Kielty Arborist Services LLC P.O. Box 6187 San Mateo, CA

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1 Kielty Arborist Services LLC P.O. Box 6187 San Mateo, CA January 15, 2016 California Water Service Attn: Ms. Selma Vukolic 1278 Redcliff Drive San Jose, CA Site: California Water Corporation Yard, 341 North Delaware Street, San Mateo, CA Dear Ms. Vukolic, As requested on Monday, January 25, 2016, I visited the above site for the purpose of inspecting and commenting on the significant trees (trees over 6 inches in diameter at 48 inches above ground level). New construction is planned for this location and as required by the City of San Mateo a tree survey, a landscape unit work sheet and a tree protection plan will be included. Method: The significant trees on this site were located on a map provided by me. Each tree was given an identification number. This number was inscribed on a metal foil tag and nailed to the trees at eye level. The trees were then measured for diameter at 48 inches above ground level (DBH or diameter at breast height). Each tree was assigned a condition rating from 1 to 100 representing form and vitality using the following scale; 1-29 Very Poor Poor Fair Good Excellent The height of each tree was estimated and the spread was paced off. Lastly, a comments section is provided. Summary: In general, the trees at this location are in fair condition. Poor maintenance practices in the past, including toppings, has resulted in several of the trees having poor form. Topping trees will often cause them to grow with multiple leaders with poor crotches. The trees also tend to loose their apical dominance. The black pine has survived a bark beetle infestation and has improved its condition rating. Several of the camphor trees are in decline. The decline is caused by a fungal disease known as verticillium wilt. This pathogen often destroys the vascular system of the tree. The disease is usually not fatal but will leave the

2 California Water Corporation Yard January 15, 2016 tree in decline and disfigured. Despite year of drought the vigor of the trees has not had a significant decline. Landscape Unit Worksheet The City of San Mateo requires construction sites of this nature to submit a landscape units value for each tree over 6 inches in diameter to determine replacement value for trees that may need to be removed. The landscape unit is a calculation which assigns a numerical value to each tree. Factors used in calculating the landscape unit include: Diameter of each tree at 48 inches above ground level. Species value of each tree. Condition rating of each tree. Location rating of each tree. Identify if the tree is in the buildable area. Identify heritage trees. The builder or developer is required to install replacement trees according to the LU (Landscape Unit) Value of the trees they intend to remove. LU value for replacement trees are as follows: LU Value Replacement tree size 1 15 gallon 2 24 inch box 3 36 inch box 4 48 inch box Tree Protection Plan: Tree protection zones should be established and maintained throughout the entire length of the project. Fencing for protection zones should be 6 foot tall metal chain link supported by metal poles pounded into the ground. The location for protective fencing should be as close to the dripline as possible, still allowing room for construction to safely continue. Entire sections of the property can be fenced off providing maximum protection to groups of trees. No equipment or materials should be stored or cleaned inside protection zones. Any roots to be cut should be monitored and documented. Large roots or large masses of roots to be cut should be inspected by the site arborist. The site arborist may recommend irrigation or fertilizing at that time. Cut all roots clean with a saw or loppers. Roots to be left exposed for a period of time should be covered with layers of burlap and kept moist. Trenching for irrigation, electrical, drainage or any other reason, should be hand dug when beneath the dripline of desired trees. Hand digging and careful placement of pipes below or beside protected roots will dramatically reduce root loss, thus reducing trauma to desired trees. Trenches should be back filled as soon as possible using native materials and compacted to near original levels. Trenches to be left open with exposed roots shall KIELTY ARBORIST SERVICES P.O.Box 6187, San Mateo, CA TEL (650) FAX (650) Kkarbor0476@yahoo.com - 2 -

3 California Water Corporation Yard January 15, 2016 be covered with burlap and kept moist. Plywood laid over the trench will help to protect roots below. Normal irrigation should be maintained throughout the entire length of the project. All of the trees will need regular warm season irrigation. Irrigation should consist of surface flooding, with enough water to wet the entire root zone. This type of irrigation should be carried out two times per month during the warm dry season. Irrigation prior to the start of construction will improve the trees vigor and will reduce trauma from root loss. The spreading of 3 to 6 inches of wood chips will help the soil to retain moisture and will improve the soil structure. The installation of chips will also help to reduce compaction of the root zones and should be spread were compaction is expected to be heavy. This information should be kept on site at all times. The information included in this report is believed to be true and based on sound arboricultural principles and practices. Sincerely, Kevin R. Kielty Certified Arborist WE#0476A KIELTY ARBORIST SERVICES P.O.Box 6187, San Mateo, CA TEL (650) FAX (650) Kkarbor0476@yahoo.com - 3 -

