SU0015801 - Laserfiche WebLink

Home Browse Search

Air Quality and Greenhouse Gas Technical Report Griffith Energy Storage Project model was used to model the resultant health risk using construction PM10 concentrations modeled in AERMOD and based on emissions calculated by CaIEEMod. For risk assessment purposes, PM,o in diesel exhaust is considered DPM, originating mainly from off- road equipment during construction. For the Luna Valley construction HRA modeling, DPM from diesel- fueled off-road construction equipment and trucks was the only TAC evaluated. Annual DPM emissions for the Project, as presented in Table 7, were calculated to be lower than those for Luna Valley (0.21 tons per year for the Project versus 0.28 tons per year for Luna Valley); daily DPM emissions were also lower than those for Luna Valley (2.3 lbs/day for the Project versus 3.45 lbs/day for Luna Valley). The Luna Valley risk screening resulted in a calculated cancer risk of 6.2 per million and a Hazard Index of 0.004. These results were conservatively based on impacts at the property line rather than the nearest sensitive receptor(County of Fresno 2021). Due to the distance to sensitive receptors for the Project and Luna Valley's conservative assessment at the property line, TAC risk from construction of the Project on sensitive receptors would be well below the SJVAPCD screening thresholds for TACs. While TACs from the Project during construction are expected to have insignificant impacts on the surrounding communities, to minimize exhaust emissions from construction equipment, the Project is proposing the following design elements: 00 Ensure periodic maintenance and inspections per the manufacturers' specifications. 00 Reduce idling time through equipment and construction scheduling. Ultra-low sulfur diesel fuels (<=15 ppmw S)will be used. In addition, the Project would implement the following emissions reduction measures to comply with Rule 9510 (exhaust NOx and PM10 reduction)and Rule 8021 (dust control): 30 Use of Tier 4 engine technology for equipment greater than 85 horsepower. co Watering for dust suppression. Based on the temporary nature and the time frame for construction, these measures will maintain construction emissions and impacts to levels well within compliance with the SJAPCD air quality regulations. Use of these emission control strategies will ensure that the site does not cause any violations of existing air quality standards as a result of construction-related activities. Since operational activities would be limited to routine inspection and maintenance, an operational HRA was not required and the impact would therefore be less than significant. 2.5.5 Would the project result in other emissions (such as those leading to odors) adversely affecting a substantial number of people? Less Than Significant Impact. During Project-related construction activities, various diesel-powered vehicles and equipment could create minor odors. These odors are not likely to be noticeable beyond the immediate vicinity and would be temporary and short-lived. In addition, the nearest sensitive receptors on land not owned by the Project's current property owner are 1,000 feet or more from the Project site. Therefore, construction odor impacts would be less than significant. Long-term odors are associated typically with industrial projects involving use of chemicals, solvents, petroleum products, and other strong-smelling elements used in manufacturing processes. Odors also are associated with such uses as sewage treatment facilities and landfills. The Project involves no elements related to these types of uses. Therefore, no long-term odor impacts would occur with Project implementation. According to the California Department of Public Health, incidences of Valley Fever has been consistently high in the Southern San Joaquin Valley and Central Coast regions. The Northern San Joaquin Valley has shown a large increase in cases between 2000 and 2018; the highest median annual incidences OTETRA TECH 28 July 2023