Septembe

Client Subject: 24.0 hour Project Fruits Proj

Dear Mr. S

Fruits & AsAugust 24t

actual even

Technol

High-Vacuwell or recTo eliminathe static tube. As tthis drop vacuum isassociateinlet of thextractioncreates a

Occasionaliquid remmounted subtractedinstalled; fresh air iapplied vaconfigurat

During thewhere thefor future incineratedestructioflow diagr

er 8, 2017

High-Vacuum

ject: AL17-782

Smith:

ssociates, Inc. isth, 2017 at the ant.

ogy:

uum Remediacovery well. Tate moundingwater level de

the water tabltube. This sls applied to td with the site

he stinger asn well. This dr

cone of influe

ally, fresh air moval rate. In

on the well d from the tone on the sts introduced acuum becautions are show

e extraction pe liquids are sdisposal. The

ed in a forced on of the contaram of this pro

m Remediation

22

s pleased to prabove referenc

ation (HVR) This is accomg of the water epth. The appe attempts tourping effectithe well durine, seasonal w

ssembly is slraw down (onence, which m

(5 to 25 CFMorder to acchead to meaotal flow caltinger assemat the well he

use the inlet fwn in Figure #

process, the cseparated withe hydrocarbonair Thermal Oaminants in thocess is show

Event #3

rovide this sumced facility. Belo

involves the mplished by ap

table, a dropplied vacuumo mound due tively maintainng the event. water level daowly loweredne to ten feetmaximizes the

M) is introducecurately recorasure the amculated for ebly (well headead, the influfor fresh air i#1.

combined air ah a liquid scrun vapors are tOxidation (Thhe air streamwn in Figure #

mmary of the Higow is a summa

extraction of pplying high lep tube (commo and airflow eto the applicans the static In order to m

ata is analyzed to the maxt below the se efficiency of

ed at the wellrd the actual

mount of freseach extractiod vacuum), a

uence vacuums adjacent to

and liquids arubber / knockotransferred toOx) unit at 15, the clean air

#2.

gh-Vacuum Reary of both the

subsurface vevels of vacuonly known aextracted fromation of vacuuconditions ofminimize any ed. Once the ximum historitatic water lef the high vac

l surface to inremoval rateh air that is on well. Add

and one on thm reading willo this vacuum

re transferredout system an

o the off-gas t500 degrees r is discharge

emediation evee technology as

vapors and lium pressure

as a stinger) ism the well is pum, the liquidsf the water ta

change to thextraction proical water lev

evel) depressecuum process

ncrease the ae from the we

introduced. ditionally, twoe well casingl be artificially

m gauge port.

to the mobilend dischargedtreatment sysFahrenheit. A

ed into the atm

ent that was cons well as the re

quids via a mto the extrac

s inserted in tpulled throughs are “slurped

able while thehe current smocess is undevel observedes the water s.

irflow and enell, an airflowThis extra fr

o vacuum gag (influence vay lower than t. The setup a

e treatment syd into a stora

stem and are After thoroughmosphere. A c

nducted on esults of the

monitoring ction point. the well to h this drop d” through e elevated mear zone erway, the for each table and

hance the w gauge is

esh air is auges are acuum). If the actual

and piping

ystem age tank

h complete

       Page 2    September 8, 2017 

Calculations: During the HVR event, two measurements are taken, of both the influent and effluent flow rates, the concentrations of the vapors removed (before off-gas treatment), and the off-gas treatment system concentrations. These measurements are used to calculate the removal rates and the off-gas emission rates. The flow rates were measured using a Dwyer DS-300 Pitot tube attached to a differential pressure gauge. These flow rate measurements are reported in Actual Cubic Feet per Minute (ACFM). Before each event, these flow assemblies are calibrated to insure an accurate flow measurement. A separate flow rate is calculated for each influent well (if more than one well is connected), as well as for any additional fresh air that is introduced into the influent stream. The individual flow rates are combined to achieve the total flow and velocity derived from the extraction points. Because of the extremely high concentrations involved with a High Vacuum event, additional quench air (0 to 2,000 SCFM) is added to the vapor stream, just before entering the ThOx unit. An additional Pitot tube assembly is installed at the inlet of the ThOx unit and is used to measure the total flow. Combined with the off-gas concentration readings, this total flow rate is used to calculate the destruction efficiency of the system.

