interim sampling and analysis plan ground water

INTERIM SAMPLING AND ANALYSIS PLAN

FOR MARCH 1990 QUARTERLY SAMPLING

AT THE

GROUND WATER CONTAMINATION SITE

Hastings Nebraska

March 1990

Work Assignment No v2 7L52

Prepared by

MK Environmental Services

1120 Lincoln Street

Denver, Colorado 80203

2013518

HAR89j4

Interim Sampling and Analysis PlanGround Water Contamination Site

Hastings Nebraska

APPROVED

C l a r F j u d y / ' j f DateMK EnvironmentalSue Manager

?1? .̂) 0Date

MK Environmental Services IncDirector of Health fend Safety

/Steve Schuermann DateMK Environmental Services IncQuality Assurance Manager

Charles P Hensley DateEPA Region VIIRegional Quality Assurance Officer

/.Darrell Sommerhauser DateEPA Region VIIRemedial Project Manager

HAR89.0

TABLE OF CONTENTS

INTRODUCTIONSection 10

Page

1

OBJECTIVES OF SAMPLING EFFORTSection 2.0

DATA USAGE AND DATA QUALITY OBJECTIVESSection 3 0

GROUND WATER SAMPLINGSection 4 0

SCHEDULE OF TASKSSection 5 0

ATTACHMENT A

ATTACHMENT B

24

25

28

ATTACHMENT C

ATTACHMENT D

31

33

HAR89j6

LIST OF TABLES

Table Page,

1 Data Quality Objectives 7

Ground Water Sampling Parameters 14March 1990 Quarterly SamplingActivity No CS5S2



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LIST OF FIGURES

'igure fage

1 Subsite Locations 2

2 Well Locations Colorado Avenue 10

3 Well Locations FAR MAR CO 11

4 Well Locations N Landfill & FAR MAR CO 12

5 Well Locations #3 Area 13

6 GW Sample Description Log 19

7 OVA Calibration Worksheet 20

8 PH Meter Calibration Worksheet 21

9 EC Meter Calibration Worksheet 22

10 Training Attendance Record 23

IIAR8938

INTRODUCTION

Section 10

In a continuing effort to support the Remedial Investigation and Feasibility Study (RI/FS) and Remedial

Design (RD) of the Hastings Ground Water Contamination Site the U S EPA (EPA) has established

Alternative Remedial Contracts Strategy Program (ARCS) to provide contractor oversight The ARCS

contractor has acquired site responsibilities that were established under the REM IV contract held by CH2M

Hill and administered by Planning Research Corporation (PRC)

This Hastings RI includes performance of quarterly ground water sampling and analysis MK Environmental

Services Inc. (MK) under the ARCS contract will be performing the March 1990 quarterly ground water

sampling activities at the Ground Water Contamination Site Hastings Nebraska (Figure 1) This Interim

Sampling and Analysis Plan describes the project objectives data usage data quality objectives (DQOs) and

ground water sampling parameters The contents of this Sampling and Analysis Plan to that information

which is essential to completing the sampling effort Site description site history and standard operating

procedures (SOPs) are outlined in documents referenced below They will serve as operational guidelines

only for the March sampling event Decontamination procedures are also outlined in the MK site specific

Health and Safety Plan

Applicable existing documents are

Work Plan Remedial Investigation and Feasibility Study Hastings Ground Water Contamination

Site October 9 1985

Project Operations Plan (POP) Ground Water Investigation Ground Water Investigation Site

Hastings Nebraska May 12, 1986 and June 12 1986

Addendum A to the POP August 14 1986

Addendum B to the POP November 20 1986 and

1

HAR89j9

NUMBER 3 SUBSITEHASTINGS GROUND WATER CONTAUINATKN Sit

HASTINGS NEBRASKA

FIGURE 1SUBSITE LOCATIONS

PRC ENVIRONMENTAL MANAGEMENT INCL.

