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<br />" <br /> <br />V" <br /> <br />~. S^N MAT~n ~~n SAN FRANrTScn <br />Spp J)pr 1 qRf- <br /> <br />1 <br /> <br />\ <br /> <br />SII013](Urhan land. <br /> <br />STlThis map unit consist.s of arpas whprp more than <br /> <br />P5 percent of the surface is cnvered by asphalt, conr.rpte, buildin~s, nr nthpr <br /> <br />irnrf'rvious material. These areas are mostly in the eastern part of thf' sur- <br /> <br />vey, mainly in the downtown business and industricl districts. Slopes arf> <br />generally 0 to 5 percent but range from 0 to 30 percent. Elf'vation is 10 to <br /> <br />325 feet. The avp.raqe annual precipitat.ion is 15 to 30 inches, the averaQP <br /> <br />annual> ilir temperaturp is 54 tn 58 dporef's F, and thf' avpr?op fr('lst.-frp.p. <br /> <br />period is ?75 to 350 days. <br /> <br />$IOIIrcluded in this unit are small areas of Orthents, Cut ann Fill, and <br /> <br />Ortherts, Reclaimed. Includpd arpas makp. up i'lbout 15 rJp.t'cpnt nf the total <br /> <br />acrp?op. <br /> <br />SJOJUrban land consists of arpas covered hy asphalt, concrete, buildinqs, or <br /> <br />other impervious material. <br /> <br />STOlTre scil propertips under the impervious matprial ilre hiohly variahle <br /> <br />because of the differprcps in the kind and amount of thp various fill matf'ri~l <br /> <br />in the profile. Runoff is rapid, and thf' hazard nf watf'r erosion is slioht. <br /> <br />SIOlThis unit is used for rpsidentii'll, c:ommprcial, industriC\l, transDoratic')l1, <br /> <br />and rer.rf'atinnal usps. <br /> <br />SIOllarc carahility classification is not assionp.d. <br /> <br />E X 8 \l L';' b <br /> <br />1-1 <br />