to 20 minutes out of every 6 to 8 hours. The on line package plant will receive all sewage flow. During the five (5) to six (6) months of the year of maximum sewage flow greater than 20,000 gpd, both package plants would be on line in service. Raw sewage flow would be equally split between both plants using a flow splitter box. the total combined capacity would be 40,000 gpd. Page 2 of 5 The new facilities will consist of one existing 20,000 gpd package plant and the new 40,000 gpd SBR. There is no technical process reason to split flow between the units. The 20,000 gpd unit will be used during: a) off season consecutive months when maximum raw sewage flow is less than 10,000 to 12,000 gpd; b) off season consecutive months when maintenance/repair to the SBR is required, and/or; c) unforeseen emergencies. this is exactly the same operations as currently occur with the existing facilities. During periods when the 40,000 gpd SBR is operational, the 20,000 gpd package plant will be in the same standby service as is currently being done. The existing dual package plants provides a minimum 20,000 gpd capacity, and a maximum of 40,000 gpd capacity. the new facilities will provide a minimum of 20,000 gpd capacity, and a maximum of 40,000 gpd capacity. This item has been resolved with Mr. -Ed Beck. The clarifier in existing plant #2 will be used as a surge tank. A new flow splitter box will be installed, and a dual float controlled pumps will be installed. The new pumps will discharge to the new splitter box. About 28 GPM will discharge to the existing tertiary filters, with flow in excess of 28 GPM recycled back to the surge tank. The appropriate draw- ings have been revised. VERBAL COMMENTS FROM MR. ED BECK Attached are five (5) sets of revised Sheet 4 of 9 and Sheet 5 of 9 showing the following Revision 3: * Effluent from SBR discharging into plant #2 clarifier. * Two (2) pumps in plant #2 clarifier discharging into a new splitter box. Only one pump will run at a time. Pumps will alternate cycles of operation. * Connection from new sputter box to existing 6" PVC inlet to existing tertiary filters. * 6" PVC overflow. • A manually adjustable float switch high water alarm will be installed. • Five (5) copies of engineering calculations. This information was presented to Mr. Ed Beck at a meeting in Wilmington on April 22, 2002. SBR DESCRIPTION The existing facilities consist of two (2) parallel 20;000 gpd package plants. The combined total is 40,000 gpd capacity. During in -season, both package plants are operational, with raw sewage flow equally split between both plants. During off-season, one package plant may either be emptied for maintenance/repair, or placed in standby service and not receiving waste (not being fed). All waste flow would be directed to the Page 3 of 5 operational package plant_ The standby package plant would be aerated periodically to maintain viable biomass. The renovated facilities will consist of one 20,000 gpd package plant, and one 40,000 gpd SBR. During in -season, all waste flow would be pumped to the SBR, and the package plant would be in standby. During off-season, when performing maintenance on the SBR, all waste flow would be directed to the package plant. There is no need, nor is it recommended that waste flow be split between the package plant and the SBR. Groundwater NO3 limits are being violated. The SBR is guaranteed to produce an effluent containing less than 5 mg/L NO3. During in -season there is no reasonable combination of less SBR capacity and package plant capacity that will produce less than 5 mg/L NO3. Therefore, 40,000 gpd of SBR capacity is required during in -season periods. The existing facilities have a total capacity of 40,000 gpd, and a single unit capacity of 20,000 gpd. The new renovated facilities will have a total capacity of 40,000 gpd, and a minimum single unit capacity of 20,000 gpd. The SBR will allow meeting groundwater NO3 limits, at a minimum cost. the SBR is proven reliable technology, and produces an effluent equal to and better than "standard" extended aeration package plants. EXISTING ISAM FACILITIES Attached are data sheets and respective contact information for four (4) existing ISAM facilities. This is briefly summarized as follows: Volusla County, FL Mr. Bill Gilly (904) 943-4905 Chapman`s Ice Cream Markdale, Ontario Jerry (519) 986-3131, ext. 520 JB Sims Power Plant (Domestic Waste) grand Haven, MI Chuck (616) 842-6355 John Wood School Merrillville, IN Mark (219) 650-5309 Page 4 of 5 Cordavalle, CA Mr. Jamie Matthews (714) 843-5734 (no write up yet) DUAL RAW SEWAGE The drawings show that the raw sewage force main is to be repiped. New piping allows for raw sewage to be pumped to the new SBR, or to the existing package plant # 1. The existing force main gate valves and check valves are inside the raw sewage lift station and are impossible to use, service and maintain. These existing gate valves and check valves will be removed, and new piping and valves will be installed in a new valve pit at grade. GENERATOR The existing generator has a capacity of 200 amps. The SBR normal load is 29.5 amps, and maximum load is 59 amps. Tertiary filter equalization pumps is 4 amps, and the existing rotary dosing pumps is 2 amps. Total normal load is 70 amps, and start-up load is about 140 amps. The existing generator is adequate. DUAL BLOWERS This is a maintenance item that will be done during renovations. The existing facilities have dual blowers. One blower has failed completely. This blower will be replaced, providing dual blower capability. . \ ly yours, 4 � �f Donald M. Wojek Page 5 of 5