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'w..� ®� �IIIVIW �fliliNbN R ( ) II tt� il wwwum 0!` I I p f q`� "�y "�' PI uN 1411NINIIVN4 YN��!1�I1Iy1I1,I ^�tt INI ` IU IIII IMF „ „y� y^^;, gyp 1�0 \ry�;,�9,�” � ^ W {pr � 4II IIIp �j �Arvn6V1 �11111n�dfllY �111NIM (IIII IIIIY� tli �Vl� d IIII )J �!I @a I II �A g`Iryl� "ryNnn�Vry ,y tlp q ,y tlll I � d 4 / II `�'� IIpWIM �j I'IpPp Annual Report u w uii �,��ai r; for y a��.:i through June 2015 We surpassed the water quality standards for our Mason Farm Wastewater Treatment Plant (WWTP). The phosphorus level in our treated wastewater was 7% below the limit and nitrogen was 71% below the limit. Limiting phosphorus and nitrogen is important for water quality because they promote excessive growth of algae, which reduces water quality and makes water more difficult and expensive to treat for drinking purposes. We treated and recycled 1,597 dry tons of wastewater biosolids. Biosolids are solids which we separate from wastewater and treat so that they can be recycled in agriculture or landscaping. Our Class A biosolids continue to meet the U.S. Environmental Protection Agency's (EPA's) standards for Exceptional Quality. In September 2014, we completed $10.4 million of improvements at our WWTP which reduced electricity use per gallon of wastewater by about 30% ($250 ®000 annual savings); will help us meet future standards for treated wastewater; and further eliminated off -site odor. There were two overflows from our sanitary sewers. The overflows totaled an estimated 1,100 gallons or a fraction of one percent of total wastewater volume (2.95 billion gallons). In 2014, we began a review of opportunities to reduce biosolids management costs while ensuring sustainable use of biosolids. A key issue in this study is whether OWASA should continue applying liquid biosolids to approved farmlands.