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Page 82 upon completion of activity within the oak's vicinity. Site workers shall be advised of the sensitivity of on-site oaks to disturbance. (c) Where avoidance of a valley oak(s)as specified above is determined infeasible,the project proponent shall replace each oak as required by the County's Natural Resources Regulations: three oaks shall be planted in appropriate locations for each oak removed. Replacement trees shall F' be the same species as the removed trees. Replacement trees shall be planted on the site in ,' association with the Wetland Mitigation and Monitoring Plan described under Mitigation Measures F.I(b). {d} To ensure i the success of mitigation,planted and retained trees shall be monitored for a period of five years following initial disturbance within the vicinity of a retained tree or following planting Of a replacement trec. If,during the course of monitoring,a significant decline in the health of planted or retained trees is identified by a qualified arborist,the tree shall be replaced as described under(c), Successful implementation of proposed and suggested mitigation measures would reduce potential impacts to on-site oaks to less than significant levels(avoidance of oaks and replacement of unavoidable oaks,coupled with monitoring and maintenance of mitigation lands,is consistent with San Joaquin County's General Plan 2010). Impact F.3.Implementation of the proposed project would,over the approximately 40-year project life,displace 83 acres of high quality foraging habitat(Brocchini property alfalfa field)and 136 acres of moderate quality foraging habitat(CYA and triangular properties)within a 10-mile radius Of multiple State-listed Swainson's hawk nest sites(219 acre total),and would contribute to the cumulative loss of potential Swainson's hawk foraging habitat in San Joaquin County. In addition to providing potential nesting sites(see Impact F.4,below.),the site supports plant communities conductive to the foraging habitats of the Swainson's hawk and is located within a I0-mile F. radius of multiple Swainson's hawk nest sites. The site has also been repeatedly observed to be used as foraging habitat by the Swainson's hawk. Consequently,the CDFG considers the site to provide foraging habitat for this species(City of Stockton 1994). The loss of essential foraging habitat(as defined by the CDFG)for the State-listed Swainson's hawk is considered a significant impact under the State CEQA l Guidelines(i.e.,the impact would substantially reduce habitat for a special status animal species). CDFG also considers the loss of foraging habitat"necessary to maintain the reproductive effort"to be a violation of the take provision of the California Endangered Species Act which would require a formal agreement with CDFG to allow anticipated take(Section 2081 of the California Fish and Game Code). Based on the CDFG's mitigation guidelines,removal of potential foraging habitat within a one mile l F radius of a nest site would require one acre of habitat maintained and managed for the Swainson's hawk for each acre lost to development(City of Stockton 1994)). Removal of potential foraging habitat outside ' the one mile radius,but within a five mile radius of an active Swainson's hawk nest would require 0.75 acre of habitat maintained and managed for the Swainson's hawk for each acre lost to development. Removal oftential foraging l� g� g habitat outside the five mile radius but within a 10 mile radius of an active Swainson's hawk nest would require 0.50 acre of habitat maintained and managed for the Swainson's }F1 hawk for each acre of lost to development. Please refer to Appendix F of the 1994 EIR,which contains the current CDFG Region 2 mitigation guidelines for the Swainson's hawk. e GRA.SSETTI ENVIRONMENTAL CONSULTING