Draft Environmental Impact Report - East Bay Municipal Utility District

More documents

Recommendations

Info

Estates Reservoir Replacement Draft Environmental Impact ReportSummaryENVIRONMENTALIMPACT MITIGATION MEASURESSIGNIFICANCEAFTERMITIGATIONMeasure 3.9-1c: EBMUD will make a reasonable effort to limit operation of impact constructionequipment during the hours of 8:00 a.m. - 4:00 p.m. by implementing the following measures fornoise generating activities that may be greater than 90-dBA, including hoe rams, concreterecycling (concrete breakup, pulverizing, rear separation, crushing) and concrete pumping: If impact equipment (e.g., jack hammers, pavement breakers, and rock drills) is used duringproject construction, hydraulically or electric-powered equipment will be used whereverfeasible to avoid the noise associated with compressed-air exhaust from pneumaticallypowered tools. However, where use of pneumatically powered tools is unavoidable, anexhaust muffler on the compressed-air exhaust will be used (a muffler can lower noise levelsfrom the exhaust by up to about 10 dB). External jackets on the tools themselves will be used,where feasible, which could achieve a reduction of 5 dB. Quieter procedures, such as drillingrather than impact equipment, will be used whenever feasible. Erect temporary noise barriers or noise control blankets around the construction site,particularly along on sites adjacent to residential buildings. Utilize noise control blankets around the major noise sources to reduce noise emission fromthe site. Evaluate the feasibility of noise control at the receivers by temporarily improving the noisereduction capability of adjacent buildings by the use of sound blankets for example. Monitor the effectiveness of noise attenuation measures by taking noise measurements. Limit the noisiest phases of construction to 10 working days at a time, where feasible. Notify neighbors/occupants within 300 feet of project construction at least thirty days inadvance of extreme noise generating activities about the estimated duration of the activity.Impact 3.9-2: Construction ofthe Estates ReservoirReplacement Project couldincrease noise levels alongtruck haul routes.Mitigation Measure 3.9-2: The estimated maximum hourly noise levels would not exceed the 70-dBA speech interference criterion. Therefore short-term noise increases due to project related truckswould be less than significant. Implementation of Mitigation Measure 3.9-1.b (above) would alsoensure that truck traffic noise would be less than significant.Less than Significantsb09_001.doc S-21 7/22/2009
Estates Reservoir Replacement Draft Environmental Impact ReportSummaryENVIRONMENTALIMPACT MITIGATION MEASURESImpact 3.9-3: Construction ofthe Estates ReservoirReplacement Project couldcause vibration that coulddisturb local residents and causecosmetic damage to buildingsand structures.Measure 3.9-3: To prevent cosmetic or structural damage to adjacent or nearby structures, EBMUDwill incorporate into contract specifications restrictions on construction whereby surface vibrationwill be limited to no more than 0.5 in/sec PPV, measured at the nearest residential or other sensitivestructure. Implementation of Mitigation Measure 3.9-1c (above) will also ensure that impacts arereduced to a less than significant level.SIGNIFICANCEAFTERMITIGATIONLess than SignificantOperational ImpactsImpact 3.9-4: Noise increasesduring facility operations.Mitigation Measure: None Required: Long-term operation of the replacement EstatesReservoirs and refurbished Montclair Pumping Plant will not result in noise increases, over thelevels currently experienced for the existing facilities. In fact, burying the replacement tanksand replacing old pumps and electrical equipment with new equipment is expected to reduceoperating noise levels below what is currently experienced. (There is no record of complaintsassociated with operational noise at the Estates Reservoir site). Any replacement pipelinewould be located underground and would not generate noise. Therefore, no further discussionof operational noise associated with pipelines, the replacement reservoirs or the refurbishedpumping plant is provided.CUMULATIVE IMPACTSVisual Impact C-1:Cumulative short and long-termvisual impactsNo other known projects are proposed in the immediate area or vicinity during the Estates Reservoirconstruction period. EBMUD will develop detailed scheduling and phasing guidelines to minimizeshort-term visual impacts to the surrounding area during construction of the Estates ReservoirReplacement and Montclair Pumping Plant Upgrade. In addition, the site is screened from manysurrounding vantage points by intervening topography and mature vegetation. Consequently, thelikelihood of any cumulative adverse visual impact on local viewsheds during construction is low.Less than SignificantGeology Impact C-2:Cumulative geologic andseismic hazardsBiological ResourcesImpact C-3: Cumulative lossof habitat for special-statuswildlife and plantsSince none of the projects shown in Table 5-1 are located within the area of potential impact, therewould be no cumulative geologic or seismic impacts.As noted in Table 5.1, the Projects listed in proximity to the Project site are infrastructureimprovement projects, located on already developed sites or in urban areas. Therefore, the proposedProject would not contribute to cumulative impacts to biological resources.Less than SignificantLess than Significantsb09_001.doc S-22 7/22/2009
Page 1: Estates Reservoir ReplacementDraft
Page 4 and 5: TABLE OF CONTENTSEstates Reservoir
Page 6 and 7: Estates Reservoir Replacement Draft
Page 8 and 9: ACRONYMS AND ABBREVIATIONSABABAGAPC
Page 12 and 13: SUMMARYS.1 IntroductionThis Draft E
Page 14 and 15: Estates Reservoir Improvements Draf
Page 42 and 43: Chapter 2Project Description2.1 Ove
Page 58 and 59: Chapter 3Environmental Setting, Imp
Page 82 and 83:
Estates Reservoir Replacement Draft
Page 84 and 85:
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
3.5 Cultural Resources3.5.1 Approac
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
Page 126 and 127:
3.6 Traffic and Circulation3.6.1 Ap
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137:
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Page 200 and 201:
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
CHAPTER 5Cumulative Impacts, Growth
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
Page 230 and 231:
CHAPTER 6Report Preparers6.1 Lead A
Page 232 and 233:
APPENDIX APublic InvolvementPublic
Page 234:
APPENDIX BNotice of PreparationAUGU
Page 238 and 239:
Dingee Pressure Zone Improvement Pr
Page 240 and 241:
Page 242 and 243:
Page 244 and 245:
Page 246 and 247:
Page 248 and 249:
Page 250 and 251:
Page 252 and 253:
Page 254 and 255:
Page 256 and 257:
Page 258 and 259:
Page 260 and 261:
Page 262 and 263:
Page 264 and 265:
Page 266 and 267:
Page 268 and 269:
Page 270 and 271:
Page 272 and 273:
Page 274 and 275:
FIGURESDingee Pressure Zone Improve
Page 276 and 277:
Page 278 and 279:
Page 280:
show all

Draft Environmental Impact Report - East Bay Municipal Utility District

Create successful ePaper yourself

Delete template?

Save as template?