### FINA L 3 "^°'/ _SCHIBI

T 5



# PBI V 0-425 1 5 

## ADMINISTRATIV E RECOR D

TAILIN G DISPOSA L ARE A REMEDIA L INVESTIGATIO N WOR K PLA N CALIFORNI A GULC H SIT E LEADVILLE

, COLORAD O Jul y 199 1

Prepare d fo r ASARCO

, Incorporate d Leadville

, Colorad o Prepare d b y 

## Woodward-Clyd e

458 2 Sout h Ulste r Stree t Parkwa y Stanfor d Plac e 3 , Suit e 100 0 Denver

, Colorad o 8023 7 Projec t No

. 22443E-T371 0

### FINA L EXHIBI T 5



## TAILIN G DISPOSA L ARE A REMEDIA L 

## INVESTIGATIO N WOR K PLA N 

## CALIFORNI A GULC H SIT E LEADVILLE

, COLORAD O 

## Jul y 199 1

Prepared fo r ASARCO

, Incorporate d Leadville

, Colorad o Prepare d b y 

## Woodward-Clyd e

458 2 Sout h Ulste r Stree t Parkwa y Stanfor d Plac e 3 , Suit e 100 0 Denver

, Colorad o 8023 7 Projec t No

. 22443E-T371 0

### Woodward-Clyd e Consultant s

TABL E O F CONTENT S Sectio n Pag e 1. 0 INTRODUCTIO

N 1- 1 1. 1 DESCRIPTIO

N O F TAILIN G DISPOSA L AREA S 1- 2 1.1. 1 Orego n Gulc h Tailin g 1- 2 1.1. 2 Apach e Tailin g 1- 2 1.1. 3 Penros e Tailin g 1- 3 1.1. 4 Hamm' s Mil l Tailin g 1- 3 1.1. 5 Hecl a Tailin g 1- 3 1.1. 6 Malt a Tailin g 1- 4 1.1. 7 Colorad o Zin c Lea d Tailin g 1- 4 1.1. 8 Fluvia l Tailin g Deposit s 1- 4 1. 2 WOR K PLA N OVERVIE W AN D PURPOS E 1- 6 2. 0 SCOP E O F WORK 2- 1 2. 1 DAT A QUALIT Y OBJECTIVE S 2- 1 2 . 2 IDENTIFIE

D DAT A GAPS/NEED S 2- 2 2.2. 1 Geotechnica l Dat a Need s 2- 2 2.2. 2 Geochemica l Dat a Need s 2- 3 2.2. 3 Hydrogeologi c Dat a Need s 2- 3 2.2. 4 Hydrologi c Dat a Need s 2- 4 2. 3 PROPOSE D WOR K 2- 5 2.3. 1 Oregon Gulch Tailin g 2- 5 2.3. 2 Apach e Tailin g 2- 9 2.3. 3 Penros e Tailin g 2-1 4 2.3. 4 Hamm' s Mil l Tailin g 2-1 7 2.3. 5 Hecl a Tailin g 2-2 0 2.3. 6 Malt a Tailin g 2-2 4 2.3. 7 Colorad o Zin c Lea d Tailin g 2-2

8 2.3. 8 Fluvia l Tailin g Deposit s 2-31

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TABL E O F CONTENT S (Continued ) Sectio n Pag e 3 . 0 SAMPLIN

G AN D ANALYSI S PLA N 3- 1 3. 1 FIEL D SAMPLIN G PLA N 3- 1 3.1. 1 Samplin g Objectives

, Locations

, an d Frequenc y 3- 1 3.1. 2 Fiel d Procedure s 3- 2 3.1. 3 Sampl e Handling

, Documentation

, an d Analysi s 3- 3 3.1. 4 Decontaminatio n

3- 4 3 . 2 QUALIT Y ASSURANC E PROJEC T PLA N 3- 4 3.2. 1 Projec t Organizatio n 3- 4 3.2.2 Laborator y 3- 5 3.2. 3 Qualit y Assuranc e Objective s an d Qualit y Contro l 3- 5 3.2. 4 Dat a Validatio n 3- 5 3.2. 5 Fiel d Samplin g Pla n an d Standar d Operatin g Procedure s 3- 6 3.2. 6 Audits

, Nonconformances

,

an d Correctiv e Action s 3- 6 3.2. 7 Qualit y Assuranc e Report s 3- 6 4 . 0 HEALT H AN D SAFET Y PLA N 4- 1 5. 0 SCHEDUL E 5- 1 6. 0 REFERENCE

S 6- 1

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TABL E O F CONTENT S (Concluded ) LIS T O F TABLE S TABL E 2- 1 SUMMAR Y O F STATEMENT S USE D I N TH E DEVELOPMEN T O F DQO s FO R TAILIN G A T CALIFORNI A GULC H SIT E TABL E 2- 2 TAILIN G ANALYTICA L PARAMETER S TABL E 2- 3 PONDE D WATE R SAMPL E ANALYTICA

L PARAMETER S TABL E 2- 4 SURFACE WATE R SAMPLE ANALYTICA L PARAMETER S TABL E 2- 5 GROUNDWATE R

SAMPL E ANALYTICA L PARAMETER S TABL E 3- 1 ANALYSE S T O B E PERFORME D O N SPECIFI C SAMPL E TYPE S TABL E 3- 2 SAMPL E CONTAINERS

, PRESERVATIVES

, AN D HOLDIN G TIME S TABL E 3- 3 ANALYTICA

L METHOD S FO R CL P ANALYSE S O F TAILIN G A N D FOUNDATIO N SAMPLE S TABL E 3- 4 ANALYTICA

L METHOD S FOR ANALYSI S O F WATE R SAMPLE S TABL E 3- 5 TAILIN G SURFAC E SAMPL E IDENTIFICATIO

N KE Y TABL E 3- 6 TAILIN G BOREHOL E SAMPLE IDENTIFICATIO

N KE Y TABL E 3- 7 TAILIN G MONITORIN G WEL L IDENTIFICATIO

N KE Y LIS T O F FIGURE S FIGUR E 1 HAMM' S MIL L TAILIN G PENROS E TAILIN G FIGUR E 2 APACH E TAILIN G OREGO N GULC H TAILIN G FIGUR E 3 HECL A TAILIN G MALT A TAILIN G COLORAD O ZIN C LEA D TAILIN G FIGUR E 4 LOCATION

S O F POTENTIA L FLUVIA L TAILIN G DEPOSIT S FIGUR E 5 SCHEDUL E FO R IMPLEMENTATIO

N O F TAILIN G WOR K PLA N LIS T O F APPENDIXE S APPENDI X A STANDAR D OPERATIN G PROCEDURE S

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## 1. 0 INTRODUCTIO N
Thi s Tailin g Work Pla n i s on e sectio n o f th e overal l Phas e I I Remedia l Investigatio n (RI ) Wor k Plan fo r th e Californi a Gulc h Site

, Leadville

, Colorado

. Th e purpos e o f thi s wor k pla n i s t o presen t th e scop e o f th e investigatio n an d th e fiel d an d laborator y procedure s fo r th e collectio n o f dat a a t th e tailin g disposa l area s liste d below

. Ther e ar e seve n majo r tailin g disposa l area s locate d withi n th e Californi a Gulc h Site

. I n addition
, nin e location s hav e bee n identifie d a s potentia l fluvia l tailin g deposits

. Thes e area s wer e use d t o dispos e o f th e fine-graine d wast e materia l remainin g afte r millin g o f ores
. Th e tailin g materia l consist s mainl y o f pyrit e an d silicat e gangue, an d contain s metal s includin g arsenic, cadmium
, copper , iron , lead
, manganese , an d zinc

. The tailin g disposa l area s identifie d at thi s tim e fo r remedia l investigatio n are :
• Orego n Gulch Tailin g • Apach e Tailin g • Penrose Tailin g • Hamm' s Mil l Tailin g • Hecl a Tailin g • Malt a Tailin g • Colorad o Zin c Lea d Tailin g • Potentia l Fluvia l Tailin g Deposit s I f othe r tailin g pile s o r fluvia l tailin g deposit s ar e identifie d throughou t th e RI

, thi s wor k pla n shoul d be modifie d accordingly

. Th e dat a collecte d previousl y hav e bee n classifie d int o fou r categories : geotechnical
, geochemical
, hydrogeologic
, an d hydrologic

. Th e dat a t o b e collecte d durin g thi s RI are identifie d i n Sectio n 2.3 , Propose d Work

.

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1 . 1 DESCRIPTIO

N O F TAILIN G DISPOSA L AREA S 

### Th e location s o f th e tailin g disposa l area s liste d abov e ar e show n i n Figure s 1 throug h 3

. Brie f description s o f eac h tailin g are presente d below

. 1.1. 1 Orego n Gulc h Tailin g 

### The Orego n Gulch tailin g i s locate d 1/ 2 mil e sout h o f Leadvill e (Figur e 1 ) an d cover s approximatel y 8. 3 acre s nea r th e headwater s o f Orego n Gulch

. Th e surfac e o f th e pon d support s n o vegetation

. Surfac e wate r fro m precipitatio n an d surfac e runof f withi n Orego n Gulc h i s ponde d on th e tailin g surface

. Th e tailin g i s impounde d b y a curve d embankment

. Tw o branche s o f th e embankmen t tren d northwest an d southwest wit h 

### length s o f 90 0 fee t an d 70 0 feet
, respectively

. Th e embankmen t ha s a maximu m height


### o f abou t 7 0 fee t an d slope s a t approximatel y 1.75:1.0 , horizonta l t o vertical

. Th e pon d contain s a n estimate d 600,00 0 ton s o f tailin g (Colorad o Departmen t o f La w (CDL)

, 1986a)

. A quic k remedia l actio n wa s implemente d b y Res-ASARC O i n th e fal l o f 199 0 (Sit e Improvemen t Wor k Plan

, Res-ASARC O 1990a)

. Thi s remedia l action consiste d

o f the constructio n o f a drainag e ditc h upgradien t o f the tailin g t o divert surfac e wate r runof f t o th e existin g ditch southwes t o f th e tailing

. 1.1. 2 Apach e Tailin g Th e Apach e tailin g i s locate d i n Californi a Gulch approximatel y 1/ 4 mil e downstrea m o f th e surg e pon d fo r th e Ya k Tunne l Operabl e Uni t an d adjacen t t o Leadvill e (Figur e 1)

. Th e pil e consist s o f a mai n impoundment surrounded b y embankment s an d 

### tw o smalle r pile s t o th e wes t coverin g a tota l o f abou t 7. 9 acre s an d containin g a n estimate d 936,00 0 ton s o f materia l (CD L 1986b)

. Th e thicknes s o f th e tailin g i n th e mai n impoundmen t average s 3 5 feet

. Th e embankmen t ha s a maximu m heigh t o f abou t 5 0 fee t o n the sout h sid e o f the mai n impoundment

. Surfac e water fro m precipitatio n i s ponde d o n th e mai n impoundment

. Th e tailin g wa s deposite d acros s th e Californi a Gulc h strea m channel

. The stream i s conveye d beneat h the tailin g b y tw o burie d pipe s o n th e sout h sid e o f th e mai n impoundment

.

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1.1. 3 Penros e Tailin g 

### Th e Penros e tailin g i s locate d a t th e wes t en d o f Stra y Hors e Gulc h withi n residentia l Leadvill e (Figur e 2)

. Th e pil e cover s approximatel y 3 acre s betwee n Eas t 3rd an d Eas t 4t h Streets

, i s irregula r i n shap e an d thickness
, an d reache s a maximu m height o f approximatel y 50 feet

. 1.1. 4 Hamm' s Mil l Tailin g Th e Hamm' s Mil l tailin g i s locate d i n Stra y Hors e Gulch alon g 5t h Stree t a t th e eas t edg e o f residentia l Leadvill e (Figur e 2)

. Th e tailin g consist s o f a n irregular-shape d pil e coverin g approximatel y 7. 5 acre s an d reachin g a maximu m height o f approximatel y 5 0 feet

. 1.1. 5 Hecl a Tailin g Th e Hecl a tailing
, active unti l 1986 , i s locate d approximatel y 1/ 2 mil e northwes t o f Stringtown

. Tailin g wa s deposite d i n seve n impoundments
, rangin g i n siz e fro m approximatel y 1 t o 1 0 acre s (Figur e 3)

. Approximat e area s an d thicknesse s o f th e seve n tailin g disposa l area s a s numbere d i n Figur e 3 are :

• Are a No

. 1 : abou t 2. 5 acre s i n size ; maximu m thicknes s o f approximatel y 1 5 fee t • Are a No

. 2 : abou t 5 acre s i n size ; maximu m thicknes s o f approximatel y 2 5 fee t • Are a No

. 3 : 1 0 acre s i n size ; maximu m thicknes s o f approximatel y 3 0 fee t • Are a No

. 4 : 1 acr e i n size ; maximu m thickness o f approximatel y 1 0 fee t • Are a No

. 5 : 4. 5 acre s i n size ; maximu m thicknes s o f approximatel y 3 0 fee t • Are a No

. 6 : 3. 5 acre s i n size ; maximu m thicknes s o f approximatel y 1 5 fee t • Are a No

. 7 : tw o irregular-shape d pile s coverin g 2. 5 acre s an d reachin g abou t 1 0 fee t i n height

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1.1. 6 Malt a Tailin g Th e Malt a tailin g i s locate d approximatel y 1/ 2 mil e wes t o f Stringtown

, nea r th e Hecl a tailin g (Figur e 3)

. Thi s tailin g disposa l sit e wa s use d b y Leadvill e Gol d an d Silve r Corporatio n unti l 1986

. Th e sit e consist s o f on e smal l impoundmen t approximatel y 1. 5 acre s i n siz e an d 5 fee t i n thickness

. 1.1. 7 Colorad o Zin c Lea d Tailin g Th e Colorad o Zin c Lea d Tailin g i s locate d eas t o f th e Arkansa s Valley sla g pile
, immediatel y nort h o f Stringtow n acros s Californi a Gulch (Figur e 3)

. Th e sit e consist s o f on e smal l impoundmen t approximatel y 1. 5 acre s i n siz e an d 5 fee t i n thickness

. 1.1.8 Fluvia l Tailin g Deposit s Nin e location s hav e bee n identifie d a s potentia l fluvia l tailin g deposit s b y analysi s o f 

### aeria l photographs

. Th e location s o f thes e deposit s ar e show n i n Figur e 4

. Brie f description s o f eac h o f th e identifie d location s ar e presente d below : Fluvia l Sit e # 1 Fluvia l Sit e # 1 i s locate d southwest o f th e L a Plat a Sla g Pil e an d northeast o f Stringtown

, approximatel y a t th e confluenc e o f Pawne e Gulc h an d Californi a Gulch

. The sit e run s lengthwis e alon g the sout h sid e o f Californi a Gulc h and

cover s approximatel y 1 0 acres
. N o vegetatio n i s apparen t fro m aeria l photographs

. Fluvia l Sit e # 2 Fluvia l Sit e # 2 i s locate d nort h o f Stringtown

, jus t eas t o f th e Arkansa s Valle y slag

. I t i s bounde d b y th e railroa d track s t o th e nort h an d Californi a Gulc h t o th e south

. Th e sit e cover s approximatel y 1 0 acres , support s n o vegetation , an d surround s th e Colorad o Zin c Lea d tailin g impoundment

.

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Fluvia l Sit e # 3 Fluvia l Sit e # 3 i s locate d jus t sout h o f Highwa y 2 4 on th e sout h sid e o f Leadville

, approximatel y a t th e confluenc e o f Orego n Gulc h an d Californi a Gulch

. Th e 

### deposi t ran s lengthwis e alon g Californi a Gulch and cover s approximatel y 4 acres
. Th e sit e support s spars e vegetatio n o n bot h side s o f Californi a Gulch

. Fluvia l Sit e # 4 Fluvia l Sit e # 4 i s locate d alon g uppe r Californi a Gulch

, wes t o f th e Or o townsit e i n th e vicinit y o f th e A- Y an d Minni e Mines

. Th e majorit y o f th e site, whic h i s 7. 5 acres , i s locate d o n th e north-wes t sid e o f Californi a Gulch

. Fro m aeria l photographs
, i t appear s tha t Fluvia l Sit e # 4 support s littl e o r no vegetation

. Fluvia l Sit e # 5 Fluvia l Sit e # 5 i s locate d alon g uppe r Californi a Gulch

, betwee n Pigtail Gulc h



### an d White' s Gulch

. Th e sit e ran s lengthwis e alon g th e sout h sid e o f Californi a Gulch an d cover s approximatel y 3. 5 acres
. Fro m aeria l photographs
, i t appear s that th e sit e support s som e spars e vegetation

. Thi s sit e ma y b e tailin g deposit s fro m th e Printer Bo y stam p mill
, whic h wa s th e firs t mil l t o operat e i n th e area
. Fluvia l Sit e # 6 

### Fluvia l Sit e # 6 i s locate d i n th e depressio n betwee n Apach e Tailin g an d th e Surg e Pond

, withi n Californi a Gulch

. The sit e cover s approximatel y 5 acre s an d support s som e vegetation

. Fluvia l Sit e # 7 

### Fluvia l Sit e # 7 i s locate d i n lowe r Malt a Gulch an d ran s southeas t alon g th e railroa d tracks

. Th e sit e cover s approximatel y 3 4 acre s an d support s a significan t
amoun t o f vegetatio n o n th e downstrea m end

. Base d o n a revie w o f aeria l 

### photographs
, i t appear s tha t th e upstrea m en d ha s n o vegetation

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Fluvia l Sit e # 8 Fluvia l Sit e # 8 encompasse s lowe r Californi a Gulch downstrea m o f th e Arkansa s Valle y sla g pil e an d th e floodplai n deposit s alon g th e Arkansa s Rive r fro m Californi a Gulc h sout h t o th e stud y are a boundary

. Th e sit e cover s approximatel y 11 5 acre s an d consist s o f braide d channe l deposit s alon g bot h side s o f Californi a Gulc h and th e Arkansa s River

. Vegetatio n i s distribute d sparsel y on th e deposits

. Thes e deposit s ma y b e relate d t o hydrauli c minin g o f Californi a Gulc h befor e th e introductio n o f undergroun d minin g an d milling i n th e distric t an d ma y b e o f substantiall y differen t characte r tha n th e othe r fluvia l tailin g site s identified

. Fluvia l Sit e # 9 Fluvia l Sit e # 9 i s locate d alon g uppe r Stray Hors e Gulc h abov e th e Adelaid e Mine

. Th e sit e extend s t o th e eas t alon g Stra y Hors e Gulch fro m th e Adelaid e Min e an d cover s approximatel y 25 acres
. Extensiv e vegetatio n i s supporte d o n thi s area , whic h ma y b e th e ol d Adelaid e townsite

. N o mil l site s hav e bee n identifie d i n th e immediat e area
. 1. 2 WOR K PLA N OVERVIE W AN D PURPOS E Thi s wor k pla n (Tailin g Wor k Plan ) fo r th e investigatio n o f tailin g disposa l site s i s par t
o f th e integrated
, site-wide
, Phas e I I Remedia l Investigatio n (RI ) fo r th e Californi a Gulc h Site

. Th e wor k pla n i s intende d t o b e a guid e t o th e fiel d activitie s an d laborator y analyses fo r th e tailin g investigations

. Preliminar y dat a necessar y t o conduct a feasibilit y stud y (FS ) fo r th e developmen t o f remedia l alternative s an d t o addres s th e huma n healt h

an d environmenta l risk s associate d wit h the tailin g disposa l sites wil l b e collecte d durin g 

### th e RI

. Thi s wor k pla n review s th e dat a gaps/need s identifie d durin g th e preparatio n o f th e Draf t Phas e I I R I Scopin g Document

, Californi a Gulch Site

, Leadville

, Colorad o (Res-ASARC O 1991a)

. Wor k propose d fo r eac h tailin g disposa l are a identifie d fo r remedia l investigatio n i s presente d i n Subsectio n 2.3

. The Samplin g an d Analysi s Pla n (SAP ) applicabl e t o thi s investigatio n i s presente d i n Sectio n 3.0

. Standar d Operatin g
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Procedure s fo r th e propose d wor k ar e reference d i n th e SA P and/o r include d i n Appendi x A

.

