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HomeMy WebLinkAboutSP 144C; SDG&E Wastewater Facility; Specific Plan (SP) (2)MEMORANDUM November 18, 1976 TO: CITY MANAGER : ' . FROM: PLANNING DIRECTOR SUBJECT: Environmental Requirements for Encina Water Treatment Facilities. We have requested, and received, additional information from San Diego Gas & Electric Company, concerninq the install- ation of water treatment facilities at the Encina Power Plant. I believe that we now have enouqh information available to make a determination on the environmental effects of the pro- ject. I am awaiting processing of these environmental documents pending your recommendation. Your direction at this point would be appreciated. A . Agatep PLANNING DIRECTOR DAA/DHW/AR PiECEIVED NOV 30-1976 CITY OF CARLSBAD Planning Department SAN DIEGO GAS & ELECTRIC COMPANY P.O. BOX 1831 SAN DIEGO. CALIFORNIA 92112 (714) 232-4252 September 8, 1976 FILE NO. MUC 010 RECEIVED Mr. Don Agatep Planning Director CFP f)QuyCity of Carlsbad 1200 Elm Avenue Carlsbad, CA 92008 CITY OF CARLSBAD Planning DepartmentDear Don: This letter is in response to your request for ad- ditional information concerning the Encina Power Plant Water Treatment Facilities. Question 1; What is the volume of water being discharged? Answer ; The amount of water discharged into the ponds will vary from day to day due to the fact that extended power plant operations require varying amounts of fresh water. Our NPDES permit #CA 0001350 application to the California Regional Water Quality Control Board for Encina stipulates the following: 1. Extended (metal cleaning) discharge waters will not exceed 21,000 gpd. 2. Low volume discharge water will not exceed 135,000 gpd. It should be noted that boiler blowdown, which is not to exceed 90,000 gpd, has not been included in the above quantities. We will attempt to recover and reuse as much of this water as possible. Question 2 ; What is fresh water used for in the thermal power plant process? Answer : Fresh water is used for: 1. Boiler feedwater. This prepared water replenishes boiler blowdown and supplies steam atomization (for stack No control) .X 2. Circulating water pump lubrication. 3. General plant cleaning processes. AN INVESTOR-OWNED CORPORATION DBEGO GAS 81 ELECTRIC COiVilPAWY Mr. Don Agatep September 8, 1976 Page 2 -4-. - Employee watea needa« Question 3 ; Why can't all discharge water be re- used in the power plant? Answer ; San Diego Gas & Electric Company will attempt to recycle the 90,000 gpd of boiler blowdown water because the quality is far better than City water. The re- maining low volume and extended water discharges will be of harder quality and thus not suitable for the above use. F. M. Dudley Supervisor Land Planning FMD : Ima Extension:1885 W. ff " ' SAN DIEGO GAS & ELECTRIC COMPANY P.O.BOX1831 SAN DIEGO. CALIFORNIA 92112 (714) 232-4252 FILE NO. CAB 500 January 26, 1977 JO U10 City of Carlsbad Planning Department ,,ci i « MHp 1200 Elm Avenue UWLtn** Carlsbad, California 92008 Attention: Bud Plender Acting Planning Director Gentlemen: We are hereby requesting through the attached "Application for Adoption of an Amended Specific Plan" and attached "Exhibit A" dated January 25, 1977, an amendment to our original Encina Specific Plan (SPlW-). The purpose of our request is to provide for addition of certain necessary facil- ities at SDG&E's Encina Power Plant property. The additional facilities are indicated as shaded areas on attached "Exhibit A" and include the following: 1. Water treatment facilities as approved by City of Carlsbad Engineering Department, File No. PE 2.8.18 and in accordance with the City's Declaration of Negative Environmental Effect" (E.I.S. Log No. 337). 