FINAL 2015 Urban Water Management Plan for Santa Clarita Valley Prepared for Castaic Lake Water Agency (CLWA) CLWA Santa Clarita Water Division Newhall County Water District Valencia Water Company (Los Angeles County Waterworks District No. 36/Cooperating Agency) Prepared by Kennedy/Jenks Consultants Nancy Clemm , P.E. Luhdorff & Scalmanini Consulting Engineers Stacy Miller Public Affairs DWR Approval & Errata Errata Sheet for Minor Corrections to the Santa Clarita Valley 2015 Urban Water Management Plan (UWMP) This errata sheet logs minor content errors that were identified after the final adoption of the Santa Clarita Valley 2015 UWMP. DWR has determined that these corrections are minor and do not require the UWMP to be amended. These data errors have been corrected in the Department of Water Resources (DWR) UWMP database at: http://wuedata.water.ca.gov. This errata sheet has been filed with the UWMP in all locations where it was made publicly available, including the California State Library. Name and agency of the person filing errata sheet: Dirk Marks, Water Resources Manager, Castaic Lake Water Agency General Notes: The 2015 Santa Clarita Valley UWMP was prepared by the Castaic Lake Water Agency, a wholesale agency, and its four retail purveyors, CLWA Santa Clarita Water Division, Newhall County Water District, Valencia Water Company, and Los Angeles County Waterworks Division No. 36 (not required to prepare an UWMP). As such, it addresses the DWR required components for both a wholesale, and a regional plan. The corrections/clarifications below were made on May 18, 2017; the corrections were uploaded to the DWR UWMP database on June 1, 2017. All UWMP text corrections are noted in red. 1 # DWR Comment Correction Wholesale/ UWMP Rationale Retail Location Comment Wholesaler: Castaic Lake Water Agency (CLWA) 1 Wholesale Demand – add In response to this comment, as Wholesale Appendix B DWR standard tables for a new table showing only well as Comment Nos. 3, 6, and (CLWA) CLWA had shown total the demand that is fulfilled 8 below, revised DWR Standard demands and supplies by Castaic wholesaler Tables 4-1 through 4-3, 6-1, 6-8 available to the CLWA service to 6-9, 7-2 through 7-4, and 8-4 area, rather than only those for CLWA to reflect only the demands met by CLWA demand for and availability of through its wholesale CLWA’s wholesale supplies (i.e., supplies. Revised DWR retailers’ groundwater use was standard tables for CLWA excluded from both total demand show only the demand and and CLWA supplies). Revised supplies fulfilled by CLWA as tables are provided below. the wholesaler. 2 Standardized Table 6- None required to address this Wholesale Appendix B Clarified with DWR that 3 and 6-5 – data should comment. However, revised (CLWA) and Section CLWA distributes recycled be removed. Both tables DWR Standard Table 6-5 to 4.2 water to retail purveyors, so should only have the box show 2015 recycled water recycled water is a CLWA checked on the top row. deliveries to each retailer (rather wholesale supply. However, than by type of use). And in 2015 recycled water supplies response to Comment No. 11 were shown in DWR Standard below, revised DWR Standard Table 6-5 by type of use; so Table 6-3 for CLWA with 2015 this table was revised to show actual data, and updated text in supplies to each retailer UWMP Section 4.2. Revised (consistent with DWR tables are provided below. Standard Table 6-4). And in response to Comment No. 11, revised DWR Standard Table 6-3 with 2015 (rather than 2014) data, and updated text in UWMP Section 4.2. 2 # DWR Comment Correction Wholesale/ UWMP Rationale Retail Location Comment 3 Wholesale Supply – None required to address this Wholesale Appendix B Clarified with DWR that Wholesaler should not comment. However, in response (CLWA) CLWA distributes recycled report recycled water as a to Comment No. 1 above, water to retail purveyors, so it source (Standardized revised DWR Standard Table 6- is a CLWA wholesale supply. table 6-8). 8 to show only supplies available However, in response to to CLWA (i.e., retailers’ Comment No. 1 above, groundwater was excluded from revised table to show only CLWA supplies). A revised table supplies available to CLWA. is provided below. 