G2 TAYLOR YARD RIVER PARK Pre-Design Updateboe-tydp-d7-prod.psatnegmr3.us-west-2... · Materials...

G2 TAYLOR YARD

RIVER PARK

1

TAYLOR YARD G2 RIVER PARK

COMMUNITY WORKSHOP #3

October 4, 2018

www.lariver.org/G2

www.tayloryardG2.com 1

Pre-Design Update

G2 TAYLOR YARD

RIVER PARK

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AGENDAWelcome and Introductions

Project Update

Community Workshop and Survey Results

Update on Site Assessment

Water Quality Improvement Opportunities

Preliminary Design Concepts

Next Steps

Pre-Design Update

G2 TAYLOR YARD

RIVER PARK

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Project Management Team

Michael Affeldt

Director, LARiverWorks

Arturo Chavez

Senior Advisor

Gary Lee Moore, PE, ENV SP

City Engineer

Deborah Weintraub, AIA, LEEDAP

Chief Deputy City Engineer

Christopher Johnson, PE, GE

Program Manager

Katie Doherty, PE

Project Manager

Pre-Design Update

G2 TAYLOR YARD

RIVER PARK

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Project Partners

California Departm ent of Toxic

Substances Control

Pre-Design Update

G2 TAYLOR YARD

RIVER PARK

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PRIME CONSULTANT

Project Managem ent /

Leadership

Arch itectureUrban Design & Landscape

Arch itectureMed iterranean Landscape

Arch itecture

Econom ic

Developm ent

& Financing

Hydrology &

Hydraulics/

Inspect ions

Public

Engagem ent

Water

Quality

Civil Engineering

Botany, Biology &

Natural Habitat

Public

Engagem entPublic

Engagem ent

Environm ental

Docum entat ion

Soil Sam pling

Managem ent

City of Los Angeles

Bureau of Engineering

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TAYLOR YARDG2 LOCATIONMILE 25 OF THE LARIVER

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G2 TAYLOR YARD

RIVER PARK

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G2 TAYLOR YARD

RIVER PARK

8Image of Wetland Habitat Area Required by ARBOR

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Project Development and

Activities in 2018

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EXISTING

ARBOR Study

Concept

Jan Public Meetings

Feb Community Survey

Mar Internal Pre-DesignWorkshops

Apr Geophysical Survey,Groundwater Monitoring

May Begin Site Assessments

June Mayor’s Briefing

July Site Assessment Ongoing

Aug Site Assessment Ongoing

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G2 TAYLOR YARD

RIVER PARK

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Project Update





Next Steps

G2 TAYLOR YARD

RIVER PARK

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Community Site Tour and

Workshop January 2018

1111

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Community Workshop Table Comments

G2 TAYLOR YARD

RIVER PARK

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Community Survey Results

ARBOR Study

Concept

Over 1300 Respondents!

Key Findings:

• Nature - Respondents have a high interestin natural components; open space; trailsand habitat.

• Recreation - Outdoor recreation includingwalking / jogging and cycling ranked high,both as activities

• LA River - 84% reported having visited theRiver. Strong interest in River interactionand education.

• Consistent Results - Community prioritiesamong the public are largely consistentwith those of the community immediatelysurrounding the G2 parcel.

G2 TAYLOR YARD

RIVER PARK

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Community Survey Results

Favorite Park Features

Respondents were asked to selecttheir top three:

64% - access to nature

53% - walking and hiking trails

35% - scenic views

G2 TAYLOR YARD

RIVER PARK

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Preferred Natural Space/Wildlife Habitat Features:

40%- River Access

40% - Trails

33% - Enjoying Nature/Habitat

G2 TAYLOR YARD

RIVER PARK

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Preferred Activities/Recreational Elements:

60%- Walking/Running/Jogging

40% - Children’sNature/Adventure Play

38% - Meadow andPicnicking

G2 TAYLOR YARD

RIVER PARK

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Project Update





Next Steps

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Rail Operations - Equipment

Maintenance and Fueling:

• Early 1900’s – 2006

• Former facilities:-Diesel and machine shop

-Roundhouse, turntables

-Underground and aboveground

storage tanks

-Industrial wastewater treatment

plant

• Materials previously onsite:-Diesel and gasoline fuel

-Various oils, greases, acids, paints

and thinners

-Pesticides and herbicides

-Lead

-Cleaning and chlorinated solvents

Taylor Yard – Site Use and Environmental History

Aerial Photo of Historical Rail Operations (c 1994)

Diesel ShopService Tracks Machine Shop

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2018 Site Investigation (Began Summer 2018) “What are we investigating?”

G2 TAYLOR YARD

RIVER PARK

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2018 Site Investigation (Began Summer

2018) “What are we investigating?”

GROUNDWATER SAMPLING:

• 22 samples from 16 monitoring wells

SOIL GAS SAMPLING:

• 228 sample locations

• 452 total samples

SOIL SAMPLING:

• 78 locations

• 645 total samples

EXCAVATION TEST PITS:

• 23 pit and trench excavations

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Direct Push Equipment

for Soil Sampling

Mobile Laboratory for

Soil Gas Analysis

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G2 TAYLOR YARD

RIVER PARK

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Site Assessment: “What Are We Looking For?”

