phase ii groundwater sampling addendum …...u.s. epa region 9 phase ii groundwater sampling fsp...

U.S. EPA Region 9 Phase II Groundwater Sampling FSP Addendum 1 HydroGeoLogic, Inc. 3/7/2011

PHASE II GROUNDWATER SAMPLING ADDENDUM TO THE PHASE I FIELD SAMPLING PLAN FOR

GROUNDWATER, SURFACE WATER, AND SEDIMENT SANTA SUSANA FIELD LAOBOTRORY SITE

AREA IV RADIOLOGICAL STUDY

TO: Mary Aycock, EPA Region 9 RPM FROM: Terry Stewart Williford, HGL Geologist THROUGH: L. Steven Vaughn, HGL Project Manager CC: Craig Cooper, EPA Region 9 RPM Gregg Dempsey, Technical Advisor Nicole Moutoux, EPA Region 9 RPM DATE: March 7, 2011 SUBJECT: FSP Addendum for Phase II Groundwater Sampling CONTRACT NO: EP-S7-05-05 TASK ORDER NO: 0038

INTRODUCTION

HydroGeoLogic, Inc. (HGL) has been tasked by the U. S. Environmental Protection Agency (USEPA) to conduct a radiological characterization study of the Santa Susana Field Laboratory (SSFL) at Area IV and the Northern Buffer Zone (NBZ) located in Ventura County, California. This work is being executed under USEPA Region 7 Architect and Engineering Services Contract EP-S7-05-05, Task Order 0038. The technical lead on the project is USEPA Region 9. This document supports the field implementation of the groundwater sampling program and is an addendum to the Final Phase I Field Sampling Plan (FSP) for Groundwater, Surface Water, and Sediment (HGL, 2010). A description of the overall project goals, data quality objectives, sampling strategy, laboratory analytical suites, data quality control, and data evaluation are described in the FSP.

PURPOSE

The purpose of this addendum is to document the groundwater monitoring wells and the off-site wells that will be sampled during the Phase II portion of the Area IV Radiological Study Groundwater Sampling program.

AREA IV GROUNDWATER MONITORING WELLS

During the Phase II groundwater sampling event, we will attempt to collect samples from the same 85 groundwater monitoring wells that were in the Phase I sampling program (Table 1). During the Phase I event 16 of these monitoring wells were dry.

HGL—Phase II Groundwater Sampling FSP Addendum to the Phase I FSP, SSFL—Ventura County, CA


Wells Dry During Phase I Sampling Event

Well ID Date

Gauged Well ID Date

Gauged RD-97 7/21/2010 PZ-101 8/30/2010

RS-11 8/26/2010 PZ-102 8/24/2010

RS-16 7/21/2010 PZ-110 7/21/2010

RS-23 7/21/2010 PZ-111 7/21/2010 RS-24 7/21/2010 PZ-113 7/21/2010

RS-27 7/21/2010 PZ-116 7/21/2010

PZ-055 7/21/2010 PZ-124 7/21/2010

PZ-073 7/21/2010 PZ-143 7/21/2010

A site-wide gauging event was conducted on January 10, 2011. During this event 10 wells were dry.

Wells Dry During Site-wide Gauging Event (1/10/2011)

Well ID Date

Gauged Well ID Date

Gauged RS-16 1/10/11 PZ-110 1/10/11

RS-23 1/10/11 PZ-111 1/10/11

RS-24 1/10/11 PZ-116 1/10/11

PZ-055 1/10/11 PZ-124 1/10/11

PZ-073 1/10/11 PZ-143 1/10/11

The groundwater monitoring wells will be gauged again before they are sampled. An attempt to collect a sample will be made if there is at least 0.30 inches of groundwater present in the well. OFF-SITE GROUNDWATER WELLS A total of 14 off-site groundwater wells will be sampled if groundwater is present and the wells are operable.