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2.0 SCOP E O F WOR K
The wor k t o b e conducte d unde r thi s wor k pla n include s th e collectio n o f representativ e sample s fo r geochemica l and geotechnica l analyses
, and collectio n o f hydrogeologi c and hydrologi c data
, includin g surfac e wate r an d groundwate r qualit y sample s fro m eac h tailin g disposa l area
. This wor k pla n i s base d o n th e investigatio n objective s presente d i n th e Draf t Phas e I I Remedial Investigatio n (RI ) Scopin g Documen t (Res-ASARCO 199la)

. Specifi c fiel d dat a collectio n activitie s ar e outline d fo r eac h tailin g pil e o r deposit

. Informatio n collecte d unde r thes e activitie s wil l b e supplemente d b y tha t collecte d fo r th e surfac e water/sedimen t an d groundwate r dat a collectio n programs , describe d i n separat e wor k plans

. 2 . 1 DAT A QUALIT Y OBJECTIVE S Dat a qualit y objective s (DQOs ) ar e define d a s statement s whic h specif y th e quality
, quantity , an d analytica l leve l o f th e dat a require d t o suppor t decision s regardin g a particula r site

. DQO s for th e tailin g disposa l area s are establishe d t o ensur e tha t th e dat a collecte d are o f sufficien t quantit y an d qualit y for th e intende d uses
. Dat a on tailin g wil l b e use d fo r th e following :


### • Baselin e Ris k Assessmen t • Sit e Characterizatio n (includin g Healt h an d Safety ) • Screenin g an d Evaluatio n o f Remedia l Alternative s Onc e th e remedia l alternativ e i s selected
, th e dat a wil l als o b e use d for remedia l desig n an d monitorin g durin g remedia l action

. Additiona l informatio n may , however
, b e require d fo r remedial desig n an d fo r th e implementatio n o f th e remedia l actio n selected

. Dat a need s an d use s o f th e dat a t o b e collecte d fo r thi s wor k pla n ar e summarize d i n Tabl e 2-1

. Th e dat a t o b e collecte d fo r thi s Wor k Pla n wil l b e o f Analytica l Leve l H I and/o r IV

. Chemica l analyses wil l b e performe d b y Contrac t Laborator y Progra m (CLP ) method s
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### Woodward-Clyd e Consultant s (EP A 1988 ) an d USEP A Method s fo r Chemical Analysi s o f Wate r an d Waste s (EP A 1983)

. Detectio n limit s an d analytica l method s ar e presente d i n Table s 3- 3 an d 3-4

. Geotechnica l dat a wil l b e o f the typ e and quantit y necessar y fo r a feasibilit y study
, and wil l b e conducte d usin g America n Societ y fo r Testin g an d Material s (ASTM ) o r equivalent procedures

. 2 . 2 IDENTIFIE

D DAT A GAPS/NEED S Previou s investigation s conducte d o n tailin g disposa l area s withi n th e Californi a Gulc h Sit e wer e reviewe d durin g th e scopin g o f th e R I t o evaluat e th e quantit y an d qualit y o f th e variou s type s o f informatio n availabl e an d th e dat a gap s presen t fo r eac h tailin g pile

. Th e dat a revie w fo r th e tailin g pile s i s presente d i n th e Draf t Phas e I I R I Scopin g Documen t (Res-ASARCO 19 9 la)

. Th e potentia l fluvia l tailin g deposit s identifie d i n Subsectio n 1.1. 8 hav e no t bee n previousl y investigated

. Th e dat a needs
, based on th e dat a gap s identifie d i n th e Scopin g Document

, ar e classifie d i n fou r categories : geotechnical
, geochemical
, hydrogeologic
, an d hydrologic

. Th e hydrogeolog y o f th e potentia l fluvia l tailin g deposit s wil l b e investigate d unde r th e Hydrogeologi c Wor k Pla n (Res-ASARC O 1991b)

. 2.2. 1 Geotechnica l Dat a Need s T h e additiona l geotechnica l informatio n neede d fo r th e tailin g area s fo r th e purpose s identifie d i n Sectio n 2. 1 consist of :


### • Geotechnica l propertie s o f tailin g an d foundatio n materia l (particl e siz e distribution
, wate r content , Atterber g limits
, density
, compressibility
, permeability
, an d strength )

• Variabilit y o f th e tailin g physica l propertie s includin g particl e siz e variatio n i n surficia l tailin g materia l t o asses s potentia l wind-blow n 

### contaminan t propertie s

• Locatio n o f th e piezometri c surfac e withi n th e tailin g an d th e foundatio n 

### material fo r stabilit y an d settlemen t analyse s
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• Locatio n o f contact s betwee n th e tailin g an d foundatio n materia l an d dept h t o foundatio n 2.2. 2 Geochemica l Dat a Need s Th e additiona l geochemica l dat a neede d consis t of :

• Concentration

s o f metal s o f concer n o n th e surfac e an d a t dept h withi n th e tailin g


### • Concentration

s o f metal s i n th e foundatio n materia l

• Leachin g potentia l o f th e tailin g b y EP A Metho d 131 2 withi n th e rang e o f groundwate r fluctuation s t o supplemen t th e availabl e E P toxicit y dat a

• Soil nutrien t concentration s t o suppor t vegetatio n 2.2. 3 Hydrogeologi c Dat a Need s Th e hydrogeologi c dat a neede d t o evaluat e potentia l impact s o n groundwate r fro m th e tailin g pile s include :


### • Groundwate r

qualit y withi n and/o r beneat h th e tailin g

• Groundwate r

qualit y immediatel y upgradien t fro m th e tailin g pile s

• Groundwate r

qualit y immediatel y downgradient fro m th e tailin g pile s Th e groundwate r dat a collecte d fo r eac h tailin g pil e wil l als o b e supplemente d b y th e dat a collecte d unde r th e Hydrogeologi c Wor k Pla n (ASARC O 19 9 Ib)

. Th e groundwate r qualit y withi n the tailin g wil l b e compare d wit h the groundwate r qualit y immediatel y upgradien t an d downgradien t fro m th e tailin g an d th e result s fro m leachin g test s t o asses s th e curren t impac t and potentia l lon g ter m impact s o f th e tailin g on groundwate r quality

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2.2. 4 Hydrologi c Dat a Need s T h e hydrologi c dat a neede d t o suppor t thi s investigatio n consist of :

• Drainag e basi n characteristic s fo r eac h o f th e subdrainages identifie d fo r th e tailin g disposa l areas , includin g siz e o f th e watershed
, precipitatio n data
, soi l cover , annua l runof f data
, an d infiltratio n rates

.
• Qualit y and quantit y o f wate r ponde d o n to p o f eac h tailing
, i f present

. Th e qualit y an d quantit y o f thi s wate r i s expecte d t o var y seasonally

.
• Qualit y and quantit y o f surfac e water

. Surfac e wate r sample s wil l b e collecte d a t site s locate d upgradien t an d downgradien t o f eac h tailin g pil e o r deposi t that i s investigated
, i f flo w i s present

. A fiel d reconnaissanc e o f th e tailin g site s wil l b e conducte d prio r t o collectin g surfac e wate r sample s t o determin e th e appropriat e location s fo r th e surfac e wate r samplin g sites

. The qualit y and the quantit y o f thes e water s ar e know n t o var y seasonally ; therefore
, wate r qualit y dat a obtaine d durin g th e sprin g ice-of f samplin g even t unde r th e curren t Surfac e Wate r Progra m (Surfac e Water

, Be d Material

, an d Aquati c Ecosyste m Dat a Collectio n Progra m Work Plan

, Californi a Gulc h Site

, Leadville

, Colorado : Res-ASARCO

, 1991c ) wil l als o b e use d t o characteriz e th e qualit y o f wate r i n identifie d ephemera l flo w reache s eithe r upgradien t o r downgradien t o f th e tailin g disposa l areas
. Flo w dat a generate d unde r th e Surfac e Wate r Progra m (Res-ASARC O 19 9 Ic ) wil l b e use d i n th e estimatio n o f probabl e maximu m floods

.
• Precipitatio n dat a an d runof f characteristi c informatio n wil l b e compiled
, reviewed
, an d summarize d t o asses s a probabl e maximu m flood
, desig n stor m (50 0 yea r event)

, an d exten t o f floodplain s fo r thes e events

.

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2. 3 PROPOSE D WORK 

### Thi s sectio n detail s th e propose d dat a collectio n activitie s relativ e t o eac h o f th e tailin g disposa l sites

. 2.3. 1 Orego n Gulc h Tailin g Th e investigatio n o f th e Orego n Gulc h tailin g wil l consis t o f th e collectio n o f surfac e and subsurfac e tailin g an d foundatio n samples ; installatio n o f monitorin g well s an d collectio n 

### o f groundwate r samples ; collectio n o f surfac e water sample s fro m wate r ponde d o n th e tailin g pile
, an d surfac e wate r sample s fro m sites upgradien t an d downgradien t o f th e tailing ; analytica l testing ; an d geotechnica l laborator y testing

. Specifically

, thes e activitie s wil l consis t of :

• Engineering/Geologi c

sit e reconnaissance

. A sit e reconnaissanc e wil l b e conducte d t o estimat e the siz e and thicknes s o f the pile
, and identif y surfac e features
, genera l sit e conditions
, an d potentia l samplin g locations

.
• Collectio n an d analysi s o f surfac e tailin g samples

. Surfac e sample s wil l b e collecte d fro m th e uppe r 2 inche s o f th e tailing

. Te n sample s wil l b e collecte d fro m eac h o f th e followin g area s o f th e impoundment

. Slopin g fac e o f tailin g impoundmen t Crest o f tailin g embankmen t (at the to p o f the impoundmen t an d withi n 10 0 fee t o f th e embankmen t crest ) 

### Fro m th e tailin g surfac e mor e tha n 10 0 fee t awa y fro m th e embankmen t cres t Th e te n sample s fro m eac h o f thes e area s wil l b e composite d and screened throug h a No

. 8 0 mesh

. Th e initia l weigh t o f th e sampl e an d th e weigh t
o f th e materia l passin g th e No

. 8 0 mes h wil l b e recorded

. Th e coars e fractio n wil l b e discarded

. Th e fin e fraction s remainin g wil l b e analyze d

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### Woodward-Clyd e Consultant s fo r th e parameters liste d fo r surfac e tailin g i n Tabl e 2-2

. Particl e siz e analysi s wil l b e performe d o n thes e sample s b y AST M D42 1 an d D42 2 

### methods

. Collectio n an d analysi s o f fou r surfac e water samples

. On e surfac e wate r sampl e wil l b e collecte d fro m the water ponde d o n the tailing ; tw o sample s wil l b e collecte d fro m the wate r upgradien t and downgradien t o f th e tailing
, i f present ; an d on e sampl e wil l b e collecte d a t sit e OG- 1 locate d at th e confluenc e o f Californi a an d Orego n Gulches

. Surfac e wate r sample s wil l b e collecte d b y th e method s describe d i n SO P No

. 2A

, Surfac e Wate r Sampl e Collectio n (Res-ASARC O 19 9 Ic)

. Surfac e wate r flo w measurement s wil l b e performe d b y th e method s presente d i n SO P N o

. 1A

, Surfac e Wate r Flo w Measurement (Res-ASARC O 1991c)

. Th e quantit y o f ponde d wate r wil l b e estimated

. The sampl e o f ponde d wate r wil l b e analyze d fo r th e parameters liste d i n Tabl e 2-3

. Sample s collecte d fro m site s upgradien t an d downgradien t o f th e tailin g wil l b e analyze d fo r the parameter s liste d i n Tabl e 2-4

. Wate r qualit y and flo w dat a collecte d

a t sit e OG- 1 unde r the curren t Surfac e Wate r Progra m (Res-ASARC O 1991c ) wil l als o b e used

. Drillin g o f 9 tes t hole s t o foundatio n material wit h samplin g fro m th e to p 2 feet
, a t abou t 5-foo t intervals
, an d a t change s i n materia l identifie d durin g drilling

. Tw o o f the test hole s wil l b e complete d alon g the tailin g 

### embankmen t Thre e tes t hole s wil l b e complete d withi n th e tailin g impoundmen t On e test hol e wil l b e complete d a t th e to e o f th e tailin g 

### embankment

.

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On e tes t hol e wil l b e complete d upgradien t o f th e tailin g impoundment

. Two tes t hole s wil l b e complete d downgradien t o f th e to e o f 

### the tailin g embankment

. The location s o f the tes t holes wil l b e establishe d i n the fiel d base d o n the sit e reconnaissance

. Som e gradin g ma y b e require d t o acces s selecte d locations

. The foundatio n materia l wil l b e drille d t o a dept h o f 2 5 fee t o r 

### unti l bedroc k i s reached
, whicheve r i s less

. Th e maximu m dept h o f drillin g i s estimate d t o b e les s tha n 10 0 feet

. Disturbe d an d relativel y 

### "undisturbed " sample s i n th e tes t hole s wil l b e collecte d usin g Shelb y tubes
, a n Osterber g sampler
, spli t spoon s (Standar d Penetratio n Test s (SPT) ) o r a Californi a Sample r (SO P Tailin g No

. 1)

. Wate r level s wil l b e measured i n tes t hole s durin g drillin g an d 4 8 hour s afte r drillin g 

### completio n t o allo w th e wate r level s t o stabilize

. Selecte d tes t hole s wil l be complete d a s monitorin g wells

. In-sit u permeabilit y test s (slu g tests ) 

### wil l b e performe d i n selecte d test holes

. Al l tailin g an d foundatio n sample s collecte d i n on e selecte d borin g a t abou t 5-foo t interval s wher e th e tailin g i s nea r it s maximu m thicknes s wil l b e analyze d fo r th e parameter s liste d i n Tabl e 2-2

. This borin g wil l b e designate d i n th e fiel d b y agreemen t betwee n ASARC O an d EPA

. Multipl e sample s wil l b e kep t t o permi t testin g o f engineerin g an d chemica l propertie s a t th e sampl e dept h a s needed

. Additiona l sample s fo r chemica l analyse s wil l b e selecte d fro m thos e sample s collecte d a t 5

- foo t interval s i n th e remainin g boring s withi n th e tailing
, a s follows : Withi n 5 fee t abov e groundwate r i n the tailin g i f the groundwate r i s a t a dept h greate r tha n 1 0 fee t Withi n 5 fee t belo w groundwate r

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Withi n 5 fee t abov e th e foundatio n materia l i f th e vertica l distanc e betwee n groundwate r an d th e foundatio n materia l i s greate r tha n 1 0 fee t Within th e foundatio n materia l approximatel y 5 fee t below 

### th e tailin g Onl y one sampl e fro m belo w groundwate r i n the downgradien t tes t hole s wil l b e analyzed

. EP A Metho d 131 2 leachin g procedur e wil l b e use d t o evaluat e th e leachin g o f metal s fro m th e tailin g sample s collecte d withi n th e tailing

.
• Th e sample s fro m th e tes t hole s wil l be teste d fo r geotechnica l properties

. T h e testin g ma y includ e th e following : Moistur e content : AST M D221 6 We t an d dr y densities : AST M D221 6 Particl e siz e distribution : AST M D42 1 an d D42 2 Atterber g limit s (liqui d limi t an d plasticit y index) : AST M D431 8 Specifi c gravity : AST M D85 4 Consolidation : AST M D243 5 Permeability : AST M D508 4 Unconfine d compressio n strength : AST M D216 6 Triaxia l shea r strength : U S Corp s o f Engineer s (USCE ) E M 1110-2-190 6 Th e specifi c geotechnica l testin g progra m wil l b e establishe d base d o n th e 

### type s o f material s encountered
, sample s recovered
, an d engineerin g judgment

.
• A composit e o f th e sample s collecte d fro m th e to p 2 fee t i n th e tes t hole s wil l b e analyze d fo r th e nutrient s liste d i n Tabl e 2-2

.

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### Woodward-Clyd e Consultant s

• Installatio n an d samplin g o f 8 monitorin g wells

. Tw o tes t hole s locate d alon g th e embankmen t crest , tw o tes t hole s withi n th e tailin g impoundment
, th e tes t hol e upgradien t o f th e tailin g impoundment
, th e 

### tes t hol e a t th e toe o f th e tailin g embankment
, an d th e tw o tes t hole s downgradien t o f th e tailin g impoundmen t wil l b e complete d a s monitorin g wells

. Th e monitorin g well s withi n th e tailin g wil l b e screened a t variou s 

### depth s nea r th e bas e o f th e tailing

. Th e monitorin g well s upgradien t an d downgradien t o f th e tailin g pil e wil l b e installe d wit h a 10-foo t screene d interva l withi n the alluvium

. Fiv e fee t o f scree n wil l remai n abov e the wate r table

. The monitorin g well s wil l b e develope d and sampled
, and the sample s wil l b e analyze d fo r th e parameter s liste d i n Tabl e 2-5

.
• Dat a concernin g the drainag e basi n characteristics
, annua l precipitatio n an d runoff
, soi l cover , an d infiltratio n rate s wil l b e compile d fro m existin g sources
. Contributin g an d noncontributin g watershe d area s wil l b e 

### delineate d o n U.S

. Geologica l Surve y 7 1/ 2 minut e topographica l map s o f th e area
. Precipitatio n dat a wil l b e compile d fro m th e Leadvill e precipitatio n gag e record s an d th e Precipitatio n Frequenc y Atla s o f th e Wester n Unite d State s (NOA A 1973)

. Soil distributio n map s (Soil Conservatio n Servic e an d equivalent ) wil l b e reviewe d t o interpre t soi l type s an d characteristics

. Annua l runof f wil l b e estimate d fro m th e probabl e maximu m precipitatio n estimate s give n i n NOA A (198 4 an d 1988)

. Infiltratio n rate s wil l b e estimate d on th e basi s o f precipitatio n data
, soi l cover , and runof f data

. 2.3. 2 Apach e Tailin g The investigatio n o f the Apach e tailin g wil l consis t o f the collectio n o f surfac e and subsurfac e tailin g an d foundatio n samples ; installatio n o f monitorin g well s an d collectio n o f groundwate r samples ; collectio n o f surfac e wate r samples ; analytica l testing ; an d geotechnica l laborator y testing

. Specifically

, thes e activitie s wil l consis t of :

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• Engineering/Geologi c

sit e reconnaissance

. A sit e reconnaissanc e wil l b e conducte d t o estimat e the siz e and thickness o f the tailin g and identif y 

### surfac e features
, genera l sit e conditions
, an d potentia l samplin g locations

.
• Collectio n an d analysi s o f surfac e tailin g samples

. Surfac e sample s wil l b e collecte d fro m th e uppe r 2 inche s o f th e tailing

. Thre e composit e sample s 

### wil l b e collected

. Eac h o f thes e sample s wil l b e a composit e o f te n sample s collecte d t o represen t loos e surfac e tailing
, cemente d surficia l tailin g (crust)

, an d loos e tailin g belo w th e thi n surficia l crust

. Particl e siz e analysi s wil l b e performe d o n thes e sample s b y AST M method s D42 1 an d D422

. Th e sample s wil l b e screened throug h a No

. 8 0 mes h an d th e coars e fraction s discarded

. Th e initia l weigh t o f th e sampl e an d th e weigh t o f th e materia l passin g th e No

. 8 0 mes h wil l b e recorded

. Th e fin e 

### fraction s wil l b e analyze d fo r th e parameter s liste d fo r surfac e tailin g i n Tabl e 2-2

.
• Collectio n an d analysi s o f thre e surfac e wate r samples

. On e surfac e wate r sampl e wil l b e collecte d fro m th e wate r ponde d on th e tailing
, and tw o sample s wil l b e collecte d fro m wate r flowin g upgradien t an d downgradien t
o f th e Apach e tailing

. Surfac e water flo w wil l b e measure d an d th e quantit y o f ponde d wate r wil l b e estimated

. Th e ponde d water sampl e wil l b e analyze d fo r th e parameter s liste d i n Tabl e 2-3

. Sample s collecte d fro m site s upgradien t an d downgradien t o f th e tailin g wil l b e analyze d fo r th e parameter s liste d i n Tabl e 2-4

. On e ne w surfac e wate r samplin g sit e wil l b e selecte d i n Californi a Gulc h upgradien t fro m th e Apach e tailing

. Sit e CG-3

, whic h i s use d i n the curren t Surfac e Wate r Program (Res

- ASARC O 1991c)

, wil l b e use d fo r th e downgradien t samplin g sit e unles s a mor e suitabl e sit e ca n b e locate d close r t o th e tailing

.
• Drillin g o f u p t o 1 2 tes t holes t o foundatio n material wit h samplin g fro m 

### th e to p 2 feet
, a t abou t 5-foo t intervals
, an d a t change s i n materia l identifie d durin g drilling

.

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Fiv e tes t hole s wil l b e complete d alon g th e embankmen t o f th e mai n tailin g pil e On e test hol e wil l b e complete d withi n th e mai n tailin g impoundmen t Two tes t hole s wil l b e complete d withi n th e two smalle r pile s locate d wes t o f th e mai n impoundmen t One tes t hol e wil l b e drille d upgradien t o f the tailin g impoundment
, i f necessar y Thre e tes t hole s wil l b e drille d downgradien t o f th e tailin g pile s i n Californi a Gulc h i f necessar y Th e location s o f th e tes t hole s wil l b e establishe d i n th e fiel d based o n th e sit e reconnaissance

. Suitabl y constructe d existin g monitorin g well s i n Californi a Gulc h ma y b e utilize d fo r th e upgradien t an d downgradien t tes t holes
, i f appropriate

. Som e gradin g ma y b e require d t o acces s selecte d locations

. Foundatio n materia l wil l b e drille d t o a dept h o f 2 5 fee t or unti l bedroc k i s encountered
, whicheve r i s less

. Th e maximu m dept h o f drillin g i s estimate d t o b e les s tha n 8 0 feet

. Disturbe d an d relativel y "undisturbed " sample s i n the tes t hole s wil l b e collecte d usin g shelb y tubes
, 

### a n Osterber g sampler
, spli t spoons (SPT)

, o r a Californi a drive sampler

. Wate r level s wil l b e measure d i n tes t hole s durin g drillin g an d 4 8 hour s afte r drillin g completio n t o allo w fo r stabilizatio n o f wate r levels

. Selecte d tes t holes wil l b e complete d a s monitorin g wells

. In-sit u permeabilit y test s (slu g tests ) wil l b e performe d i n selecte d tes t holes

.
• Al l tailin g an d foundatio n sample s i n on e selecte d tes t hol e a t abou t 5-foo t 

### interval s withi n th e mai n pil e wil l b e analyze d for th e chemica l parameters liste d i n Tabl e 2-2

. Thi s tes t hol e wil l b e selecte d i n th e fiel d b y agreemen t betwee n EP A and ASARCO

. Multipl e sample s wil l b e kep t t o permi t testin g o f engineerin g and chemica l propertie s a t th e sampl e 22443-22327/R14. 2 7-30-91/RPT/ 5 2-1 1

### Woodward-Clyd e Consultant s dept h a s needed

. Additiona l sample s fo r chemica l analyse s wil l b e selecte d fro m thos e sample s collecte d a t 5-foo t interval s i n th e remainin g boring s withi n the tailing
, a s follows : 

### Withi n 5 fee t abov e groundwate r i n th e tailin g i f th e groundwate r i s a t dept h greate r tha n 1 0 fee t Withi n 5 fee t belo w groundwate r Withi n 5 fee t abov e th e foundatio n materia l i f th e vertica l distanc e betwee n groundwate r an d the foundatio n materia l i s greater tha n 1 0 fee t Withi n th e foundatio n materia l approximatel y 5 fee t belo w th e tailin g Onl y on e sampl e fro m belo w groundwate r i n th e downgradien t tes t hol e wil l b e analyzed

. EP A Metho d 131 2 leachin g procedur e wil l b e use d t o evaluat e th e leachin g o f metal s fro m th e tailin g sample s collecte d withi n th e tailing

. Sample s fro m th e test hole s wil l b e teste d fo r geotechnica l properties

. Th e testin g ma y include : Moistur e content: AST M D221 6 We t an d dr y densities : AST M D221 6 Particl e siz e distribution : AST M D42 1 an d D42 2 Atterber g limit s (liqui d limi t an d plasticit y index) : ASTMD431 8 Specifi c gravity : AST M D85 4 Consolidation : AST M D243 5 Permeability : AST M D508 4

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### Woodward-Clyd e Consultant s Unconfine d compressio n strength : AST M D216 6 

### Triaxia l shea r strength : USC E E M 1110-2-190 6 The specifi c geotechnica l testin g progra m wil l b e establishe d base d o n th e type s o f material s encountered
, sample s recovered
, an d engineerin g judgment

.
• A composit e o f sample s fro m the to p 2 fee t o f tailin g i n the tes t hole s wil l 

### b e analyze d fo r th e nutrient s liste d i n Tabl e 2-2

.
• Installatio n and samplin g o f u p t o 8 monitorin g wells

. Tw o test hole s withi n th e mai n tailin g pile
, an d th e tes t hole s i n th e smalle r 

### impoundment s wil l b e complete d a s monitorin g wells

. Th e monitorin g well s withi n th e tailin g wil l b e screene d a t variou s depth s nea r th e bas e o f th e tailing

. Th e thre e downgradien t tes t hole s an d on e upgradien t tes t hol e wil l b e complete d a s monitorin g wells
, unles s existin g monitorin g well s ca n b e utilized

. Thes e well s wil l b e installe d wit h a 10-foo t screened interval
, wit h 5 fee t o f scree n remainin g abov e th e wate r tabl e i n th e alluvium

. Th e monitorin g well s wil l b e develope d an d sampled
, an d th e sample s wil l b e analyze d fo r th e parameter s liste d i n Tabl e 2-5

.
• Dat a concernin g the drainag e basi n characteristics
, annua l precipitatio n and runoff
, soi l cover , and infiltratio n rate s wil l b e compile d fro m existin g 

### sources
. Contributin g an d noncontributin g watershe d area s wil l b e delineate d o n U.S

. Geologica l Surve y 7 1/ 2 minut e topographica l map s o f th e area
. Precipitatio n dat a wil l b e compile d fro m th e Leadvill e precipitatio n gage record s and the Precipitatio n Frequenc y Atla s o f the Wester n Unite d State s (NOA A 1973)

. Soil distributio n map s (Soil Conservatio n Servic e an d equivalent ) wil l b e reviewe d t o interpre t soi l 

### type s an d characteristics

. Annua l runof f wil l b e estimate d fro m th e probabl e maximu m precipitatio n estimate s give n i n NOA A (198 4 an d 1988)

. Infiltratio n rate s wil l b e estimate d on th e basi s o f precipitatio n 

### data
, soi l cover , an d runof f data

.

