<?xml version="1.0" encoding="us-ascii"?>
<!--XBRL document created by RR Donnelley IM Processor 6.0.0.0 using Fujitsu Interstage XWand-->
<schema targetNamespace="http://www.appleseedfund.com/20130129" elementFormDefault="qualified" xmlns="http://www.w3.org/2001/XMLSchema" xmlns:ust15="http://www.appleseedfund.com/20130129" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric">
  <annotation>
    <appinfo>
      <link:linkbaseRef xlink:type="simple" xlink:href="ust15-20130129_pre.xml" xlink:title="Presentation Links, all" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="ust15-20130129_cal.xml" xlink:title="Calculation Links, all" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="ust15-20130129_def.xml" xlink:title="Definition Links, all" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="ust15-20130129_lab.xml" xlink:title="Label Links, all" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:roleType roleURI="http://www.appleseedfund.com/role/DocumentDocumentandEntityInformation" id="DocumentDocumentandEntityInformation">
        <link:definition>000000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.appleseedfund.com/role/DocumentRiskReturnSummaryUnlabeledAppleseedFund" id="DocumentRiskReturnSummaryUnlabeledAppleseedFund">
        <link:definition>000011 - Document - Risk/Return Summary {Unlabeled} - Appleseed Fund</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.appleseedfund.com/role/ScheduleShareholderFeesAppleseedFund" id="ScheduleShareholderFeesAppleseedFund">
        <link:definition>000012 - Schedule - Shareholder Fees {- Appleseed Fund}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.appleseedfund.com/role/ScheduleAnnualFundOperatingExpensesAppleseedFund" id="ScheduleAnnualFundOperatingExpensesAppleseedFund">
        <link:definition>000013 - Schedule - Annual Fund Operating Expenses {- Appleseed Fund}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.appleseedfund.com/role/ScheduleExpenseExampleTransposedAppleseedFund" id="ScheduleExpenseExampleTransposedAppleseedFund">
        <link:definition>000014 - Schedule - Expense Example {Transposed} {- Appleseed Fund}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.appleseedfund.com/role/ScheduleExpenseExampleNoRedemptionTransposedAppleseedFund" id="ScheduleExpenseExampleNoRedemptionTransposedAppleseedFund">
        <link:definition>000015 - Schedule - Expense Example, No Redemption {Transposed} {- Appleseed Fund}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.appleseedfund.com/role/ScheduleAnnualTotalReturnsAppleseedFundBarChart" id="ScheduleAnnualTotalReturnsAppleseedFundBarChart">
        <link:definition>000016 - Schedule - Annual Total Returns - Appleseed Fund [BarChart]</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.appleseedfund.com/role/ScheduleAverageAnnualTotalReturnsTransposedAppleseedFund" id="ScheduleAverageAnnualTotalReturnsTransposedAppleseedFund">
        <link:definition>000017 - Schedule - Average Annual Total Returns {Transposed} {- Appleseed Fund}</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.appleseedfund.com/role/DocumentRiskReturnDetailUnlabeledAppleseedFund" id="DocumentRiskReturnDetailUnlabeledAppleseedFund">
        <link:definition>000018 - Document - Risk/Return Detail {Unlabeled} - Appleseed Fund</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.appleseedfund.com/role/DisclosureRiskReturnDetailDataElementsAppleseedFund" id="DisclosureRiskReturnDetailDataElementsAppleseedFund">
        <link:definition>000019 - Disclosure - Risk/Return Detail Data {Elements} - Appleseed Fund</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </appinfo>
  </annotation>
  <import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />
  <import namespace="http://xbrl.sec.gov/dei/2012-01-31" schemaLocation="http://xbrl.sec.gov/dei/2012/dei-2012-01-31.xsd" />
  <import namespace="http://xbrl.sec.gov/rr/2012-01-31" schemaLocation="http://xbrl.sec.gov/rr/2012/rr-2012-01-31.xsd" />
  <import namespace="http://www.xbrl.org/dtr/type/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" />
  <element name="S000014625Member" id="ust15_S000014625Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="C000093602Member" id="ust15_C000093602Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="C000040026Member" id="ust15_C000040026Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element name="SAndPFiveHundredIndexMember" id="ust15_SAndPFiveHundredIndexMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
</schema>