The concentration measurements are taken using a TVA-1000A FID instrument calibrated to methane. For comparison purposes, the removal rates are calculated in total carbon, as well as total hydrocarbons. This FID instrument has a dynamic range of 0-50,000 PPM as methane, 0-100,000 PPM as hydrocarbon. Our concentration samples are collected before any additional bleed or quench air is added to the extracted flow rate. These undiluted concentration measurements exceed the dynamic range of any FID instrument. In order to accurately record the high concentrations observed during a HVR event, a calibrated 10:1 dilution valve is used to cut the sample. This dilution valve, along with the FID instrument, is calibrated before the start of each event.

In order to eliminate the naturally occurring methane that is present during a typical HVR event, each concentration sample is measured twice. The first sample is collected directly from the system, and recorded as the total VOC concentration. The second sample is collected using an in-line activated carbon filter, which adsorbs the hydrocarbon compounds leaving only methane present in the sample to be measured. This methane only result is then subtracted from the total VOC concentration measurement (first sample), resulting in a Non Methane Organic Compound (NMOC) concentration. This NMOC concentration is used in the mass removal calculations. However, as with any FID instrument, the NMOC results are recorded as parts per million by volume (PPMv) as if the concentrations were methane. A conversion from methane to a hydrocarbon and from a volume to a weight is necessary to calculate an accurate mass removal rate. Using the NMOC concentration results and the TVA-1000’s factory certified response ratio for hydrocarbons, the NMOC results are converted to equivalent hydrocarbon mg/Ls. A TVA-1000 FID has an average response ratio of 600 PPMv per mg/L of unleaded gasoline and 200 PPMv per mg/L of diesel. Summaries of these calculations are shown in Figure #3.

Results: Phase Separated Hydrocarbon (PSH) was not detected in any monitoring wells prior to performing the event (well locations are shown in Figure #4). Once static water levels were established, during the course of the event the system was connected to MW-3. At the extraction point a stinger was located at the static fluid level, and once the ThOx unit’s normal operating temperature was reached, the inlet flow valve was opened for this well. Once the PSH was removed from the extraction well (if any), the stinger assembly was lowered into the static fluid level approximately 2 feet, creating a cone of influence.

During the 24.0 hour HVR event, the average ACFM was calculated at 50.35 for MW-3, with an additional 5.00 ACFM recorded at the fresh air breather port. The fresh air breather port is used during an event to enhance the volatilization and fluid recovery rates from the monitoring wells. A summary of the recovered flow rates are shown in Figure # 5. The combined total airflow from the extraction wells and breather ports averaged 55.35 ACFM.

       Pag

Throughoeffluent saA) and dequivalenevent. A sdischargea 99.92%recorded

Once the results arassociateremoved located inmanifeste

Sincerely,

Fruits & A

John M. F

ge 3 

out the event, ample ports. uring the evt gallons of gsummary of t

e (to the atmo% destruction

in this event (

HVR event wre shown in Ad monitoringand collected

n Mobile, Alabed waste trans

,

Associates, In

ruits

air concentraThe concent

vent, 59.65 pasoline). Addthe total equivsphere) was rate for the

(See Attachm

was completeAttachment A wells. Durind in a holdinbama. Fruits sportation and

c.

ation measureration results

pounds of caditionally, 2.73valent hydroc0.04399 pounThOx unit. I

ment A for resu

e, a second roA. After the eng the eventng tank on th

and Associad disposal tic

ements were s were entererbon was re

3 pounds of mcarbon recovends of carbonnduced vacuults).

ound of waterevent, there t, 3050 gallohe system antes, Inc. provkets are inclu

recorded peed into the HVemoved (199.methane was ery rate is shn (0.14681 pouum readings

r level measuwere no leve

ons of petrolnd later dispovided transpouded in Attach

Se

eriodically fromVR field mon.10 pounds oremoved and

hown in Figurounds of hydrs (in inches o

urements wasels of PSH reum contactosed of at O

ortation of thehment B.

