Intended for use by NDEE's pre-qualified Pay for
Performance Contractors.
Potential bidding Contractors should not contact
the State Contractor that performed the Tier 1
& 2 with questions about the site.
Those types of
questions should be addressed to Phil Hargis at
(402) 471-3150 or Email at Phil.Hargis@Nebraska.Gov.
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| Date: |
2/16/07 |
| Site Name: |
American Charter |
| UG# |
091492-NM-1315 |
| Address: |
2221 23rd Ave. |
| County: |
Platte |
| Closest Town |
Columbus |
| Legal Description: |
NE, NW, NE Sect. 19, T17N, R01E |
| Contractor Performing Assessment: |
Terracon |
| Tier 1 Date: |
9/25/02 |
| Tier 2 Date: |
6/29/06 |
| Property Owner’s Name: |
Pete Alvestad |
| Property Owner’s Phone Number: |
402-348-6554 |
| Contamination Types: |
Gasoline, Diesel |
| PFP Bid Number: |
NE-021 |
| Posting Date: |
2/16/07 |
| Closing Date for requesting clarifications from the NDEE: |
5/25/07 |
| Clarifications to relevant qustions will be issued by the NDEE by: |
6/1/07 |
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| Bid Submittal Deadline 6/15/07 at 2:00 pm central time. |
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Site Summary:
The American Charter site sits in the Platte Valley on the north side of the City of Columbus. The geology of the site includes Quaternary alluvial sediments consisting of sand, silt and clay with groundwater at about 12 to 16 feet below ground and flowing southeast. NDEQ activated this site in late 2001 to begin the Tier 1 investigation process. During the Tier 1 drilling, free product (FP) was discovered and NDEQ directed that Terracon define the FP and the dissolved areas of contamination. During the same time an RP lead site (Nite & Day) on the northwest corner of the intersection was progressing through the Tier process, and an SVE/AS remedial system was installed and became operational in 2003. At this time, all FP at the Nite & Day facility has been remediated, and the site is approaching its dissolved SSTLs. It is unknown with certainty if the two plumes are commingled under American Charter; however some off site contamination migration is a possibility, and the PFP Contractor should be aware of these issues. NDEQ believes that any off site contamination should not delay the cleanup, if the system is designed for this possibility. |
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Table 1. Final Tier 2 Sampling Results:
| Benzene | Toluene | Ethylbenzene | Xylenes | n-Hexane | MTBE | Naphthalene | Diesel | Total Concentration |
MW-1 | 15 | FP | FP | FP | FP | FP | FP | FP | FP |
MW-3 | 15 | FP | FP | FP | FP | FP | FP | FP | FP |
MW-4 | 15 | FP | FP | FP | FP | FP | FP | FP | FP |
MW-7 | 15 | FP | FP | FP | FP | FP | FP | FP | FP |
Plume Total Concentration | 60 | Unknown | Unknown | Unknown | Unknown | Unknown | Unknown | Unknown | Unknown |
Plume SSTL Concentration | 3.938 | Not Over | Not Over | Not Over | Not Over | Not Over | Not Over | Not Over | Not Over |
Plume Initial Concentration above SSTLs | 56.062 | Not Over | Not Over | Not Over | Not Over | Not Over | Not Over | Not Over | Not Over |
MW-2* | .004 | .002 | .003 | .011 | ND | ND | ND | ND | .020 |
MW-5* | .201 | .129 | .418 | 1.000 | .102 | ND | ND | .608 | 2.458 |
MW-6* | .457 | .231 | .596 | 1.350 | .186 | .052 | ND | .998 | 3.870 |
MW-8* | ND | ND | ND | ND | ND | ND | ND | ND | ND |
MW-9* | ND | ND | ND | ND | ND | ND | ND | ND | ND |
MW10* | ND | ND | ND | ND | ND | ND | ND | ND | ND |
MW-11* | ND | ND | ND | ND | ND | ND | ND | ND | ND |
MW-12* | .003 | .002 | .002 | .008 | .001 | ND | ND | ND | .016 |
As with previous sites, wells with free product have an assumed dissolved Benzene concentration that will be used for interim payments once the free product is removed. In this case, the assumed level is 15 mg/l.
Units in mg/l, sampled on 5/17/06.
* These monitor wells are at or below detection limits, or calculated SSTLs.
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Table 2. SSTLs:
| Benzene | Toluene | Ethylbenzene | Xylenes | n-Hexane | MTBE | Naphthalene | Diesel |
MW-1 | .683 | >SOL | >SOL | >SOL | >SOL | 2.578 | >SOL | 1210.000 |
MW-3 | .683 | >SOL | >SOL | >SOL | >SOL | 2.578 | >SOL | 1210.000 |
MW-4 | 1.730 | >SOL | >SOL | >SOL | >SOL | 6.506 | >SOL | 3041.000 |
MW-7 | .842 | >SOL | >SOL | >SOL | >SOL | 3.174 | >SOL | 1489.000 |
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MW-2* | .262 | 400.000 | 57.659 | >SOL | >SOL | .994 | 26.507 | 468.000 |
MW-5* | .535 | >SOL | 121.000 | >SOL | >SOL | 2.021 | >SOL | 949.000 |
MW-6* | .757 | >SOL | >SOL | >SOL | >SOL | 2.857 | >SOL | 1341.000 |
MW-8* | .093 | 108.000 | 19.393 | >SOL | >SOL | .356 | 5.901 | 169.000 |
MW-9* | .093 | 108.000 | 19.393 | >SOL | >SOL | .356 | 5.901 | 169.000 |
MW-10* | .093 | 108.000 | 19.393 | >SOL | >SOL | .356 | 5.901 | 169.000 |
MW-11* | .069 | 71.358 | 13.975 | >SOL | >SOL | .263 | 3.641 | 125.000 |
MW-12* | .427 | >SOL | 95.630 | >SOL | >SOL | 1.614 | >SOL | 759.000 |
Units in mg/l
* These monitor wells are at or below detection limits or calculated SSTLs
WELL | Thickness of Free Product in Feet |
MW-1 | .99 |
MW-3 | .70 |
MW-4 | .20 |
MW-7 | .47 |
Measured 11/7/06 |
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Pictures:
(See attached file: Amer Charter Photo Legend.pdf)
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| MAPS: |
Area
(See attached file: Amer Chart survey map.pdf)
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Benzene Contour
(See attached file: Amer Chart benzene map.pdf) |
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Site Specifications:
1. American Charter leases this building from the owner listed above. The property owner wants to be notified for site visits, so please give him a call before making the trip to see the site.
2. As with previous sites, NDEQ will split the total bid price 70/30 for the two parts of the Contract. The Contract language will be the same as usual except that 30% of the award amount will be applied to the Free Product portion of the Contract and 70% to the dissolved part of the Contract. NDEQ will simply be incorporating both parts under one Contract, and the PFP Contractor will still have incremental cleanup goals for both parts as before. The PFP Contractor will also have complete freedom to work on both parts of the cleanup at the same time or one part of the Contract as he/she deems necessary.
2. From the photos you can see that the entire area is concrete paved or is planted in grass.
4. For bidding purposes, this site will have one "total cost" and one "time to cleanup" bid for the entire project.
5. The monitoring period for this Contract is one year.
6. As you can see, there is not a lot of room to work at this site, and that will mean some amount of inconvenience for the bank during the system install. Mr. Alvestad, the building owner, is aware of this and will help you work out installation issues with the bank. DEQ has found him to be very helpful while working through the investigative phase. Mr. Alvestad will want to discuss the system blueprints before it goes in. |
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Site Questions and Answers:
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