Freitas + Freitas Engineering and Planning Consultants, Inc.

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1 Freitas + Freitas Engineering and Planning Consultants, Inc Ms. Lois Henry Board Members Lompico County Water District Lompico Road Felton, CA Subject: Review of Projects and Cost Estimates Proposed Bond Issue and Merger Lompico Water District Dear Ms. Henry and Ms. Schaller: As you requested, I have met with Rick Rodgers, Mike Mathiasen and your staff to go over the list of projects and their costs that San Lorenzo Valley Water District will require for the merger of your district with theirs. The original projects and their costs included in your election for the merger are shown below: Proposed Merger Project Categories and Estimated Costs Description Cost 1 Water Storage Tank Replacement $835,000 2 Treatment Plant Improvements $110,000 3 Service Line & Meter Replacement $660,000 4 Distribution System Interconnection $515,000 5 SCADA System Improvements $315,000 6 PRV Improvements $375,000 Grand Total $2,810,000 A brief description of the original work included in each category is described below. Water Storage Tank Replacement consisted of replacement of the six existing Lompico Water District redwood storage tanks with new bolted steel tanks supported on concrete ringwall foundations. The tanks are Lewis 1 (100,000 gallons), Lewis 2 (100,000 gallons), Madrone 1 and 2 ( each 60,000 gallons) and Kaski 1 and 2 (each 60,000 gallons). The new bolted steel tanks were assumed to be the same size as the existing tanks. Treatment Plant Improvements included no description of the work required. Service Line & Meter Replacement would consist of replacement of all existing service lines, meter boxes and meters. Distribution System Interconnection would consist of the installation of about 1,500 feet of new 8 pipeline from East Zayante Road to the new Interconnection booster pump station in Zayante Drive. SCADA System Improvements would consist of a supervisory control and data acquisition system (SCADA) at five sites to monitor and control the water system. The new SCADA system would transmit all data to the San Lorenzo Valley Water District master control center. G:\15011 Lompico Merger\Transmittal Letter docx 3233 Valencia Ave., Suite A1, Aptos, California fr8tus@aol.com

2 Page 2 PRV Improvements would consist with the removal and replacement of the existing 9 PRV (pressure reducing valve) stations in the water distribution system. These proposed improvements are shown on Figure 1 Facilities Map below: Mill Creek WTP PRV #2 PRV #3 Madrone Tanks PRV #6 Lewis Tank #2 Madrone Pump Station PRV #4 and PRV #5 Kaski Tanks Lewis WTP Lewis Tank #1 Well #5 PRV #1 PRV #8 PRV #7 Well #1 Well #7A New 6 Pipeline New Pump Station PRV #9 Zayante Dr. Figure 1 Facilities Map Lompico County Water District

3 Page 3 Revisions Proposed with Cost Estimates On June 23, 2015 I met with Rick Rogers of San Lorenzo Valley Water District to go over this list of proposed project and combine, refine or eliminate them to optimize the water system improvements.. We would propose to revise Water Storage Tank Replacement to consist of replacing Lewis 1 with a new 245,000 gallon tank bolted steel tank, replace Kaski Tanks with a single 125,000 gallon bolted steel tank and replace Madrone Tanks with a single 125,000 gallon bolted steel tank. This would duplicate the existing system storage and require only 3 tanks to be constructed rather than 5 new tanks. The existing Lewis 2 tank would be demolished and abandoned. The proposed cost estimate is shown below: Install 3 New Bolted Steel Tanks Remove Existing Tank 5 ls $ 10,000 $ 50,000 Clear and Grade Site 3 ls $ 15,000 $ 45,000 Construct Concrete Ring Wall Foundation 200 cy $ 300 $ 60,000 Install 125,000 gallon Bolted Steel Tank 2 ls $ 85,000 $ 170,000 Install 245,000 gallon Bolted Steel Tank 1 ls $ 140,000 $ 140,000 Repipe To Fill Tank 3 ls $ 7,500 $ 22,500 Construction Sub Total $ 487,500 Construction 10% $ 48,750 Surveying, Engineering and Design 15% $ 73,125 Construction 15% $ 73,125 Total Budget Cost $ 682,500 We would propose to revise Treatment Plant Improvements to consist of refurbishing the filter membranes of the existing treatment unit, refurbishing the wet well, installation of an engine generator and addition of activated carbon in the existing GAC filters. The proposed cost estimate is shown below: Refurbish Mill Creek WTP Refurbish Mill Creek WTP 1 ls $ 75,000 $ 75,000 Construction Sub Total $ 75,000 Construction 10% $ 7,500 Surveying, Engineering and Design 15% $ 11,250 Construction 15% $ 11,250 Total Budget Cost $ 105,000 We would propose to revise Service Line & Meter Replacement to consist of replacing all existing service lines including corporation stop, 1" service pipe, meter box and new meter. The proposed cost estimate is shown on the next page:

