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Home My WebLink About1987-05-12; City Council; 8998; Solids Management RecommendationsCIVSOF CARLSBAD — AGENCQBILL AR« <T??<T MTG. 05/12/87 DEPT. KNG TITLE: NORTH COUNTY SEWAGE SOLIDS MANAGEMENT RECOMMENDATIONS '-ZMLL'DFPT. HtyKpP CITY ATTY ^/^O riTY MGR^*^- RECOMMENDED ACTION: Adopt Resolution No. Advisory Committee ^ idal approving the Encina Joint recommendations for implementation of O §j O OO North County Sewage Solids Management alternatives. ITEM EXPLANATION In 1985 several North County agencies contracted with John S. Murk Engineers to study long range alternatives to deal with sewage solids (sludge) generated by North County area sewage treatment plants. Phase II of that study was recently completed outlining a spectrum of alternatives to deal both regionally and locally with the disposal of sewage solids. The Encina Joint Advisory Committee (JAC) has reviewed these alternatives and adopted the following recommended concepts: 1. That the Encina Joint Powers pursue a regional sludge management solution with other interested North County agencies; 2. That the regional alternative include composting (Alternative 4G) rather than only air-drying (Alternative IB); 3. That one of the "Encina-only" composting alter- natives be selected as a fallback if a regional solution is not available; and 4. That the 37-acre site adjacent to the Encina Treatment Plant be considered as a fallback site for an "Encina-only" project, subject to completion of an EIR and site approval from the City of Carlsbad. Regional Alternatives The JAC recommendations authorize the Encina staff to explore further with other agencies joining in the construction of a regional solids processing facility to dry sludge to acceptable levels for disposal in landfills or to compost the material for marketing as a soil amendment. Contributing agencies and capital costs are outlined in Table 1. The JAC is recom- mending the compost option which doubles the capital costs and adds an estimated $.25 cents per month to the average sewer bill to construct and maintain (see Table 3). PAGE 2 OF AGENDA BILL NO. f 9 9 <T The advantages of composting are resource optimization and independence from landfill regulation. The JAC views com- posting as a worthwhile investment for future independence from potential increased costs due to restrictive solid waste expenses. Encina-Onlv Alternatives Should Encina be unable to join with other agencies in a regional solution, a series of smaller scale "Encina-only" options would be pursued at a somewhat increased cost. These alternatives, outlined in Table 2, vary in cost depending on land values and hauling distance - the more remote the site the lower the land costs and the higher the operational costs involved in hauling sludge to the site. The Encina 6 alternative involves development of a processing facility on the 37-acre site adjacent to existing Encina Treatment Plant. This option is not only the most expensive but would involve potential environmental impacts on City residents. In order to further explore this alternative, JAC would like to authorize an environmental report to be prepared by the environmental consultant selected to review the Phase IV expansion. Cost of the EIR is estimated in the range of $40,000.00 to $50,000.00. Based on the results of the environmental study, Encina could make application to the City for approval of the in-vessel composting plant. The General Manager of Encina will be available at the meeting to further describe the Encina 6 alternative. FISCAL IMPACT All of the alternatives being developed will involve capital development financing and increased operational costs to sewer users. The study assumes total user increases ranging from $ .32 to $ 2.20 for the average monthly cost per house- hold. Cost ranges are summarized on Tables 3 and 4. As costs become better known, the Council will be required to adopt a financing program to fund the increased cost. The JAC recommendation, if approved, would also involve pre- paration of the Encina 6 environmental document estimated at $40,000.00 to $50,000.00. PAGE 3 OF AGENDA BILL NO EXHIBITS Resolution No. foe* y approving the Encina Joint Ad- visory Committee recommendations for implementation of North County Sewage Solids Management alternatives. 