Alternative Remedial Contracts Strategy Program Regions VI VII and VIII Draft Quality

Assurance Project Plan May 12, 1989

Health and Safety Plan for Ground Water Sampling at the Ground Water Contamination Site

Hastings Nebraska MK, February 1990

Uncontrolled Hazardous Waste Site Investigation Manual CDM

Data Quality Objectives for Remedial Response Activities Development Process EPA/540/G

87/003 March 1987

HAR8941 '

OBJECTIVES OF SAMPLING EFFORT

Section 2.0

2.1 Project Scope

Ground Water samples will be collected from a network of existing monitoring and water supply

wells to continue the quanerly sampling program established by Woodward Clyde Consultants and

Camp Dresser & McKee (CDM) under REM II contracts in October 1985 Quarterly water quality

information obtained is pertinent to the following subsites within the Hastings site the Colorado

Avenue subsite the Far Mar Co subsite Well No 3 Second Street, and the North Landfill subsite

Data tracking data validation, and data reduction activities are not included within the scope of this

plan Data tracking and data validation will be handled by EPA Region VH Environmental Services

Division Data reduction will be pan of an as yet unassigned task.

2.2 Purpose

The purpose of the quanerly sampling is to funher define the nature and extent of ground water

contamination Plume definition includes delineating vertical and horizontal plume boundaries

relationship of plumes to each subsite vertical distribution patterns and seasonal fluctuation

HAR8942

DATA USAGE AND DATA QUALITY OBJECTIVES

Section 3 0

3 1 Data Usage

Analytical data which is of sufficient quality and representativeness will be integrated into the

Hastings Site evaluation It will provide continuity to the analytical database and further refine the

nature and extent of ground water contamination Data will facilitate in the formulation and

selection of recommended remedial alternatives which may mitigate human and environmental

exposure to contamination

3 2 Data Quality Objectives

Data qualiq^pbjects (DQOs) should be designed to maximize data quality and utility while observing

financial and schedule constraints DQOs need to be periodically reevaluated by EPA Remedial

Project Managers (RPMs) and ARCS contractor personnel to determine if the acquired analytical

data meets present and potential future data usage standards

This intenm SAP addresses DQOs to the extent that they were established by the RPM for the

March quarterly sampling (see Table 1) and in a generic sense by referencing the Alternate Remedial

Contracts Strategy Program Regions VI VII and VIII Draft Quality Assurance Project Plan (May

12 1989) and Data Quality Objectives for Remedial Response Activities Development Process

(March 1987)

Quality control samples will consist of duplicates trip blanks field blanks and equipment blanks

Duplicate samples consist of collecting two entire sets of samples from one sampling point to obtain

a measure of precision obtainable from field methods used to collect samples If bailers are used

to collect samples duplicates will be collected from a separate bailer than the original sample

HAR894j

Trip blanks are sample vials filled with clean laboratory water which are capped by the laboratory

retaining no beadspace These vjals are sent to the field and are placed in coolers along with

HAR8944

TABLE 1DATA QUALITY OBJECTIVES

Parameter

Volatile Organic*

Volatile Organlcs

EOB"

EOB

SampleHatrln

Water

Water

Water

Water

DetectionLimit*

5ppb

1 PPb

20 ppt

1 ppb

Completeness/*CriticalDate Points

90t

90X

90X

90X

Huiberof

Sairplet

35

16

11

6

Quality ControlDuplicates

I

2

2

1

SamplesBlanks

•

3

4

2

TotalSanplcs

48

21

17

9

a ppb • parts per billion ppt » parts per trillion

b EM - Ethylene dlbromlde

c Sampling efficiencies will be wet except In thote cases where Insufficient budget provisions have precluded tlmly acquisition of ttcInoperable sampling equipment

to replace

73oo

collected samples Tnp blanks are then sent to the laboratory with field water samples for analysis

Trip blank analyses determine whether resultant sample concentrations were altered due to cross

contamination dunng handling shipment or analysis

' like tnp blanks contain only clean laboratory water However the vials are opened

in the sampling environment for a time equivalent to that which actual sample vials are opened

The field blank vials are topped off with dean laboratory water and capped again excluding air

bubbles They are then analyzed along with the field samples to determine whether contaminants

may have been introduced to ground water samples from ambient sources other than the

groundwater itself

Equipment blanks are collected by pouring clean laboratory water into sample collection vessels after

they have been decontaminated post sampling The water is then poured from the sampling vessel

into glass vials the vials are topped off with the same nnsate water capped and sent to the

laboratory for analysis Equipment blank (nnsate blank) analyses indicate whether decontamination

procedures were sufficient.