4 Page 4 Service Line and Meter Replacements Replace Service Lines with New Meter 500 ea. $ 1,500 $ 750,000 Construction Sub Total $ 750,000 Construction 5% $ 37,500 Surveying, Engineering and Design 5% $ 37,500 Construction 5% $ 37,500 Total Budget Cost $ 862,500 We would propose to revise Distribution System Interconnection to include 6 pipeline rather than 8 pipeline, installation of a second pump and starter in the existing pump station building and the installation of an engine generator for backup electrical power. The proposed cost is shown below: Distribution System Interconnection 6" Water Main Piping 1500 lf $ 90 $ 135,000 6" Gate Valves 10 ea $ 3,000 $ 30,000 Fire Hydrants 2 ea $ 5,000 $ 10,000 Install 2nd pump and Starter 1 ea $ 15,000 $ 15,000 Install engine generator 1 ea $ 25,000 $ 25,000 Construction Sub Total $ 215,000 Construction 10% $ 21,500 Surveying, Engineering and Design 15% $ 32,250 Construction 15% $ 32,250 Total Budget Cost $ 301,000 We would propose to revise SCADA System Improvements to consist of installing remote telemetry units (RTU) with appropriate input/output signals at Lewis Treatment Plant, Mill Creek Treatment Plant, Madrone Booster Pump Station, new inter zone pump station, Madrone Tank and Kaski Tank. A new master control center will be installed at Mill Creek WTP. The proposed cost is shown below: SCADA System Install RTU at Sites 6 ea. $ 40,000 $ 240,000 Install Master Control Center 1 ea. $ 75,000 $ 75,000 Construction Sub Total $ 315,000 Construction 10% $ 31,500 Surveying, Engineering and Design 15% $ 47,250 Construction 15% $ 47,250 Total Budget Cost $ 441,000

5 Page 5 We would propose to revise PRV Improvements to consist of replacing 8 existing pressure reducing stations. The Lewis 2 PRV (PRV #1) would not be replaced because the upper zone Lewis Tank #2 would be eliminated from the water system. The proposed cost is shown below: Replace Existing PRV Remove and Replace PRV 8 ea. $ 35,000 $ 280,000 Construction Sub Total $ 280,000 Construction 10% $ 28,000 Surveying, Engineering and Design 15% $ 42,000 Construction $ 42,000 Total Budget Cost $ 392,000 The summary of costs for these revised work items is shown below: Summary of Proposed Costs 1 Install 3 New Bolted Steel Tanks $ 682,500 2 Refurbish Mill Creek WTP $ 105,000 3 Service Line and Meter Replacements $ 862,500 4 Distribution System Interconnection $ 301,000 5 SCADA System $ 441,000 6 Replace Existing PRV $ 392,000 Grand Total $ 2,784,000 The original proposed work had an estimate of $2,810,000. The proposed revised costs included in this letter have a cost of $2,784,000 which is a little less but for all practical purposes the same as the original estimate of $2,810,000. Therefore I believe that the needed upgrade work for Lompico Water District to merge with San Lorenzo Valley Water District is essentially the same as the $2,810,000 amount included in your recent election If you have any questions, please call me. Sincerely, Michael J. Freitas Freitas Plus Freitas Engineering and Planning Consultants, Inc.