Off-site Well Phase II Groundwater Sampling Event

Well ID Well ID OS-2 OS-21

OS-3 RD-59A

OS-4 RD-59B

OS-5 RD-59C OS-9 RD-68A

OS-9R RD-68B

OS-10 WS-9A



Figure 2 presents the locations of the off-site wells. The following wells OS-2, OS-3, OS-4, OS-5, OS-9, OS-10, RD-59B, RD59C, RD-68A and RD-68B are artesian wells located on the Bandeis-Bardin property. Samples from wells OS-2, OS-3, OS-4 OS-5, OS-9 and OS-10 will be collected from free flowing water. Wells RD-59B, RD-59C, RD-68A and RD-68B will be sampled from sample ports located on the wells. Well OS-9R, also located on Bandeis-Bardin property, contains a Westbay Multilevel System that is similar to the FLUTe wells in Area IV. Port 1 will be sampled in accordance with Section 3.5 of the Phase I FSP (HGL, 2010). Well OS-21 is located approximately a half mile west of Area IV, just south of the Albertson Fire Road, and is a windmill well. USEPA/HGL is currently working on acquiring access to this well. A sample will be collected if access is granted and the sample can be pulled from the well. Well WS-9A is owned by NASA and is located within SSFL Area II. The well is currently being used as an extraction well to control groundwater flow down-gradient. The pump is running most of the time and arrangements will be made to sample the well while the pump is running. The well is equipped with a spigot sampling port which will be used to collect the sample. Well RD-59A has a dedicated electric submersible pump and will be sampled in accordance with the protocol outlined in Section 4.6.2.3 of the Phase I FSP (HGL, 2010). LABORATORY ANALYSIS As described in the Final Phase I FSP (HGL, 2010) groundwater samples will be analyzed for a subset of radionuclide’s of interest (ROIs) selected from the complete list of soil ROIs. This approach provides the data necessary to meet the data quality objectives of the project while optimizing costs. The approach summarized below was applied during selection of the targeted list of groundwater ROIs to balance the radionuclide information that will be obtained from different analytical methods and the need to provide adequate sampling coverage. The following prioritization was developed to achieve this cost/benefit balance.

• Priority 1 - analyses will be performed on all groundwater samples. • Priority 2 - analyses will be performed on a select number of groundwater samples due

to budget limitations. • Other - analyses will not be performed on Phase I samples but may be considered for

Phase II. Table 2 summarizes the analyte list for each priority analysis. For further details regarding the analyte list selection refer to the Final Phase I FSP (HGL, 2010). Note that the Priority 2 analytes will be analyzed only at a few wells as listed on Table 1.



It is important to note that each water analysis requires a minimum volume of water. Certain wells, particularly shallow wells, are likely to become dry during sampling before a sufficient volume of water can be acquired for all analyses. If the volume of water that can be collected is limited, the laboratory will be instructed to subsample the gamma spectroscopy volume for analysis of the remaining analytes where practical. Following is the order in which sample volumes will be analyzed:

• H-3 • Gamma spectroscopy analytes (with one exception for Sr-90, see below) • Uranium isotopes • Sr-90 (this radionuclide will be given second priority at well RD-98 where it has been

reported before). • Gross alpha and beta radiation. • Priority 2 analyses in the following sets:

o Am-241, Cm-243, Cu-244, Cm-245, Cm-246 o Pu-238, Pu-239, Pu-240, Pu-242 o Np-237 o Ra-226 o I-129 o Tc-99 o C-14

REFERENCES

HydroGeoLogic, Inc., 2010. Final Phase I Field Sampling Plan for Groundwater, Surface Water, and Sediment, Area IV Radiological Study, Santa Susana Field Laboratory, Ventura County, California. July 28, 2010.

ATTACHMENT

Attachment 1 Figures Attachment 2 Tables


U.S. EPA Region 9 Phase II Groundwater Sampling FSP Addendum HydroGeoLogic, Inc. 3/7/2011

ATTACHMENT 1

FIGURES

Figure 1 Area IV Groundwater Monitoring Well Locations Figure 2 Off-site Well Locations

