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.

The report follows Berkeley Lab's policy of using the International System of Units (SI), also known as the metric system of measurements. Whenever possible, results are also reported using the more conventional (non-SI) system of measurements, because the non-SI system is referenced by several current regulatory standards and is more familiar to some readers. Two tables are provided at the end of the Glossary to help readers: Table G-1 defines the prefixes used with SI units of measurement, and Table G-2 provides conversions to non-SI units. Years mentioned in this report refer to calendar years unless specified as fiscal year(s). Berkeley Lab's fiscal year (FY) is October 1 to September 30, and begins in the year previous to its name, i.e., FY 2010 was from October 1, 2009, to September 30, 2010. For ease of reference, a key to acronyms and abbreviations used in this report can be found directly after the text, at the end of Chapter 6. Following that is also a glossary for readers who may be unfamiliar with some of the terms used in this report.

Mature Bay Laurel (Laurus nobilis) trees behind Building 85.

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).

No abstract