2. Future maintenance building for consolidating certain shops and storage activities now ocurring at various places around the power plant property. We also request that additional language be provided in the text of the plan as follows: "The Planning Department may approve certain modifications not otherwise shown on this Specific Plan, as revised, without further amendment to this plan, if said modification is in keeping with the intent and concept of the plan." This language is requested so that we may regain the flexibility formerly provided for in the "Public Utility" zoning ordinance which allowed us to make minor modifications to power plant facilities without the necessity of a Specific Plan Amendment. AN INVESTOR-OWNED CORPORATION SAN DIEGO GAS & ELECTRIC COMPANY Bud Plender -2-January 26, 1977 Due to federal environmental regulations which mandate that we install the water treatment facilities by July 1, 1977> your immediate attention to this matter will be appreciated. We submit this application in anticipation that it will be considered during the March 9* 1977 Planning Commission regular meeting. If you have further questions on our request please call me at 232-4252, extension 1885. Sincerely, F. M. Dudley Land Planning Supervisor FMD:dr JOHN R. PHILP, M.D., M.P.H. DIRECTOR OF PUBLIC HEALTI DEPARTMENT OF PUBLIC HEALTH 16OO PACIFIC HIGHWAY SAN DIEGO. CA 92IOI Telephone 236-2243 February 11, 1977 City of Carlsbad 1200 Elm Avenue Carlsbad, California 92008 Attention Bud Plender Assistant Planning Director Re: Specific Plan - Case No. SP-144(D) Encina Power Plant Gentlemen: This is to acknowledge your request for comments regarding amendment of specific plan to allow water treatment ponds and a future maintenance building at the Encina Power Plant. The proposed water treatment ponds are likely to serve as mosquito breeding sources, unless the following conditions are met by the applicant: 1. Confine standing water impoundment to as small an area as possible. 2. Water pond(s) to be constructed and maintained at a minimum depth of four (4) feet. 3. Banks of water pond,(s) to be constructed with a two-to-one (2:1) slope, or steeper, to minimize dense aquatic growth such as cattails or tules. 4. Maintain a removal program of dense aquatic vegetation, such as cattails, bulrush, tule, pondweed, etc. Serving all of the incorporated and unincorporated areas of San Diego County February 11, 1977 - 2 - City of Carlsbad Re: Encina Power Plant 5. Maintain a mosquito fish (Gambusia affinis) population, as necessary. 6. Maintain routine (weekly) inspections of water im- poundments to detect mosquito breeding. 7. Abate any mosquito breeding, as it is detected. We recommend the above conditions as mitigating measures for the potential mosquito breeding hazards that may result from such an operation. Water ponds which are under continuous recirculation present minimal mosquito breeding nuisances. Should you need further information or assistance with this matter, please feel free to contact Mr. Moise Mizrahi, at 236-4841. Very truly yours, fOHN R. PHILP, M.D. Director of Public Health JRP:MM:mvn cc: Mizrahi Shoemake [ STATE OF CALIFORNIA EDMUND G. BROWN JR., Governor CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD •SAN DIEGO REGION 6154 MISSION GORGE ROAD, SUITE 205 SAN DIEGO, CAUFORNIA 92120 TELEPHONE: (7)4) 286-5114 FEBRUARY 9, 1977 CITY OF CARLSBAD 1200 ELM AVENUE CARLSBAD, CALIFORNIA 92088 ATTENTION: PLANNING DEPARTMENT GENTLEMEN: SUBJECT: CASE No. SP-144(D) WE HAVE REVIEWED THE ABOVE SUBJECT MATERIAL AND HAVE NO COMMENT AT THIS TIME. YOURS VERyr>RULY, /w&l FOR:'"/LADIN H. DELANEY SUPERVISING ENGINEER FEB 1 0 1977 CTTY 06 CARLSBAD PI -i-io nopartment STATE OF CALIFORNIA EDMUND G. BROWN JR., Governor CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD SAN DIEGO REGION 6154 MISSION GORGE ROAD, SUITE 205 SAN DIEGO, CALIFORNIA 92120 TELEPHONE: (714) 286-5114 FEBRUARY 23, 1977 CITY OF CARLSBAD 1200 ELM AVENUE CARLSBAD, CALIFORNIA 92088 ATTENTION: PLANNING DEPARTMENT GENTLEMEN: SUBJECT: CASE No- SP-lMf (D) WE HAVE REVIEWED THE ABOVE SUBJECT MATERIAL AND HAVE! NO COMMENT AT THIS TIME. YOURS VERY TRULY, FOR: LAD IN H. DELANEY SUPERVISING ENGINEER RECEIVED FEE 2 5 1977 CITY OF CARLSBAD Planning Department I NFORHATI OH REOUE ST R)RH T0: FROM: •RE: CARLSBAD PLANNING DEPARTMENT CASE NO. Attached is a copy of the location map arid information sheet on subject case. This item will be reviewed by Carlsbad Development Review Committee on _ I ' [OJl^J^L. _____ (/ 1 Jj7 / Therefore, if you have comments or conditions ^ that should be considered, please complete this comment request and return by A'b '/<J. J977 . For further information, please contact. the Planning Department at 729-1181, .