HGL— Phase II Groundwater, Addendum, SSFL—Ventura County, CA

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RD-97

RD-70

RD-57

RS-23

RS-16

RD-91

RD-50

RD-22

RS-28

RS-25

RD-98

RD-96

RD-90 RD-89RD-88

WS-07

RD-92

RD-85RD-18

RD-14

RD-13

RD-20

RS-27 RS-11

RD-95

RD-29

RS-24

RD-17

RD-16

PZ-151

RD-56B

RD-56A

RD-33C

RD-33B

PZ-143

PZ-114

PZ-113

PZ-056

PZ-055

PZ-105

PZ-103 PZ-104

PZ-005

PZ-108

PZ-107

PZ-111

PZ-110

RS-54

RS-18

RD-94

RD-93

RD-87

RD-86

RD-74

RD-65

RD-64

RD-63

RD-54C

RD-54B

RD-54A

RD-34C

RD-34BRD-34A

RD-33A

RD-30

RD-27

RD-24

RD-23

RD-21

RD-19

RD-15

RD-07

PZ-161

PZ-160

PZ-150

PZ-124

PZ-122

PZ-121

PZ-120

PZ-116 PZ-115

PZ-112

PZ-109

PZ-106

PZ-102

PZ-101PZ-100

PZ-099

PZ-098

PZ-097

PZ-073

PZ-052

PZ-051

PZ-041

ES-31

Legend

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RD-97

RD-70

RD-57

RS-23

RS-16

RD-91

RD-50

RD-22

RS-28

RS-25

RD-98

RD-96

RD-90 RD-89RD-88

WS-07

RD-92

RD-85RD-18

RD-14

RD-13

RD-20

RS-27 RS-11

RD-95

RD-29

RS-24

RD-17

RD-16

PZ-151

RD-56B

RD-56A

RD-33C

RD-33B

PZ-143

PZ-114

PZ-113

PZ-056

PZ-055

PZ-105

PZ-103 PZ-104

PZ-005

PZ-108

PZ-107

PZ-111

PZ-110

RS-54

RS-18

RD-94

RD-93

RD-87

RD-86

RD-74

RD-65

RD-64

RD-63

RD-54C

RD-54B

RD-54A

RD-34C

RD-34BRD-34A

RD-33A

RD-30

RD-27

RD-24

RD-23

RD-21

RD-19

RD-15

RD-07

PZ-161

PZ-160

PZ-150

PZ-124

PZ-122

PZ-121

PZ-120

PZ-116 PZ-115

PZ-112

PZ-109

PZ-106

PZ-102

PZ-101PZ-100

PZ-099

PZ-098

PZ-097

PZ-073

PZ-052

PZ-051

PZ-041

ES-31

Figure 1Proposed Phase II On-Site Well

Sampling Locations atSanta Susana Field Laboratory

Y:\Santa_Susana\EP9038\GW_SW_Sediment_FSP\(3-3)_Area_IV_Onsite_SampleLocs_20110303.mxd3/3/2011 sdrallos-kopeckySource: Streams, SWMUs, and AOC Data. Boeing. 2009.Aerial Imagery. Channel Islands RegionalGeographic Information Systems 2007

U.S. EPA Region 9

³

Northern BufferZone Boundary

Santa Susana Field LaboratoryArea IV Boundary

Intermittent Stream

Perennial Stream

Proposed Well Sampling Location!A

Proposed Piezometer Sampling Location#0

0 500 1,000250

Scale In Feet

Well Damaged or Abandoned!A

#0 Piezometer Damaged or Abandoned

HGL— Phase II Groundwater Addendum SSFL—Ventura County, CA

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AREA IAREA II

AREA IVAREA III

NASA

NorthernBuffer Zone

SouthernBuffer Zone

OS-9

OS-5

OS-4

OS-2

WS-9A

OS-21

OS-10

OS-9R

RD-68B

RD-68A

RD-59C

RD-59B

OS-3RD-59A

Legend

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AREA IAREA II

AREA IVAREA III

NASA

NorthernBuffer Zone

SouthernBuffer Zone

OS-9

OS-5

OS-4

OS-2

WS-9A

OS-21

OS-10

OS-9R

RD-68B

RD-68A

RD-59C

RD-59B

OS-3RD-59A

Figure 2 Proposed Off-Site WellSampling Locations at

Santa Susana Field Laboratory

0 870 1740435

Feet

U.S. EPA Region 9

³

Intermittent Stream

Perennial Stream

Santa Susana Field LaboratoryArea IV BoundarySanta Susana Field LaboratorySite BoundaryNorthern BufferZone Boundary

Note:Offsite well locations and the study area boundarywere obtained from the following source: Technical Memorandum Off-Site Well Inventory. Santa Susana Field Laboratory; Ventura County, CA DRAFT. April 4, 2007. Prepared for The Boeing Company, Santa Susana Field Laboratory. Prepared by MWH.

Well used in SSFLMonitoring Network

1 Mile Survey Radius

Y:\Santa_Susana\EP9038\DataInventory\(6)_Offsite_Well_Locations_20110303.mxdProject: EP90383/3/2011 sdrallos-kopeckySource: Boeing, 2009

Proposed Off-Site WellSampling Location OS-9

Active Well!A


U.S. EPA Region 9 Phase II Groundwater Sampling FSP Addendum HydroGeoLogic, Inc. 3/7/2011

ATTACHMENT 2

TABLES

Table 1 Proposed On-site Well Sampling Locations Table 2 Proposed Radionuclide for Analysis


Table 1Proposed On-Site Well Sampling Locations

Phase II Groundwater Sampling FSP Addendum

U.S. EPA Region 91 of 3 HydroGeoLogic, Inc. 3/7/2011

Well ID

Northing EastingDate

Drilled

Casing Interval

(feet)

Casing Dia.

