﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2010v3.2" xsi:schemaLocation="http://www.irs.gov/efile">
  <ReturnHeader binaryAttachmentCount="0">
    <Timestamp>2011-05-11T10:59:11-07:00</Timestamp>
    <TaxPeriodEndDate>2010-12-31</TaxPeriodEndDate>
    <PreparerFirm>
      <PreparerFirmBusinessName>
        <BusinessNameLine1>KLAUSNER BENDLER ASSOCIATES PC</BusinessNameLine1>
      </PreparerFirmBusinessName>
      <PreparerFirmUSAddress>
        <AddressLine1>4550 MONTGOMERY AVE STE 351N</AddressLine1>
        <City>BETHESDA</City>
        <State>MD</State>
        <ZIPCode>208143304</ZIPCode>
      </PreparerFirmUSAddress>
    </PreparerFirm>
    <ReturnType>990EZ</ReturnType>
    <TaxPeriodBeginDate>2010-01-01</TaxPeriodBeginDate>
    <Filer>
      <EIN>900396157</EIN>
      <Name>
        <BusinessNameLine1>POTOMAC CHAPTER OF AMERICAN SOCIETY OF</BusinessNameLine1>
        <BusinessNameLine2>LANDSCAPE ARCHITECTS</BusinessNameLine2>
      </Name>
      <NameControl>POTO</NameControl>
      <USAddress>
        <AddressLine1>PO BOX 18184</AddressLine1>
        <City>WASHINGTON</City>
        <State>DC</State>
        <ZIPCode>20036</ZIPCode>
      </USAddress>
    </Filer>
    <Officer>
      <Name>MARK J MASTALERZ</Name>
      <Title>Treasurer</Title>
      <DateSigned>2011-05-11</DateSigned>
    </Officer>
    <Preparer>
      <Name>Cal Klausner CPA ABV CFE</Name>
      <Phone>3016574111</Phone>
    </Preparer>
    <TaxYear>2010</TaxYear>
    <BuildTS>2016-02-24 21:20:13Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCount="3">
    <IRS990EZ documentId="IRS990EZ" referenceDocumentId="IRS990ScheduleO TransfersPersonalBenefitsContr" softwareId="10000105" softwareVersion="2010v3.2">
      <MethodOfAccountingCash>X</MethodOfAccountingCash>
      <ScheduleBNotRequired>X</ScheduleBNotRequired>
      <WebSite>www.potomacasla.org</WebSite>
      <Organization501c typeOf501cOrganization="6">X</Organization501c>
      <GrossReceipts>59287</GrossReceipts>
      <InfoInScheduleOPartI>X</InfoInScheduleOPartI>
      <ContributionsGiftsGrantsEtc>29200</ContributionsGiftsGrantsEtc>
      <MembershipDues>12428</MembershipDues>
      <InvestmentIncome>699</InvestmentIncome>
      <CostOtherBasisAndSalesExpenses>0</CostOtherBasisAndSalesExpenses>
      <FundraisingGrossIncome referenceDocumentId=" IRS990ScheduleG">16960</FundraisingGrossIncome>
      <SpecialEventsDirectExpenses>3155</SpecialEventsDirectExpenses>
      <SpecialEventsNetIncomeLoss>13805</SpecialEventsNetIncomeLoss>
      <CostOfGoodsSold>0</CostOfGoodsSold>
      <TotalRevenue>56132</TotalRevenue>
      <GrantsAndSimilarAmountsPaid>600</GrantsAndSimilarAmountsPaid>
      <PrintingPublicationsPostage>28905</PrintingPublicationsPostage>
      <OtherExpensesTotal>22142</OtherExpensesTotal>
      <TotalExpenses>51647</TotalExpenses>
      <ExcessOrDeficitForYear>4485</ExcessOrDeficitForYear>
      <NetAssetsOrFundBalancesBOY>85800</NetAssetsOrFundBalancesBOY>
      <OtherChangesInNetAssets>2638</OtherChangesInNetAssets>
      <NetAssetsOrFundBalancesEOY>92923</NetAssetsOrFundBalancesEOY>
