PALL

Life

Sciences

CASE

NARRATIVE

Monthly

Data

Pall

Life

Sciences

Project:

1,4-Dioxane

Remediation

Date:

April,

2021

Gelman

d/b/a

Pall

Life

Sciences

642

South

Road

Ann

Arbor,

48103

734.436.4025

phone

734.436.4040

fax

With

the

exceptions

noted

as

fl

ags

or

footnotes,

standard analytical

protocols

were

followed

samples

and

no

problems

were

encountered

or

anomalies

observed.

In

addition

all

laboratory

within

established

control

limits,

with

any

exceptions

noted

below.

Each

sample

was

analyzed

possible

reporting

limit

within

the

constraints

of

the

method.

In

some

cases,

due

to

interference

high

concentrations,

samples

were

diluted.

For

diluted

samples,

the

reporting

limits

are

adjusted

required.

Gelman

Sciences,

Inc.

d/b/a

Pall

Life

Sciences

(PLS)

attests

to

the

validity

of

the

laboratory

Ann

Arbor,

Michigan

Environmental

Laboratory

facilities

reported

herein.

All

analyses

performed

Environmental

Laboratory

facilities

were

done

using

established

laboratory

SOPs

that

incorporate

QA/QC

the

application

methods.

PLS's

Environmental

group

has

reviewed

the

data

for

compliance

plan,

and

data

have

been

found

to

be

compliant

with

laboratory

protocols

unless

otherwise

below.

All

1,4-dioxane

and

bromate

samples

were

analyzed

by

Pall

Corporation's

Environmental

in

this

report

meet

all

NELAP

requirements

for

parameters

for

which

accreditation

are

required

to

NELAP

requirements

are

noted

in

this

report.

All

exceptions

are

noted

per

laboratory

based

on

EPA

Method

1624c.

Pursuant

to

NELAP,

this

report

may

not

be

reproduced,

except

approval

of

the

laboratory.

Calculations

are

performed

before

rounding

to

avoid

round

-off

errors

in

calculated

results.

for

rounding.

Holding

times

were

met

for

all

samples

analyzed.

Proper

preservation

was

unless

otherwise

detailed

in

the

individual

sections

below.

RECEIPT/

STORAGE

The

samples

were

received

on

the

days

noted

in

the

report

for the

Month;

the

samples

properly

preserved

and

on

ice

when

necessary.

Samples

that

require

1,4-dioxane

analysis

are

preserved

vials

to

a

pH

of

≤2,

except

for

the

Pall

ozone

treatment

samples.

These

samples

when

mixed

with

the

HCI

acid,

cause

interferences

and

trap

damage.

Every

attempt

is

made

24

hours

of

receipt.

Samples

that

require

Bromate

analysis

are

collected

and

preserved

in

the

laboratory

and

refrigerated.

Sciences,

Inc.

Wagner

MI

in

the

analysis

of

the

quality

control

samples

were

to

achieve

the

lowest

or

analytes

present

at

relative

to

the

dilution

data

generated

by

PLS's

by

PLS's

procedures

described

in

with

the

laboratory

QA/QC

noted

Laboratory.

The

test

results

or

available.

Any

exceptions

standard

operating

procedure

in

full,

without

the

written

The

odd

even

rule

is

used

observed

on

all

samples

arrived

in

good

condition,

collected

in

hydrochloric

HCI

acid

-

have

chemicals

that,

to

analyze

these

samples

within

with

ethylene

di

-amine

The

barium

sample

was

taken

as

a

composite

sample,

preserved

with

nitric

acid,

and

refrigerated

before

and

after

being

sent

to

Ann

Arbor

Technical

Services

(ATS)

for

analysis.

This

sample

is

preserved

with

nitric

acid

and

refrigeration.

Samples

that

are

delivered

to

the

laboratory

the

same

day

as

they

are

collected

are

likely

not

to

have

reached

a

fully

chilled

temperature.

This

is

acceptable

as

long

as

there

is

evidence

that

chilling

has

begun.

All

samples

are

iced

or

refrigerated

at

4°C

(±2°C)

from

the

time

of

collection

until

sample

preparation

or

analysis.

1,4-Dioxane

(GC

-MS)

All

ground

water

and

treated

water

samples

were

analyzed

for

1,4-Dioxane

(GC

-MS)

in

accordance

with

EPA

1624C,

which

has

been

modified

to

enhance

detection

limits.

Samples

that

were

diluted

to

bring

them

within

the

calibrated

range

of

the

instrument

are

noted

with

a

"D"

under

the

Qualifier

Code

section

of

the

data

report.

Reporting

limits

were

adjusted

based

on

each

dilution.

Reporting

limit

for

undiluted

samples

is

1ppb

(part

per

billion,

micrograms

per

liter,

µg/L).

All

quality

control

parameters

were

within

the

acceptance

limits

for

reported

samples

unless

indicated.

April

2021

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