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8.A <br /> Page 98 <br /> � <br /> 1� � Walter Levison �� <br /> CONSULTING ARBORIST ' - -�. <br /> PNWISA Tree Risk Assessor #593 ASCA Re istered Consuldn Arborist #401 ISA CertiFied Arborist #WC-3172 <br /> 5. LEAF LITTER: <br /> Allow all existing leaf litter to remain under canopy dripline of oak #1. <br /> 6. WOOD CHIP MULCH: <br /> Purchase natural wood chips of good quality from a reputable landscape supply house such <br /> as Lyngso in Redwood City. Lay an even 6 inch thick mat of wood chips (not bark chips or <br /> shredded redwood bark) over the entire open soil root zone area to be protected by chain link <br /> fence around oak #1 and redwood #2. <br /> 7. IRRIGATION ! OAK AND REDWOOD: !F ' .'f ��''� _ �` <br /> Starting now, initiate 2X/month heavy ;� p i ��", <br /> irrigation over the open soil root zone area of +. � � <br /> oak #1 and 4X/month heavy irrigation around �� �����t <br /> redwood #2 using one or more of garden �. �� ;,�{,� .,_ ,_ <br /> hose, soaker hose, emitter line, and bubblers ' . ,.�• , � � : " ✓ =+� " � = ' <br /> �,..,• � � .•. �• J;: " . <br /> (see photo at right for example of Netafim '•i:•::fi'�"�`=� : - - - ; ��-•' � <br /> emitter line). Continue until the first heavy �^ :.;;;;r= ''� •�'�'~��.. j� � <br /> rains of winter. » - �,�,,,;,�..�: .�" '-''.:�',� ;'` <br /> �,�,",�rf,"�'�;. ;"' .��:�"�, <br /> Irrigation should be left on for approximately 3 ` � �~ � . <br /> z "'" - "' ..:. `, �,. �°':�r�wt <br /> to 5 hours, or until the uppermost 24 inches of ��`�� �: ' Y s"��f'.�_ _=-_ . <br /> the soil profile is thoroughly saturated on the neighbor's side of the tree. <br /> The soaker should be placed in a snaking formation (see photo above) over the entire root <br /> zone of redwood #2. <br /> The soaker should onlv be alaced at 15 feet out from the trunk of oak #1 <br /> The PA will check soil moisture levels using a Lincoln moisture probe to determine if irrigation <br /> needs to be adjusted. <br /> Irrigation will help boost tree vigor during site work and will help keep the trees vigorous. <br /> Good vigor assists the trees in fighting pests and diseases during periods of construction <br /> pressure. <br /> 8. CONCRETE DEMOLITION METHOD / PHASING / OAK #1 • <br /> Phase demolition of the buckled concrete sidewalk and driveway materials to the very end of <br /> the project, in order to maintain those materials in-situ as long as possible as a"soil buffer" to <br /> prevent desiccation of the root zone and/or machinery-caused compaction of the soil. <br /> Use only small tools to demolish the materials (e.g. jackhammer) without cutting down into <br /> existing soil grade where roots of oak #1 are likely present just beneath the slabs. <br /> 6of14 <br /> Site Address: 448 Saint Francis Version: 08272010 <br /> Walter Levison � All Rights Reserved <br /> Regislered Member, Amerlcan Society of Consulling Arborisls and Member of the Inlematio�al Sociery of Arbortculture <br /> Phone/Fax (650) 697-0990 <br />