3 3 Quality Assurance Surveillance

To assure field data collected is of high quality an on site Quality Assurance Technician will

perform quality assurance checkpoints on approximately 10 percent of the wells sampled Corrective

actions if appropriate will be initiated immediately in the field and noted on the checklist sheets

The QA Surveillance Checklist is included as Attachment A. The results of these field surveillance

checks will be reported to the MK Quality Assurance Manager

HAR8946 -

WELL LOCATIONS WELL »3 AREA

M-6

73oo•O

900 FEETJULY 1989

•A- OW 0 SHALLOW AND HDEEP OBSERVATION WELLS

-£- CW t, MW 12, SHALLOW^ MOMTORINQ WELLS

&- HW 23, MONITORINQWELL SCREENEDFULL DEPTH

-4- MHO CITY WELL^ M-l DECOI088IONEO

FIGURE 2 WELL LOCATIONS (from ERA drawing)

WELL LOCATIONS COLORADO AVENUE

00^o-fc.oo

J]1THIRD ST

SECOND ST

0,- MW-1I

2 LJI_ILJ

B STREET

OW 5, SHALLOW ANDDEEP OBSERVATION WELLS

MW 6, SHALLOWMONITORING WELL

& MW 22, BW-1MONITORING WELLSCREENED FULL DEPTH

MW-13 INTERMEDIATEDEPTH MONITORING WELL

M 10, CITY WELLM 3, M 18. DECOMI88IONED

•tAUGUST ItSt

FIGURE 3 WELL L O C A T I O N S ( f rom ERA d r a w i n g )

oo

WELL LOCATIONSNORTH LANDFILL

-A- MW 6 SHALLOWMOWTORINQ WELL

MW-24 UONrrORINQ WELLSCREENED FULL DEPTH

MW-17 INTERMEDIATEDEPTH MOMTORINO WELL

OW 2, SHALLOW ANDDEEP OBSERVATION WELLS

4- D-S, DOMESTIC WELLM-12, CITY WELL

FIGURE 4 WELL LOCATIONS (drawing from ERA)

WELL LOCATIONSFAR-MAR-CO

Burlington Northern RR

BYPASSROAD

H W Y U S G

D-8

LEGEND

oo*oty>O

4- D-8 DOUE8TKWELL

4- M-tt.CIM-24, PUBLIC SUPPLY WELLS

4- M9, mmOATTON WELL

+ M-9 MDUSTMAL WELL 0 200 400 tOOrttrOacamber 1989

MW-28

LEGENDMW 8, SHALLOW

MONITORMQ WELL

MW-18 MTERUEDIA-n!verm HOMTORMO WELL

MW-17 MONITORMQ WELLSCREENED PULL DBPTH

CMS-24

I-46

FIGURE 5 WILL LOCATIONS (from ERA drawing)

TABLE 2GROUND WATER SAMPLING PARAMETERS

MARCH 1990 QUARTERLY SAMPLING

ACTIVITY NO CSSS2

Sample Location VOA (I ppb'1 EPS (20 pptblM20 Xe

NE City System XSE City System XM7 XD"M6 XM9 XM 11 XCMS 19 X XCMS System XF* XCMS 24 X_ X

Sample Subtotal 10 3

Duplicates 1 0Trip Blanks 1 1Field Blanks _2r QQA Subtotal 4 1

Total Samples 14 4

• ppb = Parts per billion, VOA = Volatile Organic Analysesb ppt = Parts per trillion EDB = Ethylene dibromidec X = One sample will be collectedd D = Duplicate sample will be collected• F = Field blank will be collectedr 2 = Indicates multiple samples will be collected

HAR8931

TABLES

GROUND WATER SAMPLING PARAMETERSMARCH 1990 QUARTERLY SAMPLING

ACTIVITY NO CS6S2

Sample Location VOA (5 ccb)* EDB (20 cct)b EDB tl cob)

OW 1S XDOW 10 ifO W 2 S x XOW 20 x XOU3S XFOW30 xOW 4S XOW 4D xCU 1 x

DU 1 X XMU 2 xHU3 xHU 4 x

HU5 xHU 6 x

HU 7 x

HU 9 xDd

HU 10 y.HU 11HU 12 jjHU 1 y

BU 1 £HU 19 y

HU 25 jf X

HU 14 XDF XDEHU 15 X XDEHU 16 X x

XI8 ——

Sample Total 3 3 2 6

Duplicates 4 1 1Trip Blanks 5 1 1Field Blanks 2 0 0Equip Blanks _2 i 1Q A Sample Total 1 3 3 3

