Ground Water Classification Test Field Procedure … water classification test field procedure (yield test) north cavalcade street superfund site, houston, texas ncra_tm-gwclassificationprocedure_2011-0401.docx

NCRA_TM-GWCLASSIFICATIONPROCEDURE_2011-0401.DOCX 1

T E C H N I C A L M E M O R A N D U M

Ground Water Classification Test Field Procedure (Yield Test) North Cavalcade Street Superfund Site, Houston, Texas PREPARED FOR: Camille Hueni/EPA Region 6 RPM

PREPARED BY: CH2M HILL

DATE: April 1, 2011 TASK ORDER: U. S. Environmental Protection Agency

Remedial Action Contract (RAC) EP-W-06-021 CH2M HILL Task Order Number 0047

DOCUMENT CONTROL NUMBER:

DCN 0047-02018

The purpose of this technical memorandum (TM) is to specify the procedures for completing well yield tests at four monitor wells completed in the water-bearing interbedded zone at the North Cavalcade Street Superfund Site. Well yield testing will be performed to determine the proper ground water classification for the interbedded zone in accordance with the categories specified by the Texas Risk Reduction Program (TRRP). The procedures outlined in this TM are derived from the Texas Commission on Environmental Quality (TCEQ) regulatory guidance document Groundwater Classification (RG-366/TRRP-8, revised March 2010). This version of this TM incorporates EPA comments received March 31, 2011.

Background The well testing data and limited water quality data included in the report entitled “Analysis of CPT/ROST and Well Testing Data” (Kordzi, 1999) suggests that the shallow aquifer and interbedded zone ground water could likely meet the requirements to be considered a Class 2 Ground Water Resource. As noted in the Focused Feasibility Study, however, additional aquifer testing and water quality data would be required to determine definitively whether the water should be considered a Class 2 Ground Water Resource (CH2M HILL, 2008). Well yield tests will be performed, therefore, to confirm whether the interbedded zone in particular should be considered a Class 2 or Class 3 ground water resource under the TRRP specifications. The interbedded zone will most likely remain a Class 2 ground water resource after these tests, but it is expected the tests will demonstrate decreased sustained production in the interbedded zone from east to west, particularly in the offsite downgradient area.

Testing Locations Well yield tests will be performed at four monitoring wells in a line roughly east-west across the site. The wells will be tested to determine the ground water classification of the interbedded zone and to assess whether or not the classification changes across the site. The

003097

GROUND WATER CLASSIFICATION TEST FIELD PROCEDURE (YIELD TEST) NORTH CAVALCADE STREET SUPERFUND SITE, HOUSTON, TEXAS


four wells to be tested are MW-30I, MW-42I, MW-47I, and MW-52I. The locations of these four wells are marked (with red circles) on the attached Figure 1. Recent field forms for each well from the November/ December 2010 well installation and sampling program, including draft well construction diagrams, draft soil boring logs, well development logs, and well purge and sampling field data sheets , are provided as Attachment A to this TM.

Test Procedures The well yield test method to be utilized is identified as Method 2a: Well Yield by Cyclic Discharge in RG-366/TRRP-8. This method is primarily used to test well yield near the Class 2/Class 3 boundary in relatively low-yield ground water bearing units. Method 2a is a cyclic bail down – recovery test. The following procedures are specified from RG-366/TRRP-8 for Method 2a:

1. The monitor well must be fully-penetrating of the ground water zone, have a minimum diameter of 2 inches, and be constructed consistent with the requirements of 16 Texas Administrative Code (TAC) §76.1000-76.1009.

2. Measure the static water level in the well and total well depth. Calculate the water column height in the well, and then determine the depth-to-water level measurement that represents 90% of the initial height of the water column in the well.

3. Using a bailer or a pump, evacuate all water from the well. Record the volume of water removed (to within the nearest 0.1 gallon). Measure the static water level and the time at which the well went dry (for confirmation) immediately upon completion of water removal.