(inches)

Total Well Depth

(feet bgs)

Measuring Point

Elevation

Date of Last DTW

Last DTW Elevation

Last DTW

Screened Interval

Sand Interval

Bentonite Interval

Grout Interval

Concrete Interval

FormationSampled During Phase I

Priority I

PriorityII

Comments

ES-31 266692.4 1785729.5 1/29/1987 0-25 6 25 1787.01 1/10/2011 1776.8 10.21 11.6-25 Shallow well Yes •PZ-005 266634.9 1784877.3 11/7/2000 -- -- 45 1800.97 1/10/2011 1784.7 16.27 15-25 11.5-26.5 8.5-11.5 2-8.5 0-2 Shallow Piezometer Yes •PZ-041 267315.8 1785662.0 1/16/2001 -- -- 28.59 1809.1 1/10/2011 1796.18 12.92 19-29 17-29.6 14-17 2-14 0-2 Shallow Piezometer Yes •PZ-051 266485.8 1785857.0 12/14/2000 -- -- 27 1770.87 3/24/2010 1765.8 5.07 5-15 3-16 2-3 NA 0-2 Shallow Piezometer No Well DamagedPZ-052 266742.1 1786103.7 12/15/2000 -- -- 30 1790.72 1/10/2011 1766.97 23.75 18.9-28.9 17-30 14-17 2-14 0-2 Shallow Piezometer Yes •PZ-055 267253.6 1787421.3 1/2/2001 -- -- 29.5 1818.4 1/10/2011 Dry Dry 19-29 17-29.5 14-17 2-14 0-2 Shallow Piezometer No Well DryPZ-056 268068.7 1788028.0 12/19/2000 -- -- 28 1805.86 1/10/2011 1793.15 12.71 17-27 13-28 10-13 2-10 0-2 Shallow Piezometer Yes •PZ-073 269435.8 1788107.5 1/3/2001 --- --- 55 1760.54 1/10/2011 Dry Dry 41-51 35-55 30.5-35 2-30.5 0-2 Shallow Piezometer No Well DryPZ-097 267048.9 1783400.3 10/15/2001 --- --- 44.5 1761.87 1/10/2011 Dry Dry 33-43 31-44.5 11.5-28 2-11.5 0-2 Shallow Piezometer No Well DryPZ-098 266788.9 1783488.8 10/16/2001 --- --- 37.5 1797.78 1/10/2011 1772.88 24.9 24-34 21.5-37.5 19-21.5 2-19 0-2 Shallow Piezometer Yes •PZ-099 266508.7 1783141.0 10/17/2001 33 1819.57 3/24/2010 Not applicable 18-28 16-33 13.5-16 12-13.5 NA Shallow Piezometer No Well AbandonedPZ-100 266078.3 1782962.2 10/17/2001 --- --- 19.33 1870.11 1/10/2011 1859.93 10.18 5.67-15.67 4.67-16.5 2-4.67 NA 0-2 Shallow Piezometer Yes •PZ-101 266057.5 1783090.6 10/17/2001 --- --- 27 1869.71 1/10/2011 1859.63 10.08 10-20 7-27 5-7 1.75-5 0-1.75 Shallow Piezometer No Well DryPZ-102 266501.1 1783693.0 10/18/2001 --- --- 59.2 1827.78 1/10/2011 1773.22 54.56 48.5-59.2 45-59.2 43-45 2-43 0-2 Shallow Piezometer No Well DryPZ-103 266281.2 1784400.9 10/22/2001 -- -- 39 1815.93 1/10/2011 1790.5 25.43 28.5-38.5 26-39 23.5-26 2-23.5 0-2 Shallow Piezometer Yes •PZ-104 266270.2 1784924.2 10/22/2001 -- 38.5 1797.47 3/24/2010 1767.2 30.27 18-28 16-30 13-16 2-13 0-2 Shallow Piezometer No Well DamagedPZ-105 265935.5 1784787.9 10/23/2001 -- -- 28 1803.87 1/10/2011 1785.51 18.36 17-27 15-28 12-15 2-12 0-2 Shallow Piezometer Yes •PZ-106 266411.9 1785469.6 10/23/2001 -- -- 35 1784.17 1/10/2011 1766.47 17.7 18-28 