• Petroleum hydrocarbons(TPH)

• Metals

• Volatile Organic Compounds(VOCs)

• Semi-volatile organiccompounds (SVOCs)

• Pesticides/herbicides

• Polychlorinated Biphenyls(PCBs)

Split Spoon

Sampler

Showing TPH

Contamination

Field

Notebooks

Split Spoon Sampler

Showing Soil

Stratification

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Solution may include a combination of

alternatives to achieve appropriate

residential/ecological standards:

• Risk assessment for groundwater, soil and soilgas

• Groundwater: extraction/in-situ treatment intargeted areas

• Soil: excavation; engineered cap/paving(temporary or permanent)

• Soil gas: extraction/venting; vapor mitigationsystem

• Phytoremediation

Site Design Implications: “What Is The Remedy?”

G2 TAYLOR YARD

RIVER PARK

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2018:

October – Lab results complete

November – Lab results summary report submitted to DTSC

November and December - DTSC review

December – Remedial actions considered to address sitecontamination

2019:

February – Recommended Remedial Action Plan submittedto DTSC

April – DTSC approval of Remedial Action Plan

Remedial Action Plan Milestones

G2 TAYLOR YARD

RIVER PARK

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Project Update





Next Steps

G2 TAYLOR YARD

RIVER PARK

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• Regulatory Framework

• Tributary Watersheds

• Treatment Alternatives

• Infiltration

• Conclusion

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Watersheds

Draining Near

Taylor Yard G2

Parcel

Totalapproximatetributarywatershed of4,263 acres

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EXISTING

ARBOR Study

Concept

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G2 TAYLOR YARD

RIVER PARK

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Stormwater Quality Treatment StrategyHydrodynamic

Trash Removal

Unit

Sedimentation

Pond

Treatment

Stream*

Trash √ √

Ammonia √

Copper √ √

Toxicity √ √

Indicator

Bacteria

√

Nutrients (Algae) √

*Treatment Stream: Swales, Dry Creek, Bioretention, Wetlands

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Proposed Stormwater Treatment System

2828

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EXISTING

ARBOR Study

Concept

Onsite + Eagle Rock

Onsite + UPRC

Wet Weather

(85th Percentile)

+

Eagle Rock Wet

Weather (85th

Percentile)

Stormwater

management

system utilizes ~41

of the 42 acre site.

Treatment Area

Exhibit for Wet

Weather Flows

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G2 TAYLOR YARD

RIVER PARK

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Water Management - Conclusions

• G2 site provides significant space for multiple benefitsincluding: river access, stormwater management, habitatrestoration, active and passive recreation.

• All onsite stormwater is managed.

• Significant offsite dry weather runoff is also managed.

• Managing significant amounts of offsite wet weatherstormwater reduces use of G2 site for other uses.

G2 TAYLOR YARD

RIVER PARK

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Project Update





Next Steps

G2 TAYLOR YARD

RIVER PARK

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G2 TAYLOR YARD

RIVER PARK

Preliminary SiteConcepts Soft Edge

• Project Goals

• Public Input

• Community Survey

• Technical ConstraintsIsland

Three Islands

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G2 TAYLOR YARD

RIVER PARK

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Next Steps

November 2018: Site Assessment Report of Findings

December 2018: Begin Pre-Design Report; Prepare Soil Quality Report

and Soil Response Plan

Q1 2019: Public Meeting to Review Recommended Alternative;

Finalize Predesign Report

2019: Environmental Review

2019-2020: Detailed design for interim uses

2019-2021: Potential Programming

2020-2021: Construction (possibly phased) for interim uses

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2017 2018 2019 2020 2021

Meetings

Project Kick-off

Quarterly TASC and CLC Meetings

Public Meetings

Work Plan (Authorized)

Develop Preliminary Design Concepts

Refine Design Concept

Prepare Implementation Plan

Soil Quality Analysis

Develop Soil Sampling Work Plans

Soil Sampling

Prepare Soil Quality Report

Prepare Soil Response Plan

Next Tasks (Pending)

Environmental Review

Detailed Design - Interim Uses

Construction (Possibly Phased) - Interim

Uses

Potential Programming

As needed1 2 3 4 5

TAYLOR YARD G2 RIVER PARK - Project Schedule

Meeting

Number

Meeting Topics

1 Kick-off and background

2Design concept alternatives and Preliminary assessment

results

3 Recommended alternative

4 & 5 Project status updates

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INCLUSIVE

INSPIRATIONAL

RESILIENT

UNIQUELY LOS ANGELES

PEOPLE

WATER

HABITAT

CONNECTIVI TY

SOIL

HISTORY

AN OPPORTUNITY FOR INNOVATIVE

OPEN SPACE DESIGN

THANK YOU!

G2 TAYLOR YARD RIVER PARK Pre-Design Updateboe-tydp-d7-prod.psatnegmr3.us-west-2... · Materials...

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