4. Monitor recovery of the water level in the well. Also, record the time of water level measurements during the recovery period as an elapsed time (in minutes/seconds) from the initial time measurement of the completion of water removal. Continue monitoring water level recovery in the well up to the point at which the water level recovers to a specified level that is no greater than 90% of the height of the initial static water level (recorded in Step 2).

5. Immediately upon recovery of the water level in the well to the specified level (not greater than 90% of the initial static water level), repeat steps 3 and 4 twice. This method requires a minimum of three bail-down/recovery cycles to complete the well yield test calculations.

6. After the third recovery period, evacuate all the water from the well a fourth time and record the volume of water removed. A sample for Total Dissolved Solids (TDS) will be collected from the water removed during the fourth bail-down/removal cycle. The testing is now completed.

At the end of testing, ensure that the total volume of water removed is recorded. Ensure that complete and accurate records of the testing are kept in the field logbook. The water level data, recovery time, and volume of water removed from the well are necessary to determine the well yield and ground water classification.

003098

GROUND WATER CLASSIFICATION TEST FIELD PROCEDURE (YIELD TEST) NORTH CAVALCADE STREET SUPERFUND SITE, HOUSTON, TEXAS


Works Cited CH2M HILL, 2008. Focused Feasibility Study Report. North Cavalcade Street Superfund Site, Houston, Texas. Prepared for the U. S. Environmental Protection Agency under Remedial Action Contract No. EP-W-06-021, Task Order No. 0015-RIFS-0678. June 2008.

Joe Kordzi, Charles D. Abshire and Ken Johnson (Kordzi), 1999. Analysis of CPT/ROST and Well Testing Data Acquired at the North Cavalcade Superfund Site. January 5, 1999.

003099

Cavalcade St

Har

dy S

t

Elys

ian

St

Moody St

Approximate Location ofPecore Fault Line

MW-28IBenzene - 6.9Naphthalene - 553

MW-55IBenzene - 4.3 JNaphthalene - 2420

MW-29IBenzene - 155Naphthalene - 9870



MW-40IBenzene - 0.5 U

Naphthalene - 1.4 J

MW-43IBenzene - 32.9Naphthalene - 11100 JL


MW-41IBenzene - 3.4

Naphthalene - 49.4

MW-60IBenzene - 11

Naphthalene - 4510MW-56I

Benzene - 281Naphthalene - 10300

MW-36IBenzene - 0.5 UNaphthalene - 7.7



MW-58IBenzene - 76

Naphthalene - 10300



MW-32IBenzene - 0.5 UNaphthalene - 2180

MW-31IBenzene - 0.5 UNaphthalene - 4.4 J


MW-38IBenzene - 4.9

Naphthalene - 2720






MW-50IBenzene - 0.5 U

Naphthalene - 5.4

MW-49IBenzene - 0.5 UNaphthalene - 0.65 U




MW-45IBenzene - 0.5 UNaphthalene - 2.7 J

FIGURE 2-7Dissolved Benzene Naphthalene in theInterbedded Sand (December 2010)North Cavalcade Superfund SiteRemedial DesignHouston, Harris County, Texas

0 150 300

Approximate scale in feet

NOTES:U - Not detected at reported quantitation limitJ - Estimated valueL - Reported concentration is below the reported quantitation limitNaphthalene and Benzene concentrations in micrograms per liter (ug/L)

Monitoring WellApproximate Extent of NAPL Product in the Shallow Sand (2004 Data)Approximate Extent of Residual Product in the Shallow Sand (2004 Data)In-Situ Stabilization Areas