16-30.5 12.75-16 2-12.75 0-2 Shallow Piezometer Yes •PZ-107 266876.4 1785822.0 10/24/2001 -- -- 11 1793.62 3/24/2010 Dry Dry 5-10 4-11 2-4 NA 0-2 Shallow Piezometer No Well DryPZ-108 267332.4 1785248.2 10/24/2001 -- -- 30 1763.01 1/10/2011 1754.21 8.8 16-26 13-28.5 10-13 2-10 0-2 Shallow Piezometer Yes •PZ-109 267080.8 1784684.4 10/25/2001 -- -- 36.5 1809.51 1/10/2011 1794.31 15.2 25-35 22-36.5 19-22 2-19 0-2 Shallow Piezometer Yes •PZ-110 267204.0 1786209.6 10/25/2001 -- -- 17.5 1818.9 1/10/2011 Dry Dry 7-17 5-17.5 2-5 NA 0-2 Shallow Piezometer No Well DryPZ-111 266948.4 1786433.9 10/26/2001 -- -- 20 1794.9 1/10/2011 Dry Dry 7.5-17.5 5-20 NA NA NA Shallow Piezometer No Well DryPZ-112 267435.9 1786720.8 10/26/2001 -- -- 35 1829.14 1/10/2011 1801.39 27.75 24-34 22-35 19-22 19-Feb 0-2 Shallow Piezometer Yes •PZ-113 267682.9 1787367.8 10/29/2001 -- -- 15 1823.68 1/10/2011 1815.36 8.32 7-15 5-15 2-5 NA 0-2 Shallow Piezometer No Well DryPZ-114 268304.0 1787913.1 10/30/2001 -- -- 48.2 1818.19 1/10/2011 Dry Dry 37-47 35-48.2 32-35 2-32 0-2 Shallow Piezometer Yes •PZ-115 268006.8 1787536.5 10/30/2001 -- -- 40 1817.81 3/24/2010 Dry Dry 25.5-37.5 25-40 22-25 2-22 0-2 Shallow Piezometer No Well DamagedPZ-116 268032.6 1785076.3 10/31/2001 --- --- 34 1827.78 1/10/2011 Dry Dry 22-32 20-34 17-20 2-17 0-2 Shallow Piezometer No Well DryPZ-120 267230.1 1785009.7 3/18/2003 -- -- 26 1810.96 1/10/2011 1796.21 14.75 15-25 12-26 9-12 2-9 0-2 Shallow Piezometer Yes •PZ-121 267491.6 1785120.7 3/19/2003 -- -- 33 1808.98 1/10/2011 1789.38 19.6 15-25 12-28 8.4-12; 28-33 1.5-8.4 0-1.5 Shallow Piezometer Yes •PZ-122 267091.9 1785176.5 3/19/2003 -- -- 27.5 1810.8 1/10/2011 1799.05 11.75 15.5-25.5 12-27.5 9-12 2-9 0-2 Shallow Piezometer Yes •PZ-124 267166.7 1784015.9 3/21/2003 --- --- 31 1764.11 1/10/2011 1736.19 27.92 14.7-24.7 11.3-31 8.3-11.3 1-8.3 0-1 Shallow Piezometer No Well DryPZ-143 269399.5 1788800.7 --- 2 67 1849.84 1/10/2011 Dry Dry 55-65 Shallow Piezometer No Well DryPZ-150 268281.7 1786086.8 -- -- 30.48 1852.23 1/10/2011 1833.41 18.82 --- --- --- --- --- Shallow Piezometer Yes •PZ-151 268743.1 1787988.8 -- -- 79.62 --- 1/10/2011 --- 77.61 --- --- --- --- --- Shallow Piezometer Yes •PZ-160 268345.0 1786286.1 -- -- 29.58 1851.41 1/10/2011 1822.39 29.02 --- Shallow Piezometer Yes •PZ-161 268418.8 1786132.4 -- 4 30.07 1852.23 1/10/2011 1824.43 27.8 --- Shallow Piezometer Yes •RD-07 266937.9 1784160.7 1/8/1986 0-25 10.125 300 1812.82 1/10/2011 Measured - FLUTe Open hole Chatsworth Yes •RD-13 265809.9 1784083.7 7/25/1989 0-30 8.25 160 1840.27 1/10/2011 1775.54 64.73 Open hole Chatsworth Yes • •





