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Home My WebLink AboutMINUTES - 07251995 - D6 TO: BOARD OF SUPERVISORS FROM: J. MICHAEL WALFORD, PUBLIC WORKS DIRECTOR DATE: JULY 25, 1995 SUBJECT: CONSIDER OPTIONS 1 AND 2 FOR, AND APPROVE INSTALLATION OF, WATER WELL 1 B, DISCOVERY BAY AREA. PROJECT#7393-6X9E89; CDD-CP# 95-30. SPECIFIC REQUEST(S)OR RECOMMENDATION(S)&BACKGROUND AND JUSTIFICATION I. Recommended Action: Option 1 - Willow Lake Court APPROVE the location of Water Well 1 B at Willow Lake Court site, and DETERMINE that the project is a California Environmental Quality Act Class 3 Categorical Exemption, and DIRECT the Public Works Director to prepare contract plans and specifications for construction, and DIRECT the Director of Community Development to file a Notice of Exemption with the County Clerk, and DIRECT the Public Works Director to arrange for payment of the $25.00 handling fee to the County Clerk for filing of the Notice of Exemption. Option 2 - Existing Well Site 1, Discovery Bay Boulevard APPROVE the location of the Water Well 1 B at existing Water Well 1 site located on Discovery Bay Boulevard, and DETERMINE that the project is a California Environmental Quality Act Class 2 Categorical Exemption, and DIRECT the Public Works Director to prepare contract plans and specifications for construction, and DIRECT the Director of Community Development to file a Notice of Exemption with the County Clerk, and DIRECT the Public Works Director to arrange for payment of the $25.00 handling fee to the County Clerk for filing of the Notice of Exemption, and DIRECT the Public Works Director to proceed to conduct an evaluation of the Centex Service Agreement and to consider negotiations of a possible amendment. Continued on Attachment: X SIGNATURE- RECOMMENDATION OF COUNTY ADMINISTRATOR _RECOMMENDATION OF BOARD COMMITTEE APPROVE OTHER SIGNATURE(S): ACTION OF BOARD ON July 2 5 , 199 5 APPROVED AS RECOMMENDED_OTHER_ Following discussion, the Board APPROVED Option No. 2 for the location of Water Well 1B at existing Water Well No. 1 site located on Discovery Bay Boulevard, and REQUESTED Public Works staff and Sanitation District No. 19 staff to return. to this Board with a renegotiated service agreement with Centex Homes to address the concerns of staff on this matter. V47'E OF SUPERVISORS - - xx UNANIMOUS(ABSENT - ) AYES: NOES: ABSENT: ABSTAIN: SE:pe\sd g:\EngSvc\SpDist\BO\Well 1 B 25.t7 Contact: Skip Epperly,(510)313-2253 Orig.Div: Public Works(Special Districts) cc: E.Kuevor,County Administrator Auditor-Controller I hereby certify that this is a true and correct copy of PW Accounting an action taken and entered on the minutes of the V.Germany,Design Boar+nf Supervisors on the date shown. Construction -, l y 3;1,5— Community Development ATTESTED: -.L Centex HomesP 7vp2 Gl�J PHIL ATCHEL�R,Clerk of the Board Sanitation District No. 19 e ° `�`�f of Supervisors and County Administrator Delta Diablo Sanitation District ,Deputy APPROVE INSTALLATION OF WATER WELL 1 B, DISCOVERY BAY AREA J U LY 25, 1995 PAGE TWO 11. Financiallmpact: There is no impact on the General Fund. The developer, Centex Homes, will pay for the installation of the new well. Ongoing maintenance and operation are paid through the Sanitation District 19 water and wastewater service charges. III. Reasons for Recommendations and Background: There is a serious need for improvement to the water supply system in Discovery Bay. The Discovery Bay community relies on five water wells for all public water purposes including household uses, irrigation and fire suppression. Water Well 1A is failing and it has been estimated that there is less than five years service remaining. Also, due to failures, Water Well 4 has less than one-third of its design capacity. Since 1991, the existing Water Well 1A in Discovery Bay has experienced operational problems, including excessive sand infiltration, excessive manganese production and iron bacteria fouling the screen filter in the well casing. When operated at maximum capacity sand is pumped into the pipes and eventually into houses. Manganese introduces black water with particles that are difficult