\\HOLLISTER\PROJ\CAVALCADE\MAPFILES\RESULTS_BENZENE-NAPHTHALENE_INTERBEDDED_RA_WELLS.MXD GTWIGG 2/14/2011 12:57:32

LEGEND

003100

ddavis9

Oval

ddavis9

Oval

ddavis9

Oval

ddavis9

Oval

mohare

Text Box

Figure 1 Yield Test Locations

Attachment A

Well Completion Diagrams, Soil Boring Logs, Development Logs & Purge Forms

003101

20.7 ft BTOC, 18.0 ft BGS TOP OF BENTONITE SEAL

26.7 ft BTOC, 24.0 ft BGS TOP OF FILTER PACK

38.7 ft BTOC, 36.0 ft BGS BOTTOM OF BOREHOLE

26.1 ft BTOC, 23.3 ft BGS



North Cavalcade Superfund Site RA

Carrie Wallestad/DFW

Gainco Drilling, Driller: Stas Grover

3126267.33

MW30I

11/30/2010

51.71 ft

48.97 ft

13857994.84

HSA B61, 8-in OD x 4 1/4-in ID auger

Sch 40 PVC

2-in (ID)

slotted PVC

0.01-in

20/40 Sand

6 50-lb bags

3/8" Bentonite Chips

1 50-lb bag

8-in


TOP OF CASING

PORTLAND CEMENT GROUT

STICK-UP MONUMENT

WELL DIAGRAM IS NOT TO SCALE

NOTES:ALL DEPTHS ARE REPORTED AS FEETBELOW TOP OF CASING (ft BTOC), FEETBELOW GROUND SURFACE (ft BGS).

BOTTOM OF WELL CASING

BOTTOM OF SCREEN

TOP OF SCREEN

Houston, Texas

PROJECT NUMBER: BORING NUMBER:

WELL COMPLETION DIAGRAM

LOCATION:PROJECT:

STATIC WATER LEVEL:

LOGGED BY:

DRILLING METHOD:

FINISH:GROUND ELEVATION (NGVD29):

TOP OF CASING ELEVATION (NGVD29): NORTHING (NAD83 Z 20):

DRILLING CONTRACTOR:

11/30/2010START:

EASTING (NAD83 Z 20):

406762

10.29 ft BTOC (12/14/2010)

WELL CONSTRUCTION DETAILS

CASING MATERIAL:

CASING DIAMETER:

SCREEN TYPE:

SLOT SIZE:

FILTER PACK TYPE:

FILTER PACK QTY:

SEAL TYPE:

SEAL QTY:

BOREHOLE DIAMETER:

BOREHOLE DEPTH:

003102

Borehole advanced usingDirect Push Technology to 20ft bgs, followed by Hollow-Stem Auger drilling to 36 ftbgs.

SILTY CLAY (CL)dry, grayish brown (10YR 4/2), medium plasticity,stiff

SANDY CLAY with SILT (CL)dry, grayish brown (10YR 5/2), medium plasticity,stiffcolor grades to light gray (10YR 7/1) with brownishyellow mottling (10YR 6/6) at 9 ft bgs

CLAYEY SAND (SC)moist, light gray (10YR 7/1) to yellow (10YR 7/6),very fine grained, softSAND (SP)moist, light gray (10YR 7/1), very fine grained,looseSAND (SP)wet, very pale brown (10YR 7/4) to light gray(10YR 7/1), very fine grained to fine grained

No Recovery

SAND (SP)wet, light gray (10YR 7/1), fine grained, <1-in thickvery dark grayish brown clay (10YR 3/2)No Recovery

SAND (SP)wet, pale brown (10YR 6/2), loose, fine grainedCLAY (CL)moist, yellowish red (5YR 5/6), firm

SILTY SAND (SM)wet, reddish brown (5YR 5/4), fine, looseCLAY AND SILT (CL/ML)moist, pink (7.5YR 7/4) and pale yellow (2.5Y 8/2),stiff, interbedded layersSILTY SAND (SM)wet, light reddish brown (5YR 6/4), fine grained,poorly sorted, staining in 1-cm bands, gray at 29.5ft bgs, moderate odor