Well ID


Drilled

Casing Interval

(feet)

Casing Dia.

(inches)

Total Well Depth

(feet bgs)

Measuring Point

Elevation

Date of Last DTW

Last DTW Elevation

Last DTW

Screened Interval

Sand Interval

Bentonite Interval

Grout Interval

Concrete Interval


Priority I

PriorityII

Comments

RD-14 268605.9 1787467.9 7/27/1989 0-30 8.25 125 1824.29 1/10/2011 1741.41 82.88 Open hole Chatsworth Yes •RD-15 268114.6 1787805.6 7/27/1989 0-30 8.25 152 1817.7 1/10/2011 1767.22 50.48 Open hole Chatsworth Yes •RD-16 267211.2 1786783.5 8/15/1989 0-30 8.25 220 1808.99 1/10/2011 1762.68 46.31 Open hole Chatsworth Yes •RD-17 267668.1 1786003.5 8/10/1989 0-30 8.25 125 1836.3 1/10/2011 1808.24 28.06 Open hole Chatsworth Yes • •RD-18 268517.6 1786851.9 7/28/1989 0-30 8.25 240 1839.49 1/10/2011 1747.08 92.41 Open hole Chatsworth Yes •RD-19 268204.7 1785783.9 7/31/1989 0-30 8.25 135 1853.13 1/10/2011 1789.95 63.18 Open hole Chatsworth Yes • •RD-20 266605.4 1784382.9 7/27/1989 0-30 8.25 127 1819.72 1/10/2011 1775.6 44.12 Open hole Chatsworth Yes •RD-21 266053.3 1783079.8 8/11/1989 0-30 8.25 175 1866.96 1/10/2011 Measured - FLUTe Open hole Chatsworth Yes •RD-22 266277.8 1782691.1 8/15/1989 0-30 8.25 440 1853.41 1/10/2011 Measured - FLUTe Open hole Chatsworth Yes •RD-23 266390.8 1783122.8 8/16/1989 0-30 8.25 440 1838.19 1/10/2011 Measured - FLUTe Open hole Chatsworth Yes •RD-24 267283.0 1784708.6 8/9/2009 0-30 8.25 150 1809.93 1/10/2011 1770.68 39.25 Open hole Chatsworth Yes •RD-25 -- -- -- -- -- -- -- 1Qtr 2004 1684.71 126.05 --- Chatsworth No Well AbandonedRD-27 267977.7 1785610.5 8/10/1989 0-30 8.25 150 1841.67 1/10/2011 1788.97 52.7 Open hole Chatsworth Yes •RD-28 -- -- -- -- -- -- -- 1Qtr 2004 1750.08 60.48 --- Chatsworth No Well AbandonedRD-29 266949.3 1785123.3 8/10/1989 0-30 8.25 100 1806.29 1/10/2011 1794.9 11.39 Open hole Chatsworth Yes • •RD-30 268026.0 1785319.8 8/11/1989 0-30 8.25 75 1768.69 1/10/2011 Capped Open hole Chatsworth No Well CappedRD-33A 266547.6 1782597.6 9/27/1991 0-11 12.125 320 1792.97 1/10/2011 Measured - FLUTe Open hole Chatsworth Yes •RD-33B 266546.9 1782616.8 9/27/1991 0-20 12.125 415 1793.21 1/10/2011 1511.22 281.99 Open hole Chatsworth Yes •RD-33C 266547.6 1782576.7 9/21/1991 0-10 12.125 520 1793.54 1/10/2011 1510.12 283.42 Open hole Chatsworth Yes •RD-34A 268046.0 1785103.3 7/25/1991 0-16 8.25 60 1761.83 1/10/2011 1718.31 43.52 Open hole Chatsworth Yes •RD-34B 268058.3 1785096.2 8/11/1991 0-30 12.125 240 1762.51 1/10/2011 1715.79 46.72 Open hole Chatsworth Yes • •RD-34C 268035.0 1785086.8 8/10/1991 0-30 12.125 450 1762.6 1/10/2011 1750.02 12.58 Open hole Chatsworth Yes •RD-50 265713.8 1783049.0 5/28/1993 0-18.5 8.25 195 1914.88 1/10/2011 Measured - FLUTe Open hole Chatsworth Yes •RD-54A 266312.8 1783135.8 8/7/1993 0-19 12.125 278 1841.72 1/10/2011 Measured - FLUTe Open hole Chatsworth Yes •RD-54B 266350.2 1783087.3 8/31/1993 0-19 12.125 437 1842.54 1/10/2011 1595.43 247.11 Open hole Chatsworth Yes •RD-54C 266313.8 1783106.8 7/27/1993 0-20 12.125 638 1843.77 1/10/2011 1615.35 228.42 Open hole Chatsworth Yes •RD-56A 269425.0 1788099.1 3/8/1994 0-20.5 12.125 397.5 1758.62 1/10/2011 1439.72 318.9 Open hole Chatsworth Yes •RD-56B 269402.1 1788070.9 7/24/1997 0-10 16 463 1761.83 1/10/2011 1587.94 173.89 Open hole Chatsworth Yes • •RD-57 266916.2 1782949.9 2/23/1994 0-19.5 12.125 419 1774.15 1/10/2011 Measured - FLUTe Open hole Chatsworth Yes •RD-63 268029.8 1785216.8 5/10/1994 0-20 8.25 230 1764.85 1/10/2011 1742.75 22.1 Open hole Chatsworth Yes •RD-64 266259.4 1782967.8 5/19/1994 0-19 8.25 398 1857.04 1/10/2011 Measured - FLUTe Open hole Chatsworth Yes •RD-65 266543.7 1783268.6 8/14/1994 0-19 8.25 397 1819.14 1/10/2011 Measured - FLUTe Open hole Chatsworth Yes •RD-70 269722.5 1789696.1 6/14/1997 0-19 12 278 1732.26 1/10/2011 1589.04 143.22 Open hole Chatsworth Yes •RD-74 267112.6 1784112.9 1/21/1999 0-30 12 101 1810.9 1/10/2011 1780.32 30.58 Open hole Chatsworth No Well DamagedRD-85 268384.8 1786082.0 8/4/2004 0-20 8 90 1849.09 1/10/2011 1790.08 59.01 Open hole Chatsworth Yes •RD-86 268480.4 1786522.8 8/9/2004 0-20 8 80 1830.51 1/10/2011 1792.27 38.24 Open hole Chatsworth Yes •RD-87 267800.3 1784860.5 8/11/2004 0-20 8 60 1789.09 1/10/2011 1742.01 47.08 Open hole Chatsworth Yes •RD-88 267691.4 1784770.0 8/16/2004 0-20 8 30 1774.62 1/10/2011 1751.99 22.63 Open hole Chatsworth Yes •RD-89 267732.2 1785204.3 5/18/2005 0-30 8 53.18 1814.18 1/10/2011 1772.22 41.96 Open hole Chatsworth No Well DamagedRD-90 267701.9 1784858.9 3/11/2004 0-20 8 125 1784.75 1/10/2011 1752.92 31.83 Open hole Chatsworth Yes •