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2.3. 3 Penros e Tailin g The investigatio n o f th e Penros e tailin g wil l consis t o f th e collectio n o f surfac e an d subsurfac e tailin g an d foundatio n samples ; installatio n o f monitorin g well s an d collectio n 

### o f groundwate r samples ; collectio n o f surfac e wate r samples ; analytica l testing ; an d geotechnica l laborator y testing

. Specifically

, thes e activitie s wil l consis t of :

• Engineering/Geologi c

sit e reconnaissance

. A sit e reconnaissanc e wil l b e conducte d t o estimat e the siz e and thicknes s o f the tailin g and identif y 9 surfac e features
, genera l sit e conditions
, an d potentia l samplin g locations

.
• Collectio n an d analysi s o f surfac e tailin g samples

. Ten surfac e sample s wil l b e collecte d fro m th e uppe r 2 inche s o f th e tailin g an d composited

. Particl e siz e analysi s wil l b e performe d o n thi s sampl e b y AST M method s D42 1 an d D422

. Th e composit e sampl e wil l b e screened throug h a No

. 8 0 mes h an d th e fin e fractio n analyze d fo r th e parameter s liste d i n Tabl e 2-2

. The initial weigh t o f the sampl e an d the weight o f the material passin g th e No

. 8 0 mes h wil l b e recorded

.
• Collectio n an d analysi s o f two surfac e wate r samples

. Surfac e wate r sample s wil l b e collecte d and flo w measure d a t site s selecte d durin g th e sit e reconnaissanc e i n Stray Hors e Gulc h upstrea m and downstrea m o f the tailing
, i f flo w i s presen t durin g th e investigation

. Thes e sample s wil l b e analyze d fo r the parameters liste d i n Tabl e 2-4

.
• Drillin g o f 8 tes t hole s wit h samplin g fro m th e to p 2 feet
, a t abou t 5-foo t intervals
, an d a t change s i n materia l identifie d durin g drilling

. Tw o test hole s wil l b e drille d i n eac h o f th e tw o tailin g pile s One test hol e wil l b e drille d alon g 4t h Street

, nort h o f th e tw o pile s Thre e tes t hole s wil l b e drille d downgradien t o f th e tailin g pil e

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### Woodward-Clyd e Consultant s

Th e locations o f th e tes t hole s wil l b e establishe d i n th e fiel d base d on th e sit e reconnaissance

. Som e gradin g ma y b e require d t o acces s selecte d locations

. Foundatio n materia l wil l b e drille d t o a dept h o f 2 0 fee t o r 

### unti l bedroc k i s reached
, whicheve r i s less

. Th e maximu m dept h o f drillin g i s estimate d t o b e les s tha n 7 0 feet

. Disturbe d an d relativel y "undisturbed " sample s i n th e test hole s wil l b e collecte d usin g shelb y tubes
, a n Osterber g sampler
, spli t spoon s (SPT)

, o r a Californi a driv e sampler

. Wate r levels
, i f any , wil l b e measure d i n test holes durin g drillin g an d 4 8 hour s afte r drillin g completion

. Selecte d tes t hole s wil l b e complete d

a s monitorin g wells

. In-sit u permeabilit y test s (slu g tests ) wil l b e performe d i n selecte d tes t holes

.
• Al l tailin g an d foundatio n sample s collecte d i n on e selecte d test hol e a t abou t 5-foo t interval s withi n th e tailin g wil l b e analyze d fo r th e parameter s 

### liste d i n Tabl e 2-2

. This tes t hol e wil l b e selecte d i n th e fiel d b y agreemen t betwee n EP A an d ASARCO

. Multipl e sample s wil l b e kep t t o permi t testin g o f engineerin g and chemica l propertie s a t th e sampl e dept h a s needed

. Additiona l sample s fo r chemica l analyses wil l b e selecte d fro m thos e sample s collecte d a t 5-foo t interval s i n th e remainin g boring s withi n th e tailing
, a s follows : Withi n 1 0 fee t abov e th e foundatio n materia l Withi n th e foundatio n materia l approximatel y 5 fee t belo w th e tailin g Onl y one sampl e fro m belo w the groundwate r tabl e i n the tes t hol e alon g 4t h Stree t wil l b e analyzed

. EP A Metho d 131 2 leachin g procedur e wil l b e 

### use d t o evaluat e th e leachin g o f metal s fro m th e tailin g samples

.
• Sample s fro m th e tes t hole s wil l b e teste d fo r geotechnica l properties

. Th e testin g ma y includ e th e following : Moistur e content : AST M D221 6 We t an d dr y densities : AST M D221 6

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Particl e siz e distribution : AST M D42 1 an d D42 2 Atterber g limit s (liqui d limi t an d plasticit y index) : AST M D431 8 Specifi c gravity : AST M D85 4 

### Triaxia l shea r strength : USC E E M 1110-2-190 6 Th e specifi c geotechnica l testin g progra m wil l b e establishe d base d on th e 

### type s o f material s encountered
, sample s recovered
, an d engineerin g judgment

. Othe r propertie s fo r desig n wil l be estimate d fro m inde x propertie s o r collecte d durin g remedia l design
, i f needed

.
• A composit e o f th e sample s fro m th e to p 2 fee t o f tailin g i n th e tes t hole s wil l b e analyze d fo r the soi l nutrient s liste d i n Tabl e 2-2

.
• Installatio n an d samplin g o f u p t o 8 monitorin g wells

. On e o f th e test hole s withi n th e pile s wil l b e complete d a s a monitorin g wel l screene d

nea r th e bas e o f th e tailing

. Th e three remainin g test hole s withi n th e 

### tailin g wil l b e complete d a s monitorin g well s screene d a t variou s depth s abov e th e foundation
, i f groundwate r i s encountered

. Th e tes t hol e alon g 4t h Stree t an d th e thre e downgradien t tes t hole s wil l b e complete d a s monitorin g well s screened withi n th e alluvium

. Thes e monitorin g well s wil l b e installe d wit h a 10-foo t screened interval
, wit h 5 fee t o f scree n remainin g abov e th e wate r table

. Th e monitorin g well s wil l b e develope d

and sample d and the sample s wil l b e analyze d fo r the parameter s liste d i n Tabl e 2-5

.
• Dat a concernin g th e drainag e basi n characteristics
, annua l precipitatio n an d runoff
, soi l cover , an d infiltratio n rate s wil l b e compile d fro m existin g sources
. Contributin g an d noncontributin g watershe d area s wil l b e delineate d o n U.S

. Geologica l Surve y 7 1/ 2 minut e topographica l map s o f th e area
. Precipitatio n dat a wil l b e compile d fro m th e Leadvill e precipitatio n gag e record s an d th e Precipitatio n Frequenc y Atla s o f th e Wester n Unite d State s (NOA A 1973)

. Soil distributio n map s (Soi l Conservatio n Servic e an d equivalent ) wil l b e reviewe d t o interpre t soi l

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### Woodward-Clyd e Consultant s
type s an d characteristics

. Annua l runof f wil l b e estimate d fro m th e probabl e maximu m precipitatio n estimate s give n i n NOA A (198 4 and 1988)

. Infiltratio n rate s wil l b e estimate d on th e basi s o f precipitatio n 

### data
, soi l cover , an d runof f data

. 2.3. 4 Hamm' s Mil l Tailin g T h e investigatio n o f fo r th e Hamm' s Mil l tailin g wil l consis t o f th e collectio n o f surfac e an d subsurfac e tailin g an d foundatio n samples ; installatio n o f monitorin g well s an d collectio n o f groundwate r samples ; collectio n o f surfac e wate r samples ; analytica l testing ; an d geotechnica l laborator y testing

. Specifically

, thes e activities wil l consist of :


### • Engineering/Geologi c

reconnaissance

.

A sit e reconnaissanc e wil l b e conducte d t o estimat e th e siz e an d thicknes s o f th e tailin g an d identif y surfac e features
, genera l sit e conditions
, an d potentia l samplin g locations

.
• Collectio n an d analysi s o f surfac e tailin g samples

. Ten surfac e sample s wil l b e collecte d fro m th e uppe r 2 inche s o f th e tailin g an d composited

. Particl e siz e analysi s wil l b e performe d b y AST M method s D42 1 an d D422

. Th e composit e sampl e wil l b e screened throug h a No

. 8 0 mes h an d th e fin e fractio n analyze d fo r th e parameters liste d i n Tabl e 2-2

. Th e initia l weigh t o f the sampl e and the weigh t o f the materia l passin g the 

### No

. 8 0 mes h wil l b e recorded

.
• Collectio n and analysi s o f tw o surfac e water samples

. Sample s wil l b e collecte d an d flo w measure d fro m th e water flowin g i n Stra y Hors e Gulch upgradien t an d downgradien t o f th e tailin g a t site s selecte d durin g th e fiel d reconnaissance , i f flo w i s present durin g th e fiel d investigation

. Thes e sample s wil l b e analyze d fo r th e parameters liste d i n Tabl e 2-4

.
• Drillin g o f 8 tes t hole s wit h samplin g fro m th e to p 2 feet
, a t abou t 5-foo t intervals
, an d a t change s i n materia l identifie d durin g drilling

. Fou r tes t hole s wil l b e drille d withi n th e tailin g pil e
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### Woodward-Clyd e Consultant s
Thre e tes t hole s wil l b e drille d downgradien t o f th e tailin g pil e On e tes t hol e wil l b e upgradien t o f th e tailin g Th e location s o f th e tes t hole s wil l b e establishe d i n th e fiel d base d o n th e sit e reconnaissance

. Som e gradin g ma y b e require d t o acces s th e drillin g locations

. Foundatio n materia l wil l b e drille d t o a dept h o f 2 0 fee t o r unti l bedroc k i s reached
, whicheve r i s less

. Th e maximu m dept h o f drillin g i s estimate d t o b e les s tha n 7 0 feet

. Disturbe d an d relativel y 

### "undisturbed " sample s i n the tes t hole s wil l b e collecte d usin g shelb y tubes
, a n Osterber g sampler
, spli t spoon s (SPT)

, o r a Californi a driv e sampler

. Wate r levels
, i f any , wil l b e measure d i n tes t hole s durin g drillin g an d 4 8 hour s afte r drillin g completion

. Selecte d tes t hole s wil l b e complete d

a s monitorin g wells

. In-sit u permeabilit y test s (slu g tests ) wil l b e performe d i n selecte d tes t holes

. Al l tailin g an d foundatio n sample s fro m on e selecte d tes t hol e a t abou t 5-foo t interval s withi n th e tailin g pil e wil l be analyze d fo r th e parameter s liste d i n Tabl e 2-2

. Thi s tes t hol e wil l b e selecte d i n th e fiel d b y agreemen t betwee n EP A an d ASARCO

. Multipl e sample s wil l b e kep t t o permi t testin g o f engineerin g and chemica l propertie s a t th e sampl e dept h a s needed

. Additiona l sample s fo r chemica l analyse s wil l b e 

### selecte d fro m thos e sample s collecte d a t 5-foo t interval s i n th e remainin g boring s withi n the tailin g a s follows : A t a dept h o f abou t 5 fee t Withi n 5 fee t abov e th e foundatio n materia l Withi n th e foundatio n materia l approximatel y 5 fee t belo w 

### th e tailin g Onl y on e sampl e fro m belo w groundwate r i n the downgradien t tes t hole s 

### wil l b e analyzed

. EP A Metho d 131 2 leachin g procedur e wil l b e use d t o evaluat e th e leachin g o f metal s fro m th e tailin g samples

.

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### Woodward-Clyd e Consultant s

• Sample s fro m th e tes t hole s wil l be teste d fo r geotechnica l properties

. Th e testin g ma y includ e th e following : Moistur e content : AST M D221 6 We t an d dr y densities : AST M D221 6 Particl e siz e distribution : AST M D42 1 an d D42 2 Atterber g limit s (liqui d limi t an d plasticit y index) : AST M D431 8 Specifi c gravity : AST M D85 4 Triaxia l shea r strength : USC E E M 1110-2-190 6 Th e specifi c geotechnica l testin g progra m wil l b e establishe d base d o n th e type s o f material s encountered
, sample s recovered
, an d engineerin g judgment

.
• A composit e o f th e sample s fro m th e uppe r 2 fee t o f tailin g i n th e tes t hole s wil l b e analyze d fo r the nutrient s liste d i n Tabl e 2-2

.
• Installatio n an d samplin g o f u p t o 8 monitorin g wells

. On e o f th e tes t hole s withi n th e tailin g wil l b e complete d a s a monitorin g wel l screene d 

### withi n th e tailin g abov e th e foundatio n material

. Th e remainin g thre e tes t hole s withi n th e tailin g wil l b e complete d a s monitorin g well s screene d a t variou s depths
, i f groundwate r i s encountered

. Th e tes t hole s downgradien t an d upgradien t o f th e tailin g pil e wil l b e complete d a s monitorin g well s screene d withi n th e alluvium

. Thes e well s wil l b e installe d wit h a 10-foo t screene d interva l wit h 5 fee t o f scree n remainin g abov e the wate r table

. The monitorin g well s wil l b e develope d and 

### sampled
, an d th e sample s wil l b e analyze d for th e parameter s liste d i n Tabl e 2-5

.
• Dat a concernin g th e drainag e basi n characteristics
, annua l precipitatio n 

### an d runoff
, soi l cover , an d infiltratio n rate s wil l b e compile d fro m existin g sources
. Contributin g an d noncontributin g watershed area s wil l b e delineate d o n U.S

. Geologica l Surve y 7 1/ 2 minut e topographica l map s o f

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### Woodward-Clyd e Consultant s

th e area
. Precipitatio n dat a wil l b e compile d fro m th e Leadvill e precipitatio n gag e record s and the Precipitatio n Frequenc y Atla s o f the Wester n Unite d State s (NOA A 1973)

. Soi l distributio n map s (Soi l Conservatio n Servic e an d equivalent ) wil l b e reviewe d t o interpre t soi l type s an d characteristics

. Annua l runof f wil l b e estimate d fro m th e 

### probabl e maximu m precipitatio n estimate s give n i n NOA A (198 4 and 1988)

. Infiltratio n rate s wil l b e estimate d on th e basi s o f precipitatio n 

### data
, soi l cover , an d runof f data

. 2.3. 5 Hecl a Tailin g Th e investigatio n o f th e Hecl a tailin g wil l consis t o f th e collectio n o f surfac e an d subsurfac e tailin g an d foundatio n samples ; installatio n o f monitorin g well s an d collectio n o f groundwate r samples ; collectio n o f surfac e wate r samples ; analytica l testing ; 

### an d geotechnica l laborator y testing

. Specifically

, thes e activitie s wil l consist of :

• Engineering/Geologi c

sit e reconnaissance

. A sit e reconnaissanc e wil l b e conducte d t o estimat e th e siz e an d thicknes s o f th e tailin g an d identif y surfac e features
, genera l sit e conditions
, an d potentia l samplin g locations

.
• Collectio n an d analysi s o f surfac e tailin g samples

. Surfac e sample s wil l b e collecte d fro m th e uppe r 2 inche s o f th e tailing

. Fiv e sample s wil l b e collecte d fo r eac h o f th e seve n tailin g disposa l area s an d composite d int o on e sampl e pe r area
. Particl e siz e analysi s wil l b e performe d o n thes e sample s b y AST M method s D42 1 and D422

. The composit e sample s wil l b e screene d throug h a No

. 8 0 mes h an d th e fin e fractio n analyze d fo r th e parameters liste d i n Tabl e 2-2

. The initial weigh t o f the sampl e and the weigh t o f th e materia l passin g th e No

. 8 0 mes h wil l b e recorded

.
• Collectio n an d analysi s o f surfac e wate r samples

. On e surfac e wate r sampl e wil l b e collecte d fro m eac h o f th e impoundment s whic h ha s wate r ponde d on th e tailing

. Th e quantit y o f ponde d wate r wil l b e estimated

. Thes e sample s wil l b e analyze d for th e parameter s liste d i n Tabl e 2-3

. Surfac e wate r sample s wil l als o b e collecte d alon g Malt a Gulch upgradien t
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### Woodward-Clyd e Consultant s

an d downgradien t o f the Hecl a tailin g at site s selecte d durin g the sit e reconnaissance , and surfac e wate r flo w wil l b e measured
, i f flo w i s presen t durin g th e fiel d investigation

. Th e surfac e wate r sample s wil l b e analyze d for th e parameters liste d i n Tabl e 2-4

. Du e t o th e ephemera l natur e o f Malt a Gulch flow
, i t i s likel y tha t n o stream flo w wil l b e presen t a t th e tim e o f th e propose d samplin g event ; therefore
, wate r qualit y fo r sit e MG- 1 fro m th e Surfac e Wate r Progra m (Res-ASARC O 1991c ) wil l b e use d i f i t i s no t possibl e t o collec t ne w dat a under thi s program

. Drillin g o f 1 9 tes t hole s wit h samplin g fro m th e to p 2 fee t o f tailing
, a t abou t 5-foo t intervals
, an d a t change s i n materia l identifie d durin g drilling

. On e tes t hol e wil l b e drille d i n th e westernmost impoundment (Are a No

. 1 i n Figur e 3)

. Tw o tes t holes wil l b e drille d alon g the embankmen t o f Are a No

. 2

. Fiv e tes t hole s wil l b e drille d withi n Are a No

. 3 : two alon g th e embankment
, tw o withi n th e impoundment
, an d on e a t 

### th e toe o f th e embankment

. On e tes t hol e wil l b e drille d i n Are a No

. 4

. Thre e test hole s wil l b e drille d withi n Are a No

. 5 (on e withi n th e impoundment
, on e alon g th e perimeter , an d on e o n th e embankmen t betwee n Area s 3 an d 5)

. Tw o test hole s wil l b e drille d withi n Area No

. 6 (on e withi n th e impoundment an d on e o n th e embankmen t commo n t o Area s 5 an d 6)

. On e tes t hol e wil l b e drille d i n Are a No

. 7

.

