Estimating the percentage of new resident employees is common in 

 environmental studies of OCS development. Selected examples are shown in 

 Table 2. As the table suggests, the estimated percentages of new-resident 

 employees can vary widely from place to place and from time to time. 

 Indeed, different studies of the same lease may include different estimates 

 as shown in Example 5. 



Table 2. Percentages of New-Resident and Other Employees 

 During Successive Phases of Field Development, as Estimated 

 in Selected Studies (Source: Modified from Reference 5) 



Study 



Exploration Development Production 



Phase Phase Phase 



New 1 Others^ New Others New Others 



0/ 0/ 0/ 0/ 0/ 0/ 



lo lo lo h lo lo 



1. BLM: Final Environmental 85 15 35 65 20 80 

 Statement on OCS Sale 35, 



(Volume 2, p. 365) 



2. Industry Input-California; 31 69 39 61 12 88 

 Western Oil and Gas 



Association Offshore 

 Operations Committee, 

 10-75. (Unpublished) 



3. Industry Input - Mid Atlantic; 38 62 57 43 6 94 

 Gulf Offshore Operations 



Committee, 1-75. 

 (Unpublished) 



x New resident employees 



2 A11 others (including employees who already live in the region and those 

 who continue to live elsewhere). 



2.3.6 Families 



Some of the new resident employees will bring families into the 

 region being studied. In forecasting community effects, it is important to 

 estimate the number and size of new resident families , since they will 

 enlarge and diversify the population under study. Some studies estimate the 

 number of households— including one-person households—instead of estimating 

 numbers of families. Because of the varied presentation of family or 

 household data, it is important to determine the precise definition of 

 terms. 



21 