__,———.-- ____ . _____ _ . __ ______ , ____ , _______ r.^T_fBud Plender, Assistant Planning Director ClTV' « '-^ / ^ / "/" (attach additional sheet if necessary) if>*jr Case No.5P-H4fcQPate Rec'd: 1/2/7/77' DCC Date: 3/1 h -7 PC Date 3/9/77f-^-nt , -— y / ' — ' / ~^~ 'Description of Request: AM^1K)P S P£g.| P/<r_"To Address or Location of Request: Applicant: ^ Engr. or Arch. Grief Legal:<SF"F 4. f4 A< ..... J——»_i _IK^-: '***•*• J>L "''•ssessor BOOK: General Plan Land Use Description: Existing Zone: P-U Acres: \^/t^ No. of Lots: Parcel: ^Proposed Zone: School District: M/^- V'atcr Sanitation District: DU/Acre ac;f Pormit. Area: INFORMATION REQUEST FORM DATE g:B 3 IQ77 T0: • . • t -y-f/i o FROM: CARLSBAD PLANNING DEPARTMENT •1^ • CASH HO. ^P- 1^H4 ( D) Attached Is a copy of the "location map and Information sheet on subject case. This item will be reviewed by Carlsbad Development Review Committee on )OnjQL/L/C/l ...... ...1; I. H7 j « Therefore, if you have comments or conditions %. that should be considered, please complete this comment request and return fq . 1977 . For further "information, please contact the Planning Department at 729-1181, Ext. 25. "•••.' . " Bud Plender, Assistant Planning Director .. ' ' COMMENTS /</O Co*i Ke>j7T -/)t*j - -3. ~/'*-'* 1 Cr/T/Q (attach additional sheet if necessary) tmn Case No^P-frHfo^Pate Rec'd: 1/2-7/77 DCC Date: .3/1/77 PC Date 3, 'Description of Request: AM^tOD SPE£|P(gl PLAO T"Q ALL<O/Q' /j j -Address or Location of Request: Xl.-g" ^£)OT^ OF Applicant: jS p<^. ^ /=- Engr. or Arch. E/ief Legal: £ P 4/4 s'sessor BOOK: General Plan Land Existing Zone: Acres: se Description: P-_Q ___ : Page:__^/a Parcel: School District: No. of Lots: M//\ Proposed Zone: 24. Hi DU/Acre Water Sanitation District Within Coast Plan Area:Coast Permit Area: FORM <u T0: FROM: CARLSBAD PLANNING DEPARTMENT •RE: . CASE HO. 5 P~ I ^-^~ Lb') Attached is a copy of the location map and information sheet on subject case. This item will be reviewed by Carlsbad Development Review Committee on (i 1 0^1. CtA, I i ( H~J I Therefore, if you have comments or conditions ^ that should be considered > please complete this comment request and return by For further "information, please contact the Planning Department at 729-1181 , Ext. 25. ' • . ' Bud Plender, Assistant Planning Director TEB 141S77 . CITY OF CARLSBAD Planning Department (attach additional sheet if necessary) 1 r i mrr SAN DIEGO GAS & ELECTRIC COMPANY P.O. BOX 1831 SAN DIEGO. CALIFORNIA 92112 (714) 232-4252 F.LENO. MUC 010 November 9, 1976 Mr. Don Agatep Planning Director City of Carlsbad 'VU[/ ;"y'/S 1200 Elm Avenue CV^ J. 2 -, ' •-) Carlsbad, CA 92008 Dear Don: This letter is to clarify the information sent by letter, dated September 8, 1976 concerning our proposed water treatment facilities. First it should be understood that discharged power plant water, that will be treated by this facility, originates as fresh water provided by the Carlsbad Municipal Water District. Salt water is used only for cooling purposes and enters the power plant from the Lagoon within a closed conduit system. This water is routed within the power plant condensers and con- denses spent steam to a liquid state. The salt water system is contained within a closed conduit system and discharged to the beach. Because the salt water is confined within the conduit and quality of sea water is not changed, treatment is not required. Fresh or city water is used for the preparation of boiler feedwater. This water is softened, demineralized, and distilled at the plant to make it as pure as possible. This feedwater is then used to replenish the boilers. Other city water uses are for general plant cleaning processes, circulating water pump lubrication and employee water needs. Other