Total Samples 4 6 5 9

* ppb = Parts per billion VOA * Volatile Organic Analysesppt Parts per trillion EDB Ethylene dibromide

c X = One sample will be collectedd D Duplicate sample will be collected' F Field blank w i l l be collected2 « Indicates multiple camples will be collected

* E Equipment blank will be collected

Note HW 25 will be campled from the following depths 125 ft to 130 ft 130 ft to 135 ft and 135 ftto 140 ft

HAR8952

TABLE 4GROUND WATER SAMPLING PARAMETERS

MARCH 1990 QUARTERLY SAMPLING

ACTIVITY NO CS7S2

Sample LocationMW27MW28

Sample Subtotal

DuplicateTrip BlanksField Blanks

Total Samples

VGA fl ppbV3P3_d

6

0112

8

EDB (20 pptV33_6

0102

8

8 ppb = Parts per billion, VOA = Volatile Organic Analysesb ppt = Parts per trillion EDB = Ethylene dibromide

F = Field blank will be collectedd 2 = Indicates multiple samples will be collected

NOTE MW 27 and MW 28, installed under EPA REM IV contract, contain dedicatedinterval sampling pumps with permanent packers in place to isolate the sampling intervals

MW 27 will be sampled from the following depths 120 ft, 150 ft, and 200 ft

MW 28 will be sampled from the following depths 120 ft, 150 ft, and 200 ft

HAR895J

to 4° C They will be express mailed to the CLP laboratory(ies) directly from the field location

Holding times for all VOCs is 14 days except for aromatics which are 7 days The holding time

for EDB is 14 days

4 3 SAMPLE COLLECTION PROCEDURES

Ground Water will be collected after purging the well sampling intervals ofeUbr&TcasmE volumes

where appropriate Specific conductivity pH and temperature of ground water will be measured

on initial purge water as well as after each casing volume to insure that the parameters have

stabilized sufficiently prior to sampling Purge water will be immediately run through the carbon

filtration unit and then discharged to the ground surface Municipal water supply taps will be

allowed to run prior to sampling in order to obtain a representative sample Samples will all be

collected from low pressure outlets (pump outlet ports bailers or taps) to prevent volatilization of

an> contaminants during sample acquisition Sample description logs will be filled out for each

sample to document field procedures (Figure 6) These records will be maintained in the project

file More detailed sampling procedures are outlined in Attachment B and C

Each sampling team will utilize an organic vapor analyzer (OVA) at each sampling site to determine

the appropriate level of personal protective equipment that should be utilized OVA readings will

be taken and recorded upon arrival at the sampling site during purging and during sampling OVA

calibration is described in the MK Site Health and Safety Plan OVAs will be calibrated daily and

results will be recorded on the worksheet shown in Figure 7 Figures 8 and 9 outline calibration

procedures for pH and EC meters respectively

Prior to initiating the quarterly sampling event the Task Supervisor and Site Health and Safety

Officer will bnef the field team members on specific field operation procedures and the Health and

17

I1AR8954

Safety Plan to ensure they are well informed of critical matters This training will be documented

on the Training Attendance Record shown in Figure 10

18

HAR895D

FIGURE 6

GROUND WATER

Wpll number

S«mpl0 |[) NO .

Groundweter Q pieifl blankRinsete | ) Tnp blank

Dupe 1~| Other

A naluaes requested

VDC (5 ppb) - 2 vials ———VDC (1 ppb) -4 vials ———EDB (20 ppt) -^TvfnYT ——EDB(1 ppb) -2 vials ———

Well purging technique

SAMPLE

DDD

DDDDDD

DESCRIPTION LOG

Tlmo

Prnjjrum

Depth Tromtopof v?ll wslngTf>pnfwMi»r

Top eempling Intprvol _. .. „

fintlnmof well

Well din inrhpc

V = 0 0408 X H X D 2

Sampling technique

Field Dote pH ecrw scPu sr

pH , , SC

Other

Sampler's Signature

T.mp OVA

Tnmp , nVA

Temp ., PVA

Tpmp n\/A

Notes/Info (sample tplit collected veil /pump conditions specific anal gtical di rections etc)

