APPENDIX H CRYSTAL GEYSER MT. SHASTA FACILITY WASTEWATER DISCHARGE ALTERNATIVES Draft Technical Memorandum Crystal Geyser Mt. Shasta Facility Wastewater Discharge Alternatives PREPARED FOR: Richard Weklych/CGWC Barbara Brenner/Churchwell White PREPARED BY: Peter Rude/CH2M Michael Randall/CH2M DATE: June 17, 2016 (Revised September 16, and October 7, 2016) PROJECT NUMBER: 677791.03.31.02 This technical memorandum provides descriptions of the four wastewater discharge alternatives for the Crystal Geyser Bottling Facility in Mt. Shasta to be evaluated in the Environmental Impact Report (EIR). The Crystal Geyser Water Company (CGWC) Mt. Shasta Plant is equipped with the following wastewater discharges: Domestic sanitary sewer pipe line currently connected to the City of Mt. Shasta’s sanitary sewer system. Industrial process wastewater pipe line historically connected to City sanitary sewer system. Industrial process rinse wastewater pipe line historically connected to CGWC leach field. The descriptions below define the proposed alternatives for discharge of the three wastewater flow streams defined above. Background The domestic sanitary sewer flows from CGWC are expected to be about the same as from the previous operations at the facility. CGWC will start operations with approximately 30 employees; this will eventually increase to approximately 60 employees. This will result in an average daily flow to the sanitary sewer system of about 300 to 600 gallons per day. Industrial wastewater discharges will range from approximately 20,000 gallons per production day (gppd) to approximately 54,000 gppd for one product line. In 5 to 7 years, when a second bottling line is added, discharges will approximately double, ranging from 40,000 to 100,000 gppd. It is unknown how much industrial wastewater the previous operations at the facility sent to the City sanitary sewer system. Industrial process rinse wastewater discharged to the leach field will range from 5,000 gppd to infrequent peaks of up to 25,000 gppd. When the second bottling line is added, discharges will approximately double, ranging from 10,000 gppd to infrequent peaks of up to 50,000 gppd. The existing leach field is permitted to accommodate 72,000 gallons per day (gpd), however it is designed to be expanded to 108,000 gpd. Previous operations at the facility consisted of two bottling lines and used the leach field to its permitted capacity. The industrial process wastewater peak discharge and industrial process rinse wastewater peak discharge will not be additive; they will not occur at the same time. Wastewater Discharge Alternatives CGWC has identified four alternatives for managing the discharge of the three wastewater flows from the facility. These alternatives are: Alternative 1 – Discharge to City Sanitary Sewer Alternative 2 – Discharge to City Sanitary Sewer and Leach Field Alternative 3 – Discharge to Leach Field during the production of sparkling water Alternative 4 – Onsite Treatment with Discharge to Leach Field and Offsite Irrigation Alternative 1 Alternative 1 consists of discharging all of the domestic and industrial wastewater to the City of Mt. Shasta’s sanitary sewer system as shown on Figure ALT1-1. This alternative would include direct discharge of domestic wastewater to the City’s sanitary sewer system through the existing connection at the Southwest corner of the facility site. The industrial process rinse water would be discharged to the City Sanitary Sewer. Industrial process water would flow to a series of two below grade concrete holding tanks and then sent to the pH Neutralization System to treat the pH of the flow stream to acceptable pH limits before discharge to the City’s Sanitary Sewer System. Alternative 2 Alternative 2 would involve a combination of discharging domestic wastewater and the industrial wastewater into the City’s sewer, with industrial process rinse water to be discharged into the Plant’s onsite leach field, as currently permitted by the Central Valley Regional Water Quality Control Board (Regional Board), as shown on Figure ALT2-1. This alternative would include direct discharge of domestic wastewater to the City’s sanitary sewer system through the existing connection at the Southwest corner of the facility site. The industrial process rinse water would be discharged to the existing onsite leach field located south of the CGWC Bottling Facility. Industrial process water would flow to a series of two below grade concrete holding tanks and then sent to the pH Neutralization System to treat the pH of the flow stream to acceptable pH limits before discharge to the City’s Sanitary Sewer System. Alternative 3 Alternative 3 would involve discharging domestic wastewater into the City’s sewer, industrial process rinse water