External Collaborator ATLAS ENGINEERING ALEWIFE STATION REDESIGN - - PowerPoint PPT Presentation

External Collaborator

ATLAS ENGINEERING ALEWIFE STATION REDESIGN

Jake Berry, Daniel Blakey, Brad Walden, Amanda Siciliano, Nicholas Tribble

Member Qualifications Project Background Information

2-4

Environmental

20-25

Presentation Outline

1

Question & Answers

26

Structural

15-17

Traffic

18-19

Geotechnical

5-10

Site/Civil

11-14

i

Member Qualifications

Co-op: JF White Contracting

• Create quantity

• Resolve onsite issues

• Hydraulic Engineering
• Commercial and

• Earth Retaining Walls

Co-op: Weston & Sampson

• Marking out

borings

• Overseen drilling

for soil samples

• Earth Retaining Walls
• Foundation Engineering
• Reinforced Concrete

• Soil Mechanics

Co-op: Feldman Land Surveyors

• Construction

layout

• Pile layout

• Structural Analysis
• Bridge Design

Co-op: Thompson and Litchner

• CivilCAD work
• Construction

inspections

• Traffic Systems Analysis
• Highway Engineering

Co-op: Simpson, Gumpertz & Heger

• Materials testing
• Laboratory

investigations

• Environmental Engineering
• Applied Research for CE
• Water & Wastewater

1

Project Description

Renovate Alewife Garage

Safe

Accessible

User Friendly

2

Location of Site

Alewife Station

35 Cambridgepark Dr, Cambridge MA 02140

3

Proposed Changes

• 1,500 parking spaces

○ Fewer parking spaces ○ Offset by proposed capstone project

• Anticipated flooding issues
• Improve and add retail space
• Re-examine traffjc conditions

○ Proposed interchange

LEGEND Blue = Wastewater Plant Red = Garage Footprint Green = Greenspace

4

Subsurface Investigation

• Groundwater table is roughly 8 ‘ below surface
• Sits on 10’ of artificial fill
• Bedrock consists of Cambridge argillite
• Reasonably weak layered sedimentary rock
• Contains grey argillite & minor quartzite
• Bedrock is roughly 100’ under the site
• Surface is relatively flat with elevations ranging from 2 - 5’
• No retaining walls on site

5

Subsurface Investigation

Bedrock (USGS) Surface Soil (Mass Geological Survey) 6

Boring Layout

7

Soil Profile

9 8

Boring Logs

• Artificial Fill
• Medium compact
• Medium to fine sand with traces of

gravel

• Silty Clay
• Stiff to very stiff
• Grey silty clay, with traces of fine

sand and gravel

• Pockets of soft to medium stiff clay
• Well-graded Clayey Silt
• Stiff
• Traces of coarse to medium sand

and gravel

• Silt
• Very stiff
• Some sand and clay with traces of

gravel

• Glacial Till
• Very soft and severely weathered
• Fractured decomposed argillite

9

Foundation

• Possible shallow foundation
• Clay layer is stiff
• SPT numbers range from 4 to 26
• Calculations to determine elastic settlement and primary consolidation in

clay

• Allowable settlement is no more than 2 inches
• Deep foundation if necessary
• Steel piles

10

Existing conditions

11

Existing Conditions Plan

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Proposed lay out cad

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Site/Civil Design

The following will be designed in accordance with Federal, State, and Local Regulations:

• Pre and Post Construction Stormwater Runoff
• Parking Plan
• Drainage Design / Stormwater Management

○ Flood Prevention System in Green Space ○ Catchment Tanks for Flushing Toilets

• Grading Plan
• Wastewater Tie-in Plan
• Potable Water and Utility Plans

• gin.aspx?direct=true&db=a9h&AN=124278084&site=eds-live&scope=site

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Structural Design

• Column Spacing:
• 42’ to 74’
• Reinforced Concrete Columns

and Slabs

• Commercial Space and

Utilities on Ground Level

15

Structural Design

16

Structural Design

17

Traffic Analysis

18

Traffic Flow Numbers

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LEGEND

Pharmaceuticals Apartments Software Companies Mixed Commercial Food Establishments

Cambridgepark Drive Existing Area

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Current Area: 62,000 sq. ft.

• Growing pharmaceutical

research & manufacturing hub

• Specialized pre-treatment of

industrial waste

• Effluent discharged to

Cambridge municipal sewers

Pharmaceutical Wastewater Treatment Plant

21

Emerging Wastewater Contaminants

• Activated Pharmaceutical Ingredients (APIs)

○ Antibiotics ○ Antidepressants ○ Nitrates ○ Metabolites

• Personal Care Products (PCPs)

○ Fragrances ○ Cosmetics ○ Moisturizers ○ Sunscreen UV Filters

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• Chemical Oxygen Demand (COD)
• Biological Oxygen Demand (BOD)
• Total Suspended Solids (TSS)
• Total Dissolved Solids (TDS)
• Acidity, pH
• Active Pharmaceutical Ingredients

Pharmaceutical Wastewater Characteristics

2000-6000 ppm 400-900 ppm 500-2000 ppm 1350-7250 ppm 1.5-6.0 (varies)

Parameters

Standard Pharmaceutical Effluent Values Raw Municipal Wastewater Values

500-1200 ppm 230-650 ppm 300-720 ppm 500-900 ppm 6.7-8.0 (varies)

Sources: Von Sperling 2007, National Research Council 1996, UN Department of Technical Cooperation for Development 1985

Sources: Pal 2017

23

Wastewater Treatment Guidelines

Massachusetts Water Resource Authority (MWRA) Code of Massachusetts Regulations (CMR) Environmental Protection Agency (EPA)

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Potential Wastewater Treatment Methods

• Chemical treatment
• Slow sand filtration
• Granular activated carbon adsorption
• Activated sludge process
• UV-free surface reactor process
• Thermal incineration
• Membrane-Integrated Hybrid Technology

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Thank You!

Any questions?

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