AgdaPkt 2007-04-09 - Laserfiche WebLink

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__--- ---- ____.. . . _... _.._..__-----...-----.-._.._._ __._._,,._ ._._...�,_.__.__..w�_..,.,,...,_._..._.__........._.....__.._.:...9�,.. Page 66. ' Propnseri Developrnent at 21 Horgan Avenue/885 Woodside Rd., Redwood City, CA (330139} Apri12,2007 _ Page 2 Waste Mana�ement Flan , GPP staff approve the waste management plan with the following conditions: • Schedule the date and time of the drillin�;:of the soldier bean�borings and the excavation of soils>J 0 fbg with GPP.staff at least three business days in advance of the wark; • Periodically record pfiotoionization detector {PID) readings along the eastern property � line during tl�e drilling of tl�e soldier beam bozin�s and when excavating soils >10 fbg. Cease work if PID readings along the eastern property line exceed 100 parts per million (work can be resumed if engineering coi�trols reduce the`P�D readings along this , boundary to<50 parts ger million); . _ • Mininnize the generatian of dust; especially from soils excavated >l0 �bg, and analyze stackpiled soil in accordance with the receiving faciliries requireinents; a Notify GPP staff if hydrocarbons a�'e encountered during site excavation activities; ' • Do not generate runoff when wettirig soil stockpiles unless the runoff will be contained � ; and properly disposed; and • Backfil� the soldier �eam.bortngs �vith. Portland eeznent. grout when the shoring is j removed ta inhibit potential vertical migration of hydrocarbori-affected groundwater. . � Closin�Cornments Does Nichoison Larnb Venture plan to install capped piping under ihe basement slab to all�w potez�tial future conveyancc of vapor and/or groundwater to $95 Woodside Road? Such action should be cbnsidered and coordinated with the Responsible ;Party (RP) of the 845 Woodside Road site in case the RP aemonstrates extraction beneath the basement slab is necessary to reach -- remec�ial objec�ives A-tracer wire--siiauld�b�-in�'Ca�Ye�t�'�n-�his piping to-#acilitate-fii�i"zie loca"tian (do not stub the pipes up fihrough the basement slab). �t appears these pipes sliould. trend � perpendicular to the property line contacting 895 Woodside Road. In addition,it appears three to five, sets of piping are necessary (e.g. perhaps approximateJy 35 and 80 feet northeast of the elevator pit and approximately 65 feet soutlieast af the existing sidewalk along Woodside Road for a 3 set desig�). However, final desigri must be justified.by a State Registered Geologist and Civil Engineer experienced in environmental remediation matters.