to be discharged into the Plant’s onsite leach field, as currently permitted by the Central Valley Regional Water Quality Control Board (Regional Board), and industrial process wastewater from the production of only sparkling water would be discharged to the Leach Field under a new permit with RWQCB, as shown on Figure ALT3-1. This alternative would include direct discharge of domestic wastewater to the City’s sanitary sewer system through the existing connection at the Southwest corner of the facility site. The industrial process rinse water would continue to be discharged to the existing onsite leach field located south of the CGWC Bottling Facility. Industrial process water from the production of sparkling water, would flow to a series of two below grade concrete holding tanks and then sent to the pH Neutralization System to treat the pH of the flow stream to acceptable pH limits before being discharged to the Leach Field System. If two bottling lines operated at full production, the existing leach field would need to be expanded to accommodate the additional flows. Industrial process waste water from the production of sparkling water is relatively clean. A groundwater mixing model was developed to analyze the potential effect on groundwater quality near the leach field when industrial process waste water is discharged through the leach field. The results of the model, show a slight rise in several background constituents, but the constituents are still well within drinking water standards. A copy of the groundwater mixing model technical memorandum prepared by Geosyntec (September 19, 2016) is provide as a separate attachment. This alternative would have to go through the RWQCB report of waste discharge approval process before it could be implemented. Alternative 4 Alternative 4 would involve discharging the domestic wastewater to the City’s sewer and treating the industrial wastewater onsite, and discharging it to either the onsite leach field or offsite irrigation locations as shown on Figure ALT4-1. This alternative is similar to Alternative 3 with the additional option of land applying the treated wastewater during the irrigation season from May through October. With two bottling lines, the volume of treated wastewater is enough for about 20 acres of irrigated grass fields, to be on CGWC property as shown on Figure ALT4-2. Domestic wastewater would be directly discharged to the City’s sanitary sewer system through the existing connection at the Southwest corner of the facility site. The industrial process rinse water would be discharged to the existing onsite leach field located south of the CGWC Bottling Facility or to the offsite irrigation locations discussed above. Industrial process water would flow to a series of two below grade concrete holding tanks and then sent to a batched pH Neutralization System to treat the pH of the flow stream to acceptable pH limits and then to an onsite treatment system before discharge to the leach field or offsite irrigation field. Summary Table 1-1 summarizes the four alternatives evaluated for inclusion in the EIR. Table 1-1: Summary of Wastewater Discharge Alternatives Crystal Geyser Mt. Shasta Facility Wastewater Discharge Alternatives Wastewater Discharge Source Alternative Domestic Sanitary Industrial Process Industrial Process Sewer Rinse Wastewater Treatment Alt 1 City Sanitary Sewer City Sanitary Sewer City Sanitary Sewer Wastewater Treatment Alt 2 City Sanitary Sewer City Sanitary Sewer CGWC Leach Field Wastewater Treatment Alt 3 City Sanitary Sewer CGWC Leach Field CGWC Leach Field Wastewater Treatment Alt 4 City Sanitary Sewer Onsite Treatment to CGWC Leach Field Offsite Land Application Irrigation (and Leach Field in Non-Irrigation Season) 8" SS 8" SS 8" SS 4" SS 4" SS CGWC Bottling Facility 6" SS 8" to pH Neutralization System 8" to pH Neutralization System pH Neutralization System Concrete Tanks From CGWC Flow Meter Domestic Sewer System 8" 6" 8" 8" SS 8" SS Sewer Manhole To City Sanitary Sewer System Aerial photo source: Google ©2015, modified by CH2M HILL. Figure ALT1-1 Site Plan: Discharge to City Sanitary Sewer LEGEND Industrial process wastewater to City sanitary sewer Crystal Geyser Water Company 0 100 200 Clean out SS Sanitary sewer Industriality sanitary process sewer rinse wastewater to City sanitary sewer Mt. Shasta, CA Approximate scale in feet Manhole Flow direction DomesticDomestic Sanitary Sanitaryter toSewer Sewer ity sanitary se North WBG031814043631RDD FigureALT1-1_SitePlan_CitySwrConnection_V1.ai cmont 06/03/16 8" SS 8" SS 8" SS 4" SS 4" SS CGWC Bottling Facility 6" SS 8" to Leach Field 8" to Sampling pH Neutralization Point System pH Neutralization System Concrete Tanks 8" From CGWC Flow Meters Domestic Sewer System 8" 6" 6" 6" 8"