      <CashSavingsAndInvestments>
        <BOY>85800</BOY>
        <EOY>92923</EOY>
      </CashSavingsAndInvestments>
      <TotalAssets>
        <BOY>85800</BOY>
        <EOY>92923</EOY>
      </TotalAssets>
      <NetAssetsOrFundBalances>
        <BOY>85800</BOY>
        <EOY>92923</EOY>
      </NetAssetsOrFundBalances>
      <PrimaryExemptPurpose>THE ORGANIZATION'S MISSION IS TO PROMOTE THE LANDSCAPE ARCHITECTURE PROFESSION AND ADVANCES THE PRACTICE AND SUSTAINABLE DESIGN THROUGH ADVOCACY, EDUCATION, COMMUNICATION, AND FELLOWSHIP.</PrimaryExemptPurpose>
      <ProgramServiceAccomplishment>
        <DescriptionProgramServiceAccom>PROMOTE THE LANDSCAPE ARCHITECTURE PROFESSION AND ADVANCES THE PRACTICE AND SUSTAINABLE DESIGN</DescriptionProgramServiceAccom>
      </ProgramServiceAccomplishment>
      <OfficerDirectorTrusteeKeyEmpl>
        <PersonName>W LISA SIRIAMNUAYPAS</PersonName>
        <AddressUS>
          <AddressLine1>9405 FERNWOOD ROAD</AddressLine1>
          <City>BETHESDA</City>
          <State>MD</State>
          <ZIPCode>20817</ZIPCode>
        </AddressUS>
        <Title>PAST-PRESIDENT</Title>
        <AvgHoursPerWkDevotedToPosition>0</AvgHoursPerWkDevotedToPosition>
        <Compensation>0</Compensation>
      </OfficerDirectorTrusteeKeyEmpl>
      <OfficerDirectorTrusteeKeyEmpl>
        <PersonName>SARAH COUCHMAN</PersonName>
        <AddressUS>
          <AddressLine1>815 N ROYAL STREET</AddressLine1>
          <City>ALEXANDRIA</City>
          <State>VA</State>
          <ZIPCode>22314</ZIPCode>
        </AddressUS>
        <Title>Secretary</Title>
        <AvgHoursPerWkDevotedToPosition>0</AvgHoursPerWkDevotedToPosition>
        <Compensation>0</Compensation>
      </OfficerDirectorTrusteeKeyEmpl>
      <OfficerDirectorTrusteeKeyEmpl>
        <PersonName>STEVEN E LEFTON</PersonName>
        <AddressUS>
          <AddressLine1>13221 WOODLAND PARK RD</AddressLine1>
          <City>HERDON</City>
          <State>VA</State>
          <ZIPCode>20171</ZIPCode>
        </AddressUS>
        <Title>President ELECT</Title>
        <AvgHoursPerWkDevotedToPosition>0</AvgHoursPerWkDevotedToPosition>
        <Compensation>0</Compensation>
      </OfficerDirectorTrusteeKeyEmpl>
      <OfficerDirectorTrusteeKeyEmpl>
        <PersonName>RON M KAGAWA</PersonName>
        <AddressUS>
          <AddressLine1>933 N LIVINGSTON STREET</AddressLine1>
          <City>ARLINGTON</City>
          <State>VA</State>
          <ZIPCode>22205</ZIPCode>
        </AddressUS>
        <Title>Trustee</Title>
        <AvgHoursPerWkDevotedToPosition>0</AvgHoursPerWkDevotedToPosition>
        <Compensation>0</Compensation>
      </OfficerDirectorTrusteeKeyEmpl>
      <OfficerDirectorTrusteeKeyEmpl>
        <PersonName>PAUL KELSCH</PersonName>
        <AddressUS>
          <AddressLine1>300 COMMONWEALTH AVE</AddressLine1>
          <City>ALEXANDRIA</City>
          <State>VA</State>
          <ZIPCode>22301</ZIPCode>
        </AddressUS>
        <Title>MEMBER-AT-LARGE</Title>
        <AvgHoursPerWkDevotedToPosition>0</AvgHoursPerWkDevotedToPosition>
        <Compensation>0</Compensation>