2. Table 1 3. Table 2 4. Table 3 5. Table 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 RESOLUTION NO. 9064 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF CARLSBAD, CALIFORNIA, APPROVING ENCINA JOINT ADVISORY COMMITTEE RECOMMENDATIONS FOR NORTH COUNTY SEWAGE SOLIDS MANAGEMENT. WHEREAS, the City of Carlsbad recognizes the need to deal with the long-term management of sewage solids; and WHEREAS, the City of Carlsbad has reviewed the March 1987 North County Sewage Solids Management Study Phase II Project Report and the recommendation of the Joint Advisory Committee. NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Carlsbad that the following Joint Advisory Committee recommendations are approved in concept and authorizes appropriate action to proceed towards implementation: 1. That the Encina Joint Powers pursue a regional sludge management solution with other interested North County agencies; 2. That the regional alternative include composting (Alternative 4G) rather than only air-drying (Alternative IB); 3. That one of the "Encina-only" composting alternatives be selected as a fallback if a regional solution is not available; and 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 4. That staff is directed to review available 13 to 21 acre parcels within the City appropriate for in-vessel or open- air sludge processing. PASSED, APPROVED AND ADOPTED at a regular meeting of the Carlsbad City Council held on the 12th day of May , 1987, by the following vote, to wit: AYES: Council Members Lewis, Kulchin, Pettine, Mamaux and Larson NOES: None ABSENT: None KJDE A. LEtflS, Mayor ATTEST: ALETHA L. RAUTENKRANzT City)Clerk (SEAL) TABLE 1 DISTRIBUTION OF ESTIMATED CAPITAL COSTS AMONG PARTICIPATING AGENCIES (1987 Dollars) AIR DRY COMPOST AGENCY TOTAL COST TOTAL COST Escondido 4,201,700 7,980,000 Encina 5,332,500 10,129,300 Oceanside 2,642,600 5,016,300 San Elijo 612,900 1,164,000 Fallbrook 431,600 819,700 Rainbow 290,800 552,200 Valley Center 186,900 354,900 County District 246.100 469.200 TOTAL: 13,945,100 26,485.300 TABLE 2 NCSSNS ENCIHA ALTERNATIVES SUNNARY ALTERNATIVE DESCRIPTION AREA (Ac) ENCINA-1 1-B Air-Dry 39-50 Hwy. 76 CAPITAL ANNUAL TOTAL UNIT COST OX106) OMIffXIO6) COST (t/DT) 5.4-8.0 1.4-2.0 240-280 ENCINA-2 1-B Air-Dry San Pasqual 39-50 6.0-8.5 1.3-2.0 233-274 ENCINA-3 4-G Compost San Pasqual 16-21 9.8-14.6 2.3-3.4 346-477 ENCINA-4 4-G Compost Escondido 16-21 10.6-15.3 2.3-3.4 352-481 ENCINA-5 4-G Compost Encina 16-21 11.7-17.1 2.4-3.5 356-493 ENCINA-6 4-D Compost Encina 12.6 16.3-22.1 2.8-4.1 517-670 TABLE 3 NCSSMS ENCINA ALTERNATIVES ANNUAL COST DATA StMURY (16X T.S. WITHOUT IHIVER EXCEPT AS NOTED) ALTERNATIVE AMENDMENT COST ENCINA: 1-B 0 Regional ENCINA: 1-B 0 Regional with Waiver ENCINA: 4-G 245,700 Regional without Waiver ENCINA- 1 80,800 ENCINA-2 0 ENCINA-3 476,300 ENCINA-4 476,300 ENCINA-5 476,300 ENCINA-6 405,280 HAULING COST $ 474,700 $ $ $ $ $ $ $ $ 233 315 474 354 232 184 50 50 .700 .200 ,700 ,900 ,900 ,900 ,600 ,600 TIPPING FEES 213,300 158,100 0 213,300 213,300 0 0 0 0 COMPOST SALE 0 0 (131,000) 0 0 (251,200) (251,200) (251,200) (222,500) Ot 232, 172. 357. 311. 311, 1,062, 1,062, 1,062, 1,210. N 300 700 100 500 500 000 000 000 400 ANNUAL CAPITAL 713,500 556, 1,260, 1,049, 1,124, 1,891, 1,966, 2,155, 2,648, 000 150 500 000 500 400 400 660 TOTAL ANNUAL 1,633,800 1,238,800 2,047,150 2,129,800 2,003,700 3,411,500 3,438,400 3,493,100 4,092,440 MONTHLY C PER HOUSE! $1.02 $0.77 $1.27 $1.32 $1.25 $2.12 $2.14 $2.17 $2.55 Based on 2010 population projection of 335,000 in Encina service area (includes existing $0.35 charges).C& K?IS£BFDEw I ^^^^^ ^BEK. I Of »!• «•& ^11C TABLE 4 ENCINA ALTERNATIVES OPERATION AND MAINTENANCE BREAKDOWN ALTERNATIVE 1991 1997 2010 ANNUAL REGIONAL AIR $ 670,450 DRY (1-B) REGIONAL COMPOSTING (4-G) ENCINA-6 $ 574,500 MONTHLY ANNUAL MONTHLY ANNUAL MONTHLY1 $0.63 $ 749,400 $0.59 $ 920,300 $0.57 $0.54 $ 673,500 $0.50 $ 787,000 $0.49 $1,051,800 $1.00 $1,175,600 $0.92 1 Cost per EDU (includes existing $0.35 charge) 2 88,000 EDU'S 3 106,000 EDU'S 4 134,000 EDU'S $1,443,800 $0.90