1995-08-18_GENERAL DOCUMENTS - C1981041

Home Browse Search

topdressing layer will have an SAR<12 , and EC<8mhos, while the requirements for cover material below the top 6" are somewhat less stringent. The plan calls for sampling within borrow areas prior to excavation to define the limits of excavation and allow for proper placement of "topdressing" and "subsoil" . It is assumed that this procedure will also be followed in salvaging cover material from CRDA No. 3 prior to initiation of construction, but this is not specifically stated in the text. Please revise the narrative to include the plan for sampling and salvage of soil from the CRDA No. 3 disturbance area, and include measures which will be taken if necessary to allow for separate storage and handling of "topdressing" and "subsoil" quality cover material . 2 . 04 .10 , 2 .05.4(2) (e) 1 . Exhibits 6D through 12D depict various disturbed areas and delineate specific areas which would be compared to designated reference areas and established success standards. Although it is stated on Page 195c that the greasewood/shadscale and shadscale reference/study areas and density/diversity criteria would be used for determining revegetation success for CRDA No. 2 and No. 3 , the necessary maps delineating the specific portions of each disturbance area which would be compared to each reference area/success standard have not been provided. Appropriate maps should be submitted. 2 . Appendix TT describes the results of a threatened and endangered species survey conducted within the permit area during 1982 and 1983. The appendix indicates that two cactus species officially listed as threatened or endangered are potentially present in the permit area, but that neither species was observed during the field surveys. The areas which were surveyed in the field are described as "the three study areas and sites to be disturbed in the near future." The revision application for CRDA No. 2 and No. 3 was not submitted to the Division until the fall of 1984 , and it is not clear whether the CRDA No. 2 and No. 3 disturbance areas were included in the survey as "sites to be disturbed. . . " A more specific description of areas covered by the T&E field survey should be provided, and a plan for surveying any proposed disturbance areas not surveyed to date prior to additional disturbance should be submitted. 3 . We have identified the following concerns with specific aspects of the revegetation plan. a) The application includes two permanent seedmixes, Table 2 . 05.4 C "Greasewood/Shadscale Permanent Seed Mix" , and Table 2 . 05.4 d "Cameo Refuse Disposal Area Nos . 2 and 3 Permanent Seed Mix. " The Greasewood/Shadscale mix is rather lacking in diversity, and includes no forbs. Inclusion of this mix is somewhat confusing, because Refuse Areas 2 and 3 each include significant acreage which would be compared to the greasewood/shadscale success standards. It is also not clear what seedmix would be applied to