,

HAR8956

FIGURE 7

OVA CALIBRATION WORKSHEET

Project _______________ Dot* ,

OVA senol No ___________ Time

Calibrated to _____ with ______________ gas at a concentration of———————— ppm In air Span setting after calibration of ___________

Hydrogen gas tank pressure of _____________

Battery adequately recharged yes __ no __

Signature of responsible person ________________

Project —————————————— Dele

OVA serial No __________ Time

Calibrated to ————— with ______________ gas at a concentration of________ ppm in air Span setting after calibration of __________

Hydrogen gas tank pressure of —————————————

Battery adequately recharged yes __ no ——

Signature of responsible person ————————————————

Project _______________ Date

OVA eenel No ___________ Time

Calibrated to ______ with _______________ gas et o concentration of

——————— ppm 1n air Span setting after calibration of ——————————Hydrogen gas tank pressure of ______________

Battery adequately recharged yes __ no _

Signature of responsible person

HAR8957

FIGURE 8

pH METER CALIBRATION WORKSHEET

Project ____________ Dote ,Meter ID number _______ Time

pH 7 buffer calibration _____ temperature of buffer (deg C)pH ——— buffer calibration _____ temperature of buffer ——Notes _______________________ Initials

Project ____________ Date ,Meter ID number _______ Time

pH 7 buffer calibration _____ temperature of buffer (fleg C)pH __ buffer calibration ____ temperature of buffer __Notes _______________________ Initials

Project ____________ DateMeter ID numt>er _______ Time

pH 7 buffer calibration _____ temperature of buffer (deg C)pH __ buffer calibration ____ temperature of buffer ——Notes _______________________ Initials

Project _____________ Date

Meter ID number ________ Time

pH 7 buffer calibration _____ temperature of buffer (deg C)pH —— buffer calibration ————— temperature of buffer __Notes _____________________ Initials

HAR8958

FIGURE 9

CALIBRATION WORKSHEET

EC KETER

DATE TIME 0 0 IN XC1 TEMP OF INITIALS_______________CALIBRATION? KCl SOLN(~CJ_____OF ANALYST

C2

11AR8959

FIGURE 10

'KNUDSEN Training Attendance Record

IUm«

HAR8960

SCHEDULE OF TASKS

Section 50

Ground water sampling has been tentatively scheduled for the week of March 11 1990 Samples collected

will be shipped daily to the appropriate CLP laboratory for analysis Cham-of-custody procedures will be

adhered to strictly Alterations in schedule and/or sampling activities will be approved by the Region VII

RPM prior to their execution

24

HAR8961

ATTACHMENT A

QUALITY ASSURANCE SURVEILLANCECHECKLIST

ACTIVITY GROUNDWATER SAMPLING AT HASTINGS. NETASK March 1990 Quarterly Sampling

WELL NO

DATE _____Pg No 1 of 3

CHECKPOINTS YES N_0 COMMENTS

1 Task Supervisor onsue

2 SOP onsite

3 Equipment present

Water level detection device

Bailers

Carbon Filtration unit

4 Health and Safety instrumentscalibrated and results recorded

5 Fill out the sample labelsattach to the proper containers

QA TECHNICIAN

25

HAR8962


ACTIVITY GROUNDWATER SAMPLING AT HASTINGS. NE DATE _____TASK March 1990 Quarterly Sampling Pg No 2 of 3

CHECKPOINTS YES NO COMMENTS

6 pH EC instrumentscalibrated and recorded

Record the depth on the wellvolume worksheet as D^Calculate well casing volume

Collect a groundwater samplefor everj' casing volume totake and record temperature pHand EC readings

Purge the well an equivalentof three casing volumes ascalculated on Well Volumeworksheet or until wellbecomes dry

QA TECHNICIAN

26-

HAR896:


ACTIVITY GROUNDWATER SAMPLING AT HASTINGS. NE DATE _____TASK March 1990 Quarterly Sampling Pg No 3 of 3

CHECKPOINTS YES NO COMMENTS

10 Slowly raise the bailer to the surface Donot allow the rope to come in contact with theground or decrease purge water volume of pump toreduce volatilization rate during sampling _

11 Collect the samples in thefollowing order

Volatile organicsEthylene dibromide

12 Place the sample into the proper containers _ _

13 After sample has been collectedimmediately place it into a 4°C cooler

14 Enter sample date/time in field log _ _

15 Fill out sample log sheet

16 Unattended ice chests sealed by custody seal

QA TECHNICIAN

27

HAR8964

ATTACHMENT B

GROUND WATER SAMPLING PROCEDURES

The procedures that will be used to collect ground water samples with the submersible pump include thefollowing steps

