CAPP – Public Meeting on DEIR Thursday, July 18, 2019 5-7pm
NOTICE OF AVAILABILITY OF DRAFT ENVIRONMENTAL IMPACT REPORT and NOTICE OF PUBLIC MEETING
For Draft EIR documents,click here.
Carpinteria Advanced Purification Project
TO: Agencies, Organizations, and Interested Parties
DATE: July 1, 2019
PROJECT TITLE: Carpinteria Advanced Purification Project
ANTICIPATED ENVIRONMENTAL EFFECTS: Carpinteria Valley Water District (CVWD) is the lead agency under the California Environmental Quality Act (CEQA) and has prepared a Draft Environmental Impact Report (EIR) for the Carpinteria Advanced Purification Project. The EIR also complies with National Environmental Policy Act (NEPA) requirements because of potential federal funding opportunities. The purpose of the Carpinteria Advanced Purification Project is to provide a drought-proof, local source of water supply by recharging the Carpinteria Valley Groundwater Basin with purified water. The EIR addresses construction and operation of an advanced water purification facility (AWPF), pump station, conveyance pipelines, injection wells, backwash pumps and storage, monitoring wells, and associated facilities. The Draft EIR analyzes all of the resource areas mandated by CEQA. All impacts were found to be less than significant or less than significant with mitigation measures incorporated. The Study Area contains three sites identified on the Cortese List (§65962.5 of the Government Code) of hazardous waste sites.
PROJECT LOCATION: The Carpinteria Advanced Purification Project is located in the City of Carpinteria and unincorporated Santa Barbara County, California. Carpinteria is located approximately 12 miles south of the City of Santa Barbara, and approximately 80 miles north of the City of Los Angeles. As shown in Figure 1, the Proposed Project is primarily located within the City of Carpinteria’s municipal boundaries, with the exception of one potential injection well site (Well Site #6) and associated pipeline. The Project footprint covers the AWPF site at 5351 Sixth Street (co-located with the Carpinteria Sanitary District’s Wastewater Treatment Plant), an up-to-40-foot wide corridor that follows the conveyance pipelines, 10,000 square feet at each of up to three injection well sites, 5,000 square feet at each of three monitoring well sites, and the immediate area around the existing ocean outfall. The injection well sites would be located approximately 0.8 to 1.0 miles north of the AWPF. Five potential injection well sites have been identified, though only three would be selected as design continues and property rights are acquired. Conveyance pipelines between the AWPF and the injection wells would generally run within the public roadway rights-of-way (ROW). The pipeline would cross U.S. Highway 101 at the Linden Street Overpass.
PROJECT DESCRIPTION: The purpose of the Carpinteria Advanced Purification Project is to create a new drought-resistant and reliable supply of local water, produce water suitable for groundwater recharge and potable reuse, and reduce CVWD’s reliance on imported surface water and storage at Lake Cachuma. The Project is being developed in partnership with Carpinteria Sanitary District (CSD), the owner/operator of the CSD Wastewater Treatment Plant (WWTP). The Project involves construction and operation of a new advanced water purification facility, up to three new injection wells, pipelines to convey advanced treated water to the injection wells for recharge to the Carpinteria Groundwater Basin, and three monitoring wells to monitor potential changes in groundwater levels and quality. Figure 1, attached to this document, show an overview of the Proposed Project, while Figure 2 shows the proposed layout of the AWPF and associated facilities within the existing WWTP site. The proposed Project would produce approximately 1,100 acre-feet per year (AFY) (1.0 million gallons per day (MGD)) of purified water from the CSD WWTP for injection into the local groundwater basin, where it ultimately would be used for CVWD potable water supply. Existing CVWD production wells would be used to recover treated water from the groundwater basin. The ultimate project assumes an expansion from 1.0 MGD to 1.2 MGD based on projected future increases in WWTP flows. The ultimate Project includes the following facilities: • AWPF consisting of equalization tank, microfiltration, reverse osmosis, and an advanced oxidation process, to be located on the WWTP site • Purified water pump station, to be located on the WWTP site • 6,100 linear feet (LF) of 12-inch conveyance pipeline from the PWPS to a well lateral split point, including Caltrans installation for the Linden Avenue overpass over US Highway 101 • 2,000 LF of 8-inch conveyance pipeline from the well lateral split point to individual injection wells • Up to three 14-inch injection wells with backwash pumps and one 42,000 gallon tank • Either 1,400 LF of 12-inch well backwash discharge piping to existing sanitary sewers, or 600 LF of 12-inch to existing storm drain culverts. • Six monitoring wells • Modifications to the CSD WWTP ocean outfall
LEAD AGENCY: Carpinteria Valley Water District
DOCUMENT AVAILABILITY: The Draft EIR can be viewed on CVWD’s website or in print at the following locations:
- Project Website: http://cvwd.net/capp/
- Carpinteria Valley Water District Office, 1301 Santa Ynez Ave, Carpinteria, CA 93013, (805) 684-2816, Open 8 a.m. to 5 p.m. Monday-Friday.