eptember 8, 

m both the infitoring log (Aof hydrocarbd incinerated dre #6. The totrocarbon), thuof water colu

s recorded in recorded in ated water (P

Oil Recovery e PCW. Cop

2017 

fluent and Attachment

on, 32.32 during the tal off-gas us yielding mn) were

which the any of the CW) was Company

pies of the

Figures

Attachment A

HVR

FIE

LD M

ON

ITO

RIN

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Dat

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Faci

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ank

Rat

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Rat

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(in M

inut

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)(in

/Hg)

(AC

FM)

(ft)

(in/H

g)(A

CFM

)(ft

)(in

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(AC

FM)

(ft)

(in/H

g)(A

CFM

)(ft

)(in

/Hg)

(AC

FM)

(AC

FM)

Ft/s

ec.

(AC

FM)

(DSC

FM)

(F0 )

(PPM

v)(P

PMv)

(PPM

v)(m

g/m

3)(lb

s.)

(lbs.

)Lb

sG

al(F

0 )(P

PMv)

(SC

FM)

(Gal

lons

)(lb

s.)

(lbs.

)%

07:3

0 AM

0 m

in.

47.0

011

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36.8

5.0

31.9

41.8

40.5

77.0

79,6

000

79,6

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08:0

0 AM

30 m

in.

48.0

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51.1

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08:3

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30 m

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09:0

0 AM

30 m

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49.0

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51.1

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09:3

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10:0

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49.0

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10:3

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11:0

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12:0

0 PM

30 m

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01:0

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02:0

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30 m

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49.0

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02:3

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30 m

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49.0

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06:3

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07:0

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30 m

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07:3

0 AM

30 m

in.

49.0

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0029

99.7

5%

30 m

in.

30 m

in.

30 m

in.

30 m

in.

30 m

in.

30 m

in.

30 m

in.

30 m

in.

30 m

in.

30 m

in.

30 m

in.

30 m

in.

30 m

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30 m

in.

30 m

in.

30 m

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30 m

in.

30 m

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30 m

in.

30

min

.

Mon

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ell G

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ata

Cal

ibra

tion

Info

rmat

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DTP

DTW

Prod

.(ft)

DTP

DTW

Prod

.(ft)

DTP

DTW

Prod

.(ft)

C

alib

ratio

n G

as

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147

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49.7

649

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Cal

ibra

tion

Gas

Con

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PMv)

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pons

e Fa

ctor

(TVA

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0)

47.1

047

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48.0

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Num

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39.6

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Gal

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2:00

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Dra

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24.08

59.6

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2.73

199.

10

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0

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3050

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32.3

21

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Augu

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MW

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Extr

actio

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a:

Com

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etha

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Aver

age

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e:

Hyd

roca

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Rem

oved

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g

Res

ults

(ft)

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r

50.3

5Av

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ate:

Wel

lVa

cuum

Rea

ding

s at

:

Num

ber

MW

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Befo

re

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1 '' H

2OM

W-1

MW

-7

MW

-2-0

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'' H2O

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4 '' H

2OM

W-4

-0.5

2 '' H

2O

199.

10

-0.4

1

Aver

age

Rat

e:99

.92%

Aver

age

/ Tot

als:

3,05

0

53

3.03

2.73

20.

0439

9To

tal R

emov

ed:

0.14

681

Aver

age

Rat

e:Av

erag

e R

ate:

59.6

532

.321

0102030405060Recovery Flow Rates in ACFM

Tim

e

MW

-3 F

low

Dat

a N

ot U

sed

Not

Use

d

Not

Use

d N

ot U

sed

0.00

0.50

1.00

1.50

2.00

2.50

3.00

3.50

4.00

4.50

Recovery Rate (in gallons per hour)

Tim

e

(MW

-3)

Equivalent

Hyd

rocarbon

 Recov

ery Ra

te (in GPH

), from

 the follo

wing extractio

n wells: 

Attachment B