-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 MSDaUkseatou31LCZDRdRK74ABgGe4HA5cKpomdx1TvE4yl+vzLkHauF8GgksQrY
 Q8tKdwU/1397kS/UoFC7cQ==

<SEC-DOCUMENT>0001179110-10-018053.txt : 20101222
<SEC-HEADER>0001179110-10-018053.hdr.sgml : 20101222
<ACCEPTANCE-DATETIME>20101222163301
ACCESSION NUMBER:		0001179110-10-018053
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20101206
FILED AS OF DATE:		20101222
DATE AS OF CHANGE:		20101222

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Bennet Thomas W Jr
		CENTRAL INDEX KEY:			0001436887

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-09947
		FILM NUMBER:		101269074

	MAIL ADDRESS:	
		STREET 1:		TRC COMPANIES INC
		STREET 2:		21 GRIFFIN ROAD NORTH
		CITY:			WINDSOR
		STATE:			CT
		ZIP:			06095

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TRC COMPANIES INC /DE/
		CENTRAL INDEX KEY:			0000103096
		STANDARD INDUSTRIAL CLASSIFICATION:	HAZARDOUS WASTE MANAGEMENT [4955]
		IRS NUMBER:				060853807
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		21 GRIFFIN ROAD NORTH
		CITY:			WINDSOR
		STATE:			CT
		ZIP:			06095
		BUSINESS PHONE:		8602986212

	MAIL ADDRESS:	
		STREET 1:		21 GRIFFIN ROAD NORTH
		CITY:			WINDSOR
		STATE:			CT
		ZIP:			06095

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	VAST INC /DE/
		DATE OF NAME CHANGE:	19761201
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-12-06</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000103096</issuerCik>
        <issuerName>TRC COMPANIES INC /DE/</issuerName>
        <issuerTradingSymbol>TRR</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001436887</rptOwnerCik>
            <rptOwnerName>Bennet Thomas W Jr</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>TRC COMPANIES, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>21 GRIFFIN ROAD NORTH</rptOwnerStreet2>
            <rptOwnerCity>WINDSOR</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06095</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Sr. Vice Pres. and CFO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $.10 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2010-12-06</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2010-12-06</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>100</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.62</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>169284</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option - non-qualified</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>5.09</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2009-06-02</value>
            </exerciseDate>
            <expirationDate>
                <value>2015-06-02</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>10000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>10000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>Thomas W. Bennet Jr.</signatureName>
        <signatureDate>2010-12-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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