than that water used for employee needs, which will be discharged into sewer lines, all remaining spent city water will be recovered for treatment in accordance with Water Quality Limitations and Guidelines (40 CFR Chapter I., Subchapter N, Part 423). This recovered water is classified as either Extended, Low Volume or Boiler Blow Down Water. Extended water requires treatment for removal of copper, iron and other contaminates. Low Volume water is required to be treated for lessor contaminates. Boiler Blow Down water is removed from the bottom of the boiler drum, the same as one would drain water from the bottom of their water heater and is collected for treatment. This Boiler Blow Down water will then be re-used in the nlant. AN INVESTOR-OWNED CORPORATION SAN DIEGO GAS & ELECTRIC COMPANY Mr. Don Agatep November 9, 1976 Page 2 In order to comply with the above water quality standards, a National Pollution Discharge Elimination System (NPDES) permit ' was issued to SDG&E allowing for the discharge of Extended and Low Volume water in compliance with the above regulations, (EPA Guidelines). The amount of water discharged to the Ponds for treat- ment will vary from day to day due to the fact that power plant operations and cleaning schedules require varying amounts of fresh water. Our NPDES permit #CA0001350 application to the California Regional Water Quality Control Board for Encina stipulates the following: 1. Extended water discharge will not exceed 21,000 gpd. 2. Low Volume discharge water will not exceed 135,000 gpd. 3. Boiler Blow Down water will not exceed 90,000 gpd. These volumes are based on maximum amounts and do not represent the amounts that will be used on a daily basis. As mentioned earlier, SDG&E will re-cycle the 90,000 gpd of Boiler Blow Down water because the quality is better and it can be re-used in the plant after treatment. The remaining Extended and Low Volume water, however, is of a much harder quality and thus not suitable for recovery. Before this water could be re-used, it would be necessary to install an additional major chemical processing complex for treatment. Even at that, a large volume of this remaining~>water would be lost in the chemical treatment process. /iricerely, F. M. Dudley Supervisor Land Planning FMD:dr SAN DIEGO GAS & ELECTRIC COMPANY P.O. BOX 1831 SAN DIEGO. CALIFORNIA 92112 (714) 232-4252 MUC 100 October 19, 1976 Mr. Don Agatep Planning Director City of Carlsbad 1200 Elm Avenue Carlsbad, CA 92008 Dear Don: As you recall, in mid-August we submitted to you an environmental assessment pursuant to obtaining a grading permit for proposed water treatment facilities at Encina Power Plant. Additionally, grading plans for the project were originally submitted on August 12 and resubmitted after corrections required of Engineering Department on September 28, 1976. To bring you up-to-date on the project, we received Coastal Commission approval on September 10. Additionally, the City of Chula Vista has granted a negative environmental declar- ation for an identical project at our South Bay Power Plant. We are concerned that further delays will not allow us to complete construction by EPA's July 1977 compliance date. The Federal Government has indicated that severe penalties may be in store for those not meeting the compliance schedule. We ask your earliest consideration in granting a negative declaration for environmental impact and process our application. This project should begin construction in the very near future. ciated. As before, your courtesy and cooperation is appre- FMD:bmv cc: Paul Bussey _. M. Dudley Supervisor jft |£ (J E I Y E flLand Planning ^ JLJ *- v ij JJ' OCT20 1976 CITY OF CARLSBAD Planning Department AN INVESTOR-OWNED CORPORATION STATE OF CALIFORNIA SAN DIEGO COAST REGIONAL COMMISSION /"H 77^ TD PrF T7 re* /T/T"* /H ^77^ TCP tfT\ TIP /C\ r?D H7) 7TD /7ft Tl 7 /I 7T(LL&J.iii 11 tth< 11 (LAi 111 A QDlf Al IPirlM (ID \/A \ 1L Tliis Certificate shall serve to notify all interested parties that this project has been: APPROVED EXEMPTED by the San Diego Coast Regional Commission