A. Check the well for above ground damage

B Remove the well cap

C Take and record OVA/HNu readings for background at the well head and in the breathing zone Makeappropriate adjustments to level of Health and Safety protection if any

D Prior to sampling measure and record from the top of the well inner casing the casing diameter (D)(ft) ^egtlnb" water (ft) and calculate the height (H) of water column (ft) to be purged for each casingvolume Calculate the total volume (gallons) of water to be purged from the well (approximately 3casing volumes)

E Attach previously decontaminated stainless steel security cable securely to pump

F Lower the pump assembly to the prespecified depth

G Record time and start pump Monitor water column height to ensure that the intake remains belowthe top of the water column Take an OVA/HNu reading and record it Make appropriate adjustmentsto level of Health and Safety protection if any

H Purge the well by removing the equivalent of Ifcfee sampling interval well volumes of water After eachwell volume is removed a grab sample may be obtained for temperature pH and specific conductivitymeasurements The exact amount of purging will be determined in the field on the basis ofgeological and/or hydrological conditions and on well construction detail Water purged from the wellswill be passed through a carbon filtration unit prior to discharging to the ground surface Rinse pHand EC meters with deiomzed water after each use

I Remove the pump assembly from the well insuring that no sampling materials touch the ground

J Rinse the submersible pump with clean laboratory water Collect initial nnsate and run it through thecarbon filtration unit before discharging it to the ground surface Complete decontamination by applyinghigh temperature high pressure water spray to all portions of the pump Similarly decontaminate thetubing and reel which come in contact with contaminated ground water All decontaminated equipmentmust be stored on clean polyethylene sheeting and should not touch the ground

K. Remove a decontaminated Teflon or stainless steel bailer and check valve from the wrapping

28

HAR8965

L. Attach nylon or polypropylene line securely to bailer and lower the bailer slowly into the water columnCarefully raise the bailer to the surface after allowing it to slowly fill Care will be taken to ensurethat the line and bailer do not touch the ground Carefully raise the bailer to the surface after allowingit to slowly fill

M The first bailer of water will be used to fill the VOA vials Fill the VOA vials such that a xmniscusis formed on the vial neck and carefully cap the bottle Tip the bottle upside down and inspect for airbubbles Should noticeable air bubbles appear the process will be repeated until an air free sample isobtained The transfer of the sample from the bailer to the container will be performed in a mannerthat will limit the amount of water agitation in order to reduce the loss of volatile organics from thesample Label all vials with pre pnnted sample labels Place vials into a plastic cubitainer with a carbonthimble and label cubitainer

N Subsequent bails will be used to fill the EDB sample vials Similar procedures should be performed tocollect EDB samples as were used for VOA samples

O Carefully log and package all sample bottles in their respective coolers add ice and packaging materialas necessary and seal for shipment

P Lock the wells (if appropriate)

Q Rinse the bailer with clean laboratory water Collect initial nnsate and run it through the carbonfiltration unit before discharging it to the ground surface Complete decontamination by applying hightemperate high pressure water spray to all portions of the bailer Decontaminate gloves boots andclothing when appropriate in a similar manner

R Dispose of gloves (if appropriate) polyethylene sheet and bailer line in plastic bag and label bags assampling waste

S The following information will be recorded on the sampling log form

Date/Time

Well number

Sample number

Total depth of well

Evacuated volume

Any visible well damage

pH temperature and EC readings

H2O level before purging

29

HAR8966

Time end purge

Sample time

Sample preservation method

Others as required

30

HAR8967

ATTACHMENT C

The procedures that will be used to collect ground water samples with dedicated bladder pumps with andwithout an air displacement pump include the following steps

A. Check the well for above ground damage



D Prior to sampling measure and record from the top of the well inner casing the casing diameter (D)(ft) depth to water (ft) and calculate the height (H) of water column (ft) to be purged for each casingvolume Calculate the total volume (gallons) of water to be purged from the well (approximately 3casing volumes)

E Inflate packers (if appropriate) record time and start pump Take OVA/HNu readings on purge water