      </OfficerDirectorTrusteeKeyEmpl>
      <OfficerDirectorTrusteeKeyEmpl>
        <PersonName>BETHANY CARTON</PersonName>
        <AddressUS>
          <AddressLine1>911 QUEEN STREET</AddressLine1>
          <City>ALEXANDRIA</City>
          <State>VA</State>
          <ZIPCode>22314</ZIPCode>
        </AddressUS>
        <Title>President</Title>
        <AvgHoursPerWkDevotedToPosition>0</AvgHoursPerWkDevotedToPosition>
        <Compensation>0</Compensation>
      </OfficerDirectorTrusteeKeyEmpl>
      <OfficerDirectorTrusteeKeyEmpl>
        <PersonName>MARK J MASTALERZ</PersonName>
        <AddressUS>
          <AddressLine1>201 S LEXINGTON ST</AddressLine1>
          <City>ARLINGTON</City>
          <State>VA</State>
          <ZIPCode>22204</ZIPCode>
        </AddressUS>
        <Title>Treasurer</Title>
        <AvgHoursPerWkDevotedToPosition>0</AvgHoursPerWkDevotedToPosition>
        <Compensation>0</Compensation>
      </OfficerDirectorTrusteeKeyEmpl>
      <OfficerDirectorTrusteeKeyEmpl>
        <PersonName>ADELE ASHKAR</PersonName>
        <AddressUS>
          <AddressLine1>2101 F STREET SUITE 102</AddressLine1>
          <City>WASHINGTON</City>
          <State>DC</State>
          <ZIPCode>20052</ZIPCode>
        </AddressUS>
        <Title>MEMBER-AT-LARGE</Title>
        <AvgHoursPerWkDevotedToPosition>0</AvgHoursPerWkDevotedToPosition>
        <Compensation>0</Compensation>
      </OfficerDirectorTrusteeKeyEmpl>
      <OfficerDirectorTrusteeKeyEmpl>
        <PersonName>JEANETTE ANOKOMA-SEY</PersonName>
        <AddressUS>
          <AddressLine1>9 SOUTH EARLY STREET</AddressLine1>
          <City>ALEXANDRIA</City>
          <State>VA</State>
          <ZIPCode>22304</ZIPCode>
        </AddressUS>
        <Title>MEMBER-AT-LARGE</Title>
        <AvgHoursPerWkDevotedToPosition>0</AvgHoursPerWkDevotedToPosition>
        <Compensation>0</Compensation>
      </OfficerDirectorTrusteeKeyEmpl>
      <ActivitiesNotPreviouslyRpt>false</ActivitiesNotPreviouslyRpt>
      <MadeChangesToOrgnzngEtcDoc>false</MadeChangesToOrgnzngEtcDoc>
      <OrganizationHadUBI>false</OrganizationHadUBI>
      <OrganizationDissolvedEtc>false</OrganizationDissolvedEtc>
      <DidOrgFileForm1120POLThisYear>false</DidOrgFileForm1120POLThisYear>
      <MadeLoansToFromOfficers>false</MadeLoansToFromOfficers>
      <InitiationFeesAndCapitalContri>0</InitiationFeesAndCapitalContri>
      <GrossReceiptsForPublicUse>0</GrossReceiptsForPublicUse>
      <ProhibitedTaxShelterTrans>false</ProhibitedTaxShelterTrans>
      <TheBooksAreInCareOf>
        <NamePerson>MARK MASTALERZ TREASURER</NamePerson>
        <AddressUS>
          <AddressLine1>201 S LEXINGTON ST</AddressLine1>
          <City>ARLINGTON</City>
          <State>VA</State>
          <ZIPCode>222041148</ZIPCode>
        </AddressUS>
        <TelephoneNumber>7036837447</TelephoneNumber>
      </TheBooksAreInCareOf>
      <ForeignFinancialAccount>false</ForeignFinancialAccount>
      <ForeignOffice>false</ForeignOffice>
      <MaintainAnyDonorAdvisedFunds>false</MaintainAnyDonorAdvisedFunds>