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### Woodward-Clyd e Consultant s
On e tes t hol e wil l b e drille d upgradien t fro m Are a No

. 1

. Thre e tes t hole s wil l b e drille d downgradient o f Area No

. 1

. The location s o f the tes t holes wil l b e establishe d i n the fiel d base d o n the sit e reconnaissance

. Som e gradin g ma y b e require d t o acces s selecte d locations

. Foundatio n materia l wil l b e drille d t o a dept h o f 2 0 fee t or unti l bedroc k i s encountered
, whichever i s less

. Th e maximu m dept h o f drillin g i s estimate d t o b e les s tha n 6 0 feet

. Disturbe d an d relativel y "undisturbed " sample s i n th e test holes wil l b e collecte d usin g shelb y tubes
, an Osterber g sampler
, split spoon s (SPT)

, o r a Californi a driv e sampler

. Wate r level s wil l b e measured i n tes t hole s durin g drillin g an d 4 8 hour s 

### afte r drillin g completion

. Selecte d tes t hole s wil l b e complete d a s monitorin g wells

. In-sit u permeabilit y test s (slu g tests ) wil l performe d i n 

### selecte d tes t holes

. Al l tailin g an d foundatio n sample s collecte d fro m a selecte d tes t hol e at abou t 5-foo t interval s wher e th e tailin g i s nea r it s maximu m thicknes s wil l b e analyze d for th e chemica l parameter s liste d i n Tabl e 2-2

. Thi s tes t hol e wil l b e selecte d i n th e fiel d b y agreemen t betwee n EP A an d ASARCO

. Multipl e sample s wil l be kep t t o permi t testin g o f engineerin g and chemica l propertie s a t the sampl e dept h a s needed

. Additiona l sample s fo r chemica l analyse s wil l be selecte d fro m thos e sample s collecte d a t 5-foo t interval s i n th e remainin g boring s withi n th e tailing
, a s follows : A t a dept h o f abou t 5 fee t 

### Withi n 5 fee t abov e th e foundatio n materia l i n Area s 3 an d 5 Within th e foundatio n materia l approximatel y 5 fee t belo w th e tailin g i n Area s 2 , 3 an d 5

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### Woodward-Clyd e Consultant s
Onl y on e sampl e fro m belo w groundwate r i n th e downgradien t tes t hole s wil l b e analyzed

. EP A Metho d 131 2 leachin g procedur e wil l b e use d t o 

### evaluat e th e leachin g o f metal s fro m th e tailin g samples

.
• Sample s fro m th e test holes wil l b e teste d fo r geotechnica l properties

. T h e testin g ma y includ e th e following : 

### Moistur e content : AST M D221 6 We t an d dr y densities : AST M D221 6 Particl e siz e distribution : AST M D42 1 an d D42 2 Atterber g limit s (liqui d limi t an d plasticit y index) : AST M D431 8 Specifi c gravity : AST M D85 4 

### Consolidation : AST M D243 5 Permeability : AST M D508 4 Unconfine d compressio n strength : AST M D216 6 Triaxia l shea r strength : USC E E M 1110-2-190 6 Th e specifi c geotechnical testin g progra m wil l b e establishe d base d on th e 

### type s o f material s encountered
, sample s recovered
, an d engineerin g judgment

. 

### • A composit e o f th e sample s fro m th e to p 2 fee t o f tailin g i n th e tes t hole s wil l b e analyze d fo r th e nutrient s liste d i n Tabl e 2-2

.
• Installatio n an d samplin g o f 8 monitorin g wells

. Fou r tes t hole s withi n th e tailin g are a wil l b e complete d a s monitorin g well s screene d withi n th e tailin g abov e th e foundatio n material

. Th e tes t hole s downstrea m o f Are a 1 an d th e upgradien t tes t hol e wil l b e complete d a s monitorin g well s installe d wit h a 10-foo t screened interva l withi n th e alluvium

. Fiv e fee t o f
scree n wil l remai n abov e th e water table

. Th e monitorin g well s wil l b e develope d an d sample d an d th e sample s wil l b e analyze d fo r th e parameter s liste d i n Tabl e 2-5 ,

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### Woodward-Clyd e Consultant s

• Dat a concernin g th e drainag e basi n characteristics
, annua l precipitatio n and runoff
, soi l cover , and infiltratio n rate s wil l b e compile d fro m existin g sources
. Contributin g an d noncontributin g watershe d area s wil l b e delineate d o n U.S

. Geologica l Surve y 7 1/ 2 minut e topographica l map s o f th e area
. Precipitatio n dat a wil l b e compile d fro m th e Leadvill e precipitatio n gag e record s an d th e Precipitatio n Frequenc y Atla s o f th e Wester n Unite d State s (NOA A 1973)

. Soi l distributio n map s (Soil Conservatio n Servic e an d equivalent ) wil l b e reviewe d t o interpre t soi l type s and characteristics

. Annua l runof f wil l b e estimate d fro m th e probabl e maximu m precipitatio n estimate s give n i n NOA A (198 4 an d 1988)

. Infiltratio n rate s wil l b e estimate d o n th e basi s o f precipitatio n 

### data
, soi l cover , an d runof f data

. 2.3. 6 Malt a Tailin g Th e investigatio n o f th e Malt a tailin g wil l consis t o f th e collectio n o f surfac e an d subsurfac e tailin g an d foundatio n samples ; installatio n o f monitorin g well s an d collectio n o f groundwate r samples ; collectio n o f surfac e water samples ; analytica l testing ; an d geotechnica l laborator y testing

. Specifically

, thes e activitie s wil l consis t of :

• Engineering/Geologi c

sit e reconnaissance

. A sit e reconnaissanc e wil l b e conducte d t o estimat e the siz e and thicknes s o f the tailin g and identif y surfac e features
, genera l sit e conditions
, an d potentia l samplin g locations

.


### • Collectio n an d analysi s o f surfac e tailin g samples

. Fiv e surfac e sample s wil l b e collecte d fro m th e uppe r 2 inche s o f th e tailin g an d composited

. Particl e siz e analysi s wil l b e performe d b y AST M method s D421 an d 

### D422

. Th e composit e sampl e wil l b e screene d throug h a No

. 8 0 mes h an d th e fin e fractio n analyzed fo r th e parameter s liste d i n Tabl e 2-2

. Th e initia l weigh t o f th e sampl e an d th e weigh t o f th e materia l passin g th e 

### No

. 8 0 mes h wil l b e recorded

.
• Collectio n an d analysi s o f surfac e wate r samples

. On e surfac e wate r sampl e wil l b e collecte d fro m wate r ponde d o n the tailing
, i f present , an d

22443-22327/R14. 2

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### Woodward-Clyd e Consultant s analyze d fo r th e parameter s liste d i n Tabl e 2-3

. Th e quantit y o f ponde d water wil l b e estimated

. Sample s wil l b e collecte d and flo w measure d fro m th e wate r flowin g i n Malt a Gulc h upgradien t an d downgradien t o f th e tailin g a t sites selecte d durin g th e fiel d reconnaissance , i f flo w i s 

### presen t durin g th e fiel d investigation

. Thes e sample s wil l be analyze d fo r th e parameter s liste d i n Tabl e 2-4

. A s note d previously
, i t i s likel y tha t n o strea m flo w wil l b e presen t at the tun e o f the samplin g even t propose d fo r 

### thi s program ; therefor e wate r qualit y an d flo w dat a collecte d a t sit e MG- 1 unde r the curren t Surfac e Wate r Program (Res-ASARCO 1991c ) wil l b e use d i f i t i s no t possibl e t o collec t ne w dat a unde r thi s program

.
• Drillin g o f 8 tes t hole s wit h samplin g fro m th e to p 2 feet
, a t abou t 5-foo t intervals
, an d a t change s i n materia l identifie d durin g drilling

. Fou r tes t hole s wil l b e drille d withi n th e tailin g pil e Thre e tes t hole s wil l b e drille d downgradien t o f th e pil e One tes t hol e wil l b e drille d upgradien t o f the tailing

. 

### The location s o f th e tes t hole s wil l b e establishe d i n th e fiel d based o n th e sit e reconnaissance

. Som e gradin g ma y b e require d t o acces s th e tes t hol e locations

. Foundatio n materia l wil l b e drille d t o a dept h o f 1 0 fee t o r unti l bedroc k i s reached
, whicheve r i s les s i n th e tes t holes drille d i n th e tailing

. Th e downgradien t tes t hol e wil l b e drille d t o 5 fee t belo w groundwate r o r bedrock
, whichever i s less

. The maximu m dept h o f drillin g i s estimate d t o b e les s tha n 3 0 feet

. Disturbe d an d relativel y "undisturbed " sample s i n th e test hole s wil l b e collecte d usin g shelb y tubes
, an Osterber g sampler
, split spoon s (SPT)

, or a Californi a driv e sampler

. Wate r levels
, i f any , wil l b e measure d i n tes t hole s durin g drillin g an d 4 8 hour s afte r drillin g completion

. Selecte d tes t hole s wil l b e complete d a s monitorin g wells

. In-sit u permeabilit y test s (slu g tests ) wil l b e performe d 

### i n selecte d tes t holes

.

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• Th e tailin g an d foundatio n sample s collecte d i n on e tes t hol e a t abou t 5-foo t interval s withi n th e tailin g pil e an d on e sampl e fro m below groundwate r i n th e downgradien t tes t hol e wil l b e analyze d fo r th e parameters liste d i n Tabl e 2-2

. Th e test hol e wil l b e selecte d i n th e fiel d b y agreemen t betwee n EP A an d ASARCO

. Multipl e sample s wil l b e kep t t o permi t testin g o f engineerin g an d chemica l propertie s a t th e sampl e dept h a s needed

. EP A Metho d 131 2 leachin g procedur e wil l b e use d t o evaluat e th e leachin g o f metal s fro m th e tailin g samples

.
• Sample s fro m th e tes t holes wil l be teste d fo r geotechnica l properties

. T h e testin g ma y includ e th e following : Moistur e content: AST M D221 6 We t an d dr y densities : AST M D221 6 Particl e siz e distribution : AST M D42 1 an d D42 2 Atterber g limit s (liquid limi t an d plasticit y index) : AST M D431 8 Th e specifi c geotechnica l testin g progra m wil l b e establishe d based o n th e type s o f material s encountered
, sample s recovered
, an d engineerin g judgment

. Othe r propertie s fo r desig n wil l b e estimate d fro m inde x propertie s o r collecte d durin g remedia l design
, i f needed

.
• Th e sampl e fro m th e uppe r tw o fee t o f tailin g i n th e tes t hol e wil l b e analyze d fo r the nutrient s liste d i n Tabl e 2-2

.
• Installatio n an d samplin g o f u p t o 8 monitorin g wells

. On e tes t hol e withi n th e tailin g wil l b e complete d a s a monitorin g wel l screened withi n th e tailin g abov e th e foundatio n material

. Th e thre e remainin g tes t hole s withi n th e tailin g wil l b e complete d a s monitorin g well s screened a t 

### variou s depths
, i f groundwate r i s encountered

. The downgradient test holes an d upgradien t tes t hol e wil l b e complete d a s monitorin g well s screene d withi n the foundatio n materia l abov e bedrock

. Thes e monitorin g well s wil l b e installe d wit h a 10-foo t screene d interva l wit h 5 fee t o f scree n
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remainin g abov e th e wate r table

. Th e monitorin g well s wil l b e develope d

and sampled
, and the sample s wil l b e analyze d fo r the parameter s liste d i n Tabl e 2-5

.


### • Dat a concernin g th e drainag e basi n characteristics
, annua l precipitatio n an d runoff
, soi l cover , an d infiltratio n rate s wil l b e compile d fro m existin g sources
. Contributin g an d noncontributin g watershe d area s wil l b e delineate d on U.S

. Geologica l Surve y 7 1/ 2 minut e topographica l map s o f the area
. Precipitatio n dat a wil l b e compile d fro m the Leadvill e 

### precipitatio n gag e record s an d th e Precipitatio n Frequenc y Atla s o f th e Wester n Unite d State s (NOA A 1973)

. Soi l distributio n map s (Soi l Conservatio n Servic e an d equivalent ) wil l b e reviewe d t o interpre t soi l type s an d characteristics

. Annua l runof f wil l b e estimate d fro m th e probabl e maximu m precipitatio n estimate s give n i n NOA A (198 4 an d 1988)

. Infiltratio n rate s wil l b e estimate d o n th e basi s o f precipitatio n data
, soi l cover , an d runof f data

. 2.3. 7 Colorad o Zin c Lea d Tailin g Th e investigatio n o f th e Colorad o Zinc Lea d Tailin g wil l consist o f th e collectio n o f surfac e an d subsurfac e tailin g an d foundatio n samples ; installatio n o f monitorin g well s
an d collectio n o f groundwate r samples ; collectio n o f surfac e wate r samples ; analytica l testing ; an d geotechnica l laborator y testing

. Specifically

, thes e activitie s wil l consis t of :
• Engineering/Geologi c

sit e reconnaissance

. A sit e reconnaissanc e wil l b e conducte d t o estimat e th e siz e and thickness o f th e tailin g and identif y surfac e features
, genera l sit e conditions
, an d potentia l samplin g locations

.
• Collectio n an d analysi s o f surfac e tailin g samples

. Fiv e surfac e sample s wil l b e collecte d fro m th e uppe r 2 inche s o f th e tailin g an d composited

. Particl e siz e analysi s wil l b e performe d b y AST M method s D42 1 an d D422

. Th e composit e sampl e wil l b e screened throug h a No

. 8 0 mes h an d th e fin e fractio n analyze d fo r th e parameters liste d i n Tabl e 2-2

. Th e

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initia l weigh t o f th e sampl e an d th e weigh t o f th e materia l passin g th e No

. 8 0 mes h wil l b e recorded

.


### • Collectio n an d analysi s o f surfac e wate r samples

. On e surfac e wate r sampl e wil l b e collecte d fro m wate r ponde d on th e tailing
, i f present , an d analyze d fo r th e parameter s liste d i n Tabl e 2-3

. Th e quantit y o f ponde d wate r wil l b e estimated

. Sample s wil l b e collecte d and flo w measure d o f the water flowin g i n Californi a Gulch upgradien t an d downgradien t o f the tailin g a t sites selecte d durin g th e fiel d reconnaissance , i f flo w i s presen t durin g th e fiel d investigation

. Thes e sample s wil l be analyze d fo r th e parameter s liste d i n Tabl e 2-4

. Wate r qualit y an d flo w dat a collecte d a t sit e CG- 4 unde r the curren t Surfac e Wate r Progra m (Res-ASARCO 1991c ) wil l b e use d t o supplemen t dat a collecte d unde r thi s program

.
• Drillin g o f 8 tes t hole s wit h samplin g fro m th e to p 2 feet
, at abou t 5-foo t intervals
, an d a t Changes i n materia l identifie d durin g drilling

. Fou r tes t hole s wil l b e drille d withi n th e tailin g pil e Thre e tes t hole s wil l b e drille d downgradien t o f th e pil e On e tes t hol e wil l b e drille d upgradien t o f th e tailin g impoundmen t 

### Th e locatio n o f th e test hole s wil l b e establishe d i n th e fiel d base d o n th e 

### sit e reconnaissance

. Som e gradin g ma y b e require d t o acces s th e tes t hol e locations

. Foundatio n materia l wil l b e drille d t o a dept h o f 1 0 fee t o r unti l bedroc k i s reached
, whicheve r i s les s i n th e tes t hol e drille d i n th e tailing

. Th e downgradien t an d upgradien t tes t hole s wil l b e drille d t o 5 fee t belo w groundwate r or bedrock
, whichever i s less

. Th e maximu m 

### dept h o f drillin g i s estimate d t o b e less tha n 3 0 feet

. Disturbe d an d relativel y "undisturbed " sample s i n the tes t hole s wil l b e collecte d usin g shelb y tubes
, a n Osterber g sampler
, split spoon s (SPT)

, o r a Californi a 

### driv e sampler

. Wate r levels
, i f any , wil l b e measure d i n tes t hole s durin g drillin g an d 4 8 hour s afte r drillin g completion

. Selecte d tes t hole s wil l b e
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complete d as monitorin g wells

. In-sit u permeabilit y test s (slu g tests ) wil l b e performe d i n selecte d tes t holes

.


### • Th e tailin g an d foundatio n sample s collecte d i n on e tes t hol e a t abou t 5-foo t interval s withi n th e tailin g pil e an d on e sampl e fro m belo w groundwate r i n th e downgradien t test hol e wil l b e analyze d fo r th e parameter s liste d i n Tabl e 2-2

. Th e test hol e wil l b e selecte d i n th e fiel d b y agreemen t betwee n EP A an d ASARCO

. Multipl e sample s wil l b e kep t t o permi t testin g o f engineerin g an d chemica l propertie s a t th e sampl e dept h a s needed

. EP A Metho d 131 2 leachin g procedur e wil l b e use d t o 

### evaluat e th e leachin g o f metal s fro m th e tailin g samples

.
• Sample s fro m th e tes t hole s wil l b e teste d fo r geotechnica l properties

. Th e testin g ma y includ e th e following : Moistur e content: AST M D221 6 We t an d dr y densities : AST M D221 6 Particl e siz e distribution : AST M D42 1 an d D42 2 Atterber g limit s (liqui d limi t an d plasticit y index) : AST M D431 8 Th e specifi c geotechnica l testin g progra m wil l b e establishe d based o n th e type s o f material s encountered
, sample s recovered
, an d engineerin g judgment

. Othe r propertie s fo r desig n wil l b e estimate d fro m inde x propertie s or collecte d durin g remedia l design
, i f needed

.
• Th e sampl e fro m th e uppe r tw o fee t o f tailin g i n th e test hol e wil l b e analyze d fo r th e nutrient s liste d i n Tabl e 2-2

.
• Installatio n an d samplin g o f u p t o 8 monitorin g wells

. On e tes t hol e withi n th e tailin g wil l b e complete d a s a monitorin g wel l screened withi n th e tailin g abov e th e foundatio n material

. Th e remainin g thre e tes t hole s 

### withi n th e tailin g wil l b e complete d a s monitorin g well s screened a t variou s depths
, i f groundwate r i s encountered

. Th e downgradien t tes t
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hole s an d upgradien t tes t hol e wil l b e complete d a s monitorin g well s screene d withi n the foundatio n materia l abov e bedrock

. Thes e monitorin g well s wil l b e installe d wit h a 10-foot screene d interval
, wit h 5 fee t o f
scree n remainin g abov e th e wate r table

. Th e monitorin g well s wil l b e develope d an d sampled
, an d th e sample s wil l b e analyzed fo r th e parameter s liste d i n Tabl e 2-5

.


### • Dat a concernin g the drainag e basi n characteristics
, annua l precipitatio n an d runoff
, soi l cover , an d infiltratio n rate s wil l b e compile d fro m existin g sources
. Contributin g an d noncontributin g watershe d area s wil l b e delineate d o n U.S

. Geologica l Surve y 7 1/ 2 minut e topographica l map s o f th e area
. Precipitatio n dat a wil l b e compile d fro m th e Leadvill e precipitatio n gage record s an d th e Precipitatio n Frequenc y Atla s o f th e Wester n Unite d State s (NOA A 1973)

. Soi l distributio n map s (Soi l Conservatio n Servic e an d equivalent ) wil l b e reviewe d t o interpre t soi l type s an d characteristics

. Annua l runof f wil l b e estimate d fro m the probabl e maximu m precipitatio n estimate s give n i n NOA A (198 4 an d 1988)

. Infiltratio n rate s wil l b e estimate d o n the basi s o f precipitatio n data
, soi l cover , and runof f data

. 2.3. 8 Fluvia l Tailin g Deposit s Th e investigatio n o f nin e potentia l fluvia l tailin g deposit s wil l b e similar t o tha t fo r th e seve n tailin g disposa l sites

. Th e samplin g wil l consis t o f th e collectio n o f surfac e wate r samples
, surfac e an d subsurfac e tailin g samples
, an d foundatio n samples

. Th e analyse s wil l consis t o f analytica l testin g an d geotechnical laborator y testing

. Specifically

, thes e activitie s wil l consis t of :

• Engineering/geologi c

sit e reconnaissance

. A sit e reconnaissanc e wil l b e conducte d t o evaluat e th e sit e a s tailing
, hydrauli c minin g deposits
, o r natura l floodplai n materials

. Site s identifie d t o b e tailin g deposit s wil l b e reviewe d furthe r t o identif y surfac e features
, genera l sit e conditions
, an d potentia l samplin g an d borin g method s an d locations

. A backho e ma y b e use d t o expos e a shallo w portio n o f th e deposi t t o assis t i n identifyin g th e
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material

. I f th e material s a t a sit e ar e no t considere d t o b e tailing
, th e scop e o f th e investigatio n wil l b e reduce d an d wil l b e intende d t o provid e dat a t o suppor t th e observation s mad e durin g th e fiel d reconnaissance

.
• Collectio n an d analysi s o f surfac e tailin g samples

. Te n surfac e sample s wil l b e collecte d fro m th e uppe r 2 inche s o f th e large r deposit s (i.e.

, greate r tha n 5 acres ) an d composite d int o on e sampl e fo r testing

. Fiv e surfac e sample s wil l b e collecte d an d composite d fro m th e deposit s smalle r tha n 5 acre s (i.e.

, fluvia l Site s #3 , #5 , an d #6)

. Particl e siz e analyses wil l b e performe d b y AST M method s D42 1 and D422

. The composit e sample s wil l b e screene d throug h a No

. 8 0 mes h an d th e fin e fractio n analyze d fo r th e parameters liste d i n Tabl e 2-2

. Th e initia l weigh t
o f th e sampl e and th e weight o f th e materia l passin g th e No

. 8 0 mes h wil l b e recorded

.
• Collectio n and analysi s o f surfac e wate r samples

. Sample s wil l b e collecte d o f surfac e wate r upgradien t an d downgradien t o f th e fluvia l deposit s an d flo w throug h th e tailin g deposi t wil l b e measured

. Surfac e water samplin g locations i n Californi a Gulch

, Malt a Gulch

, an d th e Arkansa s Rive r wil l b e selecte d durin g th e fiel d reconnaissance

. Th e sample s wil l b e analyze d for th e parameter s liste d i n Tabl e 2-4

. Surfac e wate r samplin g station s fo r the curren t surfac e wate r progra m (Res

- 

### ASARC O 1991c ) wil l b e use d wher e possible

.


### • A minimu m o f tw o test hole s pe r deposi t wil l b e drille d wit h samplin g fro m th e to p 2 feet
, a t abou t 5 foo t intervals
, an d a t change s i n materia l identifie d durin g drilling

. On e additiona l tes t hol e wil l b e drille d fo r eac h 1 0 acre s o f tailin g i n exces s o f 5 acres
. Th e hole s wil l b e drille d int o th e foundatio n t o a minimu m dept h o f one hal f the dept h o f the fluvia l deposi t o r t o bedrock
, whicheve r i s less

. Disturbe d an d relativel y "undisturbed " sample s i n th e tes t hole s wil l b e collecte d usin g 2-inc h diamete r spli t spoon s (SPT)

, Californi a samples
, a n Osterber g sampler
, o r Shelb y tubes

. Wate r levels
, i f any , wil l b e measure d i n test hole s durin g

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drillin g an d afte r drillin g completion

. Tes t hol e location s wil l be selecte d durin g th e fiel d reconnaissance

.
• Tailin g an d foundatio n sample s collecte d i n th e tes t hole s wil l b e analyze d 

### fo r chemica l parameters a s follows : On e tailin g sampl e wil l b e analyze d for eac h 1 0 fee t dept h o f tailin g for th e tota l an d Metho d 131 2 analyte s liste d i n Tabl e 2-2

. 