Well ID


Drilled

Casing Interval

(feet)

Casing Dia.

(inches)

Total Well Depth

(feet bgs)

Measuring Point

Elevation

Date of Last DTW

Last DTW Elevation

Last DTW

Screened Interval

Sand Interval

Bentonite Interval

Grout Interval

Concrete Interval


Priority I

PriorityII

Comments

RD-91 266538.2 1783945.5 3/12/2004 0-20 8 140 1818.04 1/10/2011 1757.22 60.82 0-20 Chatsworth Yes •RD-92 267847.1 1787222.9 3/16/2004 0-20 8 105 1833.74 1/10/2011 1773.33 60.41 Open hole Chatsworth Yes •RD-93 267564.1 1785023.3 5/19/2005 0-20 8 57.45 1810.48 1/10/2011 1779.8 30.68 Open hole Chatsworth Yes •RD-94 267743.3 1784559.8 5/15/2005 0-20.5 8 35 1744.38 1/10/2011 1727.49 16.89 Open hole Chatsworth Yes •RD-95 267499.9 1784758.0 5/12/2005 0-50 8 80 1811.36 1/10/2011 1757.87 53.49 Open hole Chatsworth Yes •RD-96 267385.1 1784343.7 5/3/2006 0-20 8.625 90 1805.14 1/10/2011 1742.23 62.91 Open hole Chatsworth Yes •RD-97 267540.4 1784376.4 4/28/2006 0-20 8.625 74.5 1792.22 1/10/2011 1740.59 51.63 Open hole Chatsworth No Well Dry

RD-98 268054.1 1785567.0 6/2008 --- --- 65 1808.73 1/10/2011 1771.75 36.98 --- Chatsworth Yes • •RS-11 266864.3 1785819.5 6/10/1985 0-17.5 4 17.77 1790.39 1/10/2011 1775.76 14.63 10-17.5 Shallow well No Well Dry

RS-16 266981.3 1784220.7 6/11/1985 0-20.5 4 20.5 1811.05 1/10/2011 Dry Dry 16.5-20.5 Shallow well No Well Dry

RS-18 266661.7 1783394.0 6/12/1985 0-13 4 13 1802.86 1/10/2011 1797.04 5.82 7.5-13 Shallow well Yes •RS-23 265827.3 1783082.8 8/23/1988 0-13 4 13 1887.25 1/10/2011 Dry Dry 8-13 Shallow well No Well Dry

RS-24 267218.8 1786806.2 8/25/1988 0-8.5 4 8.5 1809.24 1/10/2011 Dry Dry 4-8.5 Shallow well No Well Dry

RS-25 268226.7 1785922.8 8/25/1988 0-13.5 4 13.5 1862.71 1/10/2011 1849.76 12.95 8.5-13.5 Shallow well Yes •RS-27 266927.6 1785133.2 8/2/1988 0-9 4 9 1804.78 1/10/2011 Dry Dry 5-9 Shallow well No Well DryRS-28 268030.1 1785310.5 8/17/1989 0-19 4 19 1786.59 2nd Qtr 2009 Capped Capped 14-19 Shallow well No Well CappedRS-54 266307.6 1783111.2 8/9/1993 0-7 6.25 38 1846.66 1/10/2011 1823.98 22.68 Open hole Shallow well No Well DryWS-07 268493.2 1787829.4 5/7/1905 --- --- 700 1826.19 1/10/2011 1767.28 58.91 --- Chatsworth Yes •Notes:

RD-21 was converted to a FLUTe Well 01/14/2003

Shaded rows were removed from sampling program.

