Granular Activated Carbon (GAC) Filters at the Silverwood Lake Water Treatment Plant
2 Documents in Project
Summary
SCH Number
2002061012
Lead Agency
Crestline Lake Arrowhead Water Agency
(CLAWA)
Document Title
Granular Activated Carbon (GAC) Filters at the Silverwood Lake Water Treatment Plant
Document Type
NOD - Notice of Determination
Received
Posted
7/16/2002
Present Land Use
The Silverwood Lake Water Treatment Plant is a five acre area on which CLAWA maintains two aboveground reservoirs, a water clarifier, two holding tanks, sludge beds, and several control buildings.
Document Description
The proposed project will include the installation of six pairs of 10 foot by 18 foot tall Granular Activated Carbon (GAC) Contractors on approximately 4,125 square feet of graded land immediately east of Backwash Holding Tank #2 within the WTP boundary. When in operation, the GAC Contractors will be serviced by one semi-truck on a monthly basis to change the internal carbon media. An additional approximately 2,500 square feet of previously graded pad area will be used as a service truck turnaround area. Additional structures to be constructed include the installation of one 50 hp and one 100 hp booster pumps and minimal lengths of pipe to connect the GAC Contractors to existing pipelines. A proposed 30 foot by 15 foot building will be constructed adjacent to the north end of the existing filter building located at the northern edge of the WTP site to house boosters and dechlorination equipment. As a part of this project, a 15 foot by 30 foot building will be added to the east side of the existing control building located west of the proposed GAC units. An existing emergency wastewater basin will be converted into a percolation bed to process additional clarifier sludge resulting from the proposed project. The bottom of the existing 0.2 acre basin will be scarified, perforated pipes will be installed, and then covered with sand and gravel to complete the conversion. The proposed project will remove precursors to Trihelomethanes (THMs) and (THMs) themselves from water within the CLAWA water delivery system. The project is proposed in response to existing Department of Health regulations involving water quality. The proposed project will improve water quality leading to compliance with water quality standards.
Contact Information
Name
Roxanne Holmes
Agency Name
Crestline-Lake Arrowhead Water Agency
Contact Types
Lead/Public Agency
Phone
Location
Counties
San Bernardino
Cross Streets
North of State Highway 138, south of Silverwood Lake
Total Acres
Appox. 5
Parcel #
0341-014-34-0000
State Highways
138
Waterways
Silverwood Lake
Township
2N
Range
4W
Section
1/4 7
Base
SBBM
Other Location Info
City: Crestline
Notice of Determination
Approving Agency
Crestline-Lake Arrowhead Water Agency
Approving Agency Role
Lead Agency
Approved On
Determinations
(1) The project will have a significant impact on the environment
No
(2a) An Environmental Impact Report was prepared for this project pursuant to the provisions of CEQA
No
(2b) A Mitigated or a Negative Declaration was prepared for this project pursuant to the provisions of CEQA
Yes
(2c) An other document type was prepared for this project pursuant to the provisions of CEQA
No
(3) Mitigated measures were made a condition of the approval of the project
No
(4) A mitigation reporting or monitoring plan was adopted for this project
N/A
(5) A Statement of Overriding Considerations was adopted for this project
No
(6) Findings were made pursuant to the provisions of CEQA
Yes
Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.