### On e foundatio n sampl e wil l b e analyze d fo r th e tota l analyte s liste d i n Tabl e 2-2

. 

### Additiona l sample s wil l b e analyze d fo r tota l an d Metho d 131 2 analyte s i f significan t change s i n materia l ar e noted durin g drilling

.
• Multipl e sample s wil l b e kep t t o permi t testin g o f engineerin g an d chemica l propertie s at the sampl e dept h a s needed

.
• Sample s fro m th e tes t hole s ma y b e teste d fo r geotechnica l properties

. T h e testin g ma y includ e th e following : Moistur e content : AST M D221 6 We t an d dr y densities : AST M D221 6 Particl e siz e distribution : AST M D42 1 an d D42 2 Atterber g limit s (liquid limi t an d plasticit y index) : AST M D431 8 Permeability : AST M D508 4 Unconfine d compressio n strength : AST M D216 6 

### Th e specifi c geotechnica l testin g progra m wil l b e establishe d base d o n th e type s o f material s encountered
, sample s recovered
, an d engineerin g 

### judgement

.

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• Sample s fro m 0- 2 fee t dept h i n th e tes t hole s wil l b e composite d int o on e sampl e pe r fluvia l are a an d analyze d fo r the nutrient s liste d i n Tabl e 2-2 , i f the tailin g does not suppor t vegetation

.
• Dat a concernin g th e drainag e basi n characteristics
, annua l precipitatio n an d runoff
, soi l cover , an d infiltratio n rate s wil l b e compile d fro m existin g sources
. Contributin g an d noncontributin g watershe d area s wil l b e delineate d o n U.S

. Geologica l Surve y 7 1/ 2 minut e topographica l map s o f th e area
. Precipitatio n dat a wil l b e compile d fro m th e Leadvill e precipitatio n gage record s an d the Precipitatio n Frequenc y Atla s o f the Wester n Unite d State s (NOA A 1973)

. Soil distributio n map s (Soi l Conservatio n Servic e an d equivalent ) wil l b e reviewe d t o interpre t soi l type s an d characteristics

. Annua l runof f wil l b e estimate d fro m th e probabl e maximu m precipitatio n estimate s give n i n NOA A (198 4 an d 1988)

. Infiltratio n rate s wil l b e estimate d on th e basi s o f precipitatio n data
, soi l cover , an d runof f data

.

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TABL E 2- 1 SUMMAR Y O F STATEMENT S USE D I N TH E DEVELOPMEN T O F DQO s FO R TAILIN G A T CALIFORNI A GULC H SIT E 

### Dat a Use Dat

a Nee d

- Locat e apparen t surfac e an d subsurfac e contaminan t source s

- Defin e distributio n o f contaminant s

- Determin e leachin g potentia l

- Estimat e mobilit y o f contaminant s


### Evaluat e parameter s fo r developmen t an d evaluatio n o f remedia l alternative s Evaluat e rate s an d pathway s o f exposure s an d huma n healt h an d environmenta l risk s Asses s tailin g impoundment s pile s a s potentia l source s o f surfac e wate r contaminatio n Evaluat e hydrologi c parameters fo r developmen t an d evaluatio n o f remedia l alternative s Defin e qualit y o f wate r ponde d o n tailin g Identif y tailin g stratigraph y - Analysi s o f tailin g a t varyin g depth s an d location s fo r tota l metal s

- Analysi s o f tailin g at varyin g depth s 

### an d locations fo r tota l metal s

- Leac h tes t dat a fo r metal s fro m tailin g sample s and analysi s o f water withi n tailin g

- Analysi s o f tailin g at varyin g depth s an d location s fo r tota l metals

. Leac h tes t dat a on tailin g samples

. Analysi s o f groundwate r withi n tailin g an d immediatel y downgradien t fro m tailin g

- Analysi s o f tailin g a t varyin g depth s an d locations fo r tota l metals

. Geotechnica l testin g o f tailin g an d foundatio n soi l propertie s

- Analysi s o f tailin g fo r tota l metals

. Groundwate r an d surfac e wate r samplin g an d analysi s

- Analysi s o f surfac e wate r sample s collecte d upgradien t an d downgradien t 

### o f tailing

.

- Compil e drainag e basi n characteristic s includin g siz e o f watersheds
, precipitation , soi l cover , runoff
, an d infiltratio n rate s

- Analysi s o f ponde d wate r sample s

- Tes t hole s drille d an d logge d t o bedroc k

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TABL E 2- 1 (Concluded ) Dat a Us e Dat

a Nee d

- Perfor m tailin g pil e stabilit y analysi s - Geotechnica l propertie s o f tailin g an d foundatio n material
, an d locatio n o f groundwate r

- Evaluat e groundwate r flo w - Instal l piezometer s screene d i n tailin g an d foundatio n materia l an d monitor groundwate r leve l

- Asses s tailin g pile s a s potentia l - Analysi s o f groundwate r sample s fro m source s o f groundwate r withi

n an d downgradien t o f th e tailin g contaminatio n

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TABL E 2- 2 TAILIN G ANALYTICA L PARAMETER S

Tota l Analyte s fo r Surfac e an d Subsurfac e Sample s (Min e Wast e an d Foundation ) 75 % o f Sample s Metho d

131 2 fo r Subsurfac e Min e Wast e Sample s Ris

k Assessmen t Metal s fo r Surfac e an d Subsurfac e Sample s (Tailin g an d Foundation ) 25 % o f Sample s Arseni c (As ) Cadmiu m (Cd ) Lea d (Pb ) Zin c (Zn ) Arseni

c (As ) Cadmiu m (Cd ) Lea d (Pb ) Zinc(Zn )
Nutrient s fo r Tailin g Sample s fro m 0- 2 f t Dept h Tota l Phosphorou s (P ) Tota l Potassium (K ) Tota l Organi c Carbo n (TOC ) Antimon y (Sb ) Arseni c (As ) Bariu m (Ba ) Berylliu m (Be ) Cadmiu m (Cd ) Chromiu m (Cr ) Coppe r (Cu ) Lea d (Pb ) Manganes e (Mn ) Mercur y (Hg ) Nicke l (Ni ) Silve r (Ag ) Thalliu m (Tl ) Zin c (Zn )

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### Woodward-Clyd e Consultant s

TABL E 2- 3 PONDE D WATE R SAMPL E ANALYTICA L PARAMETERS

1 FIEL D ANALYSI S p H Specifi c conductanc e (SC ) Dissolve d oxyge n (DO ) Wate r temperatur e LABORATOR Y ANALYSI S Majo r Constituent s (Total ) P H Specifi c conductanc e (SC ) Tota l dissolve d solid s (TDS ) Tota l suspende d solid s (TSS ) Alkalinit y Tota l phosphoru s (P ) Bicarbonat e (HCO 3 ~ ) Metal s (Tota l an d Dissolved ) Aluminu m (Al ) Antimon y (Sb ) Arseni c (As ) Bariu m (Ba ) Berylliu m (Be ) Cadmiu m (Cd ) 

### Calciu m (Ca ) Chromium

, tota l (Cr ) Chromium

, trivalent (Cr + 3 ) 2 Cobal t (Co ) Coppe r (Cu ) Cyanid e (CN" ) Iro n (Fe ) Carbonat e (CO/ ) Sulfat e (SO 4 2

- ) Chlorid e (Cl' ) Silic a (SiO 2) Fluorid e (F ) Nitrat e + Nitrit e
Lead (Pb ) 

### Magnesiu m (Mg ) Manganes e (Mn ) Mercur y (Hg ) Nicke l (Ni ) Potassiu m (K ) Seleniu m (Se ) Silve r (Ag ) Sodiu m (Na ) Thalliu m (Tl ) 

### Vanadiu m (V ) Zin c (Zn ) Thi s lis t i s tha t require d fo r th e wate r treatmen t facilit y operations

. 2 

### Determine d b y subtractin g th e valu e o f hexavalent chromiu m fro m that o f tota l chromium

. 22443-22327/R14T.2- 3

7-30-91/RPT/ 5 Shee t 1 o f 1

### Woodward-Clyd e Consultant s
TABL E 2- 4 SURFACE WATE R SAMPLE ANALYTICA L PARAMETERS

1 FIEL D ANALYSI S p H Specifi c conductanc e (SC ) Dissolve d oxyge n (DO ) 

### Wate r temperatur e LABORATOR Y ANALYSI S P H Specifi c conductanc e (SC ) Tota l suspende d solid s (TSS ) Tota l dissolve d solid s (TDS ) Dissolve d organi c carbo n (DOC ) Majo r constituent s an d inorganic s (total ) Alkalinit y Calciu m (Ca ) Magnesiu m (Mg ) Sodiu m (Na ) Potassiu m (K ) Bicarbonat e (HCO 3 ~ ) Carbonat e (CO 3 2 ) Metal s an d trac e constituent s (Tota l an d Dissolved ) Aluminu m (Al ) Antimon y (Sb ) Arseni c (As ) Bariu m (Ba ) Cadmiu m (Cd ) Chromiu m (Cr ) Coppe r (Cu ) Iro n (Fe ) 

### Lea d (Pb ) Chlorid

e (CT ) 

### Sulfat e (S0 4 2



### - ) Silic a (SiO 2 ) Tota l phosphorou s (P ) Fluorid e (F ) Nitrat e and nitrit e
Manganes e (Mn ) Mercur y (Hg ) Nicke l (Ni ) 

### Seleniu m (Se ) Silve r (Ag ) Zin c (Zn ) Cyanid e (CN' )
Sam e a s thos e specifie d i n th e Surfac e Wate r Wor k Pla n (Res-ASARC O 1991b)

. 22443-22327/R14T.2- 4

07-30-91/RIT/ 6 Shee t 1 o f 1

### Woodward-Clyd e Consultant s
TABL E 2- 5 GROUNDWATE R SAMPLE ANALYTICA L PARAMETER S FIEL D ANALYSI S p H 

### Specifi c conductanc e (SC ) Wate r temperatur e LABORATOR Y ANALYSI S p H Specifi c conductanc e (SC ) Tota l dissolve d solid s (TDS ) Dissolve d organi c carbo n (DOC ) Majo r Constituent s an d Inorganic s (Total ) Alkalinit y Chlorid

e (Cl' ) Calciu m (Ca ) Sulfat

e (SO 4 2 ) Magnesiu m (Mg ) Silic a

(SiO 2 ) Sodiu m (Na ) Tota l

phosphorou s (P ) Potassiu m (K ) Fluorid

e (F ) Bicarbonat e (HCO 3 " ) Nitrat

e an d nitrit e Carbonat e (CO 3 2

- ) Metal s an d Trac e Constituent s (Dissolved ) Aluminu m (Al ) Manganes e

(Mn ) Antimon y (Sb ) Mercur

y (Hg ) Arseni c (As ) Nicke l

(Ni ) Bariu m (Ba ) Seleniu m

(Se ) Cadmiu m (Cd ) Silve r

(Ag ) Chromium (Cr ) Zinc

(Zn ) Coppe r (Cu ) Cyanid e (CN' ) Iro n (Fe ) Lea d (Pb )

__________

22443-22327/R14T.2- 5

07-30-91/RPT/ 6 Shee t 1 O f 1E P A REGIO N VII I SUPERFUN D DOCUMEN T MANAGEMEN

T SYSTE M
DO C I D # i IMAGER Y COVE R SHEE T UNSCANNABL E ITEM(S ) Contac t th e Superfun d Record s Cente r t o vie w thi s (these ) document(s)

. (303-312-6473)

SIT E NAME :

REPOR T O R DOCUMEN T TITLE :

DAT E O F DOCUMEN T

### Woodward-Clyd e Consultant s

3. 0 SAMPLIN G AN D ANALYSI S PLA N
T h e Samplin g an d Analysi s Pla n (SAP)

, Ya k Tunne l Operabl e Unit

, Californi a Gulch Site

, Leadville

, Colorado

, Revisio n 3. 0 (Res-ASARC O 1990c ) wil l b e use d a s th e SA P fo r thi s wor k plan

. Modification s t o th e Ya k Tunne l SA P whic h ar e applicabl e t o thi s wor k pla n ar e presente d below

. The SA P i s compose d o f the followin g parts :

• Fiel d Samplin g Pla n • Qualit y Assuranc e Projec t Pla n • Standar d Operatin g Procedure s
3 . 1 FIEL D SAMPLIN G PLA N Thi s Fiel d Samplin g Pla n (FSP ) describes th e samplin g task s require d fo r th e remedia l investigatio n o f seve n tailin g disposa l site s an d nin e potentia l fluvia l tailin g deposit s locate d withi n th e Californi a Gulc h Site

. Th e FS P detail s th e sampl e types , location s an d frequency
, sampl e handlin g an d labeling
, planne d analyses
, documentatio n an d reporting , an d qualit y assurance/qualit y control (QA/QC ) requirements

. 3.1. 1 Samplin g Objectives

, Locations

, and Frequenc y T h e objective s o f th e samplin g progra m fo r th e taiHn g impoundments
, piles
, an d deposit s 

### are t o (1 ) characterize th e chemica l compositio n o f th e tailing
, (2 ) characteriz e th e leachin g potentia l o f th e tailin g material
, (3 ) evaluat e th e engineerin g propertie s o f th e tailin g an d foundatio n material
, (4 ) collec t th e necessar y informatio n (i.e.

, chemical
, geotechnical
, geologic
, hydrologic ) t o selec t an d evaluat e remedia l actio n alternatives
, (5 ) evaluat e th e qualit y o f wate r ponde d o n th e tailing
, i f present , an d (6 ) asses s th e tailin g area s a s potentia l source s o f surfac e wate r an d groundwate r contamination

. Sample s wil l b e collecte d fro m eac h o f seve n tailin g disposa l site s an d thos e fluvia l tailin g deposit s selecte d fo r investigatio n describe d i n Sectio n 2. 3 t o mee t th e abov e 

### objectives

. Analyse s t o b e performe d on specifi c sampl e type s are liste d i n Tabl e 3-1

. 22443-22327/R14. 3 07-30-91/RPT/ 6 3- 1

### Woodward-Clyd e Consultant s Specifi c samplin g and drillin g location s wil l b e designate d i n the fiel d upon sit e reconnaissance prio r t o th e star t o f drilling

. Th e sample s wil l b e collecte d durin g th e 

### summe r and fal l o f 1991

. Sample s wil l b e collecte d fo r geotechnica l and geochemica l analyse s o f th e following :

• Surfac e material (0-2 inches ) • Unsaturate d tailin g (i f present ) • Saturate d tailin g (i f present ) • Foundatio n materia l underlyin g th e tailin g 3.1. 2 Fiel d Procedure s Standar d Operatin g Procedures (SOPs ) fo r th e installation
, development
, an d samplin g o f monitorin g well s hav e bee n develope d fo r th e Ya k Tunne l Operabl e Uni t an d ar e include d i n th e Ya k Tunne l Samplin g an d Analysi s Pla n (SAP ) (Res-ASARCO 1990c)

. Th e followin g SOP s fro m th e Ya k Tunne l SA P (Res-ASARC O 1990c ) ar e applicabl e t o thi s project : No

. 2 - Monitorin g Wel l Wate r Leve l Measurement No

. 3 - Groundwate r

Monitorin g Wel l an d Piezomete r Installatio n No

. 4 - Monitorin g Wel l Developmen t No

. 5 - Groundwate r

Monitorin g Wel l Samplin g SOP s fo r th e collectio n o f surfac e wate r sample s an d measuremen t o f surfac e wate r flo w wer e develope d fo r th e curren t surfac e wate r progra m (Res-ASARCO 1991c)

. T h e followin g SOP s fro m th e Surfac e Wate r Wor k Pla n (Res-ASARC O 1991c ) ar e 

### applicabl e t o thi s project : No

. 1 A
- Surfac e Wate r Flo w Measuremen t No

. 2 A
- Surfac e Wate r Sampl e Collectio n

22443-22327/R14. 3

07-30.91/RPT/ 6 3- 2

### Woodward-Clyd e Consultant s

F o r samplin g ponde d wate r fro m th e tailin g impoundments
, th e procedure s liste d fo r 

### samplin g th e surg e pon d wil l b e used
, a s specifie d i n th e followin g SO P fro m th e Ya k Tunne l SA P (Res-ASARCO 1990c) : N o

. 8 - Surfac e Wate r Sampl e Collectio n Th e followin g SOP s wer e develope d specificall y fo r th e Tailin g Wor k Pla n an d include d i n Appendi x A : Tailin g No

. 1 - Geotechnica l Investigatio n o f Tailin g Disposa l Area s Tailin g No

. 2 - Near-Surfac e Tailin g Sampl e Collectio n Th e monitorin g well s describe d i n Sectio n 2. 3 wil l provid e groundwate r leve l measurement s a t th e tailin g sites

. Th e numbe r an d scree n interva l o f th e monitorin g well s wil l b e reviewe d base d a n observation s o f groundwate r occurrenc e durin g drilling

. Installatio n o f monitorin g well s wil l b e i n accordance wit h SO P No

. 3 , Groundwate r Monitorin g Wel l an d Piezomete r Installation

. 3.1.3 Sampl e Handling

, Documentation

, an d Analysi s Procedure s fo r sampl e handling
, prope r sampl e containers, an d shippin g ar e presente d i n th e followin g SO P fro m th e Ya k Tunne l SA P (Res-ASARC O 1990c) : 

### No

. 1 0 - Sampl e Handling

, Documentation

, and Analysi s Require d containers , holdin g times , an d preservative s fo r thi s projec t ar e liste d i n Tabl e 3-2

. Chemical preservative s liste d appl y onl y t o water samples

. Tabl e 1 h i SO P No

. 1 0 (Res-ASARC O 1990c ) ha s bee n revised t o b e applicabl e t o th e collectio n o f tailin g sample s an d i s presente d i n Table s 3- 5 an d 3- 6 o f thi s wor k plan

. I f a borin g i s complete d a s a monitorin g well
, th e wel l (boring ) wil l b e identifie d for 

### groundwate r monitoring/samplin

g purpose s a s specifie d i n Tabl e 3-7

. Therefore

, i f a borin g i s no t converte d t o a monitorin g well
, n o wel l identificatio n numbe r wil l b e issue d fo r that borin g location

. 22443-22327/R14. 3 07-30-91/RPT/ 6 3- 3

### Woodward-Clyd e Consultant s

3.1.4 Decontaminatio n Th e procedure s fo r decontaminatio n o f samplin g equipment , drillin g equipment , an d personne l ar e presente d i n th e followin g SO P fro m th e Ya k Tunne l SA P (Res-ASARC O 1990c) : 

### No

. 1 - Decontaminatio n
3 2 QUALIT Y ASSURANC E PROJEC T PLA N T h e Qualit y Assuranc e Projec t Pla n (QAPP)

, Revisio n 3.0 , Marc h 18,1991 , Ya k Tunne l Operabl e Unit

, Californi a Gulc h Site

, Leadville

, Colorad o (Res-ASARC O 1990c ) wil l b e use d a s the QAP P fo r thi s wor k plan
, wit h the modification s presente d below

. Th e purpos e o f th e Qualit y Assuranc e Projec t Pla n i s t o document th e qualit y assuranc e requirement s applicabl e t o activitie s performe d a s par t o f th e Tailin g Wor k Plan

. Thi s pla n describe s th e requirement s o f th e qualit y assuranc e (QA ) progra m fo r organizing , planning
, performing
, reviewing , an d documentin g activitie s whic h affec t th e qualit y o f

wor k relate d t o th e Tailin g Wor k Plan

. Th e scop e o f thi s Qualit y Assuranc e progra m include s activitie s performe d b y Woodward-Clyd e Consultant s (W-C ) an d ASARC O afte r th e dat e o f EP A approva l o f th e Tailin g Work Plan

, a s authorize d b y ASARCO

. I t applie s t o wor k performe d a t th e Californi a Gulc h sit e an d vicinity , i n th e office
, an d laborator y testing

. 3.2. 1 Projec t Organizatio n Th e organization , responsibilities
, an d qualification s o f ke y W- C personne l concerne d wit h qualit y assuranc e fo r the Tailin g Wor k Pla n ar e specifie d i n Subsection s 3.2 , 3.3 , an d 3. 4 o f th e Qualit y Assuranc e Projec t Plan

, Revision No

. 3.0 , Marc h 18 , 1991 , Ya k Tunne l Operabl e Unit

, Californi a Gulc h Site

, Leadville

, Colorad o (Res-ASARC O 1990c ) (Ya k Tunne l QAPP)

.

