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Mr. Makdessi advised that the work completed by Terrasearch in conjunction with the r Kleinfelder report was performed in accordance with the State's 1997 guidelines for evaluating seismic hazards, and the analyses is far in excess of what is normally done. Discussion ensued regarding the margin of parameters and degree of analyses involved in determining whether it is appropriate to develop sites. Commissioner Roberts stated that she is concerned whether an adequate analysis of the groundwater monitoring has been done within the hillside area as stated as a mitigation measure. Mr. Makdessi advised that monitoring has been done over a period of years, while it needs to be continued. Ms. Kline advised that when the studies on the stability of the site were performed the Kleinfelder study used a coefficient for the groundwater level which would never exist in order to provide an additional factor of safety. Commissioner Roberts questioned the applicant conducting the monitoring. - Chairperson Sullivan asked if the groundwater monitoring had taken place. Mr. Madkessi advised that an updated mapping of the surface ditches was done in the last 1-1/2 to 2 years, and no significant changes were visible. Mr. Grubstick advised that additional monitoring will be taking place. He further advised that while these measures have been developed in response to comments on the SEIR, it is necessary to do some grading activity to see the real conditions in order to determine the extent of the mitigation measures necessary. Chairperson Sullivan noted that he is concerned about the mitigation measure requiring only one winter before grading in order to determine if there is a groundwater problem. Mr. Makdessi advised that there is groundwater information from 1992 to 1996 or 1997, and there are currently monitoring instruments on the site. THE PUBLIC HEARING WAS CLOSED Commissioner Roberts stated that she would like to discuss the removal of the setback line as a separate issue. Commissioner Arkin concurred. Chairperson Sullivan noted that this would be acceptable, but the Commission needs to recognize that if the line is eliminated it opens the opportunity for new PUD applications for the remainder of the property. Mr. Roush commented that in order to remove the setback line, staff is recommending that the mitigations stated in the SEIR be applied, therefore, it is difficult to separate the two issues. He noted that if there are inadequacies in the SEIR he would like the Planning Commission to identify those, and allow staff the opportunity to address those issues. He confirmed that the Planning Commission's recommendation would be forwarded to the City Council. Ms. Kline noted that if the Planning Commission removes the line and certifies the SEIR, this action puts in place very stringent mitigation measures which provide much higher standards which any future project would have to be reviewed against, rather than only a geotechnical setback line. Mr. Roush suggested that the Planning Commission could amplify or clarify the mitigation measures, such as requiring additional information regarding the groundwater monitoring requirements. ,.-. PLANNING COMMISSION MINUTES June 13,2001 Page 6