in compliance with the California Coastal Zone Conservation Act of 1972. Location of Project (address); Control Number: Date of Commission Action: Verification: Within the existing sites of the.Encir.a ..3-ilverrat.p.,. _and South ay Power Plants/Carlsbad.. gan,_T>i ggn.... nhiilfl,jajat- F3983 September 10 , 19?6 Thomas A. Crandall, Executive Director San Diego Coast Regional Commission Notice to Contractors: This Certificate to be publicly displayed in a prominent location on the construction site until construction is completed. OCT261976 CITY OF CARLSBAD Planning Department ^^r STAf £ OF CALIFORNIA-CALIFORNIA COASTAL ZONE CONSERVATION COMMISSION Edmund G. BrOWn Jr. ..Governor SAN DIEGO COAST REGIONAL COMMISSION 6154 MISSION GORGE ROAD. SUITE 220 SAN DIEGO, CALIFORNIA 92120-TEL. (714) 280-6992 DATE: APPLICANT: September 25, 1976 San Diego Gas '& Electric Co. 101 Ash Street San Diego, CA. 92101 CONTROL NO: F3983 * MALCOLM A. LOVE Chairman ROBERT C. FRAZEE Vies Chairman JEFFERY D. FRAUTSCHY Representative to the California Coastal Zone Conservation commission THOMAS A. CRANDALL foracutive Director PROJECT ADDRESS:Within the existing sites of the Encina Silvergate, and South Bay Power Plants, in the cities of Carlsbad, San Diego, and Chula Vista, respectively You are hereby granted a development permit. This permit is issued after a hearing before the Commission and after the Regional Commission found that the proposed development will not have any substantial adverse environmental or ecological effect and is consistent with the findings and declarations set forth in Section 27001 and objections set -forth in Public Resource Code Section 27302. This permit is limited to development described below and set forth in material on file with the Commission, and subject to the terms, conditions, and provisions, hereinafter stated : A. DEVEI/DPMEirr:Construction of water treatment facilities, including in-plant piping modifications and recovery systems, holding, ponds, "and water treatment of equipment and buildings. Landscaping of all construction included. -Height - 20- -ft. -maximum - — - ..... - -•• Be TERMS AND CONDITIONS; 1. That the applicant agrees to adhere strictly to the current plans for the project as approved by the Commission. 2. That the applicant agrees to notify the Commission of any substantial changes in the project. 3. That the applicant will meet all the local code requirements and ordinances, and obtain ail necessary permits from State and Federal Agencies. 4. That the applicant agrees to conform to the permit rules and regulations of the California Coastal Zone Conservation Commission. 5. That the applicant agrees that the Commission staff may make site inspections of the project during construction and upon completion. 6. That construction on the project will start within one year following final approval of the project*by the San Diego Coast Regional Commission. Terms and Conditions are to run with the land. These terms and conditions shall be perpetual and it is the intention of the parties to bind all future owners and possessors of the subject property. 1/75 G. STANDAKD PROVISIONS STRICT COMPLIANCE; Permittee is under obligation to conform strictly to permit under penalties established "by 'California Coastal Zone Conservation Act of 19?2. (2) TIMELY DEVELOPMENT AND COMPLETION: Permittee shall commence development within one year following final approval of the project by the San Diego Coast Regional Commission. Completion of development shall occur no later than two years following Coast Commission approval of this permit. (3) ASSIGMABILITY OF PERMIT: This permit is not assignable unless the Permittee's obligations under the permit are assumed by assignee in writing within one year, and a copy of the required assumption agreement delivered to the Regional Commission. (4) APPEAL: Unless appealed to the State Commission within ten (10) working days following final action by the San Diego Coast Regional Commission, all terms and conditions shall be final. (5) DISCLAIMER: The permit is in no way intended