22443-22327/R14. 3 07-30-91/RPT/ 6 3- 4

### Woodward-Clyd e Consultant s

32.2 Laborator y Chemical Analysi s wil l b e performe d b y CL P method s (EP A 1988 ) and Method s fo r 

### Chemical Analysi s o f Wate r an d Waste s (EP A 1983)

. Th e laborator y responsibilities
, analytica l parameter s an d procedures
, an d QA/Q C requirement s wil l b e thos e specifie d i n Sectio n 5. 0 o f th e Ya k Tunne l QAP P wit h th e followin g changes : Analytica l Parameter s an d Procedure s - Parameter s whic h wil l b e analyze d durin g th e implementatio n o f th e Tailin g Wor k Pla n ar e liste d i n Table s 2-2,2-3 , 2-4 , an d 2-5

. Tabl e 3- 1 list s th e analyse s t o b e performe d o n specifi c sampl e types

. Holdin g times , preservatives , an d sampl e container s required ar e liste d i n Tabl e 3-2

. Table s 3- 3 and 3- 4 lis t the specifi c analytica l procedures
, reportin g limits
, an d referenc e document s t o b e utilize d fo r thi s wor k plan

. Seventy-fiv e percent o f the tailin g and foundatio n sample s collecte d wil l b e analyze d fo r arsenic , cadmium
, lead
, and zin c accordin g t o the method s specifie d i n th e CL P Statemen t o f Wor k fo r Inorganic s Analysi s (EP A 1988 ) an d it s approve d revisions , an d arsenic , cadmium
, lead
, an d zin c b y th e EP A Metho d 131 2 Leac h Test

. Twenty-fiv e percen t o f th e tailin g an d foundation s sample s wil l b e analyze d for th e ris k assessment metal s liste d i n Tabl e 3- 2 b y CL P methods

. On e composit e sampl e pe r tailin g pil e wil l b e analyze d fo r th e nutrient s liste d i n Tabl e 3-2

. Surfac e wate r an d groundwate r sample s wil l b e analyze d fo r th e parameter s liste d i n Table s 3- 3 an d 3-4 , respectively

. Table s 4- 3 an d 4- 4 lis t th e specifi c analytes
, analytica l procedures
, an d reportin g limit s t o b e utilize d fo r th e analysi s o f thes e samples

. 3.2.3 Qualit y Assuranc e Objective s an d Qualit y Contro l Dat a qualit y objective s pertainin g t o accuracy , precision , completeness
, comparability
, representativeness , an d qualit y contro l check s ar e specifie d i n Section s 6. 2 an d 6. 3 o f th e Ya k Tunne l QAP P wit h th e followin g changes :


### • Tri p blank s ar e not applicabl e a s sample s collecte d a s part o f the Tailin g Wor k Plan ; sample s wil l no t b e analyze d fo r volatil e organi c compounds

. 22443-22327/R14. 3

07-30-91/RPT/ 6 3- 5

### Woodward-Clyd e Consultant s

3.2. 4 Dat a Validatio n Validatio n o f th e analytica l dat a generate d fro m sample s collecte d a s part o f th e Tailin g Wor k Pla n wil l b e a s describe d i n th e Ya k Tunne l QAPP

. 3.2. 5 Fiel d Samplin g Pla n an d Standar d Operatin g Procedure s A Fiel d Samplin g Pla n (FSP ) i s include d i n Subsectio n 3. 1 o f thi s Tailin g Wor k Plan

. The FS P i s tha t containe d i n the Ya k Tunne l Samplin g an d Analysi s Pla n (Res

- ASARC O 1990c)

, wit h sligh t modification s a s require d fo r thi s wor k plan

. Standar d Operatin g Procedure s (SOPs ) wer e writte n followin g th e guideline s describe d i n Section s 8. 0 an d 9. 0 o f th e Ya k Tunne l QAP P fo r thos e task s no t alread y covere d b y existin g Ya k Tunne l and surfac e wate r progra m SOPs

. 3.2. 6 Audits

, Nonconformances

,

an d Correctiv e Action s Syste m audit s an d correctiv e action s for nonconformanc e wil l b e a s specifie d i n Subsection s 10. 1 an d 10. 2 o f th e Ya k Tunne l QAPP

. Th e schedul e o f audit s t o b e performe d wil l b e a s specifie d i n Tabl e 10- 1 o f the Ya k Tunne l QAPP

. 3.2. 7 Qualit y Assuranc e Report s Qualit y assurance report s t o management wil l b e a s specifie d i n Sectio n 11. 0 o f th e Ya k Tunne l QAPP

.

22443-22327/R14. 3

07-30-91/RPT/ 6 3- 6

### Woodward-Clyd e Consultant s
TABL E 3- 1 ANALYSE S T O B E PERFORME D O N SPECIFI C SAMPLE TYPE S Sampl e Typ e Tailing

, surfac e Tailing

, unsaturate d Tailing

, saturate d Tailing

, bas e Foundatio n Ponde d wate r Groundwate r Surfac e wate r 1 

### Se e Tabl e 2- 2 2 Se e Tabl e 2- 2 Media tailin g tailin g tailin g tailin g soi l wate r wate r wate r Tota l Analytes 1 X X X X X Metho d 1312 2 X X X Geotechnica l

Wate r Analysis 3 Quality " X X X X X X X X Nutrients

5 X

fo r lis t o f "tota l analytes"

. f o r analytes

. rn-ili-i^^ k rl^-nci-K

r *-\ni-ii^> l

* a CIT ^ ^icfi-iVvn

f i f\r\ \irof^ f /^r\nt*a-n t

A ttArT^AffT limits
, consolidation
, strength
, permeability

. Se e Table s 2-3,2-4 , an d 2- 5 fo r parameter s t o b e analyze d fo r ponde d water , surfac e water , an d groundwater
, respectively

. Se e Tabl e 2- 2 fo r lis t o f nutrients

.

22443-22327/R14T.3- 1

07-30-91/RPT/ 6 Shee t 1 o f 1

### Woodward-Clyd e Consultant s

TABL E 3- 2 SAMPLE CONTAINERS

, PRESERVATIVES

, AN D HOLDIN G TIME S Analyt e Metal s Hexavalen t Chromiu m Chlorid e Fluorid e Silic a Sulfat e Specifi c conductanc e Nitrat e Tota l phosphorou s Cyanid e Alkalinit y Tota l dissolve d solid s Tota l suspende d solid s p H Carbonat e Bicarbonat e Container 1 P, G P, G P, G P P P, G P, G P, G P, G P, G P, G P, G P, G P, G P, G P, G Dissolve d Organi c Carbon P, G Tota l Organi c Carbo n Nitrat e an d Nitrat e 1 

### Bottl e code : P

* Al

l OOTMfvl^C 1 OT % P,G

, P, G Preservation 2 HNO 3 t o pH< 2

H 2 S O 4 topH< 2 H 2 S O 4 t o pH< 2 NaOHtopH<1 2

H C 1 o r H 2 S O 4 t o pH< 2 H C 1 o r H 2 S O 4 t o pH< 2 H 2 S O 4 topH< 2 Holdin

g Time 3 Note s 6 month s 4 2 4 hour s 2 8 day s 2 8 day s 2 8 day s 2 8 day s 2 8 day s 2 8 day s 2 8 day s 7 day s 1 4 day s 7 day s 7 day s 2 4 hour s 5 1 4 day s 1 4 day s 2 8 day s 2 8 day s 2 8 day s

= polyethylene
, G=glass

.
a +r \ V m * f oncT-krkffAr l

o-nr ! c+nra/3 o f A.°C^' \

'hf * Ah<iT«1/^Cl 1

nfACAfwatlw^ C indicate d abov e appl y onl y t o wate r samples

. Soi l an d sedimen t sample s ar e preserve d b y storag e a t 4°C

. Holdin g time s star t a t th e dat e o f sampl e collection

. Holdin g time s fo r metal s ar e 6 months
, excep t fo r mercury , whic h ha s a 28-da y holdin g time

. Th e laborator y mus t analyz e p H a s soo n a s possible

. However

, a s a practica l guidelin e fo r dat a validatio n purposes , th e holdin g time s wil l b e 1 day

.

22443-22327/R14T.3- 2

07-30-91/RPT/ 6 

### Shee t 1 o f 1

### Woodward-Clyd e Consultant s
TABL E 3- 3 ANALYTICA L METHOD S FO R CL P ANALYSE S O F TAILIN G AN D FOUNDATIO N SAMPLES

1 Paramete r Antimon y (Sb ) Arseni c (As ) Bariu m (Ba ) Berylliu m (Be ) Cadmiu m (Cd ) Chromiu m (Cr ) Coppe r (Cu ) 

### Lea d (Pb ) Leac h Tes t Manganes e (Mn ) Mercur y (Hg ) 

### Nicke l (Ni ) NO 3 a s N Phosphoru s (P ) Potassiu m (K ) Silve r (Ag ) 

### Thalliu m (Tl ) Tota l Organi c Carbo n (TOC ) Zin c (Zn ) Metho d

200. 7 CLP- M 206. 2 CLP- M 200. 7 CLP- M 200. 7 CLP- M 200. 7 CLP- M 200. 7 CLP- M 200. 7 CLP- M 239. 9 CLP- M 1 3 12 2 200. 7 CLP- M 245. 5 CLP- M 200. 7 CLP- M 353.2 3 365.3 3 200. 7 CLP- M 200. 7 CLP- M 279. 2 CLP- M 415. 1
200. 7 CLP- M Reportin

g Limi t (mg/kg) 4 6. 0 1. 0 1. 0 2 0 0. 5 1. 0 2. 5 0. 5 ( 5 ) 1. 5 0. 1 4. 0 0. 5 0. 5 50 0 1. 0 1. 0 * *

2. 0

22443-22327/R20T.4- 3

07-29-91/RPT/ 8 ShCC t 1 O f 2

### Woodward-Clyd e Consultant s
TABL E 3- 3 (Concluded )



### N A No t applicabl e 1 USEP A Contrac t Laborator y Program Statemen t o f Wor k fo r Inorganic Analysis

, Multi-media

, Multi-concentration

,

SO W 78 8 (Jul y 1988)

. Twenty-fiv e percen t o f th e tailin g an d foundatio n sample s collecte d wil l b e analyze d fo r th e expande d 

### lis t o f metal s show n abov e accordin g t o CL P protocols

. 2 Syntheti c Precipitatio n Leac h Tes t fo r Soils

. 3 USEP A Method s fo r Chemical Analysi s o f Wate r an d Wastes

, EP A 600/4-79-020

, Marc h 1979 , Revise d Marc h 198 3 (EP A 1983)

. 4 The limit s liste d i n thi s tabl e ar e compute d fro m the detectio n limit s obtaine d i n pur e wate r an d assume s a 1 gra m sampl e weight

. Actua l reportin g limi t wil l b e adjuste d fo r sampl e size

. 5 Result s reporte d i n /tg/1 a s describe d i n Metho d 1312 , SW-846

. * * Reportin g limi t dependen t o n analytica l metho d utilize d an d o n sampl e matrix

.

22443-22327/R20T.4- 3

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### Woodward-Clyd e Consultant s
TABL E 3- 4 ANALYTICA L METHOD S FO R ANALYSI S O F WATE R SAMPLE S Paramete r INORGANIC S (jig/L ) Aluminu m (Al ) Antimon y (Sb ) Arseni c (As ) Bariu m (Ba ) Cadmiu m (Cd ) Chromium

, tota l (Cr ) Coppe r (Cu ) Iro n (Fe ) Lead (Pb ) Manganes e (Mn ) Mercur y (Hg ) Nicke l (Ni ) Seleniu m (Se ) Silve r (Ag ) Zin c (Zn ) Cyanid e (CN" ) INORGANIC S (mg/L ) Alkalinit y Calciu m (Ca ) Magnesiu m (Mg ) Sodiu m (Na ) Potassiu m (K ) Tota l phosphoru s (P ) Carbonat e (CO 3 = ) Metho d

200. 7 CLP-M 1 200. 7 CLP-M 1 206. 2 CLP-M 1 200. 7 CLP-M 1 200. 7 CLP-M 1 200. 7 CLP-M 1 200. 7 CLP-M 1 200. 7 CLP-M 1 239. 9 CLP-M 1 200. 7 CLP-M 1 245. 5 CLP-M 1 200. 7 CLP-M 1 270.2 CLP-M 1 200. 7 CLP-M

1 200. 7 CLP-M 1 335. 2 CLP-M 1

310.1 2 200. 7 CLP-M 1 200. 7 CLP-M 1 200. 7 CLP-M 1 200. 7 CLP-M 1 36S.3 2 310.1 2 Reportin

g Limi t

20 0 6 0 1 0 20 0 5 1 0 2 5 10 0 3 1 5 0. 2 4 0 5 1 0 2 0 1 0

5 5 5 5 5 0.0 5 5

22443-22327/R20T.4- 4

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### Woodward-Clyd e Consultant s
TABL E 3- 4 ANALYTICA L METHOD S FO R ANALYSI S O F WATE R SAMPLE S (Concluded ) Paramete r Bicarbonat e (HCO 3 ~ ) Sulfate (SO 4 = ) Chlorid e (C? ) Silic a (SiO 2 ) Fluorid e (F ) Nitrat e an d nitrat e WATE R QUALIT Y (mg/L ) Tota l suspende d solid s (TSS ) Tota l dissolve d solid s (TDS ) Dissolve d organi c carbo n (DOC ) Specifi c conductanc e
P H Metho d 310.1 2 300.0 2 300.0 2 200. 7 CLP-M 1 340.2 2 353.2 2

160.2 2 160.1 2 415.1 2 120

. 1 2 150 2 Reportin

g Limi t 5 5 5 0. 2 0. 1 0. 1

2 1 0 0. 5 N A N A N A No t Applicabl e 1 USEP A Contrac t Laborator y Progra m Statemen t o f Wor k fo r Inorganic Analysis

, Multi-Media

, Multi-Concentration

,

SO W 78 8 (Jul y 1988)

. 2 USEP A Method s fo r Chemica l Analysi s o f Wate r an d Wastes

, EP A 600/4-79-020

, March

, 1979 , Revised Marc h 198 3 (EP A 1983)

.

22443-22327/R20T.4- 4

07-29-91/RPT/ 6 Shee t 2 o f 2

### Woodward-Clyd e Consultant s
TABL E 3- 5 TAILIN G SURFAC E SAMPLE IDENTIFICATIO N

KE Y Exampl e Sampl e ID : A-OG1W-01-91080 1 A = Samplin g Compan y (here

, ASARCO ) O G = Tailin g pil e designatio n (here

, Orego n Gulch )
1 = Impoundmen t

numbe r W = Matri x o f Sampl e (here

, ponde d water ) 0 1 = Typ e o f Sampl e (here

, primar y sample ) 91080 1 = Dat e o f Sampl e Collectio n (Yea r Mont h Day ) Firs t fiel d wil l be : "A " fo r ASARC O o r "W " fo r Woodward-Clyd e Consultant s Secon d fiel d consist s o f thre e components : Th e firs t componen t i s a two-characte r designatio n fo r th e tailin g disposa l area , an d wil l be : "OG " fo r Orego n Gulch "Fl "

fo r Fluvia l Sit e 1 , o r "AP " for Apache

, or "F2 "

for Fluvia l Sit e 2 , or "HC " for Hecla

, or "F3 "

for Fluvia l Sit e 3 , or "MA " for Malta

, or "F4 "

for Fluvia l Sit e 4, or "HM " fo r Hamm s Mill

, o r "F5 "

fo r Fluvia l Sit e 5 , o r "PN " fo r Penrose

, o r "F6 "

fo r Fluvia l Sit e 6 , o r "CZ " fo r Colorad o Zin c Lead

, o r "F

T fo r Fluvia l Sit e 7 , o r "F8 " fo r Fluvia l Sit e 8 , o r "F9 " fo r Fluvia l Sit e 9 Th e secon d componen t i s a one-numbe r cod e whic h designate s th e tailin g impoundmen t fo r th e tailin g disposa l are a (i.e.

, Hecl a tailin g i s compose d o f seve n impoundment s numbere d 1-7)

. 22443E-22327/R14T.3- 5

C7-30-91/RPT/ 6 Shee t 1 O f 2

### Woodward-Clyd e Consultant s
TABL E 3- 5 

### (Concluded ) The thir d componen t i s a one-lette r designatio n fo r th e sampl e matrix , an d wil l be : "W " fo r ponde d water , o r T fo r composit e surfac e tailin g Thir d fiel d wil l be : "01 " fo r primar y sampl e "02 " fo r duplicat e sampl e "03 " fo r fiel d blan k "04 " fo r equipmen t rinsat e "MS " fo r matri x spik e an d duplicat e Fourt h fiel d wil l be : Yea r Mont h Da y 

### (Dat e Sampl e Collected )

22443E-22327/R14T.3- 5

07-30-91/RPT/ 6 Shee t 2 O f 2

### Woodward-Clyd e Consultant s
TABL E 3- 6 TAILIN G BOREHOL E SAMPLE IDENTIFICATIO N

KEY Exampl e Sampl e ID : A-OG1B101T-01-91080 1 A = Samplin g Compan y (here

, ASARCO ) O G = Tailin g Pil e designatio n (here

, Orego n Gulch )
1 = Impoundmen t numbe r B l = Borehol e numbe r (here

, Borehol e numbe r 1 ) 0 1 = Dept h o f sampl e (here

, 0-2 depth ) T = Sampl e Matri x (here

, tailing ) 0 1 = Typ e o f Sampl e (here

, primar y sample ) 91080 1 = Dat e o f Sampl e Collectio n (Yea r Mont h Day ) Firs t fiel d wil l be : "A " fo r ASARC O o r "W " fo r Woodward-Clyd e Consultant s Secon d fiel d consist s o f fiv e components : Th e firs t componen t i s a two-characte r designatio n fo r th e taihn g disposa l area , an d wil l be : "OG " for Orego n Gulch

, or "Fl "

for Fluvia l Sit e 1 , or "AP " for Apache

, or "F2 "

for Fluvia l Sit e 2 , or "HC " fo r Hecla

, o r "F3 "

fo r Fluvia l Sit e 3 , o r "MA " fo r Malta

, o r "F4 "

fo r Fluvia l Sit e 4 , o r "HM " fo r Hamms Mill

, o r "F5 "

fo r Fluvia l Sit e 5 , o r "PN " for Penrose

, or "F6 "

for Fluvia l Sit e 6 , or "CZ " for Colorad o Zin c Lead

, or "F7 "

for Fluvia l Sit e 7 , or 22443E-22327/R14T.3- 6

07-30-91/RPT/ 6 Shee t 1 O f 2

### Woodward-Clyd e Consultant s
TABL E 3- 6 (Concluded )

"F8 "

fo r Fluvia l Sit e 8 , o r "F9 " fo r Fluvia l Sit e 9 The secon d componen t i s a one-numbe r cod e whic h designate s th e tailin g impoundmen t fo r th e tailin g disposa l are a (i.e.

, Hecl a tailin g i s compose d o f seve n impoundment s numbere d 1-7)

. Th e thir d componen t i s th e lette r "B " followe d b y a numbe r betwee n 1 an d 9 , an d represent s the borehol e numbe r withi n the impoundmen t (i.e.

, 1B 1 = borehol e No

. 1 i n impoundmen t No

. 1 ) Th e fourt h componen t i s a two-numbe r cod e whic h designate s th e sampl e dept h i n th e borehol e an d wil l be : "01 " fo r 1s t dept h (here

, 0-2')

, "02 " fo r 2n d dept h Th e exac t depth s o f sampl e collectio n wil l b e recorde d i n th e fiel d notebook

. "BC " wil l b e use d t o designat e composit e sample s fro m 0-2 dept h i n al l boring s i n a particula r impoundment

. The fift h componen t i s a one-lette r cod e whic h designate s th e sampl e matrix , an d wil l be : "T " fo r tailing
, o r " S " fo r foundatio n soil s Thir d fiel d wil l be : "01 " fo r primar y sampl e "02 " fo r duplicat e sampl e "03 " fo r fiel d blan k "04 " fo r equipmen t rinsat e "MS " fo r matri x spik e an d duplicat e Fourt h fiel d wil l be : Yea r Mont h Da y (Dat e sampl e collected )

22443E-22327/R14T.3- 6

07-30-91/RPT/ 6 Shee t 2 O f 2

### Woodward-Clyd e Consultant s
TABL E 3- 7 TAILIN G MONITORIN G WEL L IDENTIFICATIO N

KE Y Exampl e Sampl e ID : A-OG1TMW1-01-91080 1 A = Samplin g Compan y (here

, ASARCO ) O G = Tailin g Pil e Designatio n (here

, Orego n Gulch ) 

### 1 = Impoundmen t numbe r TMW 1 = Tailin g monitorin g wel l numbe r (correspond s wit h borehol e numbe r i n Tabl e 3-6 ) 

### 0 1 = Typ e o f sampl e 91080 1 = Dat e o f Sampl e Collectio n (Yea r Mont h Day ) Firs t fiel d wil l be : "A " fo r ASARC O o r "W " fo r Woodward-Clyd e Consultant s Secon d fiel d consist s o f thre e components : Th e firs t componen t i s a two-characte r designatio n fo r th e tailin g disposa l area , an d wil l be : "OG " fo r Orego n Gulch

, o r "Fl "

fo r Fluvia l Sit e 1 , o r "AP " for Apache

, or "F2 "

for Fluvia l Sit e 2 , or "HC " fo r Hecla

, o r "F3 "

fo r Fluvia l Sit e 3 , o r "MA " fo r Malta

, o r "F4 "

fo r Fluvia l Sit e 4 , o r "HM " fo r Hamm s Mill

, o r "F5 "

fo r Fluvia l Sit e 5 , o r "PN " fo r Penrose

, o r "F6 "

fo r Fluvia l Sit e 6 , o r "CZ " for Colorad o Zinc Lead

, or "F7 " for Fluvia l Sit e 7 , or "F8 " for Fluvia l Sit e 8 , or "F9 " fo r Fluvia l Sit e 9 The secon d component i s a one-numbe r cod e whic h designate s the tailin g impoundmen t fo r th e tailin g disposa l are a (i.e.

, Hecl a tailin g i s compose d o f seve n impoundment s numbere d 1-7)

.
22443E-22327/R14T.3- 7

07-30-91/WT/ 6 Shee t 1 O f 2

### Woodward-Clyd e Consultant s
TABL E 3- 7 

### (Concluded )
Th e thir d componen t i s th e lette r "TMW " (tailin g monitorin g well ) followe d b y a numbe r whic h correspond s t o th e borin g numbe r liste d i n Tabl e 3-6

. Thir d fiel d wil l be : "01 " for primar y sampl e 

### "02 " fo r duplicat e sampl e "03 " fo r fiel d blan k "04 " fo r equipmen t rinsat e "MS " fo r matri x spik e an d duplicat e Fourt h fiel d wil l be : Yea r Mont h Da y 

### (Dat e sampl e collected )

22443E-22327/R14T.3- 7

07-30-91/RPT/ 6 Shee t 2 O f 2

### Woodward-Clyd e Consultant s

4. 0 HEALT H AN D SAFET Y PLA N


### T h e Healt h an d Safet y Pla n fo r thi s tas k wil l b e th e Sit e Healt h an d Safet y Plan

, Ya k Tunne l Operabl e Unit

, Californi a Gulc h Site

, Leadville

, Colorado

, Revision 2. 0 (Res

- ASARC O 1990d)

.

