provide owners with clear, unbiased, engineering and science-based project management on civil and...
TRANSCRIPT
GREATWOOD MANAGEMENT COMPANY
SERVICES
Provide Owners with clear, unbiased, Engineering and Science-based
Project Management on Civil and Environmental Projects
TYPES OF CLIENTS
Law Firms Insurance Firms
Claims Management Firms Fuel Companies
Superfund and RCRA Sites Developers
Municipalities
Case Studies
What Strong Project ManagementCan do for Me!
Case Study #1
The Vermont Project
VERMONT PROJECT
BACKGROUND
Large former industrial site
Petroleum and Chlorinated solvent contamination
No consultant had been retained
VERMONT PROJECT
SCOPE OF WORK
Collect round of groundwater samples from existing wells
Collect soil samples from below the slab
VERMONT PROJECT
Comparison of Original and Competitive Estimates for Identical Scope of Work from
The Same Consultant
VERMONT PROJECT
HEALTH AND SAFETY PLAN (HSP)
Original Proposal$2000
Competitive Proposal$202
89.9%Reduction
While required by Federal OSHA regulations, only three or four pages need
to be changed for each site.
VERMONT PROJECT
ENVIRONMENTAL SCIENTIST (PER HOUR)
Original Proposal$60
Competitive Proposal$58
3.3%Reduction
While a 3.3% reduction does not seem like a significant rate, multiply the savings
By the total hours estimated for the project Provides a project savings of more than $400.
VERMONT PROJECT
DIRECT EXPENSES INCLUDING SAMPLING
Original Proposal$800
Competitive Proposal$578
27.8%Reduction
The competitive estimate scope of work required a more extensive and expensive method of collecting
groundwater samples. even so, it was almost $225 cheaper than
the standard bailer method estimated in the original proposal.
VERMONT PROJECT
WORK PLAN PREPARATION
Original Proposal$240
Competitive Proposal$0
100%Reduction
The work plan preparation was included in the competitive estimate within the $202 charge of the HSP line item.
VERMONT PROJECT
TOTAL SAVINGS
Original Proposal$3472
Competitive Proposal$951
72% Reduction Overall
Case Study #2
The New York Project
NEW YORK CITY PROJECT
BACKGROUND
11 Property Parcel 42 Underground Stroage Tanks (USTs) Volatile Organic Compounds (VOCs) Polynuclear Aromatic Hydrocarbons (PAHs) Consultant has been retained by the Client
NEW YORK CITY PROJECT
CONSULTANT’S PROPOSAL
10 Monitoring Wells Multitude of soil samples Analytical parameters including PCBs,
metals, waste characterization including flammability
$183,000 for the FIRST phase
NEW YORK CITY PROJECT
GREATWOOD MANAGEMENT’S PROPOSAL
5 monitoring wells 10 soil borings Volatile and semivolatile organic
analysis only
$68,000 for the ONLY phase
NEW YORK CITY PROJECT
CONCLUSION
Same scientific understanding of the site.
63% reduction in the cost of the initial investigation
50% or more reduction in long term monitoring costs.
NEW YORK CITY PROJECT
CLEAN UP!
16,000 tons of contaminated soils identified by consultant.
Maximum concentration of 20 ppm of SVOC contamination within soils.
640 lbs of contamination in the soil.
Case Study #3
150 Gallon Drip
150 GALLON DRIP
While putting away summer lawn furniture, the copper line from a 275 gallon oil storage tank was broken.
The tank free flowed for a period of 15 minutes and trickled for a period of 30 additional minutes.
150 GALLON DRIP
The tank had been filled approximately October 8.
Release occurred on October 25
150 GALLON DRIP
The oil company transferred the oil from the old tank to a new tank.
The oil company measured a free head space in the new tank of 6 inches.
An oil tank is typically only filled approximately 90%.
150 GALLON DRIP
There is a three inch floor drain that penetrates the floor of the basement.
The staining indicates oil has entered the floor drain.
The Fire Department has estimated a loss of 150 gallons due to the leak.
150 GALLON DRIP
How bad is the problem?
150 GALLON DRIP
How much oil was lost?
How would you investigate this site?
What remedial/monitoring measures would you allow your client to accept?
150 GALLON DRIP
FREE SPACE ESTIMATE
You know the size and shape of the tank.
You know the approximate depth of the whistle.
You can estimate the burn rate from the date of the fill to the date of the release.
150 GALLON DRIP
FREE SPACE ESTIMATE
The tank has a rounded top making depth estimate difficult.
You don’t know the real depth of the whistle, which could have a difference of up to two inches in length.
150 GALLON DRIP
FREE SPACE ESTIMATE
When we estimate the volume of oil released from the tank, using this method,
we estimated the tank
ACCUMULATED
approximately 17 gallons of oil!
150 GALLON DRIP
FLOW RATE METHOD
You also know the diameter of the line that discharged
from the tank.
150 GALLON DRIP
FLOW RATE METHOD
You know the approximate depth of oil in the tank before the release.
You know the depth of oil relatively accurately in the new tank.
You know the diameter of the line that discharges from the tank.
You may have heard of Gravity!
150 GALLON DRIP FLOW RATE METHOD
Assuming that the sheared off oil line behaved as a simple pipe, an estimate of the flow rate,hence volume, of the release was made using the following equation:
____ Q = cA √2gh
Where:Q = Flow in cfsc = Coefficient of DischargeA = Area of Discharge pipeg = Acceleration of Gravityh = head, height of column of fluid in tank
150 GALLON DRIP
FLOW RATE METHOD
____ Q = cA √2gh
Using a worst case scenario, we assumed that c = 1 and h is constant at 44 inches. Therefore, the flow Q is calculated as 0.0052 cfs
If we further assume that full flow was allowed for the estimated 15 minutes the home owner estimates elapsed from the moment of release to the point where the flow was completed stopped, a total of approximately 4.7 gallons escaped the tank onto the basement floor.
150 GALLON DRIP FLOW RATE METHOD
The Rest of the Story
The home owner had captured approximately 3.7 gallons of oil in a bucket before they were able to stop the flow completely.
Therefore, the estimated release volume was:
APPROXIMATELY ONE GALLON
150 GALLON DRIP
TV the drain and found no accumulated oil
Excavated the discharge are of the floor drain and found no accumulated oil
Monitored the drinking water well at the Residence twice (6 months apart) and found no detectable contaminants.
150 GALLON DRIP
Client was an environmental lawyer. More than 20 years of experience. Published in law journals. Superfund, RCRA and State hazardous
waste site experence.