Environmental Assessment May Table 3-21: Existing Aerial Transmission Lines Crossing DART Trackway

Transcription

1 Table 3-21: Existing Aerial Transmission s Crossing DART Trackway Utility Guideway Description Owner NB Station Crossing Type 345 kv Electric Transmission TMPA Elevated Track 138 kv Electric Transmission GP&L Elevated Track 138 kv Electric Transmission GP&L At Grade Track 138 kv Electric Transmission GP&L At Grade Track 138 kv Electric Transmission TXU Elevated Track 138 kv Electric Transmission GP&L Elevated Track Source: LOPEZGARCIA GROUP, 2006 Notes: TXU=Texas Utilities TMPA=Texas Municipal Power Agency Where utilities must be rebuilt or where new construction is warranted, work would be designed in conformance with requirements of the owning/operating utility company and government agency having jurisdiction. Utility line locations shown on the Existing Utility Composite and Modified Utility Composite drawings are taken from record drawings and are not field verified. Vertical invert elevations are taken from record drawings where available. The final designer is forewarned to field verify locations and of elevations of all existing utilities for design purposes. The proposed planned improvements require coordination with all utility companies to avoid conflicts. Mitigation Treatments An allowance is included in the project cost at the preliminary engineering level to cover relocation, protection, and/or consolidation of all utilities along the proposed DART Rail to Rowlett Alignment. The facilities to be relocated would be relocated prior to or protected during construction. In addition, utility relocation and protection would be closely coordinated with affected utility companies and designed to avoid any disruption in service Hazardous/Regulated Materials Impact Assessment This section presents the impact assessment for hazardous and regulated materials. The database search noted 166 citations of locations containing hazardous or regulated substances within the Study Area Banks 2006). These sites have the potential to impact construction of the proposed, based on the type of facility listed, distance from the proposed construction in the corridor, soil types, and surface elevation gradients. Because the soils in the proposed Study Area are 3-61

2 predominantly clays, which are slowly drained, and the surface elevation gradients are parallel to the rail line, which tends to move contaminants along the proposed Corridor rather than towards or away from it, these two criteria were not integral in the assessment process. Instead, the sites identified in the database search report were evaluated dependent on distance from the proposed Alignment, type of site, and status of any clean-up or corrective action taking place at the site. Using these criteria, sites were ranked as having a high, moderate, or low potential to impact the proposed DART Rail to Rowlett. In general, the sites had the following characteristics: High: s within 200 feet of the proposed Centerline that have documented contamination that has not been fully delineated, are undergoing monitoring, have conditions that do not meet current regulatory standards, or have a history of regulatory action. Moderate: s 200 feet to 1/4 mile of the proposed Centerline that have documented contamination that has not been fully delineated, are undergoing monitoring, have conditions that do not meet current regulatory standards, or have a history of regulatory action. UST currently in place within 200 ft of the rail line and active Resource Conservation and Recovery Act RCRA) sites and landfills within 1/8 mile of the rail line were also considered moderate risk sites. Low: All other sites within 1/4 mile of the proposed Centerline. Exceptions to these guidelines are three sites ID 20, 158, and 157) in Figure 3-6, which were characterized as moderate risk sites, despite being more than 1/4 mile from the proposed rail line, due to conditions at those sites. The Marrc Corporation site and Cuplex Inc. sites are brownfields whose contamination does not appear to have been remediated yet. The S&S Petroleum site is an open LUST case that has affected groundwater within 1/4 to 1/2 mile of a public water supply. Of the 166 sites that were noted to contain hazardous or regulated materials, one was identified as representing a high potential for impact to construction along the proposed DART Rail to Rowlett Corridor. Twenty-one were identified as having moderate potential for impact. The remainder was characterized as low risk. s ranked as high or moderate are shown in Figure 3-6 and listed in Table

3 31 28 Br an R D R D U V g Bra n c h LAKEVIEW PKY L on 1ST ST TT M WALNUT ST 125 D AVE ch W LE A MAIN ST 50 ROWLETT RD B AVE 158 RO df i d el GARLAND AVE Bra XH DE , LIBERTY GROVE RD CASTLE DR KIRBY RD LAVO N DR COUNTRY CLUB RD 78 U V Rowlett Creek GLENBROOK DR BUCKINGHAM RD MILLER ST N CE R TE LL VI E R D Legend Lake Ray Hubbard Figure 3-6 Hazardous Materials LEA 0 1,000 L 2,000 Feet Moderate Risk High Risk Proposed Downtown Rowlett Station Existing Downtown Station DART LRT Northeast Corridor Data Source: Risk s - Banks, 2005.