22443-22327/R14. 4

07-30-91/RPT/ 5 4- 1

### Woodward-Clyd e Consultant s

5. 0 SCHEDUL E
A schedul e fo r implementatio n o f thi s wor k pla n i s presente d i n Figur e 5

.

22443-22327/R14. 5

07-30-91/RPT/ 6 5- 1

### i

Figur e 5 SCHEDUL E FO R IMPLEMENTATIO N

O F TH E TAILIN G WOR K PLA N

FINA L REPOR T T O EP A FIEL D RECONNAISSANC E MOBILIZATIO N FIEL D INVESTIGATIO N LABORATOR Y TESTIN G REPORTING/DAT A COMPILATIO N JUN

E JULY 

### A

••M

M AUGUS

T

•—

— SEPTEMBE R OCTOBE R NOVEMBE R

——— —

### Woodward-Clyd e Consultant s

6. 0 REFERENCE S 

### Colorad o Departmen t o f La w (CDL)

. 1986a

. Ya k Tunnel/Californi a Gulc h Feasibilit y Study

, Leadville

, Colorado

. Prepare d b y Engineering-Science

,

Inc

. Augus t 7 , 1986

. 

### Colorad o Departmen t o f La w (CDL)

. 1986b

. Ya k Tunnel/Californi a Gulc h Remedia l Investigation

, Leadville

, Colorado

. Prepare d b y Engineering-Science

,

Inc.

, 

### Denver

, Colorado

. Februar y 28 , 1986

. Environmenta l Protectio n Agenc y (EPA)

. 1983

. USEP A Method s fo r Chemica l Analysi s o f Wate r and Wastes

. EP A 600/4-79-020

. Marc h 1979

. Revised Marc h 1983

. 

### Environmenta l Protectio n Agenc y (EPA)

. 1988

. Laborator y Dat a Validatio n Functiona l Guideline s fo r Evaluatin g Inorgani c Analyses

. July

, 1988

. Nationa l Oceani c an d Atmospheri c Administratio n (NOAA)

. 1973

. Precipitatio n Frequenc y Atla s o f th e Wester n U.S.

, Colorado

, Vol

. III

. NOAA

. 1984

. Probabl e Maximum Precipitatio n Estimates

, Unite d State s Betwee n th e Continenta l Divid e an d 103r d Meridian

, Hydrometeorologica l

Repor t No

. 55 , Silve r Spring

, Maryland

. NOAA

. 1988

. Probabl e Maximu m Precipitatio n Estimates

, Unite d State s Betwee n th e Continenta l Divid e and 103r d Meridian

, Hydrometeorologica l

Repor t No

. 55A

, Silve r Spring

, Maryland

. Res-ASARCO

. 1986

. Report o n the Stabilit y and Reclamatio n Evaluations

, Abandone d Tailin g Ponds

, Leadville

, Colorado

. Prepare d b y Dame s an d Moore

. February

, 1986

.

22443-22327/R14. 6 07-30-91/RPT/ 6 6- 1

### Woodward-Clyd e Consultant s
Res-ASARCO

. 1990a

. Sit e Improvement s for : Garibald i Workings

, Nort h Mik e Workings

, Orego n Gulc h Tailin g Pond

, Star r Ditch

. Prepare d b y Woodward-Clyd e Consultants

. September

, 1990

. Res-ASARCO

. 1990b

. Draf t Preliminar y Healt h Ris k Assessment

, Californi a Gulc h Site

, Leadville

, Colorado

. Prepare d b y Woodward-Clyd e Consultants

. October

, 1990

. Res-ASARCO

. 1990c

. Samplin g an d Analysi s Plan

, Ya k Tunne l Operabl e Unit

, Californi a Gulc h Site

, Leadville

, Colorado

. Prepare d b y Woodward-Clyd e 

### Consultants

. April

, 1990

. Revised

, November

, 1990 , and March

, 1991

. Res-ASARCO

. 1990d

. Sit e Healt h an d Safet y Plan

, Ya k Tunne l Operabl e Unit

, Californi a Gulch Site

, Leadville

, Colorado

. Prepare d b y Woodward-Clyd e Consultants

. April

, 1990

. Res-ASARCO

. 1991a

. Draf t Remedia l Investigatio n Scopin g Document

, Californi a Gulc h Site

, Leadville

, Colorado

. Prepare d b y Woodward-Clyd e Consultants

. April

, 1991

. Res-ASARCO

. 19 9 Ib

. Draf t Hydrogeologi c Work Plan

, Californi a Gulc h Site

, Leadville

, Colorado

. Prepare d b y Woodward-Clyd e Consultants

. June

, 1991

. Res-ASARCO

. 1991c

. Surfac e Water

, Be d Material

, an d Aquati c Ecosyste m Dat a Collectio n Progra m Wor k Plan

, Californi a Gulch Site

, Leadville

, Colorado

. Prepare d b y Woodward-Clyd e Consultants

. June

, 1991

.

22443-22327/R14. 6 07-30-91/RPT/ 6 6- 2APPENDI X A STANDAR D OPERATIN G PROCEDURE S

22443E-22327/R14. A

07-30-91/RPT/ 6SOP Tailin g No

. 1 Revisio n No

. 1. 0 Date : June

, 199 1 Page 1 o f 1 7
1. 0 TITL E PAG E STANDAR D OPERATIN G PROCEDUR E TAILIN G NO

. 1 GEOTECHNICA L INVESTIGATIO N

OF TAILIN G DISPOSA L AREA S Californi a Gulch Sit e Leadville

, Colorad o Approvals : Projec t

Numbe r 22443E-2232 7 Dat e Originato r
Pee r Reviewe r
QA/Q C Office r Projec t Manage r
EP A Approva l S OP TAILIN G # 1 Revisio n No

. 1. 0 22443E-22327/R14. A

07-30-91/RPT/ 6 Geotechnica l Investigatio n o f Tailin g Disposa l Area s Date : 07-30-9 1 Page 1 o f 1 72. 0 TABL E O F CONTENT S Sectio n 1. 0 TITL E PAG E 1 2. 0 TABL E O F CONTENT S 2 3. 0 PURPOS E AN D SCOP E 4 4 . 0 RESPONSIBILITIE

S AN D QUALIFICATION

S 5 5. 0 PROCEDUR E

6 5. 1 DECONTAMINATIO

N 6 5. 2 EXCAVATIO

N PROCEDUR E 6 5. 3 DRILLIN

G PROCEDURE S 6 5.3. 1 Auge r Drillin g 6 5.3. 2 Rotar y Wash Drillin g 7 5.3. 3 Bedroc k Corin g 7 5. 4 SAMPLIN

G PROCEDURE S 8 5.4. 1 Split-Barre l Samplin g 8 5.4. 2 Thin-Walle d Tub e Samplin g 9 5.4. 3 Bul k Samplin g 9 5. 5 WATE R LEVEL S 1 0 5. 6 DOCUMENTATIO

N 1 0 5.6. 1 Fiel d Logboo k 1 0 5.6. 2 Tes t Trench an d Borin g Log s 1

2

S OP TAILIN G # 1 Geotechnica l

Investigatio n o f Tailin g Disposa l Area s Date : 07-30-9 1 Revisio n No

. 1. 0 Page 2 o f 1 7 22443E-22327/R14. A

07-30-9l/RPT/ 6TABL E O F CONTENT S (Concluded )

6. 0 LABORATOR Y

TESTIN G 1 3 6. 1 MOISTUR E CONTEN T 1 3 6. 2 ATTERBER G

LIMIT S 1 3 6. 3 SPECIFI C GRAVIT Y 1 3 6. 4 SIEV E ANALYSI S 1 3 6. 5 HYDROMETE

R ANALYSI S 1 3 6. 6 COMPACTIO N

1 4 6. 7 UNCONFINE

D COMPRESSIO N 1 4 6. 8 CONSOLIDATIO

N 1 4 6. 9 REMOLDE D SAMPLE 1 4 6.1 0 DENSIT Y DETERMINATIO

N 1 5 6.1 1 SOI L RESISTIVIT Y 1 5 6.1 2 TRIAXIA L COMPRESSIO N 1 5 6.1 3 TEST S FO R EXPANSIV E SOIL S 1 5 6.1 4 TEST S FO R LEACHABL E METAL S 1 5 7. 0 REFERENCE

S 1 7

SO P TAILIN G # 1 Geotechnica l

Investigatio n o f Tailin g Disposa l Area s Date : 07-30-9 1 Revision No

. 1. 0 Pag e 3 o f 1 7 22443&22327/R14. A

07-30-91/RPT/ 63. 0 PURPOS E AN D SCOP E
Th e purpos e o f thi s document i s t o defin e th e standar d procedur e fo r th e geotechnica l investigatio n conducte d for tailin g an d min e wast e disposa l area s a t th e Californi a Gulc h Site

, Leadville

, Colorado

. This Standar d Operatin g Procedur e (SOP ) serve s a s a supplemen t t o th e Qualit y Assuranc e Projec t Pla n (QAPP ) an d th e Fiel d Samplin g Pla n (FSP)

. Thi s procedur e give s description s o f th e equipmen t an d fiel d procedure s necessar y t o collec t soi l sample s an d othe r dat a fo r th e geotechnica l investigation

. A specificatio n providin g detail s o n 

### borin g location s an d test s planne d wil l b e prepare d prio r t o sampling

. Thi s procedur e i s intende d t o b e use d togethe r wit h th e FSP

, an d othe r SOPs

. SO P No

. 1 (Res-ASARC O 1990a ) describe s decontaminatio n procedure s whic h ar e applicabl e t o thi s SOP

. Healt h an d safet y procedure s an d equipmen t that wil l b e required durin g th e investigatio n ar e detaile d i n th e Sit e Healt h an d Safet y Pla n (Res-ASARC O 1990b)

. Th e geotechnica l investigatio n wil l consist o f excavatio n o f tes t trenches
, drillin g i n soil
, tailing
, and rock
, collectin g soi l and tailin g samples
, and measurin g groundwate r levels

. Sample s wil l b e collecte d fro m excavated materials
, auge r cuttings , split-barre l and thin



### walle d tub e samplers
, an d cores, wher e applicable

. Referenc e Standard s Whereve r a n "ASTM" designatio n i s cite d i n thi s document
, i t shal l refe r t o th e America n Societ y fo r Testin g an d Material s Standar d Specificatio n o f tha t designatio n appearin g i n the 199 0 Annua l Boo k o f AST M Standards

, publishe d b y the America n Societ y fo r Testin g an d Materials

, 191 6 Rac e Street

, Philadelphia

, Pennsylvania

. "E M 1110-2-1906 " refer s t o Unite d State s Departmen t o f the Army

, Engineerin g an d Desig n Manual

, Laborator y Soi l Testing

. 3 0 December 1970

. SO P TAILIN G # 1 Geotechnica l

Investigatio n o f Tailin g Disposa l Area s Date : 07-30-9 1 Revision No

. 1. 0 Page 4 o f 1 7 22443E-22327/R14. A

07-30-91/RPT/ 64. 0 RESPONSIBILITIE S

AN D QUALIFICATION

S
T h e Projec t Manage r (PM ) i s responsibl e fo r assignin g projec t staf f fo r fiel d activities

. Th e P M i s als o responsibl e fo r assurin g that thi s an d an y othe r appropriat e procedure s ar e followe d b y al l projec t personnel

. T h e projec t staf f assigne d t o fiel d activitie s ar e responsibl e fo r completin g thei r task s accordin g t o thi s an d othe r appropriat e procedures

. Al l staf f ar e responsibl e fo r reportin g deviations fro m th e procedur e t o th e PM

, Sit e Manager

, o r Projec t QA/Q C Officer

. Onl y qualifie d personne l shal l b e allowe d t o perfor m thi s procedure

. Qualification s ma y b e based o n previou s experienc e o r on-the-jo b trainin g an d supervisio n b y anothe r qualifie d person

.

SO P TAILIN G # 1 Geotechnica l

Investigatio n o f Tailin g Disposa l Area s Date : 07-30-9 1 Revisio n No

. 1. 0 Page 5 o f 1 7 22443E-22327/R14. A

07-30-91/RPT/ 65. 0 PROCEDUR E

5 . 1 DECONTAMINATIO

N Befor e excavation , drilling
, an d samplin g begins
, th e excavation , drilling
, an d samplin g 

### equipmen t wil l b e decontaminate d accordin g t o th e procedure s contained i n SO P No

. 1 fro m th e Ya k Tunne l SA P (Res-ASARC O 1990a)

. Excavation

, drilling
, an d samplin g equipmen t wil l b e decontaminate d betwee n borin g locations

. Samplin g equipmen t wil l als o b e decontaminate d befor e eac h sampl e i s taken

. 5. 2 EXCAVATIO

N PROCEDURE S Excavatio n procedure s consis t o f excavatin g tes t trenche s alon g th e face s o f th e min e wast e piles

. A small-to-medium-size d

backho e wil l b e use d t o excavate

. Excavation s wil l b e abou t 5 fee t b y 1 0 fee t i n pla n dimension s an d 5 t o 1 0 fee t deep

. Occupationa l Safet y an d Healt h Administratio n (OSHA ) requirement s wil l b e followe d fo r th e slop e steepnes s durin g th e excavations

. 5. 3 DRILLIN G PROCEDURE S Drillin g procedure s that ma y b e use d consist o f auge r drilling
, rotar y was h drilling
, and

roc k coring

. Th e procedure s fo r eac h drillin g metho d ar e provide d i n th e followin g sections

. 5.3. 1 Auge r Drillin g Auge r boring s wil l b e mad e usin g machine-drive n hollow-ste m fligh t auger s wit h a 4 J > 4 inc h minimu m inne r diamete r t o accommodat e a 3-inc h oute r diamete r thin-walle d tub e sample r and split-barre l sampler

. Auge r boring s wil l b e performe d i n accordanc e wit h AST M D1452

. SO P TAILIN G # 1 Geotechnica l

Investigatio n o f Tailin g Disposa l Area s Date : 07-30-91 Revisio n No

. 1. 0 Pag e 6 o f 1 7 22443E-22327/R14. A

07-30-9l/RPT/ 6I

f min e wast e o r soi l materia l come s u p int o the interio r o f the hollo w ste m augers , rotar y was h drillin g technique s o r othe r technique s wil l b e use d t o clea n th e materia l ou t
o f the auger s prio r t o sampling

. The interio r o f the hollo w ste m auger s wil l b e cleane d

out an d prepare d fo r samplin g usin g a rotar y bi t equippe d wit h baffle s t o deflec t th e 

### drillin g wate r upward

. Th e drillin g wate r shal l consis t o f clean
, potabl e water

. Wast e wate r wil l b e sprea d on th e surfac e o f th e tailin g pil e an d b e allowe d t o infiltrate

. N o wast e wate r runof f fro m th e tailin g pile s wil l b e allowed

. 5.3. 2 Rotar y Was h Drillin g Rotar y was h boring s wil l b e performe d i n accordanc e wit h AST M D2113

. I n silt y formation s whic h migh t b e disturbe d b y conventiona l sid e dischargin g choppin g bits
, the borin g wil l b e prepare d fo r split-barre l and thin-walle d tub e samplin g wit h a bi t equippe d wit h baffle s t o deflec t th e drillin g flui d upward

. Drillin g mu d o r temporar y casin g wil l b e provide d i f required t o maintai n a n ope n borin g an d wil l consist o f a mixture o f high-swellin g bentonit e an d water , o r Johnson' s "Revert " an d water , o r acceptabl e equa l an d wate r o f sufficien t viscosit y t o preven t infiltratio n o f drillin g flui d int o th e soi l durin g samplin g operations

. Temporar y casin g require d t o advance th e borin g i n eart h o r roc k wil l b e stee l pip e o f th e siz e required b y th e drillin g equipmen t an d ma y b e eithe r ne w o r use d material i n good condition

. 5.3. 3 Bedroc k Corin g Bedroc k corin g wil l begi n whe n penetratio n resistanc e t o th e split-barre l sample r exceed s 5 0 blow s i n a n interva l o f on e inc h o r less

. Roc k corin g wil l b e performe d i n accordanc e wit h AST M D2113

. Core barrel s wil l b e i n accordanc e wit h AST M D2113

, Sectio n 2.3.3 , double-tube
, swivel

type , M-desig n barrels
, o r thei r equivalent

. Eac h cor e barre l wil l includ e a cor e lifte r
S OP TAILIN G # 1 Geotechnica l

Investigatio n o f Tailin g Disposa l Area s Date : 07-30-9 1 Revisio n No

. 1. 0 Pag e 7 o f 1 7 22443E-22327/RH. A 07-30-91/RPT/ 6suitabl

e fo r catchin g and retainin g core s i n sof t formations

. Cor e barrel s wil l not excee d 1 0 fee t i n length

. Cor e bit s wil l b e i n accordanc e wit h AST M D2113

, Sectio n 2.3.4 , M-design

, or equivalen t bits

. Specia l car e wil l b e take n t o ensur e tha t maximu m recover y i s obtaine d o n eac h sectio n 

### o f core
. Core run s wil l b e limite d t o 5 fee t o r les s i f suc h limi t i s neede d t o assur e acceptabl e cor e recovery
. Run s o f 1 o r 2 fee t ma y b e require d t o obtai n acceptabl e cor e recover y i n sof t or broke n material

. Th e cor e wil l b e pulle d wheneve r necessar y t o preven t los s o r injur y t o th e core
. Grindin g o f th e cor e afte r th e cor e barre l ha s bee n blocke d wil l no t b e permitte d an d a blocke d cor e barre l wil l b e pulle d regardles s o f th e interval desired

. Roc k core s fro m eac h borin g wil l b e place d i n suitabl e boxe s i n accordanc e wit h AST M D2113

, Sectio n 2.3.9

. 5 . 4 SAMPLIN G PROCEDURE S

N Samplin g procedure s tha t ma y b e use d consis t o f split-barrel
, Californi a tube
, thin-walle d tube
, an d bul k sampling

. Th e procedure s fo r eac h samplin g metho d ar e provide d i n th e followin g sections

. 5.4. 1 Split-Barre l an d Californi a Tub e Samplin g Split-barre l and Californi a tub e sample s wil l b e obtaine d and th e resistanc e t o soi l penetratio n wil l b e measure d i n accordanc e wit h AST M D1586

. Penetratio n resistanc e (blo w counts ) for eac h 6-inc h incremen t wil l b e recorded

. Th e couplin g hea d fo r th e split-barre l sample r wil l b e provide d wit h a bal l chec k valv e an d wil l hav e ope n vents

. Wher e necessar y fo r sampl e recovery , th e sample r wil l als o b e equippe d wit h a spring-typ e retaine r o r a n equivalen t retainer

. Prio r t o collectin g
SO P TAILIN G # 1 Geotechnica l

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fo r chemica l an d geotechnica l analyses
, th e sample r wil l b e decontaminate d i n accordanc e wit h SOP No

. 1 fro m th e Ya k Tunne l SA P (Res-ASARC O 1990a)

. 