to remove from plumbing fixtures. There have been several attempts to repair Well 1A, but most were successful only for a short period of time. Due to these operational problems, use of Water Well 1A is avoided and is only used in case of emergencies. There are approximately 3,100 dwelling units connected to the water supply system in Discovery Bay. As documented in the Discovery Bay West Environmental Impact Report, the water demand for the existing Discovery Bay community of 3,100 dwelling units is 5,250 gallons per minute (gpm). At build out of approved developments within the existing Discovery Bay community, there will be approximately 4,100 dwelling units requiring 6,000 gpm. The existing wells have a 4,150 gpm capacity. Should Well 1A fail, the system capacity would be reduced to approximately 3,150 gpm. A replacement of Well 1A will increase the reliable supply capacity from 3,150 gpm to approximately 4,650 gpm. This is still short of the required 5,250 gpm, however, there is a plan to restore the capacity of Well 4 through the Conditions of Approval for the Discovery Bay West Project. The replacement of Wells 1A and 4 will increase the reliable capacity to at least 6,150 gpm. On July 11, 1995, the Board directed staff to report back on July 25, 1995, with a comparison of two alternate water well sites. The following presents the significant advantages and disadvantages of the two optional sites. In addition, the attached chart (Exhibit A) includes advantages and disadvantages of the top four sites presented to the Discovery Bay Municipal Advisory Council Alternative 1 - Willow Lake Court: Advantages: The site is technically superior according to evaluations and opinions expressed by the consultants. The site meets regulatory approval because it is separated from local sewerage facilities. Disadvantages: There has been a threat of litigation if the site were to be located on the road median island. There could be delays and added costs in getting the well sited, constructed and operating if an inverse condemnation suit were to be filed. The delays associated with litigation of this type would be two to five years. Based on the testimony during the July 11, 1995 Board of Supervisors meeting, the award (if the plaintiff were successful) could range from $0 to more than $750,000, plus attorney's fees, loss of property value and interest charges. Alternative 2 - Existing Well 1 Site: Advantages: The site is already used for a well and a replacement well will have no additional impact on the environment. Disadvantages: One well has already failed at this site, and a second is failing. A new well at this site presents a risk to the community due to the uncertainty of completely sealing the existing wells on the site. In the event there is a cross contamination from the upper brackish water aquifer to the drinking water aquifer, the community will again have a substandard water supply and be forced to locate and fund another replacement well at an estimated cost of $475,000. APPROVE INSTALLATION OF WATER WELL 1 B, DISCOVERY BAY AREA J U LY 25, 1995 PAGE THREE III. Reasons for Recommendations and Background: (Continued) Alternative 2 - Existing Well 1 Site: Disadvantages Continued: Considering the history of wells and performance risks at this site, representatives of Centex Homes, Delta Diablo Sanitation District, and County staff, find the Centex Service Agreement does not contemplate or address issues such as risk, liability and yield at this site. An evaluation and a possible amendment to the agreement may be necessary to further define requirements of each party. IV. Consequences of Negative Action: Installation of the new water well, as required by the conditions of approval for the Centex Homes development, would not be implemented. The existing system would continue to be undersup- plied and at risk to meet fire flow demands. EXHIBIT A # 1 #2 #3 #4 Willow Lake Ct& Well 1 Discovery Bay Wilow Lake Rd& Willow Lake Rd Blvd&Beaver Ln Marina Rd Issues Property Size (sq ft) 11,350 11,350 7,800: 8,640: inadequate for inadequate for landscaping or landscaping or treatmentIrgatmenl -- Ability to