Coordinates in NAD 1927 California V Plane

bgs - below ground surface

Dia - diameter

DTW - depth to water

DTB - depth to bottom

Qtr - quarter

FLUTe - Flexible Liner Underground Techonologies

ID - identification


Table 2 Proposed Radionuclides for Analysis


U. S. EPA Region 91 of 2 HydroGeoLogic, Inc. 3/7/2011

Symbol Radionuclide Half-Life UnitsPriority 1

Groundwater Analytes*

Priority 2 Groundwater

Analytes*Ac-227 actinium-227 21.772 Years •Ac-228 actinium-228 6.15 Hours •Ag-108 silver-108 2.37 Minutes •Ag-108m silver 108m 418 Years •Am-241 americium-241 432.6 Years •Am-243 americium-243 7,370 YearsBa-133 barium-133 10.5 Years •Ba-137m barium-137m 2.552 Minutes •Bi-210 bismuth-210 5.012 DaysBi-212 bismuth-212 60.55 Minutes •Bi-214 bismuth-214 19.9 Minutes •C-14 carbon-14 5,700 Years •Cd-113m cadmium-113m 14.1 Years •Cf-249 californium-249 351 Years •Cl-36 chlorine-36 3.01E+05 YearsCm-243 curium-243 29.1 Years •Cm-244 curium-244 18.1 Years •Cm-245 curium-245 8,500 Years •Cm-246 curium-246 4,760 Years •Cm-248 curium-248 348,000 YearsCo-60 cobalt-60 5.275 Years •Cs-134 cesium-134 2.0652 Years •Cs-137 cesium-137 30.08 Years •Eu-152 europium-152 13.537 Years •Eu-154 europium-154 8.593 Years •Eu-155 europium-155 4.753 Years •Fe-55 iron-55 2.737 YearsH-3 tritium (hydrogen-3), organic 12.32 Years •Ho-166m holmium-166m 1,230 Years •I-129 iodine-129 1.57E+07 Years •K-40 potassium-40 1.25E+09 Years •Na-22 sodium-22 2.6027 Years •Nb-94 niobium-94 2.03E+04 Years •Ni-59 nickel-59 76,000 YearsNi-63 nickel-63 100.1 YearsNp-236a neptunium-236a 1.53E+05 Years •Np-237 neptunium-237 2.14E+06 Years •Np-239 neptunium-239 2.356 Days •Pa-231 protactinium-231 32,760 Years •Pb-210 lead-210+D 22.2 YearsPb-212 lead-212 10.64 Days •


Table 2 Proposed Radionuclides for Analysis


U. S. EPA Region 92 of 2 HydroGeoLogic, Inc. 3/7/2011

Symbol Radionuclide Half-Life UnitsPriority 1

Groundwater Analytes*

Priority 2 Groundwater

Analytes*Pb-214 lead-214 26.8 Minutes •Pm-147 promethium-147 2.6234 YearsPo-210 polonium-210 138.376 DaysPu-236 plutonium-236 2.585 YearsPu-238 plutonium-238 87.7 Years •Pu-239 plutonium-239 24,110 Years •Pu-240 plutonium-240 6,563 Years •Pu-241 plutonium-241 14.29 YearsPu-242 plutonium-242 375,000 Years •Pu-244 plutonium-244 8.00E+07 YearsRa-226 radium-226 1,600 Years •Ra-228 radium-228 5.75 YearsRn-220 radon-220 55.6 SecondsRn-222 radon-222 3.8235 DaysSb-125 antimony-125 2.7586 Years •Se-79 selenium-79 2.95E+05 YearsSn-126 tin-126 2.30E+05 Years •Sr-90 strontium-90 28.8 Years •Tc-99 technetium-99 211,100 Years •Te-125m tellurium-125m 57.4 Days •Th-228 thorium-228 1.9116 YearsTh-229 thorium-229 7,880 YearsTh-230 thorium-230 75,400 YearsTh-231 thorium-231 25.52 Hours •Th-232 thorium-232 1.41E+10 YearsTh-234 thorium-234 24.1 Days •Tl-208 thallium-208 3.053 Minutes •Tm-171 thulium-171 1.92 Years •U-232 uranium-232 68.9 YearsU-233 uranium-233 1.59E+05 Years •U-234 uranium-234 245,500 Years •U-235 uranium-235 7.04E+08 Years •U-236 uranium-236 2.34E+07 Years •U-238 uranium-238 4.47E+09 Years •U-240 uranium-240 14.1 HoursY-90 yttrium-90 64.053 HoursGross Alpha Radiation N/A N/A N/A •Gross Beta Radiation N/A N/A N/A •Notes:

N/A - not applicable

* Suite may change. See Section 2.2 of the Field Sampling Plan for a discussion.

phase ii groundwater sampling addendum …...u.s. epa region 9 phase ii groundwater sampling fsp...

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