CL

CL

SC

SP

SP

NR

SP

NR

SP

CL

SM

CL/ML

SM

Stick Up

CEMENT

GROUT

BENTONITE

FILTERPACK

SCREEN

4.0

4.0

4.0

3.0

4.0

0.0

1.5

2.5

2.5

2.5

0.0

4.0

8.0

12.0

15.0

19.0

20.0

22.5

25.0

27.5

LOGGER : Carrie Wallestad/DFW

PROJECT : North Cavalcade Superfund Site RA

DEPTH OF CASING,DRILLING

RATE, DRILLINGFLUID LOSS,

TESTS, &INSTRUMENTATION

DE

PTH

BE

LOW

GR

OU

ND

SU

RFA

CE

(ft)

USCS

COORDINATES : 13857994.8 N 3126267.3 E DRILLING METHOD AND EQUIPMENT : HSA B61, 8-in OD x 4 1/4-in ID auger

SOIL DESCRIPTION

SOIL NAME, USCS GROUP SYMBOL,

DENSITY OR CONSISTENCY, SOILSTRUCTURE, MINERALOGY

COLOR,MOISTURE CONTENT, RELATIVE

Soil Boring Log

MW30I

LOCATION : Houston, TX

DRILLING CONTRACTOR : Gainco Drilling, Driller: Stas Grover


END: 11/30/2010

SHEET 1 OF 2406762

COMMENTS WELL DIAGRAM

10.29 ft BTOC (12/14/2010)

ELE

VA

TIO

Nft

AM

SL

START: 11/30/2010

5

10

15

20

25

30

45

40

35

30

25

20

GR

AP

HIC

LO

G

ELEVATION : 48.97 ft

REC

OVE

RY

(ft)

INTE

RV

AL

(ft)

STATIC WATER LEVEL:

003103

Boring terminated at 36 ft bgs

CLAYEY SAND (SC)moist, reddish yellow (7.5YR 6/6), fine grained,poorly graded, moderate odorCLAY (CL)moist, reddish yellow (7.5YR 6/6), firmSILTY SAND (SM)moist, reddish yellow (7.5YR 6/6), poorly graded,fine grained, moderate odorCLAY (CL)moist, reddish yellow (5YR 6/6), mottled with lightgray (10YR 7/1), stiff

SC

CL

SM

CL

0.5ft SUMP

2.5

1.0

35.0

30.0

32.5

LOGGER : Carrie Wallestad/DFW





DE

PTH

BE

LOW

GR

OU

ND

SU

RFA

CE

(ft)

USCS

COORDINATES : 13857994.8 N 3126267.3 E DRILLING METHOD AND EQUIPMENT : HSA B61, 8-in OD x 4 1/4-in ID auger

SOIL DESCRIPTION




Soil Boring Log

MW30I




END: 11/30/2010

SHEET 2 OF 2406762


10.29 ft BTOC (12/14/2010)

ELE

VA

TIO

Nft

AM

SL

START: 11/30/2010

35

40

45

50

55

60

15

10

5

0

-5

-10

GR

AP

HIC

LO

G


REC

OVE

RY

(ft)

INTE

RV

AL

(ft)

STATIC WATER LEVEL:

003104

003105

003106








Josh McFarlain/HOU

Gainco Drilling, Driller: Walter Georg

3125626.17

MW42I

12/10/2010

47.45 ft

47.78 ft

13857987.30

HSA with Geoprobe 6620, 8-in OD x 4 1/4-in ID auger

Sch 40 PVC

2-in (ID)

slotted PVC

0.01-in

20/40 Sand

4 50-lb bags


1 50-lb bag

8-in


TOP OF CASING

FLUSH MONUMENT




BOTTOM OF SCREEN

TOP OF SCREEN


Houston, Texas



LOCATION:PROJECT:

STATIC WATER LEVEL:

LOGGED BY:

DRILLING METHOD:




12/14/2010START:


406762

8.2 ft BTOC (12/17/2010)


CASING MATERIAL:

CASING DIAMETER:

SCREEN TYPE:

SLOT SIZE:

FILTER PACK TYPE:

FILTER PACK QTY:

SEAL TYPE:

SEAL QTY:

BOREHOLE DIAMETER:

BOREHOLE DEPTH:

003107

Borehole advanced usingDirect Push Technology to 35ft bgs, followed by Hollow-Stem Auger drilling to 32.5 ftbgs.

