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CITY OF PLEASANTON URBAN FOREST MASTER PLAN | 137 <br />DEVELOPING THE PLEASANTON URBAN FOREST MASTER PLAN <br />Table 2-12. Relative Performance Index for the Six Most Common Species in Pleasanton’s Inventory <br />Relative Performance Index (RPI) <br />Goal: Six Most Common Species have <br />an RPI Score of 1.0 or Higher <br />Rank Botanical name Common name RPI <br />City Inventory Entire Inventory Average 1.76 <br />1 Platanus x <br />hispanica London plane 0.7 <br />2 Quercus agrifolia coast live oak 2.4 <br />3 Sequoia <br />sempervirens coast redwood 0.1 <br />4 Quercus lobata valley oak 2.7 <br />5 Pistacia chinensis Chinese pistache 0.8 <br />6 Lagerstroemia <br />indica crape myrtle 0.6 <br />RPI Average 1.22 <br />Source: City of Pleasanton Tree Inventory (Dudek 2024) <br />The City of Pleasanton is not currently meeting the <br />recommended RPI goal as the City’s top six tree species <br />average score is currently 1.22, and the average score <br />for the entire tree inventory is 1.76. While the City’s two <br />most common oak species have RPI scores greater than <br />2.0, the other four of the six most common tree species <br />in Pleasanton have RPI scores below the overall average. <br />The first and third most common tree species in the City <br />inventory, Sequoia sempervirens has the lowest RPI <br />score of 0.1, and is considered unsuitable for Pleasanton’s <br />predicted future climate without supplemental watering <br />(McBride and Lacan 2022). Although Platanus x hispanica <br />and Lagerstroemia indica both have RPI scores below 1, <br />these two tree species are staples within Pleasanton and <br />there are many examples of these two species performing <br />well even in tough conditions, such as the Platanus x <br />hispanica trees that have survived without irrigation along <br />Bernal Avenue (See Figure 1-7 in Part 1) <br />Recommendations <br /> ƒThe City should enhance maintenance practices with <br />targeted care, such as improved watering, pruning, and <br />pest management. Increased monitoring will help address <br />health issues promptly. For persistently unhealthy species, <br />phased replacement with species that typically have <br />higher RPI scores is recommended.