4 Tree Survey Kevin R. Kielty Certified Arborist Site: California Water Department, Deleware Street, San Mateo, CA Tree # Species Nursery Group DBH (inches) Trunk Area (TA) Replacement Trunk Area (TA R ) TA incr (= TA - TA R ) Basic Tree Cost ( = TA incr x Unit Tree Cost ) Condition Location Species Rating Unit Tree Cost 1 Monterey pine $5,013 50% 60% 30% $451 2 Deodar cedar $88,215 50% 80% 90% $31,757 3 Redwood $61,381 50% 80% 90% $22,097 4 Redwood $44,154 50% 80% 90% $15,896 5 Redwood $127,803 55% 80% 90% $50,610 6 Redwood $165,983 40% 80% 90% $47,803 7 Redwood $109,002 55% 80% 90% $43,165 8 Deodar cedar $21,213 65% 80% 90% $9,928 9 Redwood $171,366 55% 80% 90% $67, Ginkgo $10,467 50% 80% 70% $2, Ginkgo $1,995 60% 80% 70% $ Coast live oak $2,539 50% 80% 90% $ Deodar cedar $88,215 60% 80% 90% $38, Deodar cedar $18,977 60% 80% 90% $8, Deodar cedar $73,224 55% 80% 90% $28, Redwood $44,154 45% 80% 90% $14, Douglas fir $6,233 25% 80% 70% $ Redwood $51,111 60% 80% 90% $22, Redwood $58,731 65% 80% 90% $27, Redwood $61,381 60% 80% 90% $26, Redwood $61,381 60% 80% 90% $26, Redwood $40,842 60% 80% 90% $17, Redwood $94,095 65% 80% 90% $44, Redwood $40,842 40% 80% 90% $11, Redwood $102,294 55% 80% 90% $40, Redwood $73,224 55% 80% 90% $28, Western red cedar $41,086 55% 80% 50% $9, Ginkgo $9,413 45% 80% 70% $2, Ginkgo $2,504 60% 80% 70% $ Ginkgo $5,777 70% 80% 70% $2, Deodar cedar $109,002 65% 80% 90% $51, Deodar cedar $40,842 60% 80% 90% $17, Southern magnolia $37,612 60% 80% 70% $12, Douglas fir $32,327 60% 80% 70% $10, Ginkgo $3,631 60% 80% 70% $1, Ginkgo $8,431 70% 80% 70% $3, Ginkgo $8,431 65% 80% 70% $3, Ginkgo $8,431 70% 80% 70% $3, Ginkgo $11,594 70% 80% 70% $4, Ginkgo $11,594 65% 80% 70% $4, Japanese Black Pine $14,523 50% 80% 50% $2, Camphor $12,042 40% 80% 50% $1, Camphor $21,980 60% 80% 50% $5, Camphor $15,662 50% 80% 50% $3,132 Page 1 of 2

5 Tree Survey Kevin R. Kielty Certified Arborist Tree # Species Nursery Group DBH (inches) Trunk Area (TA) Replacement Trunk Area (TA R ) TA incr (= TA - TA R ) Basic Tree Cost ( = TA incr x Unit Tree Cost ) Condition Location Species Rating Unit Tree Cost 45 Camphor $10,424 50% 80% 50% $2, Camphor $32,149 60% 80% 50% $7, Camphor $19,746 55% 80% 50% $4, Deodar cedar $21,213 60% 80% 90% $9, Camphor $19,746 70% 80% 50% $5, Camphor $24,368 65% 80% 50% $6, Camphor $21,980 65% 80% 50% $5, Camphor $17,666 70% 80% 50% $4, Camphor $13,814 60% 80% 50% $3, Camphor $21,980 65% 80% 50% $5, Camphor $17,666 60% 80% 50% $4, Camphor $10,424 65% 80% 50% $2, Camphor $29,453 60% 80% 50% $7, Camphor $15,662 60% 80% 50% $3, Camphor $19,746 60% 80% 50% $4, Camphor $29,453 60% 80% 50% $7, Coast live oak $3,909 45% 80% 90% $1, Srawberry tree $7,508 55% 70% 70% $2, Strawberry tree $2,346 55% 70% 70% $632 $858,058 Page 2 of 2

