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254     SOLID WASTE CHARACTERIZATION BY BUSINESS ACTIVITIES





                   TABLE 15.5     COMPOSITION OF THE 22 SELECTED WASTE GROUPS (CLUSTERS)

                                                             NUMBER OF       NUMBER OF
                        NAMES OF THE                         SIC CODES       COMPANIES
                   NO. 22 WASTE GROUPS                       INCLUDED        INCLUDED       ABBREVIATION

                    1   Agriculture                           3              13             ARG

                    2   Automotive sales, service,            3              27             AUT
                        and repair
                    3   Chemical and rubber                   3              16             CHM
                        manufacturers
                    4   Commercial and government            20             124             GOV

                    5   Construction                          3              21             CON
                    6   Education                             1                8            EDU

                    7   Electronic manufacturers              4              32             ELM
                    8   Food manufacturers                    1                8            FDM

                    9   Food stores                           1                9            FDS

                   10   Forestry                              1                3            FOR
                   11   Hotels                                1                7            HTL
                   12   Medical services                      1              14             MED

                   13   Metal manufacturers                   2              10             MLM

                   14   Mining                                2                6            MIN
                   15   Motor freight and warehousing         1                5            TRN

                   16   Paper manufacturers and printers      2              14             PPM
                   17   Recreation and museums                3              14             REC

                   18   Restaurants                           1              13             RST
                   19   Retail and wholesale trade            7              53             RTL

                   20   Textile and fabric manufacturers      2              13             FBM
                   21   Transportation equipment              1              14             TRM
                        manufacturers

                   22   Wood and lumber manufacturers         2              14             WDM
                        Totals                               65             438




                    Table 15.6 displays the SIC code groups that were clustered from this analysis. As
                 shown in the table, some groups did not cluster with other SIC codes. Based upon
                 mean composition percentages and standard deviations these groups could not be sta-
                 tistically associated with others and were treated as individuals. A review of the Waste
                 Groups indicated a logical grouping. For example, the three agricultural SIC code
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