Distribute Flour normal distribution system Sheet 4, min Sheet 8, min press- 48 psi Sheet 11, min Sheet 14, min press=50 psi press-50 psi press ft 44 psi break in distribution system Sheet 5, min Sheet 9, min press= 42 psi Sheet 12, min Sheet 15, min press-42 psi press w 44 psi press« -20 psi Mitigations engine silencers, engine silencers, building sound engine silencers, engine silencers, building sound attenuation, landscaping building sound building sound attenuation, attenuation attenuation I ndsca in Conform w/ DWR rgmts. yes no, maybe mitigated yes yes Conform w/ DHS rgmts. yes, with no, maybe mitigated yes, with yes, with mitigation mitigation mitigation Lend Owner Contra Costa Sanitation District 19 Harry Kuhr David & Kathleen County Lennon Assessed Value $0.00 $0.00 $51,800.00 $39,000.00 Costs 2,500 m 1,200 m 2,500 m 2,500 m 2,500 m Test Hole $13,500 $13,500 $13,500 $13,500 $13,500 Monitoring Well $14,500 $14,500 $14,500 $14,500 $14,500 Well Development $132,000 $132,000 $132,000 $132,000 $132,000 Pump station & equipment $200,000 $95,000 $200,000 $200,000 $200,000 Site Improvements $70,000 $70,000 Land purchase. $51,800 $39,000 Pipeline Improvements $260,500 Landscaping $4,500 $600 $1,000 Demolition $15,000 $15,000 Total $364,500 $340,000 $445,000 $412,400 $660,500 Advantages 1) good distrib. 1) good disirib. 2) adequate size 2) adequate size for trmt for trmt 3) reuse equip Disadvantages 1) aesthetic 1) dist. to sewer 1) dist. to sewer 1) no room for 1) no room for mitigation 2) access limited 2) access limited trmt, (rmt 3) noise dispers 3) noise dispers 2) landscape 2) landscape 4) Well 1 A must 4) Well 1 A must lints limts be sealed be sealed, 3) schedule may 3) schedule may 5) equipment be impacted if be impacted if can not be eminent domain eminent domain reused process is process is necessary necessary 4) not in north 5) pipeline work necessary CENTEX HOMES RECEIVED 1 July 24, 1995 JUL 2 4 IR CLERK BOARD OF SUPERVISORS Board Of Supervisors CONTRA COSTA CO. Contra Costa County 651 Pine Street, Room 106 Martinez, CA 94553-1293 RE: Agenda Item D-6 - July 25, 1995 Approve Installation of Water Well 1-B Discovery Bay Area MADAME CHAIR, MEMBERS OF THE BOARD: We understand that you are going to recommend one of two well sites in the north end of Discovery Bay in your meeting on July 25, 1995. The purpose of this letter is to provide information pertaining to this decision and our existing Service Agreement, dated August 16, 1994. The Service Agreement requires Sanitary District 19 to provide a well site and for Centex Homes to drill a well. . The north end sites which you are now considering have been evaluated by the Consultant. In his opinion, a well on these sites will produce far less than required by the Agreement. If any of these sites are chosen, it will be necessary to amend the Agreement. -These constraints were brought to the attention of the M.A.C. when all potential well sites were analyzed and the recommendation was made. Therefore, if you select a north side site, Centex Homes requests that you also direct your staff to prepare the necessary amendment to the Service Agreement so that it will be consistent with the consultant's report on the feasible production at the site. Making these changes will enable County staff and Centex Homes to provide a new water well which will benefit the Discovery Bay community. Thank you for your assistance in this matter. Very truly yours, CENTEX HOMES Northern California Division Steve Garrett Director of Forward Planning CENTEX REAL ESTATE COR,ORATION - NORTHERN CALIFORNIA DIVISION 1855 GATEWAY BOULEVARD SUITE 65O CONCORD, CALIFORNIA 94520 510 627 8100 FAX S10 827 8110 C"o Lo JUL 20 '95 15:42 510-634-5532 F. 1%1 B" M.A.C. July 21, 1995 Claudia Macdonald Chair 1152 Beach Court Clerk of the Board Discovery Bay,CA 94514 651 Pine Street (510)634-1081 Martinez, CA 94553 Peter Alexandra Dear Sir: Vice Chairman 706 Willow Lake Road The Discovery Bay Municipal Advisory Council is concerned with the Board Discovery Bay, CA 94514 of Supervisors decision to not accept the DBMAC's recommendation at (510)634-3586 the July 11, 1995, Board of Supervisors