6 Site: California Water Department Tree Evaluation Schedule Landscape Units Fate: Preserve/ Remove Species Value % Condition Value % Location Value % 0.35 Caliper Inches.70 if in allowable bldg. area 1.25 if Heritage Tree Ref. Species Name Botanical Name LU Value 1 Monterey pine Pinus radiata 30% 50% 60% Deodar cedar Cedrus deodara 90% 50% 75% Redwood Sequoia sempervirens 90% 55% 75% Redwood Sequoia sempervirens 90% 40% 75% Redwood Sequoia sempervirens 90% 55% 75% Redwood Sequoia sempervirens 90% 65% 75% Redwood Sequoia sempervirens 90% 55% 75% Deodar cedar Cedrus deodara 90% 50% 75% Redwood Sequoia sempervirens 90% 60% 75% Ginkgo Ginkgo biloba 70% 50% 75% Ginkgo Ginkgo biloba 70% 60% 75% Coast live oak Quercus agrifolia 90% 60% 75% Deodar cedar Cedrus deodara 90% 55% 75% Deodar cedar Cedrus deodara 90% 45% 75% Deodar cedar Cedrus deodara 90% 25% 75% Redwood Sequoia sempervirens 90% 60% 75% Douglas fir Pseudotsuga menziesii 70% 65% 75% Redwood Sequoia sempervirens 90% 60% 75% Redwood Sequoia sempervirens 90% 60% 75% Redwood Sequoia sempervirens 90% 60% 75% Redwood Sequoia sempervirens 90% 65% 75% Redwood Sequoia sempervirens 90% 40% 75% Redwood Sequoia sempervirens 90% 55% 75% Redwood Sequoia sempervirens 90% 55% 75% Redwood Sequoia sempervirens 90% 55% 75% Redwood Sequoia sempervirens 90% 45% 75% Western red cedar Thuja plicata 50% 60% 65% Ginkgo Ginkgo biloba 70% 70% 75% Ginkgo Ginkgo biloba 70% 65% 75% Ginkgo Ginkgo biloba 70% 60% 75% Deodar cedar Cedrus deodora 90% 60% 75% KIELTY ARBORIST SERVICES P.O. Box 6187, San Mateo, CA kkarbor0476@yahoo.com

7 Fate: Preserve/ Remove Species Value % Condition Value % Location Value % 0.35 Caliper Inches.70 if in allowable bldg. area 1.25 if Heritage Tree Ref. Species Name Botanical Name LU Value 32 Deodar cedar Cedrus deodora 90% 60% 75% Southern magnolia Magnolia grandiflora 70% 60% 75% Douglas Fir Pseudotsuga menziesii 70% 70% 75% Ginkgo Ginkgo biloba 70% 65% 75% Ginkgo Ginkgo biloba 70% 70% 75% Ginkgo Ginkgo biloba 70% 70% 75% Ginkgo Ginkgo biloba 70% 65% 75% Ginkgo Ginkgo biloba 70% 50% 75% Ginkgo Ginkgo biloba 70% 40% 75% Japanese Black Pine Pinus thunbergiana 50% 60% 75% Camphor Cinnamomum camphora 50% 50% 70% Camphor Cinnamomum camphora 50% 50% 70% Camphor Cinnamomum camphora 50% 60% 70% Camphor Cinnamomum camphora 50% 55% 70% Camphor Cinnamomum camphora 50% 60% 70% Camphor Cinnamomum camphora 50% 70% 70% Deodar cedar Cedrus deodora 90% 65% 70% Camphor Cinnamomum camphora 50% 65% 75% Camphor Cinnamomum camphora 50% 70% 75% Camphor Cinnamomum camphora 50% 60% 75% Camphor Cinnamomum camphora 50% 65% 75% Camphor Cinnamomum camphora 50% 60% 75% Camphor Cinnamomum camphora 50% 65% 75% Camphor Cinnamomum camphora 50% 60% 75% Camphor Cinnamomum camphora 50% 60% 75% Camphor Cinnamomum camphora 50% 60% 75% Camphor Cinnamomum camphora 50% 60% 75% Camphor Cinnamomum camphora 50% 45% 75% Camphor Cinnamomum camphora 50% 55% 75% Coast live oak Quercus agrifolia 90% 55% 75% Strawberry tree Arbutus unedo 70% 55% 70% Strawberry tree Arbutus unedo 70% 55% 70% KIELTY ARBORIST SERVICES P.O. Box 6187, San Mateo, CA kkarbor0476@yahoo.com

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