- Carpinteria Sanitary District Office, 5300 Sixth Street, Carpinteria, CA 93013, (805) 684- 7214, Open 8 a.m. to 5 p.m. Monday-Friday.
- Carpinteria Library, 5141 Carpinteria Avenue, Carpinteria, CA 93013, (805) 684-4314, Open 10 a.m. to 7 p.m. Monday and Wednesday, 10 a.m. to 5:30 p.m. Tuesday, Thursday, Friday, and 10 a.m. to 5 p.m. Saturday.
PUBLIC REVIEW PERIOD: July 1 to August 30, 2019
PUBLIC MEETING: CVWD will hold one public meeting to receive comments on the Draft EIR and provide information about the proposed Project. The public meeting is scheduled as follows:
Date/Time: Thursday, July 18, 2019 5:00 p.m. to 7:00 p.m.
Location: Carpinteria Library – Arts and Lecture Room 5141 Carpinteria Avenue Carpinteria, CA 93013
CONTACT: All comments should be submitted in writing by August 30, 2019 to: Email: email@example.com Mail: Mr. Robert McDonald Carpinteria Valley Water District 1301 Santa Ynez Ave. Carpinteria, CA 93013 Phone: (805) 263-4826
It only happens when it rains
As they say, when it rains it pours. On Friday, Feb. 17 it poured in Carpinteria. Nearly 4.5 inches of rain fell during a 24-hour period, more than I’ve seen in any single day since my job made me start paying attention to such things.
Of course, with the prolonged drought, we need the rain badly and this deluge allowed our local water purveyors to breathe a small sigh of relief. For wastewater agencies, however, intense rainfall events like this one can end up in the category of “too much of a good thing.”
Infiltration and inflow, or I&I, is an industry term that refers to storm water or shallow groundwater that enters the sewer collection system during and immediately following a rain event. In the wastewater business, I&I is bad.
There are several ways that rainwater gets into the sewer system. Surface flooding can inundate sewer manholes allowing water to enter the system through vent holes in cast iron manhole lids. When soils are saturated, rainwater can infiltrate the sewer system through cracks in underground manholes, sewer mains and sewer laterals. Finally, and most significantly, storm water can enter the sewer system through the illicit connection of roof drains, yard drains and other surface drains.
No doubt all of these sources of I&I came into play on Feb. 17. Flows into the wastewater treatment plant were over three times higher than normal—we treated 3.4 million gallons as compared to just over a million gallons on a normal day. Fortunately, the treatment facility has the hydraulic capacity to handle these abnormal events, but pumping and treatment costs are dramatically affected by I&I.
I&I presents an even bigger problem in the sewer collection system. The District has seven pump stations, located throughout Carpinteria, that convey wastewater to the treatment facility. These pump stations, and the network of sewer pipelines throughout our service area, are not designed to handle tremendous amounts of storm water inflow. Flows at some of our remote pump stations during this event were four or five times higher than normal, requiring District staff to mobilize emergency auxiliary pumps in order to keep up with incoming flows. Even with our pre-storm preparations, a major effort was required throughout the day to avoid sewer spills or overflows that would have otherwise resulted from excessive I&I.
Sewer spills are serious—they can affect water quality, threaten public health and result in major fines or penalties. Much of our focus at the District is on maintaining and improving our sewer collection system to avoid spills and overflows. We have an ongoing program to rehabilitate or replace pipelines and manholes, eliminating sources of I&I, but to really be effective we need help from our customers.
First and foremost, make sure that your roof drains, downspouts, yard drains or other surface drains are not connected to the sanitary sewer. District staff members are available to help verify this or to investigate any storm drains that may be inadvertently connected to the public sewer system. Second, consider having your lateral sewer—the pipe between your home and the street—inspected to make sure there are no cracks or breaks or other defects that would contribute to I&I. There are several local plumbers who are able to assist homeowners with video pipeline inspections and any required repairs. Your help on these fronts is greatly appreciated.
I know we are all hoping for a few more rainstorms this season to fill our reservoirs and replenish our groundwater resources. Personally, I’m hoping it comes in smaller doses, but we will be ready no matter what.
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