**National Stored Vehicle Tare Study 2005 to 2006**

**Results as of December 15, 2005**

-   3 States have reported data on 316 Stored Vehicle Tares from 31
    locations.

    -   The median number of trucks weighed each day at these locations
        was 137 (Range 70 to 550).

    -   The median number of weighments made using stored tare values
        was 95% (Range 40 % to 100 %).

    -   The median cost per-ton of the commodities weighed on scales at
        these locations was \$37.50 (Range \$5 to \$62).

    -   32 Vehicle Scales were tested

        -   23 (or 71 %) passed NIST HB 44 requirements.

        -   Significant errors in stored tare values were found
            regardless of whether or not the scale passed or failed a
            test.

        -   At locations where weigh-in and weigh-out scales were tested
            the differences at the same test load between the two scales
            were 340, 120, 20 and 100 lbs.

    -   The frequency of reweighing varied widely at the locations
        visited: daily, every-other-day, weekly, bi-weekly, monthly,
        every 90-days, every 6-months, annually, or only on request.

-   Industries surveyed: waste disposal, recycling, agricultural and
    aggregate.

-   Numbers

    -   Of the 316 tares verified

        -   254 (or 81%) were found to exceed +/- 0.2 %

        -   62 (or19%) were within +/- 0.2 %

        -   157 (or 49%) were negative errors (which favor the seller in
            some transactions)

        -   the errors in 71 (or 22%) were found to be more than 10
            times the allowable error of +/- 0.2 %

        -   the errors in 29 (or 9%) were found to be more than 20 times
            the allowable error of +/- 0.2 %

        -   several other errors were more than 50 to 127 times the
            allowable error of +/- 0.2 %

        -   Median Error -60 lbs (Range of errors 0 to -9500 lbs)

-   Participating States

    -   California

    -   Indiana

    -   Kansas

    -   Maine

    -   Maryland

    -   Michigan

    -   Nevada

    -   New Mexico

    -   Ohio

    -   West Virginia

Keys to Column Headings and Data Entries

[Tare Survey Code]{.underline}

1.  Count: indicates the number of a stored tare value which was
    verified.

2.  Location: indicates the number of the location where store tare
    values were verified.

3.  State: Michigan = 1

> Maryland = 2\
> California = 3

4.  Month

5.  Year

6.  Business Type:\
    Quarry/Aggregate = 1\
    Landfill/Solid Waste = 2\
    Mining = 3\
    Asphalt = 4\
    Recycler = 5\
    Agricultural = 6\
    Chemical = 7

7.  Frequency of Reweighing\
    Daily = 1\
    Every Other Day = 2\
    Weekly = 3\
    Bi-Weekly = 4\
    Monthly = 5\
    Every 90 Days = 6\
    Every 6 months = 7\
    Annually = 8\
    Only on Request = 9\
    Weigh-in & Weigh-Out = 10\
    At the start of the Season (agricultural -- tomatoes) = 11

8.  Scale Use\
    Buying = 1\
    Selling = 2\
    Buying and Selling = 3\
    Service

9.  Type of Commodity\
    Waste Disposal/Recycling = 1\
    Aggregate = 2\
    Agricultural (tomatoes) = 3

10. Truck Type\
    Dump Truck = 1\
    Tractor-Trailer = 2\
    Compactor = 3\
    Roll-Off Box = 4\
    Pick-Up/Flat Bed Truck = 5\
    Truck-Tractor = 6

[Scales]{.underline}

Pass = 1

Fail = 2