to effect the rights and obligations heretofore existing under private agreements nor to effect the existing regulations, of other public bodies. (6) PERMITTEE TO RETURN COPY: This permit shall not be valid unless within ten (10) days Permittee returns a signed copy acknowledging contents to San Diego Coast Regional Commission. If you have any question on this permit, please contact the staff of the Regional Commission. Very truly yours, Thomas A. Crandall Executive Director xxxxxxxxxx Directions to Permittee: Permittee is to execute below and return one copy of this permit to the San Diego Coast Regional Commission. -> I have read and understand the terms, conditions, limitations, and provisions of this permit and agree to abide by them. Control No. F3983 -!.-' lf I i' '••" 11\ \ I •\./v V1 ^--W . V v- Signature of Permittee SAN DIEGO GAS & ELECTRIC COMPANY P.O. BOX 1831 SAN DIEGO. CALIFORNIA 92112 (714) 232-4252 August 30, 1976 F!LENO. MUC 010 Mr. Don Agatep Planning Director City of Carlsbad 1200 Elm Avenue Carlsbad, CA 92008 Dear Don: Recently San Diego Gas & Electric Company filed a grading plan for Water Treatment Facilities at Encina Power Plant. This letter will further explain the reasons for the proposed facilities and how we are going to meet future dis- charge requirements. In 1972, the EPA enacted as law PL 92500, commonly referred as the Clean Water Act, which requires that all persons discharging water to the ocean must improve water quality before discharging. In 1974, specific requirements were adopted by EPA in which all power plants would have to comply with the provisions of this act. The State Water Quality Control Board acts as the EPA agent in monitoring, specifying and approving plans for cleaning the water prior to discharge. In this regard, the State Water Quality Control Board in June, 1976 issued San Diego Gas & Electric Company NATIONAL POLLUTION DISCHARGE ELIMINATION SYSTEM permits (NPDES) for Encina and other plants which specify how we are to meet the EPA guidelines. The State of California can stipulate more restrictive requirements than EPA and we are now trying to meet their demands. The State requires that we report on a monthly basis and has given specific criteria as follows: Discharged water will be no greater than Ippm copper and iron and 15ppm oil and grease. This criteria is based on average monthly concentrations. In addition, total suspended solids can not be over 30ppm on an average monthly basis. The water ph must be between six and nine. We are going to meet the State and EPA standards by installing water treatment facilities at Encina and at other plants. The facilities will consist of ponds, controls and treatment equipment. The water ponds will equalize differences in flow rates from the various water sources at the power plant. These ponds are protected as follows: AN INVESTOR-OWNED CORPORATION r> SAN DIEGO GAS & ELECTRIC COMPANY•*»•- —-^ Mr. Don Agatep August 30, 1976 Page 2 A. There is an impervious liner to prevent any type of seepage but we have also designed a subdrain system in case this liner should be punctured in any way. B. There are overflow pipes to prevent the discharge from rising too high in the ponds. Piping from the ponds will process the water through treatment equipment to remove particles and allow for sampling of the water prior to discharge. The EPA guidelines were set up to establish a cleaner environment. We feel our project will meet these standards. The proposed treatment facilities will improve the quality of our existing discharge considerably. As you know, Prouts Pond, the existing discharge pond, has been in existence since Encina Unit 1. We feel it has done an adequate job, however, it could never be modified to meet the new EPA guidelines. Please remember, this project would never have been proposed had EPA not required specific standards for discharge water. With this further information, I would hope that you could process the environmental assessment as quickly as is possible. Sincerely, E. M. Gabrielson Supervisor Land Engineering EMG:Ima