HomeMy WebLinkAbout13- (missing pgs) Task Order 2 for Soil Gas Study/Bozeman Sanitary Landfill TASK ORDER
DECEMBER 2013 AND JUNE 2014 ASSESSMENT' MONITORING
AND OTHER SERVICES
BOZEMAN LANDFILL
November 20, 2013
CLIENT: CONSULTANT:
The City of Bozeman Tetra Tech, Inc.
P.O. Box 1230 851 Bridger Drive, Ste 6
Bozeman, Montana 59711-1230 Ana a MT 59715
Attention: Mr. Dustin Johnson Attention: Mr. Mark F. Pearson
SCOPE OF SERVICES:
Groundwater Monitoring: Two 'Assessment' groundwater monitoring events will be scheduled.
These will be conducted in December 2013 and June 2014. Tetra Tech will perform groundwater
monitoring in accordance with Tetra Tech's Groundwater Monitoring Sampling Analysis Plan
(September 17, 2010) for the landfill. Groundwater monitoring will be conducted in existing
groundwater monitoring wells or stations and include the following: LF-2, LF-3, MW-3, MW-4,
MW-5, MW-6, MW-6B, MW-7A, MW-7B, MW-8A, MW-813, MW-8C, MW-9A, MW-9B, MW-10,
MW-11, MW-12, MW-13, MW-14, MW-15, and MW-16, Mcllhaftan Seep, and Valley View
(formerly Mcllhaftan) Veterinary Clinic well. Therefore, this task order assumes that 23
wells/stations will be monitored and sampled. A sampling and analysis matrix is presented in
Tables 1 and 2 of Attachment A contained in this task order. The groundwater and air monitoring
services being conducted as part of the Soil Gas Study will be integrated into this monitoring
program as warranted during 2014. How data and reports from these two studies will be
combined will be determined at a later date.
December 2013 Assessment Monitoring
Field parameter monitoring and collection of water samples will be conducted in 20 monitoring
wells as shown in Table 1. Water levels will be measured in all monitoring wells at the site prior
to purging the wells for purging and sampling. Field parameters including temperature, pH, and
specific conductivity will be measured at all stations where water samples will be collected. Field
parameters will be measured during and at the conclusion of purging the wells.
For the purposes of this task order, the purchase of a dedicated pump is included in the event of
breakdown of one of the dedicated well purging/sampling pumps. Water samples collected will be
analyzed by Pace Analytical Laboratories (in Billings, Montana) for many of the constituents listed
in Appendix 1, 40 CFR Part 258 (July 1, 2008) in ARM 17.50.1306. DEQ approved a decrease in
the number of metals analyzed and the frequency of monitoring in some of the wells (DEQ
correspondence to City of Bozeman dated January 14, 2013) and Table 1 reflects this. Therefore,
samples collected from eight wells will be submitted for the "Full List" of metals (15 metals). Well
samples where only volatile organic compounds (VOCs) and nitrate + nitrite as N would be
analyzed are also indicated in Table 1.
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