      <DoesOrgHaveHospital>false</DoesOrgHaveHospital>
      <TanningServicesProvided>false</TanningServicesProvided>
      <Form720Filed>false</Form720Filed>
      <RelatedOrgControlledEntity>false</RelatedOrgControlledEntity>
      <TransactionWithControlEntity>false</TransactionWithControlEntity>
      <EngagePoliticalCmpgnActivities>false</EngagePoliticalCmpgnActivities>
      <PartVIOfCompOfHighestPaidEmpl>NONE</PartVIOfCompOfHighestPaidEmpl>
      <PartVIAHghstPaidCntrctProfSer>NONE</PartVIAHghstPaidCntrctProfSer>
    </IRS990EZ>
    <IRS990ScheduleG documentId="IRS990ScheduleG" softwareId="10000105" softwareVersion="2010v3.2">
      <EventsInformation>
        <NameOfEvent1>ASLA - TIME SPACE</NameOfEvent1>
        <GrossReceiptsEvent1>15250</GrossReceiptsEvent1>
        <GrossRevenueEvent1>15250</GrossRevenueEvent1>
        <OtherDirectExpensesEvent1>-1371</OtherDirectExpensesEvent1>
        <GrossReceiptsTotal>15250</GrossReceiptsTotal>
        <GrossRevenueTotalEvents>15250</GrossRevenueTotalEvents>
        <OtherDirectExpensesTotalEvents>-1371</OtherDirectExpensesTotalEvents>
        <DirectExpenseSummaryEvents>-1371</DirectExpenseSummaryEvents>
        <NetIncomeSummary>16621</NetIncomeSummary>
      </EventsInformation>
    </IRS990ScheduleG>
    <IRS990ScheduleO documentId="IRS990ScheduleO" softwareId="10000105" softwareVersion="2010v3.2">
      <GeneralExplanation>
        <Identifier>Form 990-EZ, Part I, Line 20.1001</Identifier>
        <ReturnReference>Other Changes In Net Assets Or Fund Balances.1001</ReturnReference>
        <Explanation>Net Unrealized Gains and Losses on Investments $2638</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990-EZ, Part I, Line 16.6</Identifier>
        <ReturnReference>Other Expenses.6</ReturnReference>
        <Explanation>DC NONPROFIT REPORT FILING $77</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990-EZ, Part I, Line 16.5</Identifier>
        <ReturnReference>Other Expenses.5</ReturnReference>
        <Explanation>PAYPAL CHARGES $170</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990-EZ, Part I, Line 16.3</Identifier>
        <ReturnReference>Other Expenses.3</ReturnReference>
        <Explanation>WEBSITE HOSTING $740</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990-EZ, Part I, Line 16.2</Identifier>
        <ReturnReference>Other Expenses.2</ReturnReference>
        <Explanation>MEALS $939</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990-EZ, Part I, Line 16.1007</Identifier>
        <ReturnReference>Other Expenses.1007</ReturnReference>
        <Explanation>Conferences, Conventions, and Meetings $19456</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990-EZ, Part I, Line 16.1005</Identifier>
        <ReturnReference>Other Expenses.1005</ReturnReference>
        <Explanation>Travel $623</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Form 990-EZ, Part I, Line 16.1002</Identifier>
        <ReturnReference>Other Expenses.1002</ReturnReference>
        <Explanation>Office Expenses $137</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
  </ReturnData>
</Return>