4 119, Table 3-22: High and Moderate Risk Hazardous Materials s Facility Name/Address L,M, H) Ray Boyd Construction Systems 210 Katy Street, Interstate Drop Forge 2805 E Centerville Road Curtis Oil Station 506 N First St. Lindy Lott Wrecker 5005 Dexham Rowlett S&L Automatic Transmission 428 N First St. Within 200 feet H X X Within 1/8 mile X UST-two tanks removed from ground RFG). LUSTgroundwater impacts, undergoing site assessment by TCEQ. UST two tanks permanently filled in place PFIP). UST three tanks in use. LUST groundwater impacts, case closed. UST one tank out of use. UST two tanks PFIP. 3-64

5 Table High and Moderate Risk Hazardous Materials s continued) Facility Name/Address L,M, H) Koch Materials 1340 Commerce St. Mangnum Engine Sales and Arum Etching 601 Walnut, Appliance Controls of Texas 3310 Main St. Rowlett Within 1/8 mile continued) X Conditionally exempt small quantity generator CESQG) has submitted a closure request. AST one tank out of use; two tanks in use. both large quantity generator LQG) and small quantity generator SQG) are inactive. LQG has had five actions, one is unresolved. active SQG. 3-65

6 Table High and Moderate Risk Hazardous Materials s continued) Facility Name/ Address L,M, H) Sentinel Plating Inc 610 N First St. MW Enterprise 630 E Walnut Cir Gleco Plating, Inc Grisham Dr. Rowlett City of 1436 E Rd. H&S Manufacturing 2913 Singleton St. Rowlett Within 1/8 mile continued) X UST one tank RFG. RCRAGN active SQG, four actions, one unresolved. active CESQG. active LQG, three actions, all resolved. no violations or actions recorded. active SQG. 3-66

7 80, Table High and Moderate Risk Hazardous Materials s continued) Facility Name/ Address L,M, H) Sherwin- Williams Co. 616 N Fifth St. Micropac Industries 905 E Walnut St. McSwains Garage 121 Austin St. Hoffman Drum Co. 108 Austin St. Within 1/8 mile continued) Within 1/4 mile X active LQG, three actions, one unresolved. RCRAGN, RCRA-TSD active SQG and transporter. SQG has had three actions, one is unresolved. inactive CESQG, one action, has been resolved. inactive LQG, one action, has been resolved. 3-67

8 Table High and Moderate Risk Hazardous Materials s continued) Facility Name/ Address L,M, H) Gleco Plating Inc Grisham Dr. Rowlett Taylors Hubcaps 129 Main St. Marrc Corporation 920 Profit Dr. Within 1/4 mile continued) X Within 1/2 mile X X active LQG, one action, is unresolved. LUST assessment incomplete UST six tanks RFG UST one tank RFG. RCRAGN inactive LQG. Brownfields, VCP soil and groundwater contaminated by metals and petroleum hydrocarbons, withdrew from VCP. 3-68

9 Table High and Moderate Risk Hazardous Materials s continued) Facility Name/Address L,M, H) Cuplex Inc E Highway 66 S&S Petroleum Texaco 4818 Highway 66 Rowlett Source: LOPEZGARCIA GROUP, 2006 Within 1/2 mile continued) X Brownfields, VCP site is under investigation. UST four tanks RFG. LUST groundwater impacts, pub dom water supply within mi, final concurrence pending. 3-69

10 Mitigation Treatments Based on the above assessment and the proposed construction activity within the Proposed corridor, the following recommendations would be incorporated as mitigation treatments during the final design and construction of the proposed DART Rail to Rowlett, in order to reduce potential impacts to a level less than significant. Phase I and, if necessary, Phase II Assessments would be performed within the proposed Corridor adjacent to the site identified as having a high hazard ranking so as to identify and delineate any contamination and affected soil or groundwater impacts requiring mitigation and/or cleanup. Depending on the type of construction scheduled within the proposed Corridor e.g. areas requiring substantial excavation), those sites with a moderate or low hazard ranking may need to be investigated further, as well. These studies may or may not include subsurface assessment. Further assessments should be based on proposed construction within the suspect hazard areas, including utility setbacks and new utility installations requiring trenching or microtunneling, soil material cut and fill operations, and drilled shaft construction. These construction activities may require de-watering operations or disposal of excavated soils that could affect construction schedule, should affected groundwater or soil be encountered. If unanticipated sources of hazardous or regulated materials are encountered during construction activities, the construction manager or designee would immediately notify DART s Environmental Compliance Manager. Specific mitigation activities that address the type, level, and quantity of contamination encountered would be immediately implemented. In addition to any measures outlined in DART Mitigation Policies and Environmental Protection Guidelines, the following measures will be undertaken to safeguard the health and safety of the workers, the residents and the environment: A Work Plan and a Health and Safety Plan would be prepared prior to initiating construction and would be implemented on-site. Any materials suspected of containing hazardous or regulated waste would be properly characterized and disposed of at an approved facility. Upon discovery of any unexpected hazardous/regulated material, or in the event of a spill of such material, the local/regional hazardous waste agency or fire department would be notified immediately Short- and Long-term Construction Impacts Short-term impacts and mitigation associated with constructing the proposed DART Rail to Rowlett are documented in the following section. The construction scenario describes the construction process by line segment and grade followed by sub-sections which analyze shortterm construction impacts by impact category. 3-70