F If a dedicated air displacement pump has been installed in conjunction with the dedicated bladder pumppurge the well with the air displacement pump and take samples with the bladder pump Purge the wellby removing the equivalent of three sampling interval well volumes of water After each well volumeis removed a grab sample may be obtained for temperature pH and specific conductivity measurementsThe exact amount of purging will be determined in the field on the basis of geological and/orhydrological conditions and on well construction detail Water purged from the wells will be passedthrough a carbon filtration unit prior to discharging to the ground surface Rinse pH and EC meterswith deionized water after each use

G Reduce pumping rate to a level that will minimize volatilization

H Fill the VOA vials and then the EDB vials such that a miniscus is formed on the neck of the vial andcarefully cap the bottle Tip the bottle upside down and inspect for air bubbles Should noticeableair bubbles appear repeat the process until an air free sample is obtained

I Carefully log and package all sample bottles in their respective coolers add ice and packaging materialas necessary and seal for shipment

J Lock the wells (if appropriate)

K. Dispose of gloves (if appropriate) and polyethylene sheet in plastic bag and label bags as sampling waste,Wash gloves boots and other applicable personal protective equipment with Alconox wash and nnsewith deionized water

31

HAR8968

L. The following information will be recorded on the sampling log form

Date/Time

Well number

Sample number

Total depth of well

Evacuated volume

Any visable well damage

pH temperature and EC readings

H2O level before purging

Time begin purge

Time end purge

Sample time

Sample preservation method

Others as required

M If multiple intervals are to be sampled within a single well switch to new sampling ports and repeat stepsE through L. Repeat for each additional sampling interval _

32

HAR8969

ATTACHMENT D

The procedures that will be used to collect ground water samples with the interval sampling pump include

the following steps

A. Check well for above ground damage



D Pnor to sampling measure and record from the top of the well inner casing diameter (D) (ft) depthto water (ft) and calculate the height (H) of water column to be purged for each casing volume (i edistance between packers) Calculate the total volume of water to be purged from the well(approximately 3 packer interval volumes)

E Lower interval sampler to deepest target interval Inflate packers record time and start pump TakeOVA/HNu readings on purge water

F Purge the well by removing the equivalent of three sampling interval well volumes of water After eachwell volume is removed a grab sample may be obtained for temperature pH and specific conductivitymeasurements The exact amount of purging will be determined in the field on the basis of geologicaland/or hydrological conditions and on well construction detail Water purged from the wells will bepassed through a carbon filtration unit prior to discharging to the ground surface Rinse pH and ECmeters with deiomzed water after each use

G Reduce pumping rate to a level that will minimize volatilization

H Fill the VOA vials and then the EDB vials such that a miniscus is formed on the neck of the vial andcarefully cap the bottle Tip the bottle upside down and inspect for air bubbles Should noticeableair bubbles appear repeat the process until an air free sample is obtained

I Deflate packers Raise interval sampler to second deepest sampling interval Inflate packers recordtime and start pump Take OVA/HNu readings on purge water

33

HAR8970

J Purge the well by removing the equivalent of three sampling interval well volumes of water After eachwell volume is removed a grab sample may be obtained for temperature pH and specific conductivitymeasurements The exact amount of purging will be determined in the field on the basis of geologicaland/or hydrological conditions and on well construction detail Water purged from the wells will bepassed through a carbon filtration unit prior to discharging to the ground surface Rinse pH and ECmeters with deionized water after each use

K. Reduce pumping rate to a level that will minimize volatilization,

L. Fill the VOA vials and then the EDB vials such that a mimscus is formed on the neck of the vial andcarefully cap the bottle Tip the bottle upside down and inspect for air bubbles Should noticeableair bubbles appear repeat the process until an air free sample is obtained

\M Repeat this process for each additional target interval

N Carefully log and package all sample bottles in their respective coolers add ice and packaging materialas necessary and seal for shipment

O Lock the wells (if appropriate)

P Remove the interval sampler from the well Place tubing reel and sampler in a large tubDecontaminate by applying high temperature high pressure water spray to all portions of the samplingequipment Pump nnsate water through the carbon filtration unit prior to discharging it to the groundsurface Decontaminate gloves boots and clothing when appropriate in a similar manner

Q Dispose of expendable materials in a plastic bag and label bags as sampling waste

34IIAR8971

interim sampling and analysis plan ground water

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