meeting after months of public hearings and research by the Delta Diablo Sanitation District, a competent Cliff Pisenti engineering firm, the Community Advisory Committee, and the DBMAC. Secretary/Treasurer 5052 Double Point "ay Therefore, if the recommendation is rejected, it is the Board of Supervi- Discovery Bay, CA 94514 y ons sons' responsibility to select a site in the north section of Discover Ba ($10)634-4466 p � y y, due to required fire flow,that will provide adequate water pressure per agree- ment with Sanitation District No. 19 and Centex at a non-excessive cost Jess Barba for drilling to the rate payers of Discovery Bay, and disregarding the threat 2071 Montauk Court of litigation which could be possible at any site. We request that the pro- Discovery Bay,CA 94514 cess be expedited due to the current inadequate water system. Please see (510)634-0530 attached memo regarding problems on July 17, 1995, in Discovery Bay as an example. Heidi Calvin 5000 Cabrillo Point This letter was approved by the DBMAC with a vote of 6 to 1.. Discovery Bay, CA 94514 (510)0;4-5304 Cordially, ' Walter Mac%'ittie DISCOVERY BAY 1466 Marlin Place MUNICIPAL ADVISORY COUNCIL Discovery Bay,CA 94514 (510)634.0827 Patrick Portway Claudia Macdonald 1908 Windward Point Chair Discovery Bay,CA 94514 (510)516-7332 CM/v1 CC: Supervisor Tom Torlakson Discovery Bay Municpal Advisory Council P. 0. Box 272 9 Discovery Bay,CA 94514 • (510)634-1222 C McCUTCHEN, DOYLE, BROWN & ENERSEN SAN FRANCISCO COUNSELORS AT LAW WASHINGTON, D.C. LOS ANGELES 1331 NORTH CALIFORNIA BOULEVARD TAIPEI SAN JOSE POST OFFICE BOX V WALNUT CREEK WALNUT CREEK,CALIFORNIA 94596 AFFILIATED OFFICES MENLO PARK TELEPHONE(510)937-8000 BANGKOK FACSIMILE(510)975-5390 BEIJING July 24, 1995 SHANGHAI RCC ENE® I DIRECT DIAL NUMBER e (510)975-5308 W5 ++ INTERNET HAND DELIVERY mglenn@mdbe.com TRA OSA co!soas Clerk Board of Supervisors Contra Costa County 651 Pine Street, Room 106 Martinez, CA 94553 Agenda Item D-6 -July 25, 1995 Board Meeting Approval of Installation of Water Well 1-B Discovery Bay Area Dear Clerk: Delivered to you herewith are the original and six copies of a letter from Centex Homes to the Board of Supervisors. Would you please deliver this letter to the Supervisors at the Board meeting on Tuesday, July 25, 1995. Very truly yours, �Ia4.,,- Mary L. Gl Secretary to Sanford M. Skaggs Enclosure CENTEX HOMES RECEIVED I July 24, 1995A2410i PARD OF SUPERVISORS Board of Supervisors obnmMACOSTACO. Contra Costa County 651 Pine Street, Room 106 Martinez, CA 94553-1293 RE: Agenda Item D-6 - July 25, 1995 Approve Installation of Water Well 1-B Discovery Bay Area MADAME CHAIR, MEMBERS OF THE BOARD: We understand that you are going to recommend one of two well sites in the north end of Discovery Bay in your meeting on July 25, 1995. The purpose of this letter is to provide information pertaining to this decision and our existing Service Agreement, dated August 16, 1994. The Service Agreement requires Sanitary District 19 to provide a well site and for Centex Homes to drill a well. The north end sites which you are now considering have been evaluated by the Consultant. In his opinion, a well on these sites will produce far less than required by the Agreement. If any of these sites are chosen, it will be necessary to amend the Agreement. These constraints were brought to the attention of the M.A.C. when all potential well sites were analyzed and the recommendation was made. Therefore, if you select a north side site, Centex Homes requests that you also direct your staff to prepare the necessary amendment to the Service Agreement so that it will be consistent with the consultant's report on the feasible production at the site. Making these changes will enable County staff and Centex Homes to provide a new water well which will benefit the Discovery Bay community. Thank you for your assistance in this matter. Very truly yours, CENTEX HOMES Northern California Division Steve Garrett -' Director of Forward Planning CENTEX REAL ESTATE CORPORATION NORTHERN CALIFORNIA DIVISION 1855 GATEWAY BOULEVARD SUITE 650 CONCORD, CALIFORNIA 94520 510 827 8100 FAX 510 827 8110