### Sampl e jar s fo r split-barre l sample s wil l b e wide-mouthe d jars

. Sampl e jar s wil l b e labele d accordin g t o SO P No

. 1 0 fro m th e Ya k Tunne l SA P (Res-ASARC O 1990a ) an d

a s describe d i n Tabl e 3.6

. 5.4. 2 Thin-Walle d Tub e Samplin g Thin-walle d tub e sample s wil l b e obtaine d usin g thin-walle d tube s and sample r i n accordanc e wit h AST M D1587

. The couplin g hea d o f the thin-walle d tub e sample r wil l b e provide d wit h a bal l chec k valve an d wil l hav e ope n vents

. Tube s wil l b e coate d wit h lacquer or suitabl e plastic

. Tube s wil l recove r a sampl e a t leas t 3 inche s i n diameter

. Tube s wil l b e furnishe d i n 36-inc h length s an d wil l eithe r b e constructe d o f seamles s steel tubes
, o r welde d sea m tube s provide d tha t weld s d o no t projec t a t th e seam
. Th e thin-walle d tube s wil l the n

» b e seale d b y sealin g th e en d o f th e soi l i n th e tub e wit h wax , providin g a space r for partia l recovery, an d tapin g a n airtigh t plasti c ca p ove r eac h en d o f th e tube

. A n Osterber g sample r ma y b e use d i f sampl e recover y i s difficult

. I f th e recover y o f a thin-walle d tub e sampl e i s les s tha n 12 inche s i n length
, a split-barre l sampl e wil l b e obtaine d fo r classification

. 5.4. 3 Bul k Sampling Bul k sample s wil l b e obtaine d fro m th e fac e o f th e excavatio n slope s i n th e tes t trenches
, o r b y removin g cutting s fro m the fligh t o f the auger s i n boreholes

. Sample s o f cutting s fo r bul k sample s wil l b e obtaine d b y advancin g th e auge r 2 feet
, the n withdrawin g th e auge r and removin g cutting s brough t t o th e groun d surfac e durin g auge r drilling

. Composit e bul k sample s wil l b e a minimu m o f 5 0 pounds

. The bul k sample s wil l als o includ e a representativ e sampl e place d i n moisture-proo f (plastic-lined ) bag s o r plasti c bucket s that ca n b e sealed

. S O P TAILIN G # 1 Geotechnica l

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### Sample s

fro m th e fac e o f th e excavatio n slope s wil l b e obtaine d b y usin g a shovel

. Sample s o f differen t materia l type s wil l b e obtained separately
, i n additio n t o a 

### composit e sampl e fro m th e fac e o f th e excavation

. 5. 5 WATE R LEVEL S 

### Unles s sit e condition s preven t it , boring s not complete d a s well s wil l b e lef t ope n fo r 4 8 hour s t o allo w th e groundwate r leve l t o stabilize

. Immediatel y afte r drillin g an d 4 8 hour s later
, th e water leve l wil l b e measure d t o 0.0 5 fee t usin g a n electronic wate r level measurin g device

. Boring s wil l the n b e backfille d usin g cement-bentonit e grout

. I f wate r i s presen t i n th e borings
, th e grou t wil l b e tremie d int o place

. I f substantia l cavin g i s likel y t o occu r i n th e boreholes
, groutin g wil l b e performe d 

### immediatel y afte r measurin g th e wate r leve l afte r completio n o f drilling

. Boring s complete d a s monitorin g well s wil l b e sample d a s specifie d i n the Ya k Tunne l S A P (Res-ASARCO

, 1990a)

. 5. 6 DOCUMENTATIO

N Documentatio n procedure s are a vita l aspec t o f an y geotechnica l investigation

. Eac h fiel d activit y mus t b e properl y documente d b y experience d personne l t o facilitat e timely
, accurate , reconstructio n o f event s i n th e field

. 5.6. 1 Fiel d Logboo k Th e mos t importan t aspec t o f documentatio n i s thorough
, accurat e recordkeeping

. Al l informatio n pertinen t t o th e geotechnica l investigatio n an d no t documente d o n th e tes t trenc h o r borin g lo g wil l b e recorde d i n a boun d logbook wit h consecutivel y numbere d 

### pages

. Al l entrie s i n logbook s wil l b e mad e i n waterproo f in k an d correction s wil l consis t o f line-out deletion s tha t ar e initiale d and dated

. Entrie s i n th e logbook wil l 

### includ e th e following
, a s applicable : SOP TAILIN G # 1 Geotechnica l

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Nam e and titl e o f author
, dat e and tim e o f entry , and physical / environmenta l condition s durin g fiel d activit y


### • Name s an d addresse s o f fiel d contact s

• Name s and responsibilitie s o f fiel d cre w member s

• Name s an d title s o f an y sit e visitor s

• Location

, descriptio n an d lo g o f photograph s (i f taken )

• Reference s fo r al l map s an d photograph s

• Informatio n concernin g samplin g changes
, schedulin g modifications
, an d change order s

• Informatio n concernin g drillin g decision s

• Fiel d observation s

• Decontaminatio n

procedure s

• Summar y o f dail y task s (includin g costs ) an d documentatio n o n an y cos t
o r scop e o f wor k change s require d b y fiel d condition s

• Signatur e an d dat e b y personne l responsibl e for observation s Fiel d investigatio n situation s var y widely

. N o genera l rule s ca n specif y th e exac t informatio n tha t mus t b e entere d i n a logboo k for a particula r site

. However

, th e logboo k wil l contai n sufficien t informatio n s o tha t th e samplin g activit y ca n b e reconstructe d withou t relyin g o n th e memor y o f fiel d personnel

. Th e logbook s wil l b e kep t i n th e fiel d tea m member' s possessio n o r i n a secur e plac e durin g th e investigation

. Followin g th e investigation , th e logbook s wil l becom e par t o f th e fina l projec t file

. SO P TAILIN G # 1 Geotechnica l

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Tes t Trenc h an d Borin g Log s Tes t trenc h and borin g log s wil l b e complete d for eac h tes t trenc h and borin g b y qualifie d personne l (geologist

, geologica l engineer , o r geotechnica l engineer)

. Tes t trenc h an d borin g log s wil l includ e th e followin g information :

• Trench/borin

g locatio n • Trench/borin

g identificatio n • Excavating/drillin

g agenc y • Excavating/drillin

g equipmen t and metho d • Dat e starte d an d complete d • Completio n depth/dimension s • Personne l performin g loggin g • Descriptio n o f lithologie s b y dept h includin g soi l o r roc k type , moistur e content , color
, an d Unifie d Soi l Classificatio n • Blo w count s (i f appropriate ) • Sample s collected
, intervals
, types , an d identificatio n numbe r • Recover y (i f coring ) • Othe r remark s o r observation s

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07-30-91/RPT/ 66. 0 LABORATOR Y TESTIN G Eac h typ e o f laborator y tes t wil l b e performe d a s specifie d i n th e laborator y tes t standard s presente d i n the followin g sections

. Sample s t o b e teste d wil l b e selecte d a t th e completio n o f th e drillin g program

. Th e followin g test s ma y be performed

. 6 . 1 MOISTUR E CONTEN T Moistur e content determinatio n wil l b e a s specifie d i n AST M D2216

. 6 . 2 ATTERBER G LIMIT S Atterber g limit s wil l b e a s specifie d i n AST M D4318

. Th e liquid limi t wil l b e determine d b y securin g th e result s o f a t leas t thre e trials

. 6 . 3 SPECIFI C GRAVIT Y Specifi c gravit y determinatio n wil l b e a s specifie d i n AST M D854

. 6 . 4 SIEV E ANALYSI S Siev e analysi s wil l b e a s specifie d i n AST M D422

, wit h sampl e preparatio n b y AST M D421

. 6 . 5 HYDROMETE R

ANALYSI S Hydromete r analysi s wil l b e a s specifie d i n AST M D422

, wit h sampl e preparatio n b y AST M D421

.

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COMPACTIO N Th e Standar d Procto r tes t wil l b e a s specifie d i n AST M D698

, an d th e Modifie d Procto r tes t wil l b e a s specifie d i n AST M D1557 : n o exceptions cited

. 6 . 7 UNCONFINE

D COMPRESSION Unconfine d compressio n test s o f cohesive soi l wil l b e a s specifie d i n AST M D2166

, an d th e unconfine d compressio n tes t on roc k core s wil l b e a s specifie d i n AST M D2938

. Th e unconfine d compressio n tes t o n cohesiv e soil s wil l b e performe d usin g controlle d strai n procedure

. The test repor t wil l includ e initial dr y uni t weight
, initia l moisture content , and a plo t
o f stres s versu s strain

. 6. 8 CONSOLIDATIO

N Consolidatio n test s wil l b e a s specifie d i n AST M D243 5 excep t a s specifie d herein

. Eac h consolidatio n tes t wil l includ e a reboun d an d reloa d cycle

. Whe n saturatio n o f th e specime n i s specifie d an d th e specime n begin s t o expand
, th e load shal l b e increase d a s require d t o hol d th e specime n a t it s origina l height

. Th e tes t repor t wil l includ e th e lo g o f tim e versu s deformatio n plo t an d a plo t o f voi d rati o versu s lo g o f pressur e curve
. Th e tes t wil l als o includ e initial sampl e thickness
, initia l moistur e content , dr y uni t 

### weight
, degre e o f saturation , specifi c gravity , an d initia l voi d ratio

. 6. 9 REMOLDE D SAMPL E 

### Remoldin g o f a sampl e wil l b e performe d fro m materia l obtained fro m a specifie d bul k sampl e o r thin-walle d tub e samples

. Th e sampl e wil l b e remolde d t o a specifie d dr y uni t weigh t an d moistur e content

. Th e materia l fo r th e remolde d sampl e wil l b e prepare d i n accordanc e wit h AST M D1632

. SO P TAILIN G # 1 Geotechnica l

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0 DENSIT Y DETERMINATIO

N The densit y determinatio n wil l determin e the dr y uni t weigh t a s define d and specifie d i n E M 1110-2-1906

. 6.1 1 SOI L RESISTIVIT Y Soi l resistivit y testin g wil l b e a s specifie d i n the Wenne r 4-pi n method

. 6.1 2 TRIAXIA L COMPRESSIO N 

### Th e consolidate d undraine d tes t wil l b e a s specifie d i n AST M D2850

. Th e consolidate d undraine d triaxia l tes t wil l b e a s specifie d i n E M 1110-2-1906

. Al l triaxia l compressio n test s wil l b e performe d o n a strai n controlle d procedure

. Th e confinin g pressur e wil l b e assigne d fo r eac h test

. Th e tes t repor t wil l includ e initia l dr y uni t weight
, initia l moistur e content , initia l degre e o f saturation , an d bac k pressure

. 6.1 3 TEST S FO R EXPANSIV E SOIL S Test s fo r expansiv e soil s wil l b e specifie d i n AST M ST P 479

. Tw o specimen s o f a specifie d sampl e wil l b e tested ; one sampl e b y the loade d and expande d tes t and the othe r b y th e expande d an d loade d test

. Th e repor t wil l includ e initia l dr y density
, moistur e content , degre e o f saturation , fina l wate r content , dr y density
, an d saturation

. Th e tes t repor t wil l includ e a plo t o f voi d rati o versu s lo g o f pressur e curves
. 6.1 4 TEST S FO R LEACHABL E METAL S Test s fo r leachabl e metal s ma y b e performe d o n tailin g an d min e wast e sample s t o evaluat e disposa l options

. Test s wil l b e analyze d usin g th e toxicit y characteristi c leachin g procedur e (TCLP ) as specifie d i n th e QAPP

. Sample s taken fo r TCL P wil l be shippe d

and handle d accordin g t o the procedure s specifie d i n SO P No

. 1 0 o f the Ya k Tunne l S O P TAILIN G # 1 Geotechnica l

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P (Res-ASARC O 1990a)

. Labelin g procedure s ar e specifie d i n Tabl e 3. 6 o f the Tailin g SAP

.

S OP TAILIN G # 1 Geotechnica l

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07-30-91/RPT/ 67. 0 REFERENCE S Res-ASARCO

. 1990a

. SampHn g an d Analysi s Plan

, Ya k Tunne l Operabl e Unit

, Californi a Gulch Site

, Leadville

, Colorado

. Prepare d b y Woodward-Clyd e Consultants

. April

, 1990

. Revised

, November

, 1990 , an d March

, 1991

. Res-ASARCO

. 1990b

. Sit e Healt h an d Safet y Plan

, Ya k Tunne l Operabl e Unit

, Californi a Gulc h Site

, Leadville

, Colorado

. Prepare d b y Woodward-Clyd e Consultants

. April

, 1990

.

SOP TAILIN G # 1 Geotechnica l

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. 2 Revisio n No

. 1. 0 Date : June

, 199 1 Page 1 o f 1 0
1. 0 TITL E PAG E
STANDAR D OPERATIN G PROCEDUR E TAILIN G NO

. 2 NEAR-SURFAC E TAILIN G SAMPL E COLLECTIO N Californi a Gulch Sit e 

### Leadville

, Colorad o Projec t Numbe r 22443 E Approvals : Date : Originato r Pee r Reviewe r QA/Q C Office r Projec t Manage r EP A Approva l S O P TAILIN G # 2 Near-Surfac e

Tailin g Sampl e Collectio n Date :

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2. 0 TABL E O F CONTENT S Sectio n 1. 0 TITL E PAG E 1 2. 0 TABL E O F CONTENT S 2 3. 0 PURPOS E AN D SCOP E 3 4 . 0 RESPONSIBILITIE

S AN D QUALIFICATION

S 4 5. 0 PROCEDURE

S 5 5 . 1 EQUIPMEN T LIS T 5 5. 2 PROCEDUR E

5 6. 0 SAMPLE

S 7 6 . 1 SAMPLE IDENTIFICATION

, LABELING

, AN D HANDLIN G 7 6. 2 QA/Q C SAMPLE S 7 6.2. 1 Fiel d Duplicate s 7 6.2. 2 Rinsat e Blank s 8 6.2. 3 Matri x Spike s an d Matri x Spik e Duplicate s 8 7. 0 DOCUMENTATIO

N 9 8. 0 REFERENCE

S 1 0

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3. 0 PURPOS E AN D SCOP E
Th e purpos e o f thi s document i s t o defin e th e standar d operatin g procedur e (SOP ) fo r collectin g tailin g sample s fro m th e surfac e t o u p t o 2 inche s belo w th e surfac e durin g th e Phas e I I Remedial Investigatio n a t th e Californi a Gulch Site

. Th e purpos e o f th e samplin g progra m i s t o obtai n sample s whic h mee t the objective s o f the investigatio n a s define d i n Subsectio n 3.1. 1 o f th e Samplin g an d Analysi s Plan

. Thi s procedur e i s intende d t o b e complet e enoug h s o tha t al l step s whic h coul d affec t tracking
, documentation
, o r integrit y o f sample s hav e bee n explaine d i n sufficien t detail that differen t samplin g personne l followin g thes e procedure s wil l delive r sample s t o th e laborator y whic h ar e equall y reliabl e and consistent

. Thi s procedur e give s description s o f equipment , fiel d procedures
, sampl e handling
, documentation
, an d fiel d qualit y assurance/qualit y contro l (QA/QC ) procedures 

### necessar y t o collec t near-surfac e tailin g sample s at the site

. Thi s procedur e i s t o b e strictl y followed

. An y modificatio n t o th e procedur e shal l b e approve d i n advanc e b y th e Projec t Manager

. Othe r SOP s wil l b e use d wit h thi s procedure
, including :

• SO P No

. 1 - Decontaminatio n

(Res-ASARC O 1990a ) • SO P No

. 1 0 - Sampl e Handling

, Documentation

,

an d Analysi s (Res-ASARC O 1990a ) • SO P Tailin g No

. 1 - Geotechnica l

Investigatio n o f Tailin g Disposa l Area s S O P TAILIN G # 2 Near-Surfac e

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4. 0 RESPONSIBILITIE S

AN D QUALIFICATION

S
T h e Projec t Manage r (PM ) i s responsibl e fo r assignin g projec t staf f t o collec t near
surfac e tailin g samples

. Th e P M i s als o responsibl e fo r assurin g tha t thi s an d an y othe r appropriat e procedure s ar e followe d b y al l projec t personnel

. T h e projec t staf f assigne d t o th e collectio n o f near-surfac e tailin g sample s ar e responsibl e fo r completin g thei r task s accordin g t o thi s an d othe r appropriat e procedures

. Al l staf f ar e responsibl e fo r reportin g deviation s fro m th e procedur e t o th e P M

, Sit e Manager

, o r Projec t QA/Q C Officer

. Onl y qualifie d personne l shal l b e allowe d t o perfor m thi s procedure

. Qualification s ma y b e base d o n previou s experienc e o r on-the-jo b trainin g an d supervisio n b y anothe r qualifie d person

.

S O P TAILIN G # 2 Near-Surfac e

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5. 0 PROCEDURE S

5 . 1 EQUIPMEN T LIS T

• Stainles s stee l trowel(s ) 

### • Stainles s stee l spoons an d horsehai r brushe s • Stainles s stee l mixin g bow l • Sampl e container s 

### • Sampl e label s • Ic e ches t (sampl e shuttle ) • Ice

, blu e ice , or othe r coolin g substanc e • Fiel d noteboo k an d locatio n ma p • Appropriat e healt h an d safet y equipmen t • - Appropriat e decontaminatio n

equipmen t
5. 2 PROCEDUR E Near-surfac e tailin g sample s wil l b e collecte d a s specifie d i n Subsectio n 2. 3 o f the Tailin g Wor k Plan

. Near-surfac e tailin g sample s ar e define d a s composit e sample s taken at depth s n o greate r than 2 inche s belo w th e surface

. Thi s sectio n describe s th e procedure s f o r collection
, labeling
, an d fiel d qualit y assuranc e fo r near-surfac e tailin g samples

. Th e appropriat e samplin g equipmen t fro m th e lis t i n Subsectio n 5. 1 shal l b e collecte d prio r t o proceedin g t o a samplin g location

. Th e appropriat e healt h an d safet y equipmen t
a s describe d i n the Healt h an d Safet y Pla n (Res-ASARC O 1990b ) shoul d b e donne d 

### befor e proceedin g t o th e samplin g location

. S O P TAILIN G # 2 Near-Surfac e

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, 199 1 Pag e 6 o f 1 0 Near-surfac e tailin g sample s wil l b e take n a t the location s and dept h specifie d i n Sectio n 2. 3 o f the Tailin g Wor k Plan

. Wher e obstructions preven t samplin g at the planne d location
, a ne w samplin g locatio n wil l b e establishe d a s nea r a s possibl e t o th e previou s location

.
• Advanc e th e hol e t o a dept h o f 2 inche s usin g a trowe l that ha s bee n decontaminated

. Plac e th e materia l collecte d fro m th e entir e specifie d samplin g interva l i n a decontaminate d stainles s stee l mixin g pan

. Spoon s an d brushe s ma y b e use d t o remov e a s muc h loos e materia l fro m th e hol e 

### a s possible

.
• Thoroughl y homogeniz e the sampl e an d plac e i t i n the appropriat e sampl e containers

. The container(s ) wil l b e labele d a s specifie d i n SO P No

. 10 , Sampl e Handling

, Documentation

, an d Analysi s (Res-ASARC O 1990a)

.
• Th e labele d sampl e container s shal l b e place d i n a n ice ches t wit h chain

of-custod y form s an d ic e fo r storag e unti l the y ar e delivere d t o th e analytica l laboratory

.
• Upo n completio n o f tailin g sampling
, th e tailin g remove d fro m th e hol e an d no t use d a s sampl e wil l b e use d t o backfil l th e hole

.
• Afte r eac h sampl e i s obtained
, al l equipmen t use d i n the samplin g process , includin g trowels
, spatulas
, an d bowl s wil l b e sen t t o th e decontaminatio n lin e fo r cleanin g prio r t o reuse
. Samplin g equipment decontaminatio n wil l b e complete d accordin g t o th e decontaminatio n procedure s specifie d i n SO P No

. 1 , Decontaminatio n (Res-ASARC O 1990a)

.
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6. 0 SAMPLE S

6 . 1 SAMPLE IDENTIFICATION

, LABELING

, AN D HANDLIN G Tailin g sample s wil l b e collecte d i n glas s jar s a s describe d i n Tabl e 3- 2 o f the Fiel d Samplin g Plan

. Al l sample s wil l hav e a labe l attache d whic h wil l b e fille d ou t usin g waterproo f in k a s describe d i n SO P No

. 1 0 (Res-ASARC O 1990a)

. Sampl e identificatio n number s wil l follo w th e convention s discusse d i n Table s 3-5 , 3-6 , an d 3- 7
o f th e Tailin g Work Plan

. Afte r collection
, sample s wil l b e handled
, shipped
, an d tracke d a s specifie d i n SO P No

. 1 0 (Res-ASARC O 1990a)

. A chain-of-custod y (COC ) for m shal l b e fille d ou t i n th e field
, an d thi s for m shal l accompan y ever y shipmen t o f sample s t o th e laboratory

. Th e chain-of-custod y procedur e i s specifie d i n SO P No

. 1 0 (Res-ASARC O 1990a)

. 6. 2 QA/Q C SAMPLE S Th e followin g QA/Q C sample s wil l be collected

. Th e numbe r o f sample s tha t wil l be collecte d i s specifie d below

. 6.2. 1 Fiel d Duplicate s Fiel d duplicate s ar e prepare d b y homogenizing
, o r mixing, a larg e portio n o f a sampl e an d placin g equall y representativ e sample s int o tw o set s o f containers

. Fiel d duplicate s wil l b e submitte d t o th e laborator y a s blin d samples

. Th e tru e identit y mus t b e thoroughl y documente d h i fiel d notes

. Thi s documentatio n i s no t submitte d t o th e S O P TAILIN G # 2 Near-Surfac e

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. I t i s highl y recommende d tha t "sensitive " sampl e locations b e selecte d fo r th e collectio n o f fiel d duplicates

. Blin d fiel d duplicate s wil l b e collecte d daily

. 6.2 2 Rinsat e Blank s Rinsat e blank s ar e ofte n referre d t o a s equipmen t blank s o r a s decontaminatio n procedur e blanks

. The y ar e collecte d t o chec k fo r sampl e contaminatio n cause d b y reus e o f decontaminate d samplin g equipmen t a s wel l a s th e samplin g proces s an d transportation

. On e rinsat e blan k wil l b e collecte d fo r eac h 2 0 samples
, o r daily
, whicheve r result s i n fewe r samples

. 6.2. 3 Matri x Spike s Matri x spike s (MS ) ar e fiel d sample s t o whic h a know n amoun t o f analyt e i s adde d b y the laborator y i n orde r t o asses s laborator y accuracy
. A n M S tailin g sampl e wil l consist
o f a n additiona l amoun t o f sampl e i n duplicat e bottleware

. A t leas t on e sampl e fo r matri x spik e analysi s (MS ) mus t b e submitte d fo r eac h 2 0 sample s collecte d o r ever y two days
, whicheve r come s first

. M S sample s mus t b e identifie d a s sample s fo r M S analysis

.

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7. 0 DOCUMENTATIO N
T h e fiel d documentatio n requirement s fo r th e fiel d sample r wil l includ e recordin g al l observation s mad e durin g samplin g o r decontaminatio n tha t coul d affec t th e qualit y o f

a sample

. Th e documentatio n fo r eac h sampl e shoul d b e entere d i n a fiel d noteboo k wit h consecutivel y numbere d pages

. Documentatio n shoul d includ e a t a minimum :

• Th e dat e o f sampl e collectio n • Tim e o f da y • Sampl e numbe r • Dept h o f sampl e • Typ e o f sampl e (e.g.

, soil
, QA/Q C sample ) • Samplin g metho d (e.g.

, auge r or trowel ) • Sampl e descriptio n • Unusua l samplin g condition s • A brie f descriptio n o f th e are a aroun d th e sampl e locatio n and th e weathe r condition s at the tim e o f sampl e collectio n I n addition
, eac h entr y (o r page ) i n the fiel d noteboo k shoul d b e date d and initiale d b y the individua l makin g the entry

.

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8.0 REFERENCE S Res-ASARCO

. 1990a

. Samplin g an d Analysi s Plan

, Ya k Tunne l Operabl e Unit

, Californi a Gulc h Site

, Leadville

, Colorado

. Prepare d b y Woodward-Clyd e 

### Consultants

. April

, 1990

. Revised

, November

, 1990 , and March

, 1991

. Res-ASARCO

. 1990b

. Sit e Healt h an d Safet y Plan

, Yak Tunne l Operabl e Unit

, Californi a Gulch Site

, Leadville

, Colorado

. Prepare d b y Woodward-Clyd e Consultants

. April

, 1990

.

S O P TAILIN G # 2 Near-Surfac e

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07-30-91/RPT/ 6