CLAYEY SILT (ML)dry, very dark brown (10YR 2/2), organic materialat surface (grass and roots)SILTY SAND (SM)dry, gray (10YR 6/1), medium denseSILTY CLAYEY SAND (SM TO SC)dry, gray (10YR 6/1), medium dense, very finegrainedNo Recovery

SILTY CLAYEY SAND (SM TO SC)dry, light gray to pale brown (10YR 7/2 to 10YR8/4), medium dense, very fine grained

No Recovery

SANDY CLAY (CL)moist, light gray to very pale brown (10YR 7/2 to10YR 8/4), medium firm, medium plasticity, veryfine grained sandSILTY SAND (SM)wet, very pale brown (10YR 8/2), medium dense,very fine grainedNo Recovery

SAND (SP)wet, light gray to yellowish brown (10YR 7/2 to10YR 6/6), medium dense, very fine grained

CLAY (CH)dry, yellowish red with light gray (10YR 5/6 with10YR 7/2), very stiff, high plasticity

SILT (ML)wet, yellowish brown (10YR 5/6)CLAY (CH)dry, yellowish red with light gray (10YR 5/6 with10YR 7/2), very stiff, high plasticity, wetinterbedded silty zone between 26.5 and 26.7 ftbgs

Soil Description on next page

ML

SM

SM-SC

NR

SM-SC

NR

CL

SM

NR

SP

CH

ML

CH

ML

CEMENT

GROUT

BENTONITE

FILTERPACK

SCREEN

3.0

3.0

3.0

5.0

5.0

5.0

0.0

5.0

10.0

15.0

20.0

25.0

LOGGER : Josh McFarlain/HOU





DE

PTH

BE

LOW

GR

OU

ND

SU

RFA

CE

(ft)

USCS

COORDINATES : 13857987.3 N 3125626.2 E DRILLING METHOD AND EQUIPMENT : HSA with Geoprobe 6620, 8-in OD x 4 1/4-in ID auger

SOIL DESCRIPTION




Soil Boring Log

MW42I


DRILLING CONTRACTOR : Gainco Drilling, Driller: Walter Georg


END: 12/14/2010

SHEET 1 OF 2406762


8.2 ft BTOC (12/17/2010)

ELE

VA

TIO

Nft

AM

SL

START: 12/10/2010

5

10

15

20

25

30

45

40

35

30

25

20

GR

AP

HIC

LO

G


REC

OVE

RY

(ft)

INTE

RV

AL

(ft)

STATIC WATER LEVEL:

003108

Boring terminated at 32.5 ftbgs

SILT (ML)wet, yellowish brown (10YR 5/6), trace very finegrained sandSILTY SAND (SM)wet, yellowish brown (10YR 5/6), medium dense,very fine grainedCLAY (CH)dry, brown (10YR 5/3), very stiff, high plasticity

SM

CH

5.0

35.0

30.0

LOGGER : Josh McFarlain/HOU





DE

PTH

BE

LOW

GR

OU

ND

SU

RFA

CE

(ft)

USCS


SOIL DESCRIPTION




Soil Boring Log

MW42I


DRILLING CONTRACTOR : Gainco Drilling, Driller: Walter Georg


END: 12/14/2010

SHEET 2 OF 2406762


8.2 ft BTOC (12/17/2010)

ELE

VA

TIO

Nft

AM

SL

START: 12/10/2010

35

40

45

50

55

60

15

10

5

0

-5

-10

GR

AP

HIC

LO

G


REC

OVE

RY

(ft)

INTE

RV

AL

(ft)

STATIC WATER LEVEL:

003109

003110

003111








Roger Gomez/SAN

Gainco Drilling, Driller: Stas Grover

3125390.52

MW47I

11/22/2010

47.73 ft

48.25 ft

13857877.22

HSA with Geoprobe 6620, 7-in OD x 3 3/4-in ID auger

Sch 40 PVC

2-in (ID)

slotted PVC

0.01-in

20/40 Sand

6 50-lb bags


1 50-lb bag

7-in


TOP OF CASING

FLUSH MONUMENT




BOTTOM OF SCREEN

TOP OF SCREEN


Houston, Texas



LOCATION:PROJECT:

STATIC WATER LEVEL:

LOGGED BY:

DRILLING METHOD:




11/22/2010START:


406762

9.35 ft BTOC (12/6/2010)


CASING MATERIAL:

CASING DIAMETER:

SCREEN TYPE:

SLOT SIZE:

FILTER PACK TYPE:

FILTER PACK QTY:

SEAL TYPE:

SEAL QTY:

BOREHOLE DIAMETER:

BOREHOLE DEPTH:

003112


SOILdry, very dark gray (10YR 3/1), stiff, some gravels

No Recovery

No Recovery

SANDY CLAY (CL)dry, yellowish brown (10YR 5/6) with brownishyellow mottling, stiff, medium plasticity

SILTY SAND (SM)moist, gray (10YR 6/1), loose, very fine grained,well sorted

SILTY SAND (SM)wet, gray (10YR 6/1), loose very fine grained, wellsorted

SILTY SAND (SM)wet, light brownish gray (10YR 6/2), mediumdense, trace clay, low plasticity, medium grained,well sortedNo Recovery

SILTY SAND (SM)wet, light brownish gray (10YR 6/2), mediumdense, trace clay, low plasticity, medium grained,well sortedCLAY (CH)dry to moist, red (2.5YR 4/6), high plasticity, verystiffSLOUGHSILTY CLAY (CL)wet, red (2.5YR 4/6), soft, medium plasticityCLAY (CH)dry, red (2.5YR 4/6), hard, high plasticity

SOIL

NR

NR

CL

SM

SM

SM

NR

SM

CH

NR

CL

CH

CEMENT

GROUT

BENTONITE

FILTERPACK

SCREEN

2.5

2.0

4.0

2.0

3.0

1.5

2.0

3.0

0.0

0.0

4.0

8.0

12.0

14.0

18.0

20.0

24.0

28.0

LOGGER : Roger Gomez/SAN





DE

PTH

BE

LOW

GR

OU

ND

SU

RFA

CE

(ft)

USCS


SOIL DESCRIPTION




Soil Boring Log

MW47I




END: 11/22/2010

SHEET 1 OF 2406762


9.35 ft BTOC (12/6/2010)

ELE

VA

TIO

Nft

AM

SL

START: 11/22/2010

5

10

15

20

25

30

45

40

35

30

25

20

GR

AP

HIC

LO

G


REC

OVE

RY

(ft)

INTE

RV

AL

(ft)

STATIC WATER LEVEL:

003113

Boring terminated at 36 ft bgs

CLAYEY SILT (ML)wet, red (2.5YR 4/6), soft, low plasticity

CLAY (CH)dry, dark red (2.5YR 3/6), hard

CLAY (CH)dry, dark red (2.5YR 3/6), hard, high plasticity

ML

CH

CH

0.5ft SUMPBENTONITE

2.0

2.0

4.0

38.0

30.0

32.0

34.0






DE

PTH

BE

LOW

GR

OU

ND

SU

RFA

CE

(ft)

USCS


SOIL DESCRIPTION




Soil Boring Log

MW47I




END: 11/22/2010

SHEET 2 OF 2406762


9.35 ft BTOC (12/6/2010)

ELE

VA

TIO

Nft

AM

SL

START: 11/22/2010

35

40

45

50

55

60

15

10

5

0

-5

-10

GR

AP

HIC

LO

G


REC

OVE

RY

(ft)

INTE

RV

AL

(ft)

STATIC WATER LEVEL:

003114

003115

003116








Roger Gomez/SAN

Gainco Drilling, Driller: Margarito Estrada

3124779.30

MW52I

11/30/2010

46.87 ft

47.10 ft

13857832.74

HSA with Geoprobe 6620, 7 1/4-in OD x 3 3/4-in ID auger

Sch 40 PVC

2-in (ID)

slotted PVC

0.01-in

20/40 Sand

3.5 50-lb bags


1 50-lb bag

8-in


TOP OF CASING

FLUSH MONUMENT




BOTTOM OF SCREEN

TOP OF SCREEN


Houston, Texas



LOCATION:PROJECT:

STATIC WATER LEVEL:

LOGGED BY:

DRILLING METHOD:




11/30/2010START:


406762

10.05 ft BTOC (12/9/2010)


CASING MATERIAL:

CASING DIAMETER:

SCREEN TYPE:

SLOT SIZE:

FILTER PACK TYPE:

FILTER PACK QTY:

SEAL TYPE:

SEAL QTY:

BOREHOLE DIAMETER:

BOREHOLE DEPTH:

003117

mohare

Draft


SOILblack, organic, silty clay

SANDY CLAY (CL)dry, grayish brown (10YR 5/2), stiff, mediumplasticity

SANDY CLAY (CL)dry, light gray (10YR 7/2) with brownish yellowmottling, stiff

SILTY SAND (SM)moist, light gray (10YR 7/2), medium dense, finegrained, well sorted, wet at 12 ft bgs

CLAY (CH)dry, red (2.5YR 4/8) with trace gray mottling, hard,high plasticity

CLAYEY SILT (ML)wet, red (2.5YR 4/8), soft, no plasticity

SANDY CLAY (CL)dry to moist, red (2.5YR 4/8), soft to stiff, noplasticity

SOIL

CL

CL

SM

CH

ML

CL

CEMENT

GROUT

BENTONITE

FILTERPACK

SCREEN

0.5ft SUMP

5.0

5.0

4.0

5.0

5.0

5.0

0.0

5.0

10.0

15.0

20.0

25.0






DE

PTH

BE

LOW

GR

OU

ND

SU

RFA

CE

(ft)

USCS

COORDINATES : 13857832.7 N 3124779.3 E DRILLING METHOD AND EQUIPMENT : HSA with Geoprobe 6620, 7 1/4-in OD x 3 3/4-in ID auger

SOIL DESCRIPTION




Soil Boring Log

MW52I


DRILLING CONTRACTOR : Gainco Drilling, Driller: Margarito Estrada


END: 11/30/2010

SHEET 1 OF 2406762


10.05 ft BTOC (12/9/2010)

ELE

VA

TIO

Nft

AM

SL

START: 11/30/2010

5

10

15

20

25

30

45

40

35

30

25

20

GR

AP

HIC

LO

GELEVATION : 47.10 ft

REC

OVE

RY

(ft)

INTE

RV

AL

(ft)

STATIC WATER LEVEL:

003118

Boring terminated at 30 ft bgsCLAY (CH)dry, red (2.5YR 4/8) with gray mottling, hard, highplasticity

CH5.0

35.0

30.0






DE

PTH

BE

LOW

GR

OU

ND

SU

RFA

CE

(ft)

USCS

COORDINATES : 13857832.7 N 3124779.3 E DRILLING METHOD AND EQUIPMENT : HSA with Geoprobe 6620, 7 1/4-in OD x 3 3/4-in ID auger

SOIL DESCRIPTION




Soil Boring Log

MW52I


DRILLING CONTRACTOR : Gainco Drilling, Driller: Margarito Estrada


END: 11/30/2010

SHEET 2 OF 2406762


10.05 ft BTOC (12/9/2010)

ELE

VA

TIO

Nft

AM

SL

START: 11/30/2010

35

40

45

50

55

60

15

10

5

0

-5

-10

GR

AP

HIC

LO

GELEVATION : 47.10 ft

REC

OVE

RY

(ft)

INTE

RV

AL

(ft)

STATIC WATER LEVEL:

003119

003120

003121

Documents

Ground Water Classification Test Field Procedure … water classification test field procedure (yield test) north cavalcade street superfund site, houston, texas ncra_tm-gwclassificationprocedure_2011-0401.docx