4 Compare DWR Table 6-9 None required to address this Wholesale Appendix B Clarified with DWR that data to Appendix C page 2. comment. However, in response (CLWA) in DWR Standard Table 6-9 is Numbers are not to Comment No. 1 above, consistent with UWMP consistent. Please revised DWR Standard Table 6- Appendix C Tables C-1 and compare and determine 9 to show only supplies available C-2. However, in response to the correct number. DWR to CLWA (i.e., retailers’ Comment No. 1 above, will also double check groundwater was excluded from revised DWR Standard Table this. CLWA supplies). A revised table 6-9 to show only supplies is provided below. available to CLWA. 5 Single driest year, Table Revised note to DWR Standard Wholesale Appendix B While text on UWMP page 6-3 7-1 and table on page 6-7 Table 7-1 to clarify that basis for (CLWA)/All and Page 6-7 describes the 2014 single-dry states year 1977 vs. single-dry year for SWP is worst- year basis for SWP supplies, narrative page 6-3. case actual allocation of 2014, UWMP Table 6-1 shows 1977 Please reconcile/clarify and 1977 for all other supplies. as the single-dry year base this inconsistency. Added a footnote to UWMP year. To clarify this, notes Table 6-1 with the same were added to both DWR clarification. Revised tables are Table 7.1 (for CLWA and all provided below. retailers) and UWMP Table 6- 1 explaining that for the single-dry year, SWP supplies are based on the worst-case 3 # DWR Comment Correction Wholesale/ UWMP Rationale Retail Location Comment actual allocation of 2014, while the year 1977 is used as the basis for all other supplies. 6 DWR Tables 7-2, 7-3 and Revised DWR Standard Table 6- Wholesale Appendix B DWR Standard Table 6-1 for 7-4 list groundwater as 1 for CLWA to indicate that (CLWA) CLWA showed the total of its supply for Castaic CLWA does not supply retailers’ groundwater use; wholesaler. These tables groundwater, and DWR this table was revised to should reflect correct Standard Tables 7-2, 7-3, and 7- indicate that CLWA does not supplies based on 4 to reflect only the demand for supply groundwater. Similarly, comments above and availability of CLWA’s DWR Standard Tables 7-2, 7- regarding groundwater wholesale supplies (i.e., 3 and 7-4 showed total and recycled water. retailers’ groundwater use was demands and supplies excluded from both total demand available to the CLWA service and CLWA supplies). Revised area; these tables were tables are provided below. revised to show only the demand and supplies fulfilled by CLWA as the wholesaler (i.e., excluding retailers’ groundwater supplies). 7 Financial impacts not Added a new Section 8.8.4, Wholesale Pg. 8-32 While financial impacts were addressed for CLWA, but Castaic Lake Water Agency (CLWA) addressed for the retail retailers are addressed in Financial Impacts. agencies, they were not Section 8.8. addressed for CLWA. 8 DWR standardized table Revised DWR Standard Table 8- Wholesale Appendix B DWR Standard Table 8-4 for 8-4. These tables should 4 for CLWA to reflect only the (CLWA) CLWA showed total demands reflect correct supplies availability of CLWA’s wholesale and supplies available to the based on comments supplies (i.e., retailers’ CLWA service area. This above regarding groundwater supplies were table was revised to show groundwater and recycled excluded). A revised table is only the supplies available to 4 # DWR Comment Correction Wholesale/ UWMP Rationale Retail Location Comment water. provided below. CLWA as the wholesaler (i.e., excluding retailers’ groundwater supplies). 9 Will need to upload Provided the correct adoption Wholesale DWR UWMP An incorrect Adoption correct adoption resolution. (CLWA) Database Resolution for CLWA was resolution. uploaded to DWR’s website. Retailers: All 10 Table 6-2. Quantifies Revised DWR Standard Tables Retail (All) Appendix B DWR Standard Tables 6-2 collection in the entire 6-2 and 6-3 for SCWD, NCWD, and 6-3 showed wastewater Santa Clarita Valley. and VWC to show estimated collection and discharge in the Population estimates wastewater collected, as well as entire Santa Clarita Valley, could be used to estimate wastewater discharged, within rather than in each retailer’s wastewater collection for each retailer’s service area. service area. For the revised the water district and Revised tables are provided tables, population estimates compare them to the total below. were used to estimate flow for the two plants. wastewater collection within each retailer’s service area and then compared to the total flow for the two wastewater treatment plants. 11 Table 6-2. 2014 data are Revised DWR Standard Tables Retail (All) Appendix B Actual 2015 data not available provided instead of 2015 6-2 and 6-3 to show actual 2015 and Section at the time the UWMP was data data, and updated text in Section 4.2 prepared; values have been 4.2 in UWMP. updated now that data is available. 12 Table 8-4 does provide Revised DWR Standard Table 8- Retail (All) Appendix B DWR Standard Table 8-4 for supply for the next three 4 for SCWD, NCWD, and VWC and Appendix the retailers showed total years for the region. This to show a breakdown of C supplies available to the entire should be for each retail minimum supplies available to the CLWA service area over agency.