Location of three sites where environmental investigations were carded out in 1991 .

as a supplemental appendix to Volume I, which contains the body of the report. Volume II contains the environmental monitoring and sampling data used to generate summary results of routine and nonroutine activities at the Laboratory (except for groundwater sampling data, which may be found in the reports referred to in Chapter 4). Volume I summarizes the results from analyses of the data. The results from sample collections are more comprehensive in Volume II than in Volume I: For completeness, all results from sample collections that began or ended in calendar year (CY) 2007 are included in this volume. However, the samples representing CY 2006 data have not been used in the summary results that are reported in Volume I. (For example, although ambient air samples collected on January 9, 2007, are presented in Volume II, they represent December 2006 data and are not included in Table 4-2 in Volume I.) When appropriate, sampling results are reported in both conventional and International System of Units (SI). For some results, the rounding procedure used in data reporting may result in apparent differences between the numbers reported in SI and conventional units. (For example, stack air tritium results reported as <1.5 Bq/m 3 are shown variously as <39 and <41 pCi/m 3. Both of these results are rounded correctly to two significant digits.

California Health and Safety Code §25100 et seq., 1972. Hazardous Waste Control Law (as amended). California Health and Safety Code §25280 et seq., 1983. Underground Storage of Hazardous Substances (as amended). California Health and Safety Code §25500 et seq., 1985. Hazardous Materials Release Response Plans and Inventory Law (as amended). California Health and Safety Code §44300 et seq., 1987. Air Toxics "Hot Spots" Information and Assessment Act (as amended).

California Health and Safety Code §25100 et seq., 1972. Hazardous Waste Control Law (as amended). California Health and Safety Code §25280 et seq., 1983. Underground Storage of Hazardous Substances (as amended). California Health and Safety Code §25500 et seq., 1985. Hazardous Materials Release Response Plans and Inventory Law (as amended). California Health and Safety Code §44300 et seq., 1987. Air Toxics "Hot Spots" Information and Assessment Act (as amended).

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