### I. --~ 

# ~~~ ~ GLAMIS MARIGOLD MINING COMPANY P. O. Box 160 Valmy, NV 89438 Phone (775) 635-2317 Fax (775) 635-2551 

## RECEIVED

r-nvironmenfalProtection 

### NOV 0 1 2006 

### Nnv 0 ~ 2006 fNV!RONME~T,j.L PROTECTION
"APC / r't"""'" October 30, 2006 Mr. Rob Bamford Nevada Division ofEnvironmental Protection Bureau ofAir Pollution Control 901 South Stewart Street, Suite 4001 Carson City,Nevada 89701-5249 CertifiedMail Return Reciept RequestNo.: 7001 1140000363449807 Re: Glamis Marigold Mine QuestionnaireAddendum Dear Mr. Bamford: Glamis Marigold Mining Company, has preparedthe enclosedAddendum to the Glamis Marigold Mine Mercury Questionnaire receivedby the Bureau ofAir Pollution Control on March 22, 2006. The Addendum consists of a new annex forthe assay laboratory. Please appendthe new annex to the questionnaire. GMMC regrets the inadvertent omission ofthe assaylaboratoryfromthe originalmercuryquestionnaireresponse. Shouldyouhaveanyquestionsor require additional information, please do not hesitate to contact either Mr. Clay Postlethwaite of Enviroscientists, Inc. at (775) 826-8822 orme. Sincerely, 

# d:~er Environmental Superintendent JB:cp enclosures
cc: Mr. C. Postlethwaite, Enviroscientists, Inc., Reno, NV (without enclosures)

ISSOCQUESTIONNAIREADDENDUMLTRV1.DOC

### ANNEX 7. OTHER THERMAL PROCESS UNITS 1. Please provide an identification of other thermal process units, including a process description and the mechanism by which mercury emissions are released. (Note: iffacUity has more than 1 "other thermal process" process, copy this Annex 7 and complete a separate copyfor each such unit.) a. Description: Assav Laboratory. The Assay Laboratory conducts chemical 

### illillJyses ongeologicmateria~ sourcesincillQe twodryingovens.two cupellation furnaces. two hot plates. one bullion oven. one annealing oven and one atomic adsorption machine. All of the devices are ducted directly out of the building
or operate under exhaust hoods designedto capture the exhaust from the operation of these devices. 

### 2. An estimate ofthe actual mercury air emissionsreleased from such unit and the basis of such estimate, in accordance with the followinghierarchy ofdata:



## . Direct testing and measurement.



## . Based on engineering calculations that take into account the average mercury content of the ore processed, the amount of ore processed and the potential for mercury releases from the specific processes utilized to recover gold.



### Estimated mercury emissions from unit = 0.002 pounds for 2004 Basis of estimate: Total samples processed and average mercurv content of the samQles.
3. Circlethe code numbers for the type of airpollution control device and the type offume capture system used: APC device ID no.: Fume capture system: 0 None

Page 1 of 2 1 Fabric filter 2 Wet scrubber 3 Carbon adsorption unit 3 Other: 4 Other:Yes Lhnclose summary measurement data, including data on mercury speciation, if available, the test methods used, information on actual production or processing rates and on process conditions at the time the measurements were made, and a statement that any APC devices (if present) were operating normally during the test, "

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