SU0004714 - Laserfiche WebLink

Home Browse Search

ATTACHMENT I mately 75,000 gall. i of wastewater per day. The water TO INITIAL STUDY FOR UP-89-22 being disposed via the injection well is anticipated to have Total Dissolved Solids (TDS) of approximately 8,000 DISCUSSION OF ENVIRONMENTAL IMPACTS: parts per million. This wastewater will be injected and stored in two sandstone layers at a depth of approximately l.a. The project is in Flood Hazard Zone A and is subject to 4,500 feet. The TDS at this level are now approximately flooding to an elevation of 17 feet mean sea level. The 10,200 ppm. Injected fluids are anticipated to migrate project will be subject to the County Flood Ordinance, less than 1/4 mile away from the well bore. Additionally, which will require that structures be floodproofed or have water wells in and around the PSE property draw fresh water raised floor elevations to mitigate this potentially sig.,,-- from strata at depths less than 300 feet. When the ficant impact to a less than signiticant level. Negative Declaration was circulated to the State Clearinghouse for the earlier Site Approval application, no 1.b. The project will be utilizing approximately 500,000 gallons comments relative ' , the injection well were received, and per day of by-product remediation water from Sharpe Army no significant impacts relative to this aspect of the pro- Depot for process water (NPDES Permi: No. CA-0004839). ject were noted. The injection well will also be subject This source draws water from an aquifer located 50 feet to to approval and monitoring by the Regional Water Quality ` 300 feet in depth at well locations approximately two miles Control Hoard, the Air Pollution Control District, and the from the site. The water obtained from Sharpe Army Depot Environmental Protection Agency. consists of water drawn from remediation wells and pro- cessed with "air stripping" to remove Trichloroethene (EPA There will be an ammonia storage tank on-site. The storage Hazardous Waste No. U228), pursuant to requirements imposed and handling of ammonia will be subject to the requirements upon Sharpe Army Depot under the terms of the EPA's Natural of the County Air Pollution Control District and the County Priorities List dated July 22, 1987, and the State of Office of Emergency Services (Chapter 6.95, Section 25500, California Clean-Up and Abatement Order No. 87-026, dated at seq., of the California Health and Safety Code) . January 23, 1987. Currently, this water is being discharged into French Camp Slough. The Trichloroethene 7.a. The project site is currently outside the service area of content after air stripping is nondetectable. The water the Lathrop County Water District (LCWD); however, the LCWD quality is monitored, in accordance with the NPDES permit, has agreed to serve the site with potable water and sani- to ensure compliance with the drinking water standrds. Of tary sewage disposal. this 500,000 gallons per day, approximately 425,000 gallons per day will be converted to steam, and approximately 75,000 gallons per day will be disposed of via the proposed injection well. Eliminating the daily discharge of 500,000 gallons of remediation water per day into French Camp Slough should have a positive impact on the Slough's abi- lity to accommodate the storm water runoff and drainage from this general area, as additional capacity will be available. 6.c. The project site appears to be within 2,000 feet of two identified hazardous waste sites. There is no information on one of the waste sites (Air Products and Chemicals, APN t 195-270-04). The other site (Occidental Chemical Company, -- APN 195-270-02, 03, 04) involves the contamination of the groundwater with DBCP, EDB, and other pesticides. Remedial action is in place at the second site to extract and treat contaminated groundwater. Due to the nature and intensity of the proposed use, and because the facility will utilize public water and public sewer, it is not anticipated that the existence of these two nearby hazardous waste sites will create a health hazard, and this has not been iden- tified as being a significant impact. The amended project also involves the use of an injection well, approximately 4,500 feet deep. to dispose of approxi- Attachment I